X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/5a66c31b0ec1f4128df4398e18dfe497c2a34de7..0a2de84c8a05643d1a87b97a3a265a68ec246031:/src/src/exim.c?ds=sidebyside diff --git a/src/src/exim.c b/src/src/exim.c index 3ab657fea..201bf6e8e 100644 --- a/src/src/exim.c +++ b/src/src/exim.c @@ -2,8 +2,10 @@ * Exim - an Internet mail transport agent * *************************************************/ -/* Copyright (c) University of Cambridge 1995 - 2014 */ +/* Copyright (c) The Exim Maintainers 2020 - 2024 */ +/* Copyright (c) University of Cambridge 1995 - 2018 */ /* See the file NOTICE for conditions of use and distribution. */ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* The main function: entry point, initialization, and high-level control. @@ -12,7 +14,26 @@ Also a few functions that don't naturally fit elsewhere. */ #include "exim.h" +#if defined(__GLIBC__) && !defined(__UCLIBC__) +# include +#endif + +#ifndef _TIME_H +# include +#endif +#ifndef NO_EXECINFO +# include +#endif + +#ifdef USE_GNUTLS +# include +# if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP) +# define DISABLE_OCSP +# endif +#endif + extern void init_lookup_list(void); +extern void init_misc_mod_list(void); @@ -24,29 +45,36 @@ extern void init_lookup_list(void); for store allocation via Exim's store manager. The normal calls are actually macros that pass over location information to make tracing easier. These functions just interface to the standard macro calls. A good compiler will -optimize out the tail recursion and so not make them too expensive. There -are two sets of functions; one for use when we want to retain the compiled -regular expression for a long time; the other for short-term use. */ +optimize out the tail recursion and so not make them too expensive. */ static void * -function_store_get(size_t size) +function_store_malloc(PCRE2_SIZE size, void * tag) { -return store_get((int)size); +if (size > INT_MAX) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "excessive memory alloc request"); +return store_malloc((int)size); } static void -function_dummy_free(void *block) { block = block; } +function_store_free(void * block, void * tag) +{ +/* At least some version of pcre2 pass a null pointer */ +if (block) store_free(block); +} + static void * -function_store_malloc(size_t size) +function_store_get(PCRE2_SIZE size, void * tag) { -return store_malloc((int)size); +if (size > INT_MAX) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "excessive memory alloc request"); +return store_get((int)size, GET_UNTAINTED); /* loses track of taint */ } static void -function_store_free(void *block) +function_store_nullfree(void * block, void * tag) { -store_free(block); +/* We cannot free memory allocated using store_get() */ } @@ -62,44 +90,16 @@ enum commandline_info { CMDINFO_NONE=0, -/************************************************* -* Compile regular expression and panic on fail * -*************************************************/ - -/* This function is called when failure to compile a regular expression leads -to a panic exit. In other cases, pcre_compile() is called directly. In many -cases where this function is used, the results of the compilation are to be -placed in long-lived store, so we temporarily reset the store management -functions that PCRE uses if the use_malloc flag is set. - -Argument: - pattern the pattern to compile - caseless TRUE if caseless matching is required - use_malloc TRUE if compile into malloc store +static void +pcre_init(void) +{ +pcre_mlc_ctx = pcre2_general_context_create(function_store_malloc, function_store_free, NULL); +pcre_gen_ctx = pcre2_general_context_create(function_store_get, function_store_nullfree, NULL); -Returns: pointer to the compiled pattern -*/ +pcre_mlc_cmp_ctx = pcre2_compile_context_create(pcre_mlc_ctx); +pcre_gen_cmp_ctx = pcre2_compile_context_create(pcre_gen_ctx); -const pcre * -regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc) -{ -int offset; -int options = PCRE_COPT; -const pcre *yield; -const uschar *error; -if (use_malloc) - { - pcre_malloc = function_store_malloc; - pcre_free = function_store_free; - } -if (caseless) options |= PCRE_CASELESS; -yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL); -pcre_malloc = function_store_get; -pcre_free = function_dummy_free; -if (yield == NULL) - log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: " - "%s at offset %d while compiling %s", error, offset, pattern); -return yield; +pcre_gen_mtc_ctx = pcre2_match_context_create(pcre_gen_ctx); } @@ -110,7 +110,10 @@ return yield; *************************************************/ /* This function runs a regular expression match, and sets up the pointers to -the matched substrings. +the matched substrings. The matched strings are copied so the lifetime of +the subject is not a problem. Matched strings will have the same taint status +as the subject string (this is not a de-taint method, and must not be made so +given the support for wildcards in REs). Arguments: re the compiled expression @@ -120,32 +123,78 @@ Arguments: if >= 0 setup from setup+1 onwards, excluding the full matched string -Returns: TRUE or FALSE +Returns: TRUE if matched, or FALSE */ BOOL -regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup) +regex_match_and_setup(const pcre2_code * re, const uschar * subject, int options, int setup) { -int ovector[3*(EXPAND_MAXN+1)]; -int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0, - PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int)); -BOOL yield = n >= 0; -if (n == 0) n = EXPAND_MAXN + 1; -if (yield) +pcre2_match_data * md = pcre2_match_data_create_from_pattern(re, pcre_gen_ctx); +int res = pcre2_match(re, (PCRE2_SPTR)subject, PCRE2_ZERO_TERMINATED, 0, + PCRE_EOPT | options, md, pcre_gen_mtc_ctx); +BOOL yield; + +if ((yield = (res >= 0))) { - int nn; - expand_nmax = (setup < 0)? 0 : setup + 1; - for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2) + PCRE2_SIZE * ovec = pcre2_get_ovector_pointer(md); + res = pcre2_get_ovector_count(md); + expand_nmax = setup < 0 ? 0 : setup + 1; + for (int matchnum = setup < 0 ? 0 : 1; matchnum < res; matchnum++) { - expand_nstring[expand_nmax] = subject + ovector[nn]; - expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn]; + /* Although PCRE2 has a pcre2_substring_get_bynumber() conveneience, it + seems to return a bad pointer when a capture group had no data, eg. (.*) + matching zero letters. So use the underlying ovec and hope (!) that the + offsets are sane (including that case). Should we go further and range- + check each one vs. the subject string length? */ + int off = matchnum * 2; + int len = ovec[off + 1] - ovec[off]; + expand_nstring[expand_nmax] = string_copyn(subject + ovec[off], len); + expand_nlength[expand_nmax++] = len; } expand_nmax--; } +else if (res != PCRE2_ERROR_NOMATCH) DEBUG(D_any) + { + uschar errbuf[128]; + pcre2_get_error_message(res, errbuf, sizeof(errbuf)); + debug_printf_indent("pcre2: %s\n", errbuf); + } +/* pcre2_match_data_free(md); gen ctx needs no free */ return yield; } +/* Check just for match with regex. Uses the common memory-handling. + +Arguments: + re compiled regex + subject string to be checked + slen length of subject; -1 for nul-terminated + rptr pointer for matched string, copied, or NULL + +Return: TRUE for a match. +*/ + +BOOL +regex_match(const pcre2_code * re, const uschar * subject, int slen, uschar ** rptr) +{ +pcre2_match_data * md = pcre2_match_data_create(1, pcre_gen_ctx); +int rc = pcre2_match(re, (PCRE2_SPTR)subject, + slen >= 0 ? slen : PCRE2_ZERO_TERMINATED, + 0, PCRE_EOPT, md, pcre_gen_mtc_ctx); +PCRE2_SIZE * ovec = pcre2_get_ovector_pointer(md); +BOOL ret = FALSE; + +if (rc >= 0) + { + if (rptr) + *rptr = string_copyn(subject + ovec[0], ovec[1] - ovec[0]); + ret = TRUE; + } +/* pcre2_match_data_free(md); gen ctx needs no free */ +return ret; +} + /************************************************* @@ -160,24 +209,116 @@ Returns: nothing */ void -set_process_info(const char *format, ...) +set_process_info(const char * format, ...) { +gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info }; +gstring * g; int len; +uschar * s; va_list ap; -sprintf(CS process_info, "%5d ", (int)getpid()); -len = Ustrlen(process_info); + +g = string_fmt_append(&gs, "%5d ", (int)getpid()); +len = gstring_length(g); va_start(ap, format); -if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap)) - Ustrcpy(process_info + len, "**** string overflowed buffer ****"); -len = Ustrlen(process_info); -process_info[len+0] = '\n'; -process_info[len+1] = '\0'; -process_info_len = len + 1; +if (!string_vformat(g, 0, format, ap)) + { + gs.ptr = len; + g = string_cat(&gs, US"**** string overflowed buffer ****"); + } +g = string_catn(g, US"\n", 1); +process_info_len = len_string_from_gstring(g, &s); DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info); va_end(ap); } +/*********************************************** +* Handler for SIGTERM * +***********************************************/ + +static void +term_handler(int sig) +{ +exim_exit(EXIT_FAILURE); +} + + +/*********************************************** +* Handler for SIGSEGV * +***********************************************/ + +#define STACKDUMP_MAX 24 +void +stackdump(void) +{ +#ifndef NO_EXECINFO +void * buf[STACKDUMP_MAX]; +char ** ss; +int nptrs = backtrace(buf, STACKDUMP_MAX); + +log_write(0, LOG_MAIN|LOG_PANIC, "backtrace"); +log_write(0, LOG_MAIN|LOG_PANIC, "---"); + +/* This function is officially not callable from a signal handler, as it +calls malloc() for the returned data. However, it seems to work - and we +know we're going on to crash anyway - so just hold our noses and do it. +A alternative might be backtrace_symbols_fd(). */ + +if ((ss = backtrace_symbols(buf, nptrs))) + { + for (int i = 0; i < nptrs; i++) + log_write(0, LOG_MAIN|LOG_PANIC, "\t%s", ss[i]); + free(ss); + } +else + log_write(0, LOG_MAIN|LOG_PANIC, "backtrace_symbols: %s", strerror(errno)); +log_write(0, LOG_MAIN|LOG_PANIC, "---"); +#endif +} +#undef STACKDUMP_MAX + + +static void +#ifdef SA_SIGINFO +segv_handler(int sig, siginfo_t * info, void * uctx) +{ +if (!panic_coredump) + { + log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (fault address: %p)", info->si_addr); + # if defined(SEGV_MAPERR) && defined(SEGV_ACCERR) && defined(SEGV_BNDERR) && defined(SEGV_PKUERR) + switch (info->si_code) + { + case SEGV_MAPERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_MAPERR"); break; + case SEGV_ACCERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_ACCERR"); break; + case SEGV_BNDERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_BNDERR"); break; + case SEGV_PKUERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_PKUERR"); break; + } + # endif + } +if (panic_coredump) + log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (deliberate trap)"); +else if (US info->si_addr < US 4096) + log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (null pointer indirection)"); +else + log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (maybe attempt to write to immutable memory)"); +if (process_info_len > 0) + log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (%s: %.*s)", + process_purpose, process_info_len, process_info); +stackdump(); +signal(SIGSEGV, SIG_DFL); +kill(getpid(), sig); +} +#else +segv_handler(int sig) +{ +log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (maybe attempt to write to immutable memory)"); +if (process_info_len > 0) + log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (%.*s)", process_info_len, process_info); +stackdump(); +signal(SIGSEGV, SIG_DFL); +kill(getpid(), sig); +} +#endif /************************************************* @@ -202,19 +343,8 @@ int fd; os_restarting_signal(sig, usr1_handler); -fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE); -if (fd < 0) - { - /* If we are already running as the Exim user, try to create it in the - current process (assuming spool_directory exists). Otherwise, if we are - root, do the creation in an exim:exim subprocess. */ - - int euid = geteuid(); - if (euid == exim_uid) - fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE); - else if (euid == root_uid) - fd = log_create_as_exim(process_log_path); - } +if (!process_log_path) return; +fd = log_open_as_exim(process_log_path); /* If we are neither exim nor root, or if we failed to create the log file, give up. There is not much useful we can do with errors, since we don't want @@ -222,7 +352,7 @@ to disrupt whatever is going on outside the signal handler. */ if (fd < 0) return; -{int dummy = write(fd, process_info, process_info_len); dummy = dummy; } +if (write(fd, process_info, process_info_len) != 0) ; (void)close(fd); } @@ -249,7 +379,6 @@ Returns: nothing void sigalrm_handler(int sig) { -sig = sig; /* Keep picky compilers happy */ sigalrm_seen = TRUE; os_non_restarting_signal(SIGALRM, sigalrm_handler); } @@ -267,6 +396,10 @@ will wait for ever, so we panic in this instance. (There was a case of this when a bug in a function that calls milliwait() caused it to pass invalid data. That's when I added the check. :-) +We assume it to be not worth sleeping for under 50us; this value will +require revisiting as hardware advances. This avoids the issue of +a zero-valued timer setting meaning "never fire". + Argument: an itimerval structure containing the interval Returns: nothing */ @@ -276,6 +409,10 @@ milliwait(struct itimerval *itval) { sigset_t sigmask; sigset_t old_sigmask; +int save_errno = errno; + +if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0) + return; (void)sigemptyset(&sigmask); /* Empty mask */ (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */ (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */ @@ -286,6 +423,8 @@ if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */ (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */ (void)sigsuspend(&sigmask); /* Until SIGALRM */ (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */ +errno = save_errno; +sigalrm_seen = FALSE; } @@ -306,11 +445,9 @@ Returns: nothing void millisleep(int msec) { -struct itimerval itval; -itval.it_interval.tv_sec = 0; -itval.it_interval.tv_usec = 0; -itval.it_value.tv_sec = msec/1000; -itval.it_value.tv_usec = (msec % 1000) * 1000; +struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0}, + .it_value = {.tv_sec = msec/1000, + .tv_usec = (msec % 1000) * 1000}}; milliwait(&itval); } @@ -328,7 +465,7 @@ Arguments: Returns: -1, 0, or +1 */ -int +static int exim_tvcmp(struct timeval *t1, struct timeval *t2) { if (t1->tv_sec > t2->tv_sec) return +1; @@ -345,10 +482,58 @@ return 0; * Clock tick wait function * *************************************************/ +#ifdef _POSIX_MONOTONIC_CLOCK +# ifdef CLOCK_BOOTTIME +# define EXIM_CLOCKTYPE CLOCK_BOOTTIME +# else +# define EXIM_CLOCKTYPE CLOCK_MONOTONIC +# endif + +/* Amount EXIM_CLOCK is behind realtime, at startup. */ +static struct timespec offset_ts; + +static void +exim_clock_init(void) +{ +struct timeval tv; +if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return; +(void)gettimeofday(&tv, NULL); +offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec; +offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec; +if (offset_ts.tv_nsec >= 0) return; +offset_ts.tv_sec--; +offset_ts.tv_nsec += 1000*1000*1000; +} +#endif + + +void +exim_gettime(struct timeval * tv) +{ +#ifdef _POSIX_MONOTONIC_CLOCK +struct timespec now_ts; + +if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0) + { + now_ts.tv_sec += offset_ts.tv_sec; + if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000) + { + now_ts.tv_sec++; + now_ts.tv_nsec -= 1000*1000*1000; + } + tv->tv_sec = now_ts.tv_sec; + tv->tv_usec = now_ts.tv_nsec / 1000; + } +else +#endif + (void)gettimeofday(tv, NULL); +} + + /* Exim uses a time + a pid to generate a unique identifier in two places: its message IDs, and in file names for maildir deliveries. Because some OS now re-use pids within the same second, sub-second times are now being used. -However, for absolute certaintly, we must ensure the clock has ticked before +However, for absolute certainty, we must ensure the clock has ticked before allowing the relevant process to complete. At the time of implementation of this code (February 2003), the speed of processors is such that the clock will invariably have ticked already by the time a process has done its job. This @@ -356,9 +541,10 @@ function prepares for the time when things are faster - and it also copes with clocks that go backwards. Arguments: - then_tv A timeval which was used to create uniqueness; its usec field + prev_tv A timeval which was used to create uniqueness; its usec field has been rounded down to the value of the resolution. We want to be sure the current time is greater than this. + On return, updated to current (rounded down). resolution The resolution that was used to divide the microseconds (1 for maildir, larger for message ids) @@ -366,26 +552,26 @@ Returns: nothing */ void -exim_wait_tick(struct timeval *then_tv, int resolution) +exim_wait_tick(struct timeval * prev_tv, int resolution) { struct timeval now_tv; long int now_true_usec; -(void)gettimeofday(&now_tv, NULL); +exim_gettime(&now_tv); now_true_usec = now_tv.tv_usec; now_tv.tv_usec = (now_true_usec/resolution) * resolution; -if (exim_tvcmp(&now_tv, then_tv) <= 0) +while (exim_tvcmp(&now_tv, prev_tv) <= 0) { struct itimerval itval; itval.it_interval.tv_sec = 0; itval.it_interval.tv_usec = 0; - itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec; - itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec; + itval.it_value.tv_sec = prev_tv->tv_sec - now_tv.tv_sec; + itval.it_value.tv_usec = prev_tv->tv_usec + resolution - now_true_usec; /* We know that, overall, "now" is less than or equal to "then". Therefore, a negative value for the microseconds is possible only in the case when "now" - is more than a second less than "then". That means that itval.it_value.tv_sec + is more than a second less than "tgt". That means that itval.it_value.tv_sec is greater than zero. The following correction is therefore safe. */ if (itval.it_value.tv_usec < 0) @@ -396,17 +582,26 @@ if (exim_tvcmp(&now_tv, then_tv) <= 0) DEBUG(D_transport|D_receive) { - if (!running_in_test_harness) + if (!f.running_in_test_harness) { - debug_printf("tick check: %lu.%06lu %lu.%06lu\n", - then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec); - debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec, - itval.it_value.tv_usec); + debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n", + prev_tv->tv_sec, (long) prev_tv->tv_usec, + now_tv.tv_sec, (long) now_tv.tv_usec); + debug_printf("waiting " TIME_T_FMT ".%06lu sec\n", + itval.it_value.tv_sec, (long) itval.it_value.tv_usec); } } milliwait(&itval); + + /* Be prapared to go around if the kernel does not implement subtick + granularity (GNU Hurd) */ + + exim_gettime(&now_tv); + now_true_usec = now_tv.tv_usec; + now_tv.tv_usec = (now_true_usec/resolution) * resolution; } +*prev_tv = now_tv; } @@ -442,8 +637,6 @@ return f; } - - /************************************************* * Ensure stdin, stdout, and stderr exist * *************************************************/ @@ -465,16 +658,15 @@ Returns: Nothing void exim_nullstd(void) { -int i; int devnull = -1; struct stat statbuf; -for (i = 0; i <= 2; i++) +for (int i = 0; i <= 2; i++) { if (fstat(i, &statbuf) < 0 && errno == EBADF) { if (devnull < 0) devnull = open("/dev/null", O_RDWR); if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", - string_open_failed(errno, "/dev/null")); + string_open_failed("/dev/null", NULL)); if (devnull != i) (void)dup2(devnull, i); } } @@ -525,9 +717,9 @@ close_unwanted(void) { if (smtp_input) { - #ifdef SUPPORT_TLS - tls_close(TRUE, FALSE); /* Shut down the TLS library */ - #endif +#ifndef DISABLE_TLS + tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */ +#endif (void)close(fileno(smtp_in)); (void)close(fileno(smtp_out)); smtp_in = NULL; @@ -538,7 +730,7 @@ else if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */ if (debug_selector == 0) /* stderr */ { - if (!synchronous_delivery) + if (!f.synchronous_delivery) { (void)close(2); log_stderr = NULL; @@ -571,7 +763,7 @@ Returns: nothing; bombs out on failure */ void -exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg) +exim_setugid(uid_t uid, gid_t gid, BOOL igflag, const uschar * msg) { uid_t euid = geteuid(); gid_t egid = getegid(); @@ -584,21 +776,18 @@ if (euid == root_uid || euid != uid || egid != gid || igflag) if (igflag) { struct passwd *pw = getpwuid(uid); - if (pw != NULL) - { - if (initgroups(pw->pw_name, gid) != 0) - log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s", - (long int)uid, strerror(errno)); - } - else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): " - "no passwd entry for uid=%ld", (long int)uid); + if (!pw) + log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): " + "no passwd entry for uid=%ld", (long int)uid); + + if (initgroups(pw->pw_name, gid) != 0) + log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s", + (long int)uid, strerror(errno)); } if (setgid(gid) < 0 || setuid(uid) < 0) - { log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld " "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg); - } } /* Debugging output included uid/gid and all groups */ @@ -606,17 +795,14 @@ if (euid == root_uid || euid != uid || egid != gid || igflag) DEBUG(D_uid) { int group_count, save_errno; - gid_t group_list[NGROUPS_MAX]; + gid_t group_list[EXIM_GROUPLIST_SIZE]; debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg, (long int)geteuid(), (long int)getegid(), (long int)getpid()); - group_count = getgroups(NGROUPS_MAX, group_list); + group_count = getgroups(nelem(group_list), group_list); save_errno = errno; debug_printf(" auxiliary group list:"); if (group_count > 0) - { - int i; - for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]); - } + for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]); else if (group_count < 0) debug_printf(" ", strerror(save_errno)); else debug_printf(" "); @@ -644,13 +830,110 @@ void exim_exit(int rc) { search_tidyup(); +store_exit(); DEBUG(D_any) - debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d " - ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc); + debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d " + ">>>>>>>>>>>>>>>>\n", + (int)getpid(), process_purpose, rc); exit(rc); } +void +exim_underbar_exit(int rc) +{ +store_exit(); +DEBUG(D_any) + debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d " + ">>>>>>>>>>>>>>>>\n", + (int)getpid(), process_purpose, rc); +_exit(rc); +} + + + +/* Print error string, then die */ +static void +exim_fail(const char * fmt, ...) +{ +va_list ap; +va_start(ap, fmt); +vfprintf(stderr, fmt, ap); +va_end(ap); +exit(EXIT_FAILURE); +} + +/* fail if a length is too long */ +static inline void +exim_len_fail_toolong(int itemlen, int maxlen, const char * description) +{ +if (itemlen <= maxlen) + return; +fprintf(stderr, "exim: length limit exceeded (%d > %d) for: %s\n", + itemlen, maxlen, description); +exit(EXIT_FAILURE); +} + +/* only pass through the string item back to the caller if it's short enough */ +static inline const uschar * +exim_str_fail_toolong(const uschar * item, int maxlen, const char * description) +{ +if (!item) + exim_fail("exim: bad item for: %s\n", description); +exim_len_fail_toolong(Ustrlen(item), maxlen, description); +return item; +} + +/* as above, copying as tainted */ +static inline const uschar * +exim_arg_copy(const uschar * item, int maxlen, const char * description) +{ +return string_copy_taint(exim_str_fail_toolong(item, maxlen, description), + GET_TAINTED); +} + +/* exim_chown_failure() called from exim_chown()/exim_fchown() on failure +of chown()/fchown(). See src/functions.h for more explanation */ +int +exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group) +{ +int saved_errno = errno; /* from the preceeding chown call */ +#if 1 +log_write(0, LOG_MAIN|LOG_PANIC, + __FILE__ ":%d: chown(%s, %d:%d) failed (%s)." + " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391", + __LINE__, name?name:US"", owner, group, strerror(errno)); +#else +/* I leave this here, commented, in case the "bug"(?) comes up again. + It is not an Exim bug, but we can provide a workaround. + See Bug 2391 + HS 2019-04-18 */ + +struct stat buf; + +if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf))) + { + if (buf.st_uid == owner && buf.st_gid == group) return 0; + log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name); + } +else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno)); + +#endif +errno = saved_errno; +return -1; +} + + +/* Bump the index for argv, checking for overflow, +and return the argument. */ + +static const uschar * +next_argv(const uschar ** argv, int * pi, int argc, const uschar * where) +{ +int i = *pi; +if (++i >= argc) exim_fail("exim: bad item for: %s\n", where); +return argv[*pi = i]; +} /************************************************* @@ -673,10 +956,7 @@ check_port(uschar *address) { int port = host_address_extract_port(address); if (string_is_ip_address(address, NULL) == 0) - { - fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address); - exit(EXIT_FAILURE); - } + exim_fail("exim abandoned: \"%s\" is not an IP address\n", address); return port; } @@ -705,7 +985,7 @@ int start, end, domain; uschar *parse_error = NULL; uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain, FALSE); -if (address == NULL) +if (!address) { fprintf(stdout, "syntax error: %s\n", parse_error); *exit_value = 2; @@ -715,7 +995,7 @@ else int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1, -1, -1, NULL, NULL, NULL); if (rc == FAIL) *exit_value = 2; - else if (rc == DEFER && *exit_value == 0) *exit_value = 1; + else if (rc == DEFER && *exit_value == 0) *exit_value = 1; } } @@ -725,320 +1005,470 @@ else * Show supported features * *************************************************/ -/* This function is called for -bV/--version and for -d to output the optional -features of the current Exim binary. - -Arguments: a FILE for printing -Returns: nothing -*/ - static void -show_whats_supported(FILE *f) +show_string(BOOL is_stdout, gstring * g) { - auth_info *authi; +const uschar * s = string_from_gstring(g); +if (s) + if (is_stdout) fputs(CCS s, stdout); + else debug_printf("%s", s); +} + +static gstring * +show_db_version(gstring * g) +{ +g = string_cat(g, US"Hints DB:\n"); #ifdef DB_VERSION_STRING -fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING); +DEBUG(D_any) + { + g = string_fmt_append(g, " Library version: BDB: Compile: %s\n", DB_VERSION_STRING); + g = string_fmt_append(g, " Runtime: %s\n", + db_version(NULL, NULL, NULL)); + } +else + g = string_fmt_append(g, " Berkeley DB: %s\n", DB_VERSION_STRING); + #elif defined(BTREEVERSION) && defined(HASHVERSION) - #ifdef USE_DB - fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n"); - #else - fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n"); - #endif +# ifdef USE_DB + g = string_cat(g, US" Probably Berkeley DB version 1.8x (native mode)\n"); +# else + g = string_cat(g, US" Probably Berkeley DB version 1.8x (compatibility mode)\n"); +# endif + #elif defined(_DBM_RDONLY) || defined(dbm_dirfno) -fprintf(f, "Probably ndbm\n"); +g = string_cat(g, US" Probably ndbm\n"); +#elif defined(USE_SQLITE) +g = string_cat(g, US" Using sqlite3\n"); #elif defined(USE_TDB) -fprintf(f, "Using tdb\n"); +g = string_cat(g, US" Using tdb\n"); #else - #ifdef USE_GDBM - fprintf(f, "Probably GDBM (native mode)\n"); - #else - fprintf(f, "Probably GDBM (compatibility mode)\n"); - #endif +# ifdef USE_GDBM +g = string_cat(g, US" Probably GDBM (native mode)\n"); +# else +g = string_cat(g, US" Probably GDBM (compatibility mode)\n"); +# endif #endif +return g; +} -fprintf(f, "Support for:"); -#ifdef SUPPORT_CRYPTEQ - fprintf(f, " crypteq"); + +static gstring * +lookup_show_supported(gstring * g) +{ +gstring * b = NULL, * d = NULL; + +#ifdef LOOKUP_LSEARCH +# if LOOKUP_LSEARCH!=2 + b = string_cat(b, US" lsearch wildlsearch nwildlsearch iplsearch"); +# else + d = string_cat(d, US" lsearch wildlsearch nwildlsearch iplsearch"); +# endif #endif -#if HAVE_ICONV - fprintf(f, " iconv()"); +#ifdef LOOKUP_CDB +# if LOOKUP_CDB!=2 + b = string_cat(b, US" cdb"); +# else + d = string_cat(d, US" cdb"); +# endif #endif -#if HAVE_IPV6 - fprintf(f, " IPv6"); +#ifdef LOOKUP_DBM +# if LOOKUP_DBM!=2 + b = string_cat(b, US" dbm dbmjz dbmnz"); +# else + d = string_cat(d, US" dbm dbmjz dbmnz"); +# endif #endif -#ifdef HAVE_SETCLASSRESOURCES - fprintf(f, " use_setclassresources"); +#ifdef LOOKUP_DNSDB +# if LOOKUP_DNSDB!=2 + b = string_cat(b, US" dnsdb"); +# else + d = string_cat(d, US" dnsdb"); +# endif #endif -#ifdef SUPPORT_PAM - fprintf(f, " PAM"); +#ifdef LOOKUP_DSEARCH +# if LOOKUP_DSEARCH!=2 + b = string_cat(b, US" dsearch"); +# else + d = string_cat(d, US" dsearch"); +# endif #endif -#ifdef EXIM_PERL - fprintf(f, " Perl"); +#ifdef LOOKUP_IBASE +# if LOOKUP_IBASE!=2 + b = string_cat(b, US" ibase"); +# else + d = string_cat(d, US" ibase"); +# endif #endif -#ifdef EXPAND_DLFUNC - fprintf(f, " Expand_dlfunc"); +#ifdef LOOKUP_JSON +# if LOOKUP_JSON!=2 + b = string_cat(b, US" json"); +# else + d = string_cat(d, US" json"); +# endif #endif -#ifdef USE_TCP_WRAPPERS - fprintf(f, " TCPwrappers"); +#ifdef LOOKUP_LDAP +# if LOOKUP_LDAP!=2 + b = string_cat(b, US" ldap ldapdn ldapm"); +# else + d = string_cat(d, US" ldap ldapdn ldapm"); +# endif #endif -#ifdef SUPPORT_TLS - #ifdef USE_GNUTLS - fprintf(f, " GnuTLS"); - #else - fprintf(f, " OpenSSL"); - #endif +#ifdef LOOKUP_LMDB +# if LOOKUP_LMDB!=2 + b = string_cat(b, US" lmdb"); +# else + d = string_cat(d, US" lmdb"); +# endif #endif -#ifdef SUPPORT_TRANSLATE_IP_ADDRESS - fprintf(f, " translate_ip_address"); +#ifdef LOOKUP_MYSQL +# if LOOKUP_MYSQL!=2 + b = string_cat(b, US" mysql"); +# else + d = string_cat(d, US" mysql"); +# endif #endif -#ifdef SUPPORT_MOVE_FROZEN_MESSAGES - fprintf(f, " move_frozen_messages"); +#ifdef LOOKUP_NIS +# if LOOKUP_NIS!=2 + b = string_cat(b, US" nis nis0"); +# else + d = string_cat(d, US" nis nis0"); +# endif #endif -#ifdef WITH_CONTENT_SCAN - fprintf(f, " Content_Scanning"); +#ifdef LOOKUP_NISPLUS +# if LOOKUP_NISPLUS!=2 + b = string_cat(b, US" nisplus"); +# else + d = string_cat(d, US" nisplus"); +# endif #endif -#ifndef DISABLE_DKIM - fprintf(f, " DKIM"); +#ifdef LOOKUP_ORACLE +# if LOOKUP_ORACLE!=2 + b = string_cat(b, US" oracle"); +# else + d = string_cat(d, US" oracle"); +# endif #endif -#ifdef WITH_OLD_DEMIME - fprintf(f, " Old_Demime"); +#ifdef LOOKUP_PASSWD +# if LOOKUP_PASSWD!=2 + b = string_cat(b, US" passwd"); +# else + d = string_cat(d, US" passwd"); +# endif #endif -#ifdef EXPERIMENTAL_SPF - fprintf(f, " Experimental_SPF"); +#ifdef LOOKUP_PGSQL +# if LOOKUP_PGSQL!=2 + b = string_cat(b, US" pgsql"); +# else + d = string_cat(d, US" pgsql"); +# endif #endif -#ifdef EXPERIMENTAL_SRS - fprintf(f, " Experimental_SRS"); +#ifdef LOOKUP_REDIS +# if LOOKUP_REDIS!=2 + b = string_cat(b, US" redis"); +# else + d = string_cat(d, US" redis"); +# endif #endif -#ifdef EXPERIMENTAL_BRIGHTMAIL - fprintf(f, " Experimental_Brightmail"); +#ifdef SUPPORT_SPF +# if SUPPORT_SPF!=2 + b = string_cat(b, US" spf"); +# else + d = string_cat(d, US" spf"); +# endif #endif -#ifdef EXPERIMENTAL_DCC - fprintf(f, " Experimental_DCC"); +#ifdef LOOKUP_SQLITE +# if LOOKUP_SQLITE!=2 + b = string_cat(b, US" sqlite"); +# else + d = string_cat(d, US" sqlite"); +# endif #endif -#ifdef EXPERIMENTAL_DMARC - fprintf(f, " Experimental_DMARC"); +#ifdef LOOKUP_TESTDB +# if LOOKUP_TESTDB!=2 + b = string_cat(b, US" testdb"); +# else + d = string_cat(d, US" testdb"); +# endif #endif -#ifdef EXPERIMENTAL_OCSP - fprintf(f, " Experimental_OCSP"); +#ifdef LOOKUP_WHOSON +# if LOOKUP_WHOSON!=2 + b = string_cat(b, US" whoson"); +# else + d = string_cat(d, US" whoson"); +# endif #endif -#ifdef EXPERIMENTAL_PRDR - fprintf(f, " Experimental_PRDR"); + +if (b) g = string_fmt_append(g, "Lookups (built-in):%Y\n", b); +if (d) g = string_fmt_append(g, "Lookups (dynamic): %Y\n", d); +return g; +} + + +static void +lookup_version_report_cb(uschar * name, uschar * ptr, void * ctx) +{ +const lookup_info * li = (lookup_info *)ptr; +gstring ** gp = ctx; + +if (li->version_report) + *gp = li->version_report(*gp); +} + + +/* This function is called for -bV/--version and for -d to output the optional +features of the current Exim binary. + +Arguments: BOOL, true for stdout else debug channel +Returns: nothing +*/ + +static void +show_whats_supported(BOOL is_stdout) +{ +rmark reset_point = store_mark(); +gstring * g = NULL; + +DEBUG(D_any) {} else g = show_db_version(g); + +g = string_cat(g, US"Support for:"); +#ifdef WITH_CONTENT_SCAN + g = string_cat(g, US" Content_Scanning"); #endif -#ifdef EXPERIMENTAL_PROXY - fprintf(f, " Experimental_Proxy"); +#ifndef DISABLE_EXIM_FILTER + g = string_cat(g, US" Exim_filter"); #endif -#ifdef EXPERIMENTAL_TPDA - fprintf(f, " Experimental_TPDA"); +#ifndef DISABLE_SIEVE_FILTER + g = string_cat(g, US" Sieve_filter"); #endif -#ifdef EXPERIMENTAL_REDIS - fprintf(f, " Experimental_Redis"); +#ifdef SUPPORT_CRYPTEQ + g = string_cat(g, US" crypteq"); #endif -fprintf(f, "\n"); - -fprintf(f, "Lookups (built-in):"); -#if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2 - fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch"); +#ifdef EXPAND_DLFUNC + g = string_cat(g, US" Expand_dlfunc"); #endif -#if defined(LOOKUP_CDB) && LOOKUP_CDB!=2 - fprintf(f, " cdb"); +#if HAVE_ICONV + g = string_cat(g, US" iconv()"); #endif -#if defined(LOOKUP_DBM) && LOOKUP_DBM!=2 - fprintf(f, " dbm dbmjz dbmnz"); +#if HAVE_IPV6 + g = string_cat(g, US" IPv6"); +#endif +#ifdef SUPPORT_PAM + g = string_cat(g, US" PAM"); +#endif +#ifdef EXIM_PERL + g = string_cat(g, US" Perl"); +#endif +#ifdef USE_GNUTLS + g = string_cat(g, US" GnuTLS"); #endif -#if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2 - fprintf(f, " dnsdb"); +#ifdef SUPPORT_MOVE_FROZEN_MESSAGES + g = string_cat(g, US" move_frozen_messages"); #endif -#if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2 - fprintf(f, " dsearch"); +#ifdef USE_OPENSSL + g = string_cat(g, US" OpenSSL"); #endif -#if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2 - fprintf(f, " ibase"); +#if defined(CYRUS_PWCHECK_SOCKET) + g = string_cat(g, US" pwcheck"); #endif -#if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2 - fprintf(f, " ldap ldapdn ldapm"); +#if defined(RADIUS_CONFIG_FILE) + g = string_cat(g, US" radius"); #endif -#if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2 - fprintf(f, " mysql"); +#ifndef DISABLE_TLS_RESUME + g = string_cat(g, US" TLS_resume"); #endif -#if defined(LOOKUP_NIS) && LOOKUP_NIS!=2 - fprintf(f, " nis nis0"); +#ifdef SUPPORT_TRANSLATE_IP_ADDRESS + g = string_cat(g, US" translate_ip_address"); #endif -#if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2 - fprintf(f, " nisplus"); +#ifdef USE_TCP_WRAPPERS + g = string_cat(g, US" TCPwrappers"); #endif -#if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2 - fprintf(f, " oracle"); +#ifdef HAVE_SETCLASSRESOURCES + g = string_cat(g, US" use_setclassresources"); #endif -#if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2 - fprintf(f, " passwd"); +#ifdef SUPPORT_DANE + g = string_cat(g, US" DANE"); #endif -#if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2 - fprintf(f, " pgsql"); +#ifndef DISABLE_DKIM + g = string_cat(g, US" DKIM"); #endif -#if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2 - fprintf(f, " sqlite"); +#ifdef SUPPORT_DMARC + g = string_cat(g, US" DMARC"); #endif -#if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2 - fprintf(f, " testdb"); +#ifndef DISABLE_DNSSEC + g = string_cat(g, US" DNSSEC"); #endif -#if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2 - fprintf(f, " whoson"); +#ifndef DISABLE_ESMTP_LIMITS + g = string_cat(g, US" ESMTP_Limits"); #endif -fprintf(f, "\n"); - -fprintf(f, "Authenticators:"); -#ifdef AUTH_CRAM_MD5 - fprintf(f, " cram_md5"); +#ifndef DISABLE_WELLKNOWN + g = string_cat(g, US" ESMTP_Wellknown"); #endif -#ifdef AUTH_CYRUS_SASL - fprintf(f, " cyrus_sasl"); +#ifndef DISABLE_EVENT + g = string_cat(g, US" Event"); #endif -#ifdef AUTH_DOVECOT - fprintf(f, " dovecot"); +#ifdef SUPPORT_I18N + g = string_cat(g, US" I18N"); #endif -#ifdef AUTH_GSASL - fprintf(f, " gsasl"); +#ifndef DISABLE_OCSP + g = string_cat(g, US" OCSP"); #endif -#ifdef AUTH_HEIMDAL_GSSAPI - fprintf(f, " heimdal_gssapi"); +#ifndef DISABLE_PIPE_CONNECT + g = string_cat(g, US" PIPECONNECT"); #endif -#ifdef AUTH_PLAINTEXT - fprintf(f, " plaintext"); +#ifndef DISABLE_PRDR + g = string_cat(g, US" PRDR"); #endif -#ifdef AUTH_SPA - fprintf(f, " spa"); +#ifdef SUPPORT_PROXY + g = string_cat(g, US" PROXY"); #endif -fprintf(f, "\n"); - -fprintf(f, "Routers:"); -#ifdef ROUTER_ACCEPT - fprintf(f, " accept"); +#ifndef DISABLE_QUEUE_RAMP + g = string_cat(g, US" Queue_Ramp"); #endif -#ifdef ROUTER_DNSLOOKUP - fprintf(f, " dnslookup"); +#ifdef SUPPORT_SOCKS + g = string_cat(g, US" SOCKS"); #endif -#ifdef ROUTER_IPLITERAL - fprintf(f, " ipliteral"); +#ifdef SUPPORT_SPF + g = string_cat(g, US" SPF"); #endif -#ifdef ROUTER_IPLOOKUP - fprintf(f, " iplookup"); +#if defined(SUPPORT_SRS) + g = string_cat(g, US" SRS"); #endif -#ifdef ROUTER_MANUALROUTE - fprintf(f, " manualroute"); +#ifdef TCP_FASTOPEN + tcp_init(); + if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open"); #endif -#ifdef ROUTER_QUERYPROGRAM - fprintf(f, " queryprogram"); +#ifdef EXPERIMENTAL_ARC + g = string_cat(g, US" Experimental_ARC"); #endif -#ifdef ROUTER_REDIRECT - fprintf(f, " redirect"); +#ifdef EXPERIMENTAL_BRIGHTMAIL + g = string_cat(g, US" Experimental_Brightmail"); #endif -fprintf(f, "\n"); - -fprintf(f, "Transports:"); -#ifdef TRANSPORT_APPENDFILE - fprintf(f, " appendfile"); - #ifdef SUPPORT_MAILDIR - fprintf(f, "/maildir"); - #endif - #ifdef SUPPORT_MAILSTORE - fprintf(f, "/mailstore"); - #endif - #ifdef SUPPORT_MBX - fprintf(f, "/mbx"); - #endif +#ifdef EXPERIMENTAL_DCC + g = string_cat(g, US" Experimental_DCC"); #endif -#ifdef TRANSPORT_AUTOREPLY - fprintf(f, " autoreply"); +#ifdef EXPERIMENTAL_DSN_INFO + g = string_cat(g, US" Experimental_DSN_info"); #endif -#ifdef TRANSPORT_LMTP - fprintf(f, " lmtp"); +#ifdef EXPERIMENTAL_QUEUEFILE + g = string_cat(g, US" Experimental_QUEUEFILE"); #endif -#ifdef TRANSPORT_PIPE - fprintf(f, " pipe"); +#ifdef EXPERIMENTAL_XCLIENT + g = string_cat(g, US" Experimental_XCLIENT"); #endif -#ifdef TRANSPORT_SMTP - fprintf(f, " smtp"); +g = string_cat(g, US"\n"); + +g = lookup_show_supported(g); +g = auth_show_supported(g); +g = route_show_supported(g); +g = transport_show_supported(g); + +#ifdef WITH_CONTENT_SCAN +g = malware_show_supported(g); #endif -fprintf(f, "\n"); +show_string(is_stdout, g); g = NULL; if (fixed_never_users[0] > 0) { int i; - fprintf(f, "Fixed never_users: "); + g = string_cat(g, US"Fixed never_users: "); for (i = 1; i <= (int)fixed_never_users[0] - 1; i++) - fprintf(f, "%d:", (unsigned int)fixed_never_users[i]); - fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]); + string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]); + g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]); } -fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t)); +g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid); + +g = string_fmt_append(g, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t)); /* Everything else is details which are only worth reporting when debugging. Perhaps the tls_version_report should move into this too. */ -DEBUG(D_any) do { - - int i; +DEBUG(D_any) + { /* clang defines __GNUC__ (at least, for me) so test for it first */ #if defined(__clang__) - fprintf(f, "Compiler: CLang [%s]\n", __clang_version__); + g = string_fmt_append(g, "Compiler: CLang [%s]\n", __clang_version__); #elif defined(__GNUC__) - fprintf(f, "Compiler: GCC [%s]\n", # ifdef __VERSION__ - __VERSION__ + g = string_fmt_append(g, "Compiler: GCC [%s]\n", __VERSION__); # else - "? unknown version ?" + g = string_fmt_append(g, "Compiler: GCC [%s]\n", "? unknown version ?"); # endif - ); #else - fprintf(f, "Compiler: \n"); + g = string_cat(g, US"Compiler: \n"); #endif -#ifdef SUPPORT_TLS - tls_version_report(f); +#if defined(__GLIBC__) && !defined(__UCLIBC__) + g = string_fmt_append(g, "Library version: Glibc: Compile: %d.%d\n", + __GLIBC__, __GLIBC_MINOR__); + if (__GLIBC_PREREQ(2, 1)) + g = string_fmt_append(g, " Runtime: %s\n", + gnu_get_libc_version()); #endif - for (authi = auths_available; *authi->driver_name != '\0'; ++authi) { - if (authi->version_report) { - (*authi->version_report)(f); - } - } + g = show_db_version(g); + +#ifndef DISABLE_TLS + g = tls_version_report(g); +#endif +#ifdef SUPPORT_I18N + g = utf8_version_report(g); +#endif + +/*XXX do we need a "show misc-mods version-report" ? +Currently they are output in misc_mod_add() */ + + show_string(is_stdout, g); + g = NULL; + + for (auth_info * ai = auths_available; ai; ai = (auth_info *)ai->drinfo.next) + if (ai->version_report) + g = (*ai->version_report)(g); /* PCRE_PRERELEASE is either defined and empty or a bare sequence of characters; unless it's an ancient version of PCRE in which case it is not defined. */ #ifndef PCRE_PRERELEASE -#define PCRE_PRERELEASE +# define PCRE_PRERELEASE #endif #define QUOTE(X) #X #define EXPAND_AND_QUOTE(X) QUOTE(X) - fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n" - " Runtime: %s\n", - PCRE_MAJOR, PCRE_MINOR, - EXPAND_AND_QUOTE(PCRE_PRERELEASE) "", - pcre_version()); + { + uschar buf[24]; + pcre2_config(PCRE2_CONFIG_VERSION, buf); + g = string_fmt_append(g, "Library version: PCRE2: Compile: %d.%d%s\n" + " Runtime: %s\n", + PCRE2_MAJOR, PCRE2_MINOR, + EXPAND_AND_QUOTE(PCRE2_PRERELEASE) "", + buf); + } #undef QUOTE #undef EXPAND_AND_QUOTE + show_string(is_stdout, g); + g = NULL; + init_lookup_list(); - for (i = 0; i < lookup_list_count; i++) - { - if (lookup_list[i]->version_report) - lookup_list[i]->version_report(f); - } + tree_walk(lookups_tree, lookup_version_report_cb, &g); + show_string(is_stdout, g); + g = NULL; + init_misc_mod_list(); #ifdef WHITELIST_D_MACROS - fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS); + g = string_fmt_append(g, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS); #else - fprintf(f, "WHITELIST_D_MACROS unset\n"); + g = string_cat(g, US"WHITELIST_D_MACROS unset\n"); #endif #ifdef TRUSTED_CONFIG_LIST - fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST); + g = string_fmt_append(g, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST); #else - fprintf(f, "TRUSTED_CONFIG_LIST unset\n"); + g = string_cat(g, US"TRUSTED_CONFIG_LIST unset\n"); #endif + } -} while (0); +show_string(is_stdout, g); +store_reset(reset_point); } @@ -1049,8 +1479,6 @@ DEBUG(D_any) do { static void show_exim_information(enum commandline_info request, FILE *stream) { -const uschar **pp; - switch(request) { case CMDINFO_NONE: @@ -1062,13 +1490,19 @@ switch(request) "If the string is not recognised, you'll get this help (on stderr).\n" "\n" " exim -bI:help this information\n" -" exim -bI:dscp dscp value keywords known\n" -" exim -bI:sieve list of supported sieve extensions, one per line.\n" +" exim -bI:dscp list of known dscp value keywords\n" +" exim -bI:sieve list of supported sieve extensions\n" ); return; case CMDINFO_SIEVE: - for (pp = exim_sieve_extension_list; *pp; ++pp) - fprintf(stream, "%s\n", *pp); + { + const misc_module_info * mi; + typedef void (*fn_t)(FILE *); + if ((mi = misc_mod_find(US"sieve_filter", NULL))) + (((fn_t *) mi->functions)[SIEVE_EXTENSIONS]) (stream); + else + fprintf(stream, "Sieve filtering not available\n"); + } return; case CMDINFO_DSCP: dscp_list_to_stream(stream); @@ -1089,42 +1523,36 @@ Argument: the local part Returns: the local part, quoted if necessary */ -uschar * -local_part_quote(uschar *lpart) +const uschar * +local_part_quote(const uschar * lpart) { BOOL needs_quote = FALSE; -int size, ptr; -uschar *yield; -uschar *t; +gstring * g; -for (t = lpart; !needs_quote && *t != 0; t++) - { +for (const uschar * t = lpart; !needs_quote && *t; t++) needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL && (*t != '.' || t == lpart || t[1] == 0); - } if (!needs_quote) return lpart; -size = ptr = 0; -yield = string_cat(NULL, &size, &ptr, US"\"", 1); +g = string_catn(NULL, US"\"", 1); for (;;) { - uschar *nq = US Ustrpbrk(lpart, "\\\""); - if (nq == NULL) + uschar * nq = US Ustrpbrk(lpart, "\\\""); + if (!nq) { - yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart)); + g = string_cat(g, lpart); break; } - yield = string_cat(yield, &size, &ptr, lpart, nq - lpart); - yield = string_cat(yield, &size, &ptr, US"\\", 1); - yield = string_cat(yield, &size, &ptr, nq, 1); + g = string_catn(g, lpart, nq - lpart); + g = string_catn(g, US"\\", 1); + g = string_catn(g, nq, 1); lpart = nq + 1; } -yield = string_cat(yield, &size, &ptr, US"\"", 1); -yield[ptr] = 0; -return yield; +g = string_catn(g, US"\"", 1); +return string_from_gstring(g); } @@ -1155,9 +1583,9 @@ void *dlhandle; void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY); dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW); -if (dlhandle_curses != NULL) dlclose(dlhandle_curses); +if (dlhandle_curses) dlclose(dlhandle_curses); -if (dlhandle != NULL) +if (dlhandle) { /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are: * char * readline (const char *prompt); @@ -1167,9 +1595,7 @@ if (dlhandle != NULL) *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history"); } else - { DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror()); - } return dlhandle; } @@ -1196,62 +1622,59 @@ Returns: pointer to dynamic memory, or NULL at end of file static uschar * get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *)) { -int i; -int size = 0; -int ptr = 0; -uschar *yield = NULL; +gstring * g = NULL; +BOOL had_input = FALSE; -if (fn_readline == NULL) { printf("> "); fflush(stdout); } +if (!fn_readline) { printf("> "); fflush(stdout); } -for (i = 0;; i++) +for (int i = 0;; i++) { uschar buffer[1024]; - uschar *p, *ss; + uschar * p, * ss; - #ifdef USE_READLINE +#ifdef USE_READLINE char *readline_line = NULL; - if (fn_readline != NULL) + if (fn_readline) { - if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break; - if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line); + if (!(readline_line = fn_readline((i > 0)? "":"> "))) break; + if (*readline_line && fn_addhist) fn_addhist(readline_line); p = US readline_line; } else - #endif +#endif /* readline() not in use */ { - if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break; + if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break; /*EOF*/ p = buffer; } /* Handle the line */ - ss = p + (int)Ustrlen(p); - while (ss > p && isspace(ss[-1])) ss--; + had_input = TRUE; + ss = p + Ustrlen(p); + while (ss > p && isspace(ss[-1])) ss--; /* strip trailing newline (and spaces) */ if (i > 0) - { - while (p < ss && isspace(*p)) p++; /* leading space after cont */ - } + while (p < ss && isspace(*p)) p++; /* strip leading space after cont */ - yield = string_cat(yield, &size, &ptr, p, ss - p); + g = string_catn(g, p, ss - p); - #ifdef USE_READLINE - if (fn_readline != NULL) free(readline_line); - #endif +#ifdef USE_READLINE + if (fn_readline) free(readline_line); +#endif - if (ss == p || yield[ptr-1] != '\\') - { - yield[ptr] = 0; + /* g can only be NULL if ss==p */ + if (ss == p || gstring_last_char(g) != '\\') /* not continuation; done */ break; - } - yield[--ptr] = 0; + + gstring_trim(g, 1); /* drop the \ */ } -if (yield == NULL) printf("\n"); -return yield; +if (had_input) return g ? string_from_gstring(g) : US""; +printf("\n"); +return NULL; } @@ -1270,25 +1693,20 @@ Returns: DOES NOT RETURN */ static void -exim_usage(uschar *progname) +exim_usage(const uschar * progname) { -/* Handle specific program invocation varients */ +/* Handle specific program invocation variants */ if (Ustrcmp(progname, US"-mailq") == 0) - { - fprintf(stderr, + exim_fail( "mailq - list the contents of the mail queue\n\n" "For a list of options, see the Exim documentation.\n"); - exit(EXIT_FAILURE); - } /* Generic usage - we output this whatever happens */ -fprintf(stderr, +exim_fail( "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n" "not directly from a shell command line. Options and/or arguments control\n" "what it does when called. For a list of options, see the Exim documentation.\n"); - -exit(EXIT_FAILURE); } @@ -1300,22 +1718,21 @@ exit(EXIT_FAILURE); /* Typically, Exim will drop privileges if macros are supplied. In some cases, we want to not do so. -Arguments: none (macros is a global) +Arguments: opt_D_used - true if the commandline had a "-D" option Returns: true if trusted, false otherwise */ static BOOL -macros_trusted(void) +macros_trusted(BOOL opt_D_used) { #ifdef WHITELIST_D_MACROS -macro_item *m; -uschar *whitelisted, *end, *p, **whites, **w; +uschar *whitelisted, *end, *p, **whites; int white_count, i, n; size_t len; BOOL prev_char_item, found; #endif -if (macros == NULL) +if (!opt_D_used) return TRUE; #ifndef WHITELIST_D_MACROS return FALSE; @@ -1337,7 +1754,7 @@ if ( ! ((real_uid == root_uid) } /* Get a list of macros which are whitelisted */ -whitelisted = string_copy_malloc(US WHITELIST_D_MACROS); +whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE); prev_char_item = FALSE; white_count = 0; for (p = whitelisted; *p != '\0'; ++p) @@ -1372,11 +1789,12 @@ for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p) } whites[i] = NULL; -/* The list of macros should be very short. Accept the N*M complexity. */ -for (m = macros; m != NULL; m = m->next) +/* The list of commandline macros should be very short. +Accept the N*M complexity. */ +for (macro_item * m = macros_user; m; m = m->next) if (m->command_line) { found = FALSE; - for (w = whites; *w; ++w) + for (uschar ** w = whites; *w; ++w) if (Ustrcmp(*w, m->name) == 0) { found = TRUE; @@ -1384,19 +1802,12 @@ for (m = macros; m != NULL; m = m->next) } if (!found) return FALSE; - if (m->replacement == NULL) + if (!m->replacement) continue; - len = Ustrlen(m->replacement); - if (len == 0) + if ((len = m->replen) == 0) continue; - n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len, - 0, PCRE_EOPT, NULL, 0); - if (n < 0) - { - if (n != PCRE_ERROR_NOMATCH) - debug_printf("macros_trusted checking %s returned %d\n", m->name, n); + if (!regex_match(regex_whitelisted_macro, m->replacement, len, NULL)) return FALSE; - } } DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n"); return TRUE; @@ -1404,6 +1815,77 @@ return TRUE; } +/************************************************* +* Expansion testing * +*************************************************/ + +/* Expand and print one item, doing macro-processing. + +Arguments: + item line for expansion +*/ + +static void +expansion_test_line(const uschar * line) +{ +int len; +BOOL dummy_macexp; +uschar * s; + +Ustrncpy(big_buffer, line, big_buffer_size); +big_buffer[big_buffer_size-1] = '\0'; +len = Ustrlen(big_buffer); + +(void) macros_expand(0, &len, &dummy_macexp); + +#ifdef LOOKUP_MODULE_DIR +//mod_load_check(big_buffer); +#endif + +if (isupper(big_buffer[0])) + { + if (macro_read_assignment(big_buffer)) + printf("Defined macro '%s'\n", mlast->name); + } +else if (Ustrncmp(big_buffer, "set,t ", 6) == 0) + printf("%s\n", acl_standalone_setvar(big_buffer+6, TRUE)); +else if (Ustrncmp(big_buffer, "set ", 4) == 0) + printf("%s\n", acl_standalone_setvar(big_buffer+4, FALSE)); +else + if ((s = expand_string(big_buffer))) printf("%s\n", CS s); + else printf("Failed: %s\n", expand_string_message); +} + + + +/************************************************* +* Queue-runner operations * +*************************************************/ + +/* Prefix a new qrunner descriptor to the qrunners list */ + +static qrunner * +alloc_qrunner(void) +{ +qrunner * q = qrunners; +qrunners = store_get(sizeof(qrunner), GET_UNTAINTED); +memset(qrunners, 0, sizeof(qrunner)); /* default queue, zero interval */ +qrunners->next = q; +qrunners->next_tick = time(NULL); /* run right away */ +return qrunners; +} + +static qrunner * +alloc_onetime_qrunner(void) +{ +qrunners = store_get_perm(sizeof(qrunner), GET_UNTAINTED); +memset(qrunners, 0, sizeof(qrunner)); /* default queue, zero interval */ +qrunners->next_tick = time(NULL); /* run right away */ +qrunners->run_max = 1; +return qrunners; +} + + /************************************************* * Entry point and high-level code * *************************************************/ @@ -1424,9 +1906,9 @@ Returns: EXIT_SUCCESS if terminated successfully */ int -main(int argc, char **cargv) +main(int argc, char ** cargv) { -uschar **argv = USS cargv; +const uschar ** argv = CUSS cargv; int arg_receive_timeout = -1; int arg_smtp_receive_timeout = -1; int arg_error_handling = error_handling; @@ -1434,10 +1916,10 @@ int filter_sfd = -1; int filter_ufd = -1; int group_count; int i, rv; -int list_queue_option = 0; +int list_queue_option = QL_BASIC; int msg_action = 0; int msg_action_arg = -1; -int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]); +int namelen = argv[0] ? Ustrlen(argv[0]) : 0; int queue_only_reason = 0; #ifdef EXIM_PERL int perl_start_option = 0; @@ -1446,6 +1928,7 @@ int recipients_arg = argc; int sender_address_domain = 0; int test_retry_arg = -1; int test_rewrite_arg = -1; +gid_t original_egid; BOOL arg_queue_only = FALSE; BOOL bi_option = FALSE; BOOL checking = FALSE; @@ -1459,9 +1942,10 @@ BOOL f_end_dot = FALSE; BOOL deliver_give_up = FALSE; BOOL list_queue = FALSE; BOOL list_options = FALSE; +BOOL list_config = FALSE; BOOL local_queue_only; -BOOL more = TRUE; BOOL one_msg_action = FALSE; +BOOL opt_D_used = FALSE; BOOL queue_only_set = FALSE; BOOL receiving_message = TRUE; BOOL sender_ident_set = FALSE; @@ -1471,28 +1955,29 @@ BOOL removed_privilege = FALSE; BOOL usage_wanted = FALSE; BOOL verify_address_mode = FALSE; BOOL verify_as_sender = FALSE; +BOOL rcpt_verify_quota = FALSE; BOOL version_printed = FALSE; -uschar *alias_arg = NULL; -uschar *called_as = US""; -uschar *cmdline_syslog_name = NULL; -uschar *start_queue_run_id = NULL; -uschar *stop_queue_run_id = NULL; -uschar *expansion_test_message = NULL; -uschar *ftest_domain = NULL; -uschar *ftest_localpart = NULL; -uschar *ftest_prefix = NULL; -uschar *ftest_suffix = NULL; -uschar *malware_test_file = NULL; -uschar *real_sender_address; -uschar *originator_home = US"/"; +const uschar * alias_arg = NULL; +const uschar * called_as = US""; +const uschar * cmdline_syslog_name = NULL; +const uschar * start_queue_run_id = NULL; +const uschar * stop_queue_run_id = NULL; +const uschar * expansion_test_message = NULL; +const uschar * ftest_domain = NULL; +const uschar * ftest_localpart = NULL; +const uschar * ftest_prefix = NULL; +const uschar * ftest_suffix = NULL; +uschar * log_oneline = NULL; +const uschar * malware_test_file = NULL; +const uschar * real_sender_address; +uschar * originator_home = US"/"; size_t sz; -void *reset_point; struct passwd *pw; struct stat statbuf; pid_t passed_qr_pid = (pid_t)0; int passed_qr_pipe = -1; -gid_t group_list[NGROUPS_MAX]; +gid_t group_list[EXIM_GROUPLIST_SIZE]; /* For the -bI: flag */ enum commandline_info info_flag = CMDINFO_NONE; @@ -1508,6 +1993,13 @@ because some OS define it in /usr/include/unistd.h. */ extern char **environ; +#ifdef MEASURE_TIMING +(void)gettimeofday(×tamp_startup, NULL); +#endif + +store_init(); /* Initialise the memory allocation susbsystem */ +pcre_init(); /* Set up memory handling for pcre */ + /* If the Exim user and/or group and/or the configuration file owner/group were defined by ref:name at build time, we must now find the actual uid/gid values. This is a feature to make the lives of binary distributors easier. */ @@ -1516,49 +2008,32 @@ This is a feature to make the lives of binary distributors easier. */ if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid)) { if (exim_uid == 0) - { - fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n", - EXIM_USERNAME); - exit(EXIT_FAILURE); - } + exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME); + /* If ref:name uses a number as the name, route_finduser() returns TRUE with exim_uid set and pw coerced to NULL. */ if (pw) exim_gid = pw->pw_gid; #ifndef EXIM_GROUPNAME else - { - fprintf(stderr, + exim_fail( "exim: ref:name should specify a usercode, not a group.\n" "exim: can't let you get away with it unless you also specify a group.\n"); - exit(EXIT_FAILURE); - } #endif } else - { - fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n", - EXIM_USERNAME); - exit(EXIT_FAILURE); - } + exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME); #endif #ifdef EXIM_GROUPNAME if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid)) - { - fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n", - EXIM_GROUPNAME); - exit(EXIT_FAILURE); - } + exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME); #endif #ifdef CONFIGURE_OWNERNAME if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid)) - { - fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n", + exim_fail("exim: failed to find uid for user name \"%s\"\n", CONFIGURE_OWNERNAME); - exit(EXIT_FAILURE); - } #endif /* We default the system_filter_user to be the Exim run-time user, as a @@ -1567,15 +2042,13 @@ system_filter_uid = exim_uid; #ifdef CONFIGURE_GROUPNAME if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid)) - { - fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n", + exim_fail("exim: failed to find gid for group name \"%s\"\n", CONFIGURE_GROUPNAME); - exit(EXIT_FAILURE); - } #endif -/* In the Cygwin environment, some initialization needs doing. It is fudged -in by means of this macro. */ +/* In the Cygwin environment, some initialization used to need doing. +It was fudged in by means of this macro; now no longer but we'll leave +it in case of others. */ #ifdef OS_INIT OS_INIT @@ -1584,8 +2057,14 @@ OS_INIT /* Check a field which is patched when we are running Exim within its testing harness; do a fast initial check, and then the whole thing. */ -running_in_test_harness = +f.running_in_test_harness = *running_status == '<' && Ustrcmp(running_status, "<<>>") == 0; +if (f.running_in_test_harness) + debug_store = TRUE; + +/* Protect against abusive argv[0] */ +if (!argv[0] || !argc) exim_fail("exim: executable name required\n"); +exim_str_fail_toolong(argv[0], PATH_MAX, "argv[0]"); /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed at the start of a program; however, it seems that some environments do not @@ -1594,6 +2073,12 @@ make quite sure. */ setlocale(LC_ALL, "C"); +/* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */ + +#ifdef _POSIX_MONOTONIC_CLOCK +exim_clock_init(); +#endif + /* Set up the default handler for timing using alarm(). */ os_non_restarting_signal(SIGALRM, sigalrm_handler); @@ -1601,12 +2086,12 @@ os_non_restarting_signal(SIGALRM, sigalrm_handler); /* Ensure we have a buffer for constructing log entries. Use malloc directly, because store_malloc writes a log entry on failure. */ -log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE); -if (log_buffer == NULL) - { - fprintf(stderr, "exim: failed to get store for log buffer\n"); - exit(EXIT_FAILURE); - } +if (!(log_buffer = US malloc(LOG_BUFFER_SIZE))) + exim_fail("exim: failed to get store for log buffer\n"); + +/* Initialize the default log options. */ + +bits_set(log_selector, log_selector_size, log_default); /* Set log_stderr to stderr, provided that stderr exists. This gets reset to NULL when the daemon is run and the file is closed. We have to use this @@ -1615,15 +2100,6 @@ indirection, because some systems don't allow writing to the variable "stderr". if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr; -/* Arrange for the PCRE regex library to use our store functions. Note that -the normal calls are actually macros that add additional arguments for -debugging purposes so we have to assign specially constructed functions here. -The default is to use store in the stacking pool, but this is overridden in the -regex_must_compile() function. */ - -pcre_malloc = function_store_get; -pcre_free = function_dummy_free; - /* Ensure there is a big buffer for temporary use in several places. It is put in malloc store so that it can be freed for enlargement if necessary. */ @@ -1632,8 +2108,22 @@ big_buffer = store_malloc(big_buffer_size); /* Set up the handler for the data request signal, and set the initial descriptive text. */ +process_info = store_get(PROCESS_INFO_SIZE, GET_TAINTED); set_process_info("initializing"); -os_restarting_signal(SIGUSR1, usr1_handler); +os_restarting_signal(SIGUSR1, usr1_handler); /* exiwhat */ +#ifdef SA_SIGINFO + { + struct sigaction act = { .sa_sigaction = segv_handler, .sa_flags = SA_RESETHAND | SA_SIGINFO }; + sigaction(SIGSEGV, &act, NULL); + } +#else +signal(SIGSEGV, segv_handler); /* log faults */ +#endif + +/* If running in a dockerized environment, the TERM signal is only +delegated to the PID 1 if we request it by setting an signal handler */ + +if (getpid() == 1) signal(SIGTERM, term_handler); /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate in the daemon code. For the rest of Exim's uses, we ignore it. */ @@ -1700,7 +2190,14 @@ this here, because the -M options check their arguments for syntactic validity using mac_ismsgid, which uses this. */ regex_ismsgid = - regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE); + regex_must_compile(US"^(?:" + "[^\\W_]{" str(MESSAGE_ID_TIME_LEN) "}" + "-[^\\W_]{" str(MESSAGE_ID_PID_LEN) "}" + "-[^\\W_]{" str(MESSAGE_ID_SUBTIME_LEN) "}" + "|" + "(?:[^\\W_]{6}-){2}[^\\W_]{2}" /* old ID format */ + ")$", + MCS_NOFLAGS, TRUE); /* Precompile the regular expression that is used for matching an SMTP error code, possibly extended, at the start of an error message. Note that the @@ -1708,17 +2205,16 @@ terminating whitespace character is included. */ regex_smtp_code = regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?", - FALSE, TRUE); + MCS_NOFLAGS, TRUE); #ifdef WHITELIST_D_MACROS /* Precompile the regular expression used to filter the content of macros given to -D for permissibility. */ regex_whitelisted_macro = - regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE); + regex_must_compile(US"^[A-Za-z0-9_/.-]*$", MCS_NOFLAGS, TRUE); #endif - /* If the program is called as "mailq" treat it as equivalent to "exim -bp"; this seems to be a generally accepted convention, since one finds symbolic links called "mailq" in standard OS configurations. */ @@ -1740,7 +2236,7 @@ message has been sent). */ if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) || (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0)) { - dot_ends = FALSE; + f.dot_ends = FALSE; called_as = US"-rmail"; errors_sender_rc = EXIT_SUCCESS; } @@ -1761,7 +2257,7 @@ this is a smail convention. */ if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) || (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0)) { - queue_interval = 0; + alloc_onetime_qrunner(); receiving_message = FALSE; called_as = US"-runq"; } @@ -1781,6 +2277,7 @@ if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) || normally be root, but in some esoteric environments it may not be. */ original_euid = geteuid(); +original_egid = getegid(); /* Get the real uid and gid. If the caller is root, force the effective uid/gid to be the same as the real ones. This makes a difference only if Exim is setuid @@ -1792,20 +2289,12 @@ real_gid = getgid(); if (real_uid == root_uid) { - rv = setgid(real_gid); - if (rv) - { - fprintf(stderr, "exim: setgid(%ld) failed: %s\n", + if ((rv = setgid(real_gid))) + exim_fail("exim: setgid(%ld) failed: %s\n", (long int)real_gid, strerror(errno)); - exit(EXIT_FAILURE); - } - rv = setuid(real_uid); - if (rv) - { - fprintf(stderr, "exim: setuid(%ld) failed: %s\n", + if ((rv = setuid(real_uid))) + exim_fail("exim: setuid(%ld) failed: %s\n", (long int)real_uid, strerror(errno)); - exit(EXIT_FAILURE); - } } /* If neither the original real uid nor the original euid was root, Exim is @@ -1813,16 +2302,21 @@ running in an unprivileged state. */ unprivileged = (real_uid != root_uid && original_euid != root_uid); +/* For most of the args-parsing we need to use permanent pool memory */ + { + int old_pool = store_pool; + store_pool = POOL_PERM; + /* Scan the program's arguments. Some can be dealt with right away; others are simply recorded for checking and handling afterwards. Do a high-level switch on the second character (the one after '-'), to save some effort. */ -for (i = 1; i < argc; i++) + for (i = 1; i < argc; i++) { BOOL badarg = FALSE; - uschar *arg = argv[i]; - uschar *argrest; - int switchchar; + const uschar * arg = argv[i]; + const uschar * argrest; + uschar switchchar; /* An argument not starting with '-' is the start of a recipients list; break out of the options-scanning loop. */ @@ -1833,7 +2327,7 @@ for (i = 1; i < argc; i++) break; } - /* An option consistion of -- terminates the options */ + /* An option consisting of -- terminates the options */ if (Ustrcmp(arg, "--") == 0) { @@ -1862,7 +2356,7 @@ for (i = 1; i < argc; i++) { switchchar = arg[3]; argrest += 2; - queue_2stage = TRUE; + f.queue_2stage = TRUE; } /* Make -r synonymous with -f, since it is a documented alias */ @@ -1900,387 +2394,412 @@ for (i = 1; i < argc; i++) /* sendmail uses -Ac and -Am to control which .cf file is used; we ignore them. */ case 'A': - if (*argrest == '\0') { badarg = TRUE; break; } - else - { - BOOL ignore = FALSE; - switch (*argrest) - { - case 'c': - case 'm': - if (*(argrest + 1) == '\0') - ignore = TRUE; - break; - } - if (!ignore) { badarg = TRUE; break; } - } - break; + if (!*argrest) { badarg = TRUE; break; } + else + { + BOOL ignore = FALSE; + switch (*argrest) + { + case 'c': + case 'm': + if (*(argrest + 1) == '\0') + ignore = TRUE; + break; + } + if (!ignore) badarg = TRUE; + } + break; + + /* -atrn */ + case 'a': + if (Ustrcmp(argrest, "trn") == 0) + if (i+2 < argc) + { + atrn_mode = US"C"; /* Customer mode */ + + /* The host could at this point have a port attached */ + atrn_host = exim_arg_copy(argv[++i], EXIM_DOMAINNAME_MAX, "-atrn"); + atrn_domains = exim_arg_copy(argv[++i], EXIM_DOMAINNAME_MAX*4, + "-atrn"); + i++; + } + else + exim_fail("exim: host and domainlist expected after %s\n", argv[i]); + else badarg = TRUE; + break; /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean so has no need of it. */ case 'B': - if (*argrest == 0) i++; /* Skip over the type */ - break; + if (!*argrest) i++; /* Skip over the type */ + break; case 'b': - receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */ - - /* -bd: Run in daemon mode, awaiting SMTP connections. - -bdf: Ditto, but in the foreground. - */ - - if (*argrest == 'd') { - daemon_listen = TRUE; - if (*(++argrest) == 'f') background_daemon = FALSE; - else if (*argrest != 0) { badarg = TRUE; break; } - } - - /* -be: Run in expansion test mode - -bem: Ditto, but read a message from a file first - */ + receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */ + + switch (*argrest++) + { + /* -bd: Run in daemon mode, awaiting SMTP connections. + -bdf: Ditto, but in the foreground. + */ + case 'd': + f.daemon_listen = f.daemon_scion = TRUE; + if (*argrest == 'f') f.background_daemon = FALSE; + else if (*argrest) badarg = TRUE; + break; + + /* -be: Run in expansion test mode + -bem: Ditto, but read a message from a file first + */ + case 'e': + expansion_test = checking = TRUE; + if (*argrest == 'm') + { + if (++i >= argc) { badarg = TRUE; break; } + expansion_test_message = argv[i]; + argrest++; + } + if (*argrest) badarg = TRUE; + break; + + /* -bF: Run system filter test */ + case 'F': + filter_test |= checking = FTEST_SYSTEM; + if (*argrest) badarg = TRUE; + else if (++i < argc) filter_test_sfile = argv[i]; + else exim_fail("exim: file name expected after %s\n", argv[i-1]); + break; + + /* -bf: Run user filter test + -bfd: Set domain for filter testing + -bfl: Set local part for filter testing + -bfp: Set prefix for filter testing + -bfs: Set suffix for filter testing + */ + case 'f': + if (!*argrest) + { + filter_test |= checking = FTEST_USER; + if (++i < argc) filter_test_ufile = argv[i]; + else exim_fail("exim: file name expected after %s\n", argv[i-1]); + } + else + { + if (++i >= argc) + exim_fail("exim: string expected after %s\n", arg); + if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd"); + else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl"); + else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp"); + else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs"); + else badarg = TRUE; + } + break; + + /* -bh: Host checking - an IP address must follow. */ + case 'h': + if ( (!*argrest || Ustrcmp(argrest, "c") == 0) + && ++i < argc) + { + sender_host_address = string_copy_taint( + exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"), + GET_TAINTED); + host_checking = checking = f.log_testing_mode = TRUE; + f.host_checking_callout = *argrest == 'c'; + message_logs = FALSE; + } + else + badarg = TRUE; + break; + + /* -bi: This option is used by sendmail to initialize *the* alias file, + though it has the -oA option to specify a different file. Exim has no + concept of *the* alias file, but since Sun's YP make script calls + sendmail this way, some support must be provided. */ + case 'i': + if (!*argrest) bi_option = TRUE; + else badarg = TRUE; + break; + + /* -bI: provide information, of the type to follow after a colon. + This is an Exim flag. */ + case 'I': + if (Ustrlen(argrest) >= 1 && *argrest == ':') + { + const uschar * p = argrest+1; + info_flag = CMDINFO_HELP; + if (Ustrlen(p)) + if (strcmpic(p, CUS"sieve") == 0) + { + info_flag = CMDINFO_SIEVE; + info_stdout = TRUE; + } + else if (strcmpic(p, CUS"dscp") == 0) + { + info_flag = CMDINFO_DSCP; + info_stdout = TRUE; + } + else if (strcmpic(p, CUS"help") == 0) + info_stdout = TRUE; + } + else badarg = TRUE; + break; + + /* -bm: Accept and deliver message - the default option. Reinstate + receiving_message, which got turned off for all -b options. + -bmalware: test the filename given for malware */ + case 'm': + if (!*argrest) receiving_message = TRUE; + else if (Ustrcmp(argrest, "alware") == 0) + { + if (++i >= argc) { badarg = TRUE; break; } + checking = TRUE; + malware_test_file = argv[i]; + } + else badarg = TRUE; + break; + + /* -bnq: For locally originating messages, do not qualify unqualified + addresses. In the envelope, this causes errors; in header lines they + just get left. */ + case 'n': + if (Ustrcmp(argrest, "q") == 0) + { + f.allow_unqualified_sender = FALSE; + f.allow_unqualified_recipient = FALSE; + } + else badarg = TRUE; + break; + + /* -bpxx: List the contents of the mail queue, in various forms. If + the option is -bpc, just a queue count is needed. Otherwise, if the + first letter after p is r, then order is random. */ + case 'p': + if (*argrest == 'c') + { + count_queue = TRUE; + if (*++argrest) badarg = TRUE; + break; + } - else if (*argrest == 'e') - { - expansion_test = checking = TRUE; - if (argrest[1] == 'm') - { - if (++i >= argc) { badarg = TRUE; break; } - expansion_test_message = argv[i]; - argrest++; - } - if (argrest[1] != 0) { badarg = TRUE; break; } - } + if (*argrest == 'r') + list_queue_option = QL_UNSORTED, argrest++; + else + list_queue_option = QL_BASIC; - /* -bF: Run system filter test */ + list_queue = TRUE; - else if (*argrest == 'F') - { - filter_test |= FTEST_SYSTEM; - if (*(++argrest) != 0) { badarg = TRUE; break; } - if (++i < argc) filter_test_sfile = argv[i]; else - { - fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]); - exit(EXIT_FAILURE); - } - } + /* -bp: List the contents of the mail queue, top-level only */ - /* -bf: Run user filter test - -bfd: Set domain for filter testing - -bfl: Set local part for filter testing - -bfp: Set prefix for filter testing - -bfs: Set suffix for filter testing - */ + if (!*argrest) {} - else if (*argrest == 'f') - { - if (*(++argrest) == 0) - { - filter_test |= FTEST_USER; - if (++i < argc) filter_test_ufile = argv[i]; else - { - fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]); - exit(EXIT_FAILURE); - } - } - else - { - if (++i >= argc) - { - fprintf(stderr, "exim: string expected after %s\n", arg); - exit(EXIT_FAILURE); - } - if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i]; - else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i]; - else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i]; - else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i]; - else { badarg = TRUE; break; } - } - } + /* -bpu: List the contents of the mail queue, top-level undelivered */ - /* -bh: Host checking - an IP address must follow. */ + else if (Ustrcmp(argrest, "u") == 0) list_queue_option |= QL_UNDELIVERED_ONLY; - else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0) - { - if (++i >= argc) { badarg = TRUE; break; } - sender_host_address = argv[i]; - host_checking = checking = log_testing_mode = TRUE; - host_checking_callout = argrest[1] == 'c'; - } + /* -bpa: List the contents of the mail queue, including all delivered */ - /* -bi: This option is used by sendmail to initialize *the* alias file, - though it has the -oA option to specify a different file. Exim has no - concept of *the* alias file, but since Sun's YP make script calls - sendmail this way, some support must be provided. */ + else if (Ustrcmp(argrest, "a") == 0) list_queue_option |= QL_PLUS_GENERATED; - else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE; + /* -bpi: List only message IDs */ - /* -bI: provide information, of the type to follow after a colon. - This is an Exim flag. */ + else if (Ustrcmp(argrest, "i") == 0) list_queue_option |= QL_MSGID_ONLY; - else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':') - { - uschar *p = &argrest[2]; - info_flag = CMDINFO_HELP; - if (Ustrlen(p)) - { - if (strcmpic(p, CUS"sieve") == 0) - { - info_flag = CMDINFO_SIEVE; - info_stdout = TRUE; - } - else if (strcmpic(p, CUS"dscp") == 0) - { - info_flag = CMDINFO_DSCP; - info_stdout = TRUE; - } - else if (strcmpic(p, CUS"help") == 0) - { - info_stdout = TRUE; - } - } - } + /* Unknown after -bp[r] */ - /* -bm: Accept and deliver message - the default option. Reinstate - receiving_message, which got turned off for all -b options. */ + else badarg = TRUE; + break; - else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE; - /* -bmalware: test the filename given for malware */ + /* -bP: List the configuration variables given as the address list. + Force -v, so configuration errors get displayed. */ + case 'P': - else if (Ustrcmp(argrest, "malware") == 0) - { - if (++i >= argc) { badarg = TRUE; break; } - malware_test_file = argv[i]; - } + /* -bP config: we need to setup here, because later, + when list_options is checked, the config is read already */ + if (*argrest) + badarg = TRUE; + else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0) + { + list_config = TRUE; + readconf_save_config(version_string); + } + else + { + list_options = TRUE; + debug_selector |= D_v; + debug_file = stderr; + } + break; + + /* -brt: Test retry configuration lookup */ + case 'r': + if (Ustrcmp(argrest, "t") == 0) + { + checking = TRUE; + test_retry_arg = i + 1; + goto END_ARG; + } - /* -bnq: For locally originating messages, do not qualify unqualified - addresses. In the envelope, this causes errors; in header lines they - just get left. */ + /* -brw: Test rewrite configuration */ - else if (Ustrcmp(argrest, "nq") == 0) - { - allow_unqualified_sender = FALSE; - allow_unqualified_recipient = FALSE; + else if (Ustrcmp(argrest, "w") == 0) + { + checking = TRUE; + test_rewrite_arg = i + 1; + goto END_ARG; + } + else badarg = TRUE; + break; + + /* -bS: Read SMTP commands on standard input, but produce no replies - + all errors are reported by sending messages. */ + case 'S': + if (!*argrest) + smtp_input = smtp_batched_input = receiving_message = TRUE; + else badarg = TRUE; + break; + + /* -bs: Read SMTP commands on standard input and produce SMTP replies + on standard output. */ + case 's': + if (!*argrest) smtp_input = receiving_message = TRUE; + else badarg = TRUE; + break; + + /* -bt: address testing mode */ + case 't': + if (!*argrest) + f.address_test_mode = checking = f.log_testing_mode = TRUE; + else badarg = TRUE; + break; + + /* -bv: verify addresses */ + case 'v': + if (!*argrest) + verify_address_mode = checking = f.log_testing_mode = TRUE; + + /* -bvs: verify sender addresses */ + + else if (Ustrcmp(argrest, "s") == 0) + { + verify_address_mode = checking = f.log_testing_mode = TRUE; + verify_as_sender = TRUE; + } + else badarg = TRUE; + break; + + /* -bV: Print version string and support details */ + case 'V': + if (!*argrest) + { + printf("Exim version %s #%s built %s\n", version_string, + version_cnumber, version_date); + printf("%s\n", CS version_copyright); + version_printed = TRUE; + show_whats_supported(TRUE); + f.log_testing_mode = TRUE; + } + else badarg = TRUE; + break; + + /* -bw: inetd wait mode, accept a listening socket as stdin */ + case 'w': + f.inetd_wait_mode = f.daemon_listen = f.daemon_scion = TRUE; + f.background_daemon = FALSE; + if (*argrest) + if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0) + exim_fail("exim: bad time value %s: abandoned\n", argv[i]); + break; + + default: + badarg = TRUE; + break; + } + break; } - /* -bpxx: List the contents of the mail queue, in various forms. If - the option is -bpc, just a queue count is needed. Otherwise, if the - first letter after p is r, then order is random. */ - else if (*argrest == 'p') - { - if (*(++argrest) == 'c') - { - count_queue = TRUE; - if (*(++argrest) != 0) badarg = TRUE; - break; - } + /* -C: change configuration file list; ignore if it isn't really + a change! Enforce a prefix check if required. */ - if (*argrest == 'r') + case 'C': + if (!*argrest) + if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; } + if (Ustrcmp(config_main_filelist, argrest) != 0) + { + #ifdef ALT_CONFIG_PREFIX + int sep = 0; + int len = Ustrlen(ALT_CONFIG_PREFIX); + const uschar *list = argrest; + uschar *filename; + /* The argv is untainted, so big_buffer (also untainted) is ok to use */ + while((filename = string_nextinlist(&list, &sep, big_buffer, + big_buffer_size))) + if ( ( Ustrlen(filename) < len + || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 + || Ustrstr(filename, "/../") != NULL + ) + && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid) + ) + exim_fail("-C Permission denied\n"); + #endif + if (real_uid != root_uid) { - list_queue_option = 8; - argrest++; - } - else list_queue_option = 0; - - list_queue = TRUE; - - /* -bp: List the contents of the mail queue, top-level only */ - - if (*argrest == 0) {} + #ifdef TRUSTED_CONFIG_LIST - /* -bpu: List the contents of the mail queue, top-level undelivered */ + if (real_uid != exim_uid + #ifdef CONFIGURE_OWNER + && real_uid != config_uid + #endif + ) + f.trusted_config = FALSE; + else + { + FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb"); + if (trust_list) + { + struct stat statbuf; - else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1; - - /* -bpa: List the contents of the mail queue, including all delivered */ - - else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2; - - /* Unknown after -bp[r] */ - - else - { - badarg = TRUE; - break; - } - } - - - /* -bP: List the configuration variables given as the address list. - Force -v, so configuration errors get displayed. */ - - else if (Ustrcmp(argrest, "P") == 0) - { - list_options = TRUE; - debug_selector |= D_v; - debug_file = stderr; - } - - /* -brt: Test retry configuration lookup */ - - else if (Ustrcmp(argrest, "rt") == 0) - { - test_retry_arg = i + 1; - goto END_ARG; - } - - /* -brw: Test rewrite configuration */ - - else if (Ustrcmp(argrest, "rw") == 0) - { - test_rewrite_arg = i + 1; - goto END_ARG; - } - - /* -bS: Read SMTP commands on standard input, but produce no replies - - all errors are reported by sending messages. */ - - else if (Ustrcmp(argrest, "S") == 0) - smtp_input = smtp_batched_input = receiving_message = TRUE; - - /* -bs: Read SMTP commands on standard input and produce SMTP replies - on standard output. */ - - else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE; - - /* -bt: address testing mode */ - - else if (Ustrcmp(argrest, "t") == 0) - address_test_mode = checking = log_testing_mode = TRUE; - - /* -bv: verify addresses */ - - else if (Ustrcmp(argrest, "v") == 0) - verify_address_mode = checking = log_testing_mode = TRUE; - - /* -bvs: verify sender addresses */ - - else if (Ustrcmp(argrest, "vs") == 0) - { - verify_address_mode = checking = log_testing_mode = TRUE; - verify_as_sender = TRUE; - } - - /* -bV: Print version string and support details */ - - else if (Ustrcmp(argrest, "V") == 0) - { - printf("Exim version %s #%s built %s\n", version_string, - version_cnumber, version_date); - printf("%s\n", CS version_copyright); - version_printed = TRUE; - show_whats_supported(stdout); - } - - /* -bw: inetd wait mode, accept a listening socket as stdin */ - - else if (*argrest == 'w') - { - inetd_wait_mode = TRUE; - background_daemon = FALSE; - daemon_listen = TRUE; - if (*(++argrest) != '\0') - { - inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE); - if (inetd_wait_timeout <= 0) - { - fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]); - exit(EXIT_FAILURE); - } - } - } - - else badarg = TRUE; - break; - - - /* -C: change configuration file list; ignore if it isn't really - a change! Enforce a prefix check if required. */ - - case 'C': - if (*argrest == 0) - { - if(++i < argc) argrest = argv[i]; else - { badarg = TRUE; break; } - } - if (Ustrcmp(config_main_filelist, argrest) != 0) - { - #ifdef ALT_CONFIG_PREFIX - int sep = 0; - int len = Ustrlen(ALT_CONFIG_PREFIX); - uschar *list = argrest; - uschar *filename; - while((filename = string_nextinlist(&list, &sep, big_buffer, - big_buffer_size)) != NULL) - { - if ((Ustrlen(filename) < len || - Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 || - Ustrstr(filename, "/../") != NULL) && - (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)) - { - fprintf(stderr, "-C Permission denied\n"); - exit(EXIT_FAILURE); - } - } - #endif - if (real_uid != root_uid) - { - #ifdef TRUSTED_CONFIG_LIST - - if (real_uid != exim_uid - #ifdef CONFIGURE_OWNER - && real_uid != config_uid - #endif - ) - trusted_config = FALSE; - else - { - FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb"); - if (trust_list) - { - struct stat statbuf; - - if (fstat(fileno(trust_list), &statbuf) != 0 || - (statbuf.st_uid != root_uid /* owner not root */ - #ifdef CONFIGURE_OWNER - && statbuf.st_uid != config_uid /* owner not the special one */ - #endif - ) || /* or */ - (statbuf.st_gid != root_gid /* group not root */ - #ifdef CONFIGURE_GROUP - && statbuf.st_gid != config_gid /* group not the special one */ - #endif - && (statbuf.st_mode & 020) != 0 /* group writeable */ - ) || /* or */ - (statbuf.st_mode & 2) != 0) /* world writeable */ - { - trusted_config = FALSE; - fclose(trust_list); - } - else - { - /* Well, the trust list at least is up to scratch... */ - void *reset_point = store_get(0); - uschar *trusted_configs[32]; - int nr_configs = 0; - int i = 0; + if (fstat(fileno(trust_list), &statbuf) != 0 || + (statbuf.st_uid != root_uid /* owner not root */ + #ifdef CONFIGURE_OWNER + && statbuf.st_uid != config_uid /* owner not the special one */ + #endif + ) || /* or */ + (statbuf.st_gid != root_gid /* group not root */ + #ifdef CONFIGURE_GROUP + && statbuf.st_gid != config_gid /* group not the special one */ + #endif + && (statbuf.st_mode & 020) != 0 /* group writeable */ + ) || /* or */ + (statbuf.st_mode & 2) != 0) /* world writeable */ + { + f.trusted_config = FALSE; + fclose(trust_list); + } + else + { + /* Well, the trust list at least is up to scratch... */ + rmark reset_point; + uschar *trusted_configs[32]; + int nr_configs = 0; + int i = 0; + int old_pool = store_pool; + store_pool = POOL_MAIN; + reset_point = store_mark(); while (Ufgets(big_buffer, big_buffer_size, trust_list)) { - uschar *start = big_buffer, *nl; - while (*start && isspace(*start)) - start++; - if (*start != '/') + uschar * start = big_buffer, * nl; + if (Uskip_whitespace(&start) != '/') continue; - nl = Ustrchr(start, '\n'); - if (nl) - *nl = 0; + if ((nl = Ustrchr(start, '\n'))) + *nl = '\0'; trusted_configs[nr_configs++] = string_copy(start); - if (nr_configs == 32) + if (nr_configs == nelem(trusted_configs)) break; } fclose(trust_list); @@ -2288,45 +2807,38 @@ for (i = 1; i < argc; i++) if (nr_configs) { int sep = 0; - uschar *list = argrest; + const uschar *list = argrest; uschar *filename; - while (trusted_config && (filename = string_nextinlist(&list, - &sep, big_buffer, big_buffer_size)) != NULL) + while (f.trusted_config && (filename = string_nextinlist(&list, + &sep, big_buffer, big_buffer_size))) { for (i=0; i < nr_configs; i++) - { if (Ustrcmp(filename, trusted_configs[i]) == 0) break; - } if (i == nr_configs) { - trusted_config = FALSE; + f.trusted_config = FALSE; break; } } - store_reset(reset_point); - } - else - { - /* No valid prefixes found in trust_list file. */ - trusted_config = FALSE; } + else /* No valid prefixes found in trust_list file. */ + f.trusted_config = FALSE; + store_reset(reset_point); + store_pool = old_pool; } } - else - { - /* Could not open trust_list file. */ - trusted_config = FALSE; - } + else /* Could not open trust_list file. */ + f.trusted_config = FALSE; } #else /* Not root; don't trust config */ - trusted_config = FALSE; + f.trusted_config = FALSE; #endif } config_main_filelist = argrest; - config_changed = TRUE; + f.config_changed = TRUE; } break; @@ -2334,25 +2846,21 @@ for (i = 1; i < argc; i++) /* -D: set up a macro definition */ case 'D': - #ifdef DISABLE_D_OPTION - fprintf(stderr, "exim: -D is not available in this Exim binary\n"); - exit(EXIT_FAILURE); - #else +#ifdef DISABLE_D_OPTION + exim_fail("exim: -D is not available in this Exim binary\n"); +#else { int ptr = 0; - macro_item *mlast = NULL; - macro_item *m; + macro_item * m; uschar name[24]; - uschar *s = argrest; + const uschar * s = argrest; - while (isspace(*s)) s++; + opt_D_used = TRUE; + Uskip_whitespace(&s); if (*s < 'A' || *s > 'Z') - { - fprintf(stderr, "exim: macro name set by -D must start with " + exim_fail("exim: macro name set by -D must start with " "an upper case letter\n"); - exit(EXIT_FAILURE); - } while (isalnum(*s) || *s == '_') { @@ -2361,67 +2869,67 @@ for (i = 1; i < argc; i++) } name[ptr] = 0; if (ptr == 0) { badarg = TRUE; break; } - while (isspace(*s)) s++; - if (*s != 0) + if (Uskip_whitespace(&s)) { if (*s++ != '=') { badarg = TRUE; break; } - while (isspace(*s)) s++; + Uskip_whitespace(&s); } - for (m = macros; m != NULL; m = m->next) - { + for (m = macros_user; m; m = m->next) if (Ustrcmp(m->name, name) == 0) - { - fprintf(stderr, "exim: duplicated -D in command line\n"); - exit(EXIT_FAILURE); - } - mlast = m; - } + exim_fail("exim: duplicated -D in command line\n"); - m = store_get(sizeof(macro_item) + Ustrlen(name)); - m->next = NULL; - m->command_line = TRUE; - if (mlast == NULL) macros = m; else mlast->next = m; - Ustrcpy(m->name, name); - m->replacement = string_copy(s); + m = macro_create(name, s, TRUE); if (clmacro_count >= MAX_CLMACROS) - { - fprintf(stderr, "exim: too many -D options on command line\n"); - exit(EXIT_FAILURE); - } - clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name, - m->replacement); + exim_fail("exim: too many -D options on command line\n"); + clmacros[clmacro_count++] = + string_sprintf("-D%s=%s", m->name, m->replacement); } #endif break; - /* -d: Set debug level (see also -v below) or set the drop_cr option. - The latter is now a no-op, retained for compatibility only. If -dd is used, - debugging subprocesses of the daemon is disabled. */ - case 'd': + + /* -dropcr: Set this option. Now a no-op, retained for compatibility only. */ + if (Ustrcmp(argrest, "ropcr") == 0) { /* drop_cr = TRUE; */ } - /* Use an intermediate variable so that we don't set debugging while - decoding the debugging bits. */ + /* -dp: Set up a debug pretrigger buffer with given size. */ + + else if (Ustrcmp(argrest, "p") == 0) + if (++i >= argc) + badarg = TRUE; + else + debug_pretrigger_setup(argv[i]); + + /* -dt: Set a debug trigger selector */ + + else if (Ustrncmp(argrest, "t=", 2) == 0) + dtrigger_selector = (unsigned int) Ustrtol(argrest + 2, NULL, 0); + + /* -d: Set debug level (see also -v below). + If -dd is used, debugging subprocesses of the daemon is disabled. */ else { + /* Use an intermediate variable so that we don't set debugging while + decoding the debugging bits. */ + unsigned int selector = D_default; debug_selector = 0; debug_file = NULL; if (*argrest == 'd') { - debug_daemon = TRUE; + f.debug_daemon = TRUE; argrest++; } - if (*argrest != 0) - decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options, - debug_options_count, US"debug", 0); + if (*argrest) + decode_bits(&selector, 1, debug_notall, argrest, + debug_options, debug_options_count, US"debug", 0); debug_selector = selector; } break; @@ -2435,7 +2943,7 @@ for (i = 1; i < argc; i++) message_reference at it, for logging. */ case 'E': - local_error_message = TRUE; + f.local_error_message = TRUE; if (mac_ismsgid(argrest)) message_reference = argrest; break; @@ -2466,13 +2974,12 @@ for (i = 1; i < argc; i++) the -F or be in the next argument. */ case 'F': - if (*argrest == 0) - { - if(++i < argc) argrest = argv[i]; else - { badarg = TRUE; break; } - } - originator_name = argrest; - sender_name_forced = TRUE; + if (!*argrest) + if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; } + originator_name = string_copy_taint( + exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"), + GET_TAINTED); + f.sender_name_forced = TRUE; break; @@ -2493,35 +3000,40 @@ for (i = 1; i < argc; i++) case 'f': { - int start, end; + int dummy_start, dummy_end; uschar *errmess; - if (*argrest == 0) - { - if (i+1 < argc) argrest = argv[++i]; else - { badarg = TRUE; break; } - } - if (*argrest == 0) - { - sender_address = string_sprintf(""); /* Ensure writeable memory */ - } + if (!*argrest) + if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; } + (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f"); + if (!*argrest) + { + uschar * s = store_get(1, GET_UNTAINTED); /* Ensure writeable memory */ + *s = '\0'; + sender_address = s; + } else { - uschar *temp = argrest + Ustrlen(argrest) - 1; + const uschar * temp = argrest + Ustrlen(argrest) - 1; while (temp >= argrest && isspace(*temp)) temp--; if (temp >= argrest && *temp == '.') f_end_dot = TRUE; allow_domain_literals = TRUE; strip_trailing_dot = TRUE; - sender_address = parse_extract_address(argrest, &errmess, &start, &end, - &sender_address_domain, TRUE); +#ifdef SUPPORT_I18N + allow_utf8_domains = TRUE; +#endif + if (!(sender_address = parse_extract_address(argrest, &errmess, + &dummy_start, &dummy_end, &sender_address_domain, TRUE))) + exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess); + + sender_address = string_copy_taint(sender_address, GET_TAINTED); +#ifdef SUPPORT_I18N + message_smtputf8 = string_is_utf8(sender_address); + allow_utf8_domains = FALSE; +#endif allow_domain_literals = FALSE; strip_trailing_dot = FALSE; - if (sender_address == NULL) - { - fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess); - return EXIT_FAILURE; - } } - sender_address_forced = TRUE; + f.sender_address_forced = TRUE; } break; @@ -2539,11 +3051,8 @@ for (i = 1; i < argc; i++) To put it in will require a change to the spool header file format. */ case 'h': - if (*argrest == 0) - { - if(++i < argc) argrest = argv[i]; else - { badarg = TRUE; break; } - } + if (!*argrest) + if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; } if (!isdigit(*argrest)) badarg = TRUE; break; @@ -2552,7 +3061,7 @@ for (i = 1; i < argc; i++) not to be documented for sendmail but mailx (at least) uses it) */ case 'i': - if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE; + if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE; break; @@ -2560,23 +3069,13 @@ for (i = 1; i < argc; i++) syslog_processname in the config file, but needs to be an admin option. */ case 'L': - if (*argrest == '\0') - { - if(++i < argc) argrest = argv[i]; else - { badarg = TRUE; break; } - } - sz = Ustrlen(argrest); - if (sz > 32) - { - fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest); - return EXIT_FAILURE; - } + if (!*argrest) + if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; } + if ((sz = Ustrlen(argrest)) > 32) + exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest); if (sz < 1) - { - fprintf(stderr, "exim: the -L syslog name is too short\n"); - return EXIT_FAILURE; - } - cmdline_syslog_name = argrest; + exim_fail("exim: the -L syslog name is too short\n"); + cmdline_syslog_name = string_copy_taint(argrest, GET_TAINTED); break; case 'M': @@ -2601,20 +3100,20 @@ for (i = 1; i < argc; i++) EXIM_SOCKLEN_T size = sizeof(interface_sock); if (argc != i + 6) - { - fprintf(stderr, "exim: too many or too few arguments after -MC\n"); - return EXIT_FAILURE; - } + exim_fail("exim: too many or too few arguments after -MC\n"); if (msg_action_arg >= 0) - { - fprintf(stderr, "exim: incompatible arguments\n"); - return EXIT_FAILURE; - } - - continue_transport = argv[++i]; - continue_hostname = argv[++i]; - continue_host_address = argv[++i]; + exim_fail("exim: incompatible arguments\n"); + + continue_transport = string_copy_taint( + exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"), + GET_TAINTED); + continue_hostname = string_copy_taint( + exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"), + GET_TAINTED); + continue_host_address = string_copy_taint( + exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"), + GET_TAINTED); continue_sequence = Uatoi(argv[++i]); msg_action = MSG_DELIVER; msg_action_arg = ++i; @@ -2623,81 +3122,166 @@ for (i = 1; i < argc; i++) queue_run_pipe = passed_qr_pipe; if (!mac_ismsgid(argv[i])) - { - fprintf(stderr, "exim: malformed message id %s after -MC option\n", + exim_fail("exim: malformed message id %s after -MC option\n", argv[i]); - return EXIT_FAILURE; - } - /* Set up $sending_ip_address and $sending_port */ + /* Set up $sending_ip_address and $sending_port, unless proxied */ - if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock), - &size) == 0) - sending_ip_address = host_ntoa(-1, &interface_sock, NULL, - &sending_port); - else - { - fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n", - strerror(errno)); - return EXIT_FAILURE; - } + if (!continue_proxy_cipher) + if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock), + &size) == 0) + sending_ip_address = host_ntoa(-1, &interface_sock, NULL, + &sending_port); + else + exim_fail("exim: getsockname() failed after -MC option: %s\n", + strerror(errno)); - if (running_in_test_harness) millisleep(500); + testharness_pause_ms(500); break; } + else if (*argrest == 'C' && argrest[1] && !argrest[2]) + { + switch(argrest[1]) + { /* -MCA: set the smtp_authenticated flag; this is useful only when it precedes -MC (see above). The flag indicates that the host to which Exim is connected has accepted an AUTH sequence. */ - else if (Ustrcmp(argrest, "CA") == 0) - { - smtp_authenticated = TRUE; - break; - } + case 'A': f.smtp_authenticated = TRUE; break; + + /* -MCD: set the smtp_use_dsn flag; this indicates that the host + that exim is connected to supports the esmtp extension DSN */ + + case 'D': smtp_peer_options |= OPTION_DSN; break; + + /* -MCd: for debug, set a process-purpose string */ + + case 'd': if (++i < argc) + process_purpose = string_copy_taint( + exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"), + GET_TAINTED); + else badarg = TRUE; + break; + + /* -MCG: set the queue name, to a non-default value. Arguably, anything + from the commandline should be tainted - but we will need an untainted + value for the spoolfile when doing a -odi delivery process. */ + + case 'G': if (++i < argc) queue_name = string_copy_taint( + exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"), + GET_UNTAINTED); + else badarg = TRUE; + break; + + /* -MCK: the peer offered CHUNKING. Must precede -MC */ + + case 'K': smtp_peer_options |= OPTION_CHUNKING; break; + +#ifndef DISABLE_ESMTP_LIMITS + /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */ + case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]); + else badarg = TRUE; + if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]); + else badarg = TRUE; + if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]); + else badarg = TRUE; + break; +#endif /* -MCP: set the smtp_use_pipelining flag; this is useful only when it preceded -MC (see above) */ - else if (Ustrcmp(argrest, "CP") == 0) - { - smtp_use_pipelining = TRUE; - break; - } - + case 'P': smtp_peer_options |= OPTION_PIPE; break; + +#ifdef SUPPORT_SOCKS + /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */ + case 'p': proxy_session = TRUE; + if (++i < argc) + { + proxy_local_address = string_copy_taint(argv[i], GET_TAINTED); + if (++i < argc) + { + proxy_local_port = Uatoi(argv[i]); + if (++i < argc) + { + proxy_external_address = string_copy_taint(argv[i], GET_TAINTED); + if (++i < argc) + { + proxy_external_port = Uatoi(argv[i]); + break; + } } } } + badarg = TRUE; + break; +#endif /* -MCQ: pass on the pid of the queue-running process that started this chain of deliveries and the fd of its synchronizing pipe; this is useful only when it precedes -MC (see above) */ - else if (Ustrcmp(argrest, "CQ") == 0) - { - if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i])); - else badarg = TRUE; - if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i])); - else badarg = TRUE; - break; - } + case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i])); + else badarg = TRUE; + if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i])); + else badarg = TRUE; + break; + + /* -MCq: do a quota check on the given recipient for the given size + of message. Separate from -MC. */ + case 'q': rcpt_verify_quota = TRUE; + if (++i < argc) message_size = Uatoi(argv[i]); + else badarg = TRUE; + break; /* -MCS: set the smtp_use_size flag; this is useful only when it precedes -MC (see above) */ - else if (Ustrcmp(argrest, "CS") == 0) - { - smtp_use_size = TRUE; - break; - } + case 'S': smtp_peer_options |= OPTION_SIZE; break; + +#ifndef DISABLE_TLS + /* -MCs: used with -MCt; SNI was sent */ + /* -MCr: ditto, DANE */ + + case 'r': + case 's': if (++i < argc) + { + continue_proxy_sni = string_copy_taint( + exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"), + GET_TAINTED); + if (argrest[1] == 'r') continue_proxy_dane = TRUE; + } + else badarg = TRUE; + break; + + /* -MCt: similar to -MCT below but the connection is still open + via a proxy process which handles the TLS context and coding. + Require three arguments for the proxied local address and port, + and the TLS cipher. */ + + case 't': if (++i < argc) + sending_ip_address = string_copy_taint( + exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"), + GET_TAINTED); + else badarg = TRUE; + if (++i < argc) + sending_port = (int)(Uatol(argv[i])); + else badarg = TRUE; + if (++i < argc) + continue_proxy_cipher = string_copy_taint( + exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"), + GET_TAINTED); + else badarg = TRUE; + /*FALLTHROUGH*/ /* -MCT: set the tls_offered flag; this is useful only when it precedes -MC (see above). The flag indicates that the host to which Exim is connected has offered TLS support. */ - #ifdef SUPPORT_TLS - else if (Ustrcmp(argrest, "CT") == 0) - { - tls_offered = TRUE; + case 'T': smtp_peer_options |= OPTION_TLS; break; +#endif + + default: badarg = TRUE; break; + } break; } - #endif /* -M[x]: various operations on the following list of message ids: -M deliver the messages, ignoring next retry times and thawing @@ -2710,6 +3294,7 @@ for (i = 1; i < argc; i++) following options which are followed by a single message id, and which act on that message. Some of them use the "recipient" addresses as well. -Mar add recipient(s) + -MG move to a different queue -Mmad mark all recipients delivered -Mmd mark recipients(s) delivered -Mes edit sender @@ -2720,10 +3305,10 @@ for (i = 1; i < argc; i++) -Mvl show log */ - else if (*argrest == 0) + else if (!*argrest) { msg_action = MSG_DELIVER; - forced_delivery = deliver_force_thaw = TRUE; + forced_delivery = f.deliver_force_thaw = TRUE; } else if (Ustrcmp(argrest, "ar") == 0) { @@ -2742,10 +3327,15 @@ for (i = 1; i < argc; i++) msg_action = MSG_DELIVER; deliver_give_up = TRUE; } - else if (Ustrcmp(argrest, "mad") == 0) + else if (Ustrcmp(argrest, "G") == 0) { - msg_action = MSG_MARK_ALL_DELIVERED; + msg_action = MSG_SETQUEUE; + queue_name_dest = string_copy_taint( + exim_str_fail_toolong(next_argv(argv, &i, argc, arg), + EXIM_DRIVERNAME_MAX, "-MG"), + GET_TAINTED); } + else if (Ustrcmp(argrest, "mad") == 0) msg_action = MSG_MARK_ALL_DELIVERED; else if (Ustrcmp(argrest, "md") == 0) { msg_action = MSG_MARK_DELIVERED; @@ -2784,22 +3374,15 @@ for (i = 1; i < argc; i++) msg_action_arg = i + 1; if (msg_action_arg >= argc) - { - fprintf(stderr, "exim: no message ids given after %s option\n", arg); - return EXIT_FAILURE; - } + exim_fail("exim: no message ids given after %s option\n", arg); /* Some require only message ids to follow */ if (!one_msg_action) { - int j; - for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j])) - { - fprintf(stderr, "exim: malformed message id %s after %s option\n", + for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j])) + exim_fail("exim: malformed message id %s after %s option\n", argv[j], arg); - return EXIT_FAILURE; - } goto END_ARG; /* Remaining args are ids */ } @@ -2809,11 +3392,8 @@ for (i = 1; i < argc; i++) else { if (!mac_ismsgid(argv[msg_action_arg])) - { - fprintf(stderr, "exim: malformed message id %s after %s option\n", + exim_fail("exim: malformed message id %s after %s option\n", argv[msg_action_arg], arg); - return EXIT_FAILURE; - } i++; } break; @@ -2823,7 +3403,7 @@ for (i = 1; i < argc; i++) for sendmail it askes for "me too". Exim always does this. */ case 'm': - if (*argrest != 0) badarg = TRUE; + if (*argrest) badarg = TRUE; break; @@ -2831,9 +3411,9 @@ for (i = 1; i < argc; i++) their thing. It implies debugging at the D_v level. */ case 'N': - if (*argrest == 0) + if (!*argrest) { - dont_deliver = TRUE; + f.dont_deliver = TRUE; debug_selector |= D_v; debug_file = stderr; } @@ -2854,209 +3434,265 @@ for (i = 1; i < argc; i++) -O option=value and -Ooption=value. */ case 'O': - if (*argrest == 0) - { + if (!*argrest) if (++i >= argc) - { - fprintf(stderr, "exim: string expected after -O\n"); - exit(EXIT_FAILURE); - } - } + exim_fail("exim: string expected after -O\n"); break; case 'o': - - /* -oA: Set an argument for the bi command (sendmail's "alternate alias - file" option). */ - - if (*argrest == 'A') - { - alias_arg = argrest + 1; - if (alias_arg[0] == 0) - { - if (i+1 < argc) alias_arg = argv[++i]; else - { - fprintf(stderr, "exim: string expected after -oA\n"); - exit(EXIT_FAILURE); - } - } - } - - /* -oB: Set a connection message max value for remote deliveries */ - - else if (*argrest == 'B') + switch (*argrest++) { - uschar *p = argrest + 1; - if (p[0] == 0) - { - if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else - { - connection_max_messages = 1; - p = NULL; - } - } - - if (p != NULL) - { - if (!isdigit(*p)) - { - fprintf(stderr, "exim: number expected after -oB\n"); - exit(EXIT_FAILURE); - } - connection_max_messages = Uatoi(p); - } - } - - /* -odb: background delivery */ - - else if (Ustrcmp(argrest, "db") == 0) - { - synchronous_delivery = FALSE; - arg_queue_only = FALSE; - queue_only_set = TRUE; - } - - /* -odf: foreground delivery (smail-compatible option); same effect as - -odi: interactive (synchronous) delivery (sendmail-compatible option) - */ - - else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0) - { - synchronous_delivery = TRUE; - arg_queue_only = FALSE; - queue_only_set = TRUE; - } - - /* -odq: queue only */ - - else if (Ustrcmp(argrest, "dq") == 0) - { - synchronous_delivery = FALSE; - arg_queue_only = TRUE; - queue_only_set = TRUE; - } - - /* -odqs: queue SMTP only - do local deliveries and remote routing, - but no remote delivery */ - - else if (Ustrcmp(argrest, "dqs") == 0) - { - queue_smtp = TRUE; - arg_queue_only = FALSE; - queue_only_set = TRUE; - } - - /* -oex: Sendmail error flags. As these are also accepted without the - leading -o prefix, for compatibility with vacation and other callers, - they are handled with -e above. */ - - /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i) - -oitrue: Another sendmail syntax for the same */ + /* -oA: Set an argument for the bi command (sendmail's "alternate alias + file" option). */ + case 'A': + if (!*(alias_arg = argrest)) + if (i+1 < argc) alias_arg = argv[++i]; + else exim_fail("exim: string expected after -oA\n"); + break; + + /* -oB: Set a connection message max value for remote deliveries */ + case 'B': + { + const uschar * p = argrest; + if (!*p) + if (i+1 < argc && isdigit((argv[i+1][0]))) + p = argv[++i]; + else + { + connection_max_messages = 1; + p = NULL; + } - else if (Ustrcmp(argrest, "i") == 0 || - Ustrcmp(argrest, "itrue") == 0) - dot_ends = FALSE; + if (p) + { + if (!isdigit(*p)) + exim_fail("exim: number expected after -oB\n"); + connection_max_messages = Uatoi(p); + } + } + break; + + /* -odb: background delivery */ + + case 'd': + if (Ustrcmp(argrest, "b") == 0) + { + f.synchronous_delivery = FALSE; + arg_queue_only = FALSE; + queue_only_set = TRUE; + } + + /* -odd: testsuite-only: add no inter-process delays */ + + else if (Ustrcmp(argrest, "d") == 0) + f.testsuite_delays = FALSE; + + /* -odf: foreground delivery (smail-compatible option); same effect as + -odi: interactive (synchronous) delivery (sendmail-compatible option) + */ + + else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0) + { + f.synchronous_delivery = TRUE; + arg_queue_only = FALSE; + queue_only_set = TRUE; + } + + /* -odq: queue only */ + + else if (Ustrcmp(argrest, "q") == 0) + { + f.synchronous_delivery = FALSE; + arg_queue_only = TRUE; + queue_only_set = TRUE; + } + + /* -odqs: queue SMTP only - do local deliveries and remote routing, + but no remote delivery */ + + else if (Ustrcmp(argrest, "qs") == 0) + { + f.queue_smtp = TRUE; + arg_queue_only = FALSE; + queue_only_set = TRUE; + } + else badarg = TRUE; + break; + + /* -oex: Sendmail error flags. As these are also accepted without the + leading -o prefix, for compatibility with vacation and other callers, + they are handled with -e above. */ + + /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i) + -oitrue: Another sendmail syntax for the same */ + + case 'i': + if (!*argrest || Ustrcmp(argrest, "true") == 0) + f.dot_ends = FALSE; + else badarg = TRUE; + break; /* -oM*: Set various characteristics for an incoming message; actually acted on for trusted callers only. */ - else if (*argrest == 'M') - { - if (i+1 >= argc) - { - fprintf(stderr, "exim: data expected after -o%s\n", argrest); - exit(EXIT_FAILURE); - } - - /* -oMa: Set sender host address */ + case 'M': + { + if (i+1 >= argc) + exim_fail("exim: data expected after -oM%s\n", argrest); - if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i]; + /* -oMa: Set sender host address */ - /* -oMaa: Set authenticator name */ + if (Ustrcmp(argrest, "a") == 0) + sender_host_address = string_copy_taint( + exim_str_fail_toolong(next_argv(argv, &i, argc, arg), + EXIM_IPADDR_MAX, "-oMa"), GET_TAINTED); - else if (Ustrcmp(argrest, "Maa") == 0) - sender_host_authenticated = argv[++i]; + /* -oMaa: Set authenticator name */ - /* -oMas: setting authenticated sender */ + else if (Ustrcmp(argrest, "aa") == 0) + sender_host_authenticated = string_copy_taint( + exim_str_fail_toolong(next_argv(argv, &i, argc, arg), + EXIM_DRIVERNAME_MAX, "-oMaa"), GET_TAINTED); - else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i]; + /* -oMas: setting authenticated sender */ - /* -oMai: setting authenticated id */ + else if (Ustrcmp(argrest, "as") == 0) + authenticated_sender = string_copy_taint( + exim_str_fail_toolong(next_argv(argv, &i, argc, arg), + EXIM_EMAILADDR_MAX, "-oMas"), GET_TAINTED); - else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i]; + /* -oMai: setting authenticated id */ - /* -oMi: Set incoming interface address */ + else if (Ustrcmp(argrest, "ai") == 0) + authenticated_id = string_copy_taint( + exim_str_fail_toolong(next_argv(argv, &i, argc, arg), + EXIM_EMAILADDR_MAX, "-oMai"), GET_TAINTED); - else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i]; + /* -oMi: Set incoming interface address */ - /* -oMr: Received protocol */ + else if (Ustrcmp(argrest, "i") == 0) + interface_address = string_copy_taint( + exim_str_fail_toolong(next_argv(argv, &i, argc, arg), + EXIM_IPADDR_MAX, "-oMi"), GET_TAINTED); - else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i]; + /* -oMm: Message reference */ - /* -oMs: Set sender host name */ + else if (Ustrcmp(argrest, "m") == 0) + { + if (!mac_ismsgid(argv[i+1])) + exim_fail("-oMm must be a valid message ID\n"); + if (!f.trusted_config) + exim_fail("-oMm must be called by a trusted user/config\n"); + message_reference = next_argv(argv, &i, argc, arg); + } - else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i]; + /* -oMr: Received protocol */ - /* -oMt: Set sender ident */ + else if (Ustrcmp(argrest, "r") == 0) - else if (Ustrcmp(argrest, "Mt") == 0) - { - sender_ident_set = TRUE; - sender_ident = argv[++i]; - } - - /* Else a bad argument */ - - else - { - badarg = TRUE; - break; - } - } - - /* -om: Me-too flag for aliases. Exim always does this. Some programs - seem to call this as -m (undocumented), so that is also accepted (see - above). */ - - else if (Ustrcmp(argrest, "m") == 0) {} - - /* -oo: An ancient flag for old-style addresses which still seems to - crop up in some calls (see in SCO). */ - - else if (Ustrcmp(argrest, "o") == 0) {} - - /* -oP : set pid file path for daemon */ - - else if (Ustrcmp(argrest, "P") == 0) - override_pid_file_path = argv[++i]; - - /* -or : set timeout for non-SMTP acceptance - -os : set timeout for SMTP acceptance */ + if (received_protocol) + exim_fail("received_protocol is set already\n"); + else + if (++i >= argc) badarg = TRUE; + else + received_protocol = string_copy_taint( + exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-oMr"), + GET_TAINTED); + + /* -oMs: Set sender host name */ + + else if (Ustrcmp(argrest, "s") == 0) + if (++i >= argc) badarg = TRUE; + else + sender_host_name = string_copy_taint( + exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-oMs"), + GET_TAINTED); + + /* -oMt: Set sender ident */ + + else if (Ustrcmp(argrest, "t") == 0) + if (++i >= argc) badarg = TRUE; + else + { + sender_ident_set = TRUE; + sender_ident = string_copy_taint( + exim_str_fail_toolong(argv[i], EXIM_IDENTUSER_MAX, "-oMt"), + GET_TAINTED); + } - else if (*argrest == 'r' || *argrest == 's') - { - int *tp = (*argrest == 'r')? - &arg_receive_timeout : &arg_smtp_receive_timeout; - if (argrest[1] == 0) - { - if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE); - } - else *tp = readconf_readtime(argrest + 1, 0, FALSE); - if (*tp < 0) - { - fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]); - exit(EXIT_FAILURE); - } + /* Else a bad argument */ + + else + badarg = TRUE; + } + break; + + /* -om: Me-too flag for aliases. Exim always does this. Some programs + seem to call this as -m (undocumented), so that is also accepted (see + above). */ + /* -oo: An ancient flag for old-style addresses which still seems to + crop up in some calls (see in SCO). */ + + case 'm': + case 'o': + if (*argrest) badarg = TRUE; + break; + + /* -oP : set pid file path for daemon + -oPX: delete pid file of daemon */ + + case 'P': + if (!f.running_in_test_harness && real_uid != root_uid && real_uid != exim_uid) + exim_fail("exim: only uid=%d or uid=%d can use -oP and -oPX " + "(uid=%d euid=%d | %d)\n", + root_uid, exim_uid, getuid(), geteuid(), real_uid); + if (!*argrest) + if (++i < argc) override_pid_file_path = argv[i]; + else badarg = TRUE; + else if (Ustrcmp(argrest, "X") == 0) delete_pid_file(); + else badarg = TRUE; + break; + + + /* -or : set timeout for non-SMTP acceptance + -os : set timeout for SMTP acceptance */ + + case 'r': + case 's': + { + int * tp = argrest[-1] == 'r' + ? &arg_receive_timeout : &arg_smtp_receive_timeout; + if (*argrest) + *tp = readconf_readtime(argrest, 0, FALSE); + else if (i+1 < argc) + *tp = readconf_readtime(argv[++i], 0, FALSE); + + if (*tp < 0) + exim_fail("exim: bad time value %s: abandoned\n", argv[i]); + } + break; + + /* -oX : Override local_interfaces and/or default daemon ports */ + /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */ + + case 'X': + if (*argrest || ++i >= argc) badarg = TRUE; + else override_local_interfaces = string_copy_taint( + exim_str_fail_toolong(argv[i], 1024, "-oX"), GET_TAINTED); + break; + + /* -oY: Override creation of daemon notifier socket */ + + case 'Y': + if (*argrest) badarg = TRUE; + else f.notifier_socket_en = FALSE; + break; + + /* Unknown -o argument */ + + default: + badarg = TRUE; } - - /* -oX : Override local_interfaces and/or default daemon ports */ - - else if (Ustrcmp(argrest, "X") == 0) - override_local_interfaces = argv[++i]; - - /* Unknown -o argument */ - - else badarg = TRUE; break; @@ -3079,200 +3715,193 @@ for (i = 1; i < argc; i++) /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval, which sets the host protocol and host name */ - if (*argrest == 0) - { - if (i+1 < argc) argrest = argv[++i]; else - { badarg = TRUE; break; } - } + if (!*argrest) + argrest = next_argv(argv, &i, argc, arg); - if (*argrest != 0) + if (*argrest) { - uschar *hn = Ustrchr(argrest, ':'); - if (hn == NULL) - { - received_protocol = argrest; - } + uschar * hn = Ustrchr(argrest, ':'); + + if (received_protocol) + exim_fail("received_protocol is set already\n"); + + if (!hn) + received_protocol = string_copy_taint( + exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p"), + GET_TAINTED); else { - received_protocol = string_copyn(argrest, hn - argrest); - sender_host_name = hn + 1; + (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p:"); + received_protocol = string_copyn_taint(argrest, hn - argrest, GET_TAINTED); + sender_host_name = string_copy_taint(hn + 1, GET_TAINTED); } } break; + /* -q: set up queue runs */ case 'q': - receiving_message = FALSE; - if (queue_interval >= 0) { - fprintf(stderr, "exim: -q specified more than once\n"); - exit(EXIT_FAILURE); - } + BOOL two_stage, first_del, force, thaw = FALSE, local; - /* -qq...: Do queue runs in a 2-stage manner */ + receiving_message = FALSE; - if (*argrest == 'q') - { - queue_2stage = TRUE; - argrest++; - } + /* -qq...: Do queue runs in a 2-stage manner */ - /* -qi...: Do only first (initial) deliveries */ + if ((two_stage = *argrest == 'q')) + argrest++; - if (*argrest == 'i') - { - queue_run_first_delivery = TRUE; - argrest++; - } + /* -qi...: Do only first (initial) deliveries */ - /* -qf...: Run the queue, forcing deliveries - -qff..: Ditto, forcing thawing as well */ + if ((first_del = *argrest == 'i')) + argrest++; - if (*argrest == 'f') - { - queue_run_force = TRUE; - if (*(++argrest) == 'f') - { - deliver_force_thaw = TRUE; - argrest++; - } - } + /* -qf...: Run the queue, forcing deliveries + -qff..: Ditto, forcing thawing as well */ - /* -q[f][f]l...: Run the queue only on local deliveries */ + if ((force = *argrest == 'f')) + if ((thaw = *++argrest == 'f')) + argrest++; - if (*argrest == 'l') - { - queue_run_local = TRUE; - argrest++; - } + /* -q[f][f]l...: Run the queue only on local deliveries */ - /* -q[f][f][l]: Run the queue, optionally forced, optionally local only, - optionally starting from a given message id. */ + if ((local = *argrest == 'l')) + argrest++; - if (*argrest == 0 && - (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1]))) - { - queue_interval = 0; - if (i+1 < argc && mac_ismsgid(argv[i+1])) - start_queue_run_id = argv[++i]; - if (i+1 < argc && mac_ismsgid(argv[i+1])) - stop_queue_run_id = argv[++i]; - } + /* -q[f][f][l][G]... Work on the named queue */ - /* -q[f][f][l]: Run the queue at regular intervals, optionally forced, - optionally local only. */ + if (*argrest == 'G') + { + int i; + for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++; + exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G"); + queue_name = string_copyn(argrest, i); + argrest += i; + if (*argrest == '/') argrest++; + } - else - { - if (*argrest != 0) - queue_interval = readconf_readtime(argrest, 0, FALSE); - else - queue_interval = readconf_readtime(argv[++i], 0, FALSE); - if (queue_interval <= 0) - { - fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]); - exit(EXIT_FAILURE); - } - } - break; + /* -q[f][f][l][G]: Run the queue, optionally forced, optionally local + only, optionally named, optionally starting from a given message id. */ + if (!(list_queue || count_queue)) + { + qrunner * q; - case 'R': /* Synonymous with -qR... */ - receiving_message = FALSE; + if ( !*argrest + && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1]))) + { + q = alloc_onetime_qrunner(); + if (i+1 < argc && mac_ismsgid(argv[i+1])) + start_queue_run_id = string_copy_taint(argv[++i], GET_TAINTED); + if (i+1 < argc && mac_ismsgid(argv[i+1])) + stop_queue_run_id = string_copy_taint(argv[++i], GET_TAINTED); + } - /* -Rf: As -R (below) but force all deliveries, - -Rff: Ditto, but also thaw all frozen messages, - -Rr: String is regex - -Rrf: Regex and force - -Rrff: Regex and force and thaw + /* -q[f][f][l][G/]: Run the queue at regular intervals, optionally + forced, optionally local only, optionally named. */ - in all cases provided there are no further characters in this - argument. */ + else + { + int intvl; + const uschar * s; - if (*argrest != 0) - { - int i; - for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++) - { - if (Ustrcmp(argrest, rsopts[i]) == 0) - { - if (i != 2) queue_run_force = TRUE; - if (i >= 2) deliver_selectstring_regex = TRUE; - if (i == 1 || i == 4) deliver_force_thaw = TRUE; - argrest += Ustrlen(rsopts[i]); - } - } - } + if (*argrest) s = argrest; + else if (++i < argc) { badarg = TRUE; break; } + else s = argv[i]; - /* -R: Set string to match in addresses for forced queue run to - pick out particular messages. */ + if ((intvl = readconf_readtime(s, 0, FALSE)) <= 0) + exim_fail("exim: bad time value %s: abandoned\n", argv[i]); - if (*argrest == 0) - { - if (i+1 < argc) deliver_selectstring = argv[++i]; else - { - fprintf(stderr, "exim: string expected after -R\n"); - exit(EXIT_FAILURE); - } - } - else deliver_selectstring = argrest; - break; + for (qrunner * qq = qrunners; qq; qq = qq->next) + if ( queue_name && qq->name && Ustrcmp(queue_name, qq->name) == 0 + || !queue_name && !qq->name) + exim_fail("exim: queue-runner specified more than once\n"); + q = alloc_qrunner(); + q->interval = intvl; + } - /* -r: an obsolete synonym for -f (see above) */ + q->name = *queue_name ? queue_name : NULL; /* will be NULL for the default queue */ + q->queue_run_force = force; + q->deliver_force_thaw = thaw; + q->queue_run_first_delivery = first_del; + q->queue_run_local = local; + q->queue_2stage = two_stage; + } + break; + } - /* -S: Like -R but works on sender. */ + case 'R': /* Synonymous with -qR... */ case 'S': /* Synonymous with -qS... */ - receiving_message = FALSE; + { + const uschar * tainted_selectstr; + uschar * s; - /* -Sf: As -S (below) but force all deliveries, - -Sff: Ditto, but also thaw all frozen messages, - -Sr: String is regex - -Srf: Regex and force - -Srff: Regex and force and thaw + receiving_message = FALSE; + + /* -Rf: As -R (below) but force all deliveries, + -Rff: Ditto, but also thaw all frozen messages, + -Rr: String is regex + -Rrf: Regex and force + -Rrff: Regex and force and thaw + + -S...: Like -R but works on sender. in all cases provided there are no further characters in this argument. */ - if (*argrest != 0) - { - int i; - for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++) - { - if (Ustrcmp(argrest, rsopts[i]) == 0) - { - if (i != 2) queue_run_force = TRUE; - if (i >= 2) deliver_selectstring_sender_regex = TRUE; - if (i == 1 || i == 4) deliver_force_thaw = TRUE; - argrest += Ustrlen(rsopts[i]); - } - } - } + if (!qrunners) alloc_onetime_qrunner(); + qrunners->queue_2stage = f.queue_2stage; + if (*argrest) + for (int i = 0; i < nelem(rsopts); i++) + if (Ustrcmp(argrest, rsopts[i]) == 0) + { + if (i != 2) qrunners->queue_run_force = TRUE; + if (i >= 2) + if (switchchar == 'R') + f.deliver_selectstring_regex = TRUE; + else + f.deliver_selectstring_sender_regex = TRUE; + if (i == 1 || i == 4) qrunners->deliver_force_thaw = TRUE; + argrest += Ustrlen(rsopts[i]); + } - /* -S: Set string to match in addresses for forced queue run to + /* -R or -S: Set string to match in addresses for forced queue run to pick out particular messages. */ - if (*argrest == 0) - { - if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else - { - fprintf(stderr, "exim: string expected after -S\n"); - exit(EXIT_FAILURE); - } + /* Avoid attacks from people providing very long strings, and do so before + we make copies. */ + if (*argrest) + tainted_selectstr = argrest; + else if (i+1 < argc) + tainted_selectstr = argv[++i]; + else + exim_fail("exim: string expected after %s\n", switchchar == 'R' ? "-R" : "-S"); + + s = string_copy_taint( + exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"), + GET_TAINTED); + + if (switchchar == 'R') + deliver_selectstring = s; + else + deliver_selectstring_sender = s; } - else deliver_selectstring_sender = argrest; break; + + /* -r: an obsolete synonym for -f (see above) */ + /* -Tqt is an option that is exclusively for use by the testing suite. It is not recognized in other circumstances. It allows for the setting up of explicit "queue times" so that various warning/retry things can be tested. Otherwise variability of clock ticks etc. cause problems. */ case 'T': - if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0) - fudged_queue_times = argv[++i]; + if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0 && ++i < argc) + fudged_queue_times = string_copy_taint(argv[i], GET_TAINTED); else badarg = TRUE; break; @@ -3280,7 +3909,7 @@ for (i = 1; i < argc; i++) /* -t: Set flag to extract recipients from body of message. */ case 't': - if (*argrest == 0) extract_recipients = TRUE; + if (!*argrest) extract_recipients = TRUE; /* -ti: Set flag to extract recipients from body of message, and also specify that dot does not end the message. */ @@ -3288,12 +3917,12 @@ for (i = 1; i < argc; i++) else if (Ustrcmp(argrest, "i") == 0) { extract_recipients = TRUE; - dot_ends = FALSE; + f.dot_ends = FALSE; } /* -tls-on-connect: don't wait for STARTTLS (for old clients) */ - #ifdef SUPPORT_TLS + #ifndef DISABLE_TLS else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE; #endif @@ -3312,7 +3941,7 @@ for (i = 1; i < argc; i++) /* -v: verify things - this is a very low-level debugging */ case 'v': - if (*argrest == 0) + if (!*argrest) { debug_selector |= D_v; debug_file = stderr; @@ -3332,21 +3961,28 @@ for (i = 1; i < argc; i++) As Exim is 8-bit clean, it just ignores this flag. */ case 'x': - if (*argrest != 0) badarg = TRUE; + if (*argrest) badarg = TRUE; break; /* -X: in sendmail: takes one parameter, logfile, and sends debugging logs to that file. We swallow the parameter and otherwise ignore it. */ - case 'X': - if (*argrest == '\0') - { - if (++i >= argc) - { - fprintf(stderr, "exim: string expected after -X\n"); - exit(EXIT_FAILURE); - } - } + case 'X': + if (!*argrest) + if (++i >= argc) + exim_fail("exim: string expected after -X\n"); + break; + + /* -z: a line of text to log */ + + case 'z': + if (!*argrest) + if (++i < argc) + log_oneline = string_copy_taint( + exim_str_fail_toolong(argv[i], 2048, "-z logtext"), + GET_TAINTED); + else + exim_fail("exim: file name expected after %s\n", argv[i-1]); break; /* All other initial characters are errors */ @@ -3359,78 +3995,67 @@ for (i = 1; i < argc; i++) /* Failed to recognize the option, or syntax error */ if (badarg) - { - fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete " + exim_fail("exim abandoned: unknown, malformed, or incomplete " "option %s\n", arg); - exit(EXIT_FAILURE); - } } /* If -R or -S have been specified without -q, assume a single queue run. */ -if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) && - queue_interval < 0) queue_interval = 0; + if ((deliver_selectstring || deliver_selectstring_sender) && !qrunners) + alloc_onetime_qrunner(); END_ARG: + store_pool = old_pool; + } + /* If usage_wanted is set we call the usage function - which never returns */ if (usage_wanted) exim_usage(called_as); /* Arguments have been processed. Check for incompatibilities. */ -if (( - (smtp_input || extract_recipients || recipients_arg < argc) && - (daemon_listen || queue_interval >= 0 || bi_option || - test_retry_arg >= 0 || test_rewrite_arg >= 0 || - filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action)) - ) || - ( - msg_action_arg > 0 && - (daemon_listen || queue_interval >= 0 || list_options || - (checking && msg_action != MSG_LOAD) || - bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0) - ) || - ( - (daemon_listen || queue_interval >= 0) && - (sender_address != NULL || list_options || list_queue || checking || - bi_option) - ) || - ( - daemon_listen && queue_interval == 0 - ) || - ( - inetd_wait_mode && queue_interval >= 0 - ) || - ( - list_options && - (checking || smtp_input || extract_recipients || - filter_test != FTEST_NONE || bi_option) - ) || - ( - verify_address_mode && - (address_test_mode || smtp_input || extract_recipients || - filter_test != FTEST_NONE || bi_option) - ) || - ( - address_test_mode && (smtp_input || extract_recipients || - filter_test != FTEST_NONE || bi_option) - ) || - ( - smtp_input && (sender_address != NULL || filter_test != FTEST_NONE || - extract_recipients) - ) || - ( - deliver_selectstring != NULL && queue_interval < 0 - ) || - ( - msg_action == MSG_LOAD && - (!expansion_test || expansion_test_message != NULL) - ) +if ( (smtp_input || extract_recipients || recipients_arg < argc) + && ( f.daemon_listen || qrunners || bi_option + || test_retry_arg >= 0 || test_rewrite_arg >= 0 + || filter_test != FTEST_NONE + || msg_action_arg > 0 && !one_msg_action + ) + || msg_action_arg > 0 + && ( f.daemon_listen || is_multiple_qrun() || list_options + || checking && msg_action != MSG_LOAD + || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0 + ) + || (f.daemon_listen || is_multiple_qrun()) + && ( sender_address || list_options || list_queue || checking + || bi_option + ) + || f.daemon_listen && is_onetime_qrun() + || f.inetd_wait_mode && qrunners + || list_options + && ( checking || smtp_input || extract_recipients + || filter_test != FTEST_NONE || bi_option + ) + || verify_address_mode + && ( f.address_test_mode || smtp_input || extract_recipients + || filter_test != FTEST_NONE || bi_option + ) + || f.address_test_mode + && ( smtp_input || extract_recipients || filter_test != FTEST_NONE + || bi_option + ) + || smtp_input + && (sender_address || filter_test != FTEST_NONE || extract_recipients) + || deliver_selectstring && !qrunners + || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message) + || atrn_mode + && ( f.daemon_listen || expansion_test || filter_test != FTEST_NONE + || checking /* || bi_option || info_stdout || receiving_message + || malware_test_file || list_queue || list_config || list_options + || version_printed || msg_action_arg > 0 || qrunners + */ + ) ) - { - fprintf(stderr, "exim: incompatible command-line options or arguments\n"); - exit(EXIT_FAILURE); - } + exim_fail("exim: incompatible command-line options or arguments\n"); /* If debugging is set up, set the file and the file descriptor to pass on to child processes. It should, of course, be 2 for stderr. Also, force the daemon @@ -3440,15 +4065,15 @@ if (debug_selector != 0) { debug_file = stderr; debug_fd = fileno(debug_file); - background_daemon = FALSE; - if (running_in_test_harness) millisleep(100); /* lets caller finish */ + f.background_daemon = FALSE; + testharness_pause_ms(100); /* lets caller finish */ if (debug_selector != D_v) /* -v only doesn't show this */ { debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n", version_string, (long int)real_uid, (long int)real_gid, (int)getpid(), debug_selector); if (!version_printed) - show_whats_supported(stderr); + show_whats_supported(FALSE); } } @@ -3466,7 +4091,7 @@ else { struct rlimit rlp; - #ifdef RLIMIT_NOFILE +#ifdef RLIMIT_NOFILE if (getrlimit(RLIMIT_NOFILE, &rlp) < 0) { log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s", @@ -3489,9 +4114,9 @@ else strerror(errno)); } } - #endif +#endif - #ifdef RLIMIT_NPROC +#ifdef RLIMIT_NPROC if (getrlimit(RLIMIT_NPROC, &rlp) < 0) { log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s", @@ -3499,20 +4124,20 @@ else rlp.rlim_cur = rlp.rlim_max = 0; } - #ifdef RLIM_INFINITY +# ifdef RLIM_INFINITY if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000) { rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY; - #else +# else if (rlp.rlim_cur < 1000) { rlp.rlim_cur = rlp.rlim_max = 1000; - #endif +# endif if (setrlimit(RLIMIT_NPROC, &rlp) < 0) log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s", strerror(errno)); } - #endif +#endif } /* Exim is normally entered as root (but some special configurations are @@ -3527,12 +4152,8 @@ check on the additional groups for the admin user privilege - can't do that till after reading the config, which might specify the exim gid. Therefore, save the group list here first. */ -group_count = getgroups(NGROUPS_MAX, group_list); -if (group_count < 0) - { - fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno)); - exit(EXIT_FAILURE); - } +if ((group_count = getgroups(nelem(group_list), group_list)) < 0) + exim_fail("exim: getgroups() failed: %s\n", strerror(errno)); /* There is a fundamental difference in some BSD systems in the matter of groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are @@ -3545,19 +4166,22 @@ over a single group - the current group, which is always the first group in the list. Calling setgroups() with zero groups on a "different" system results in an error return. The following code should cope with both types of system. + Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds + the "setgroups() with zero groups" - and changes the egid. + Thanks to that we had to stash the original_egid above, for use below + in the call to exim_setugid(). + However, if this process isn't running as root, setgroups() can't be used -since you have to be root to run it, even if throwing away groups. Not being -root here happens only in some unusual configurations. We just ignore the -error. */ +since you have to be root to run it, even if throwing away groups. +Except, sigh, for Hurd - where you can. +Not being root here happens only in some unusual configurations. */ -if (setgroups(0, NULL) != 0) - { - if (setgroups(1, group_list) != 0 && !unprivileged) - { - fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno)); - exit(EXIT_FAILURE); - } - } +if ( !unprivileged +#ifndef OS_SETGROUPS_ZERO_DROPS_ALL + && setgroups(0, NULL) != 0 +#endif + && setgroups(1, group_list) != 0) + exim_fail("exim: setgroups() failed: %s\n", strerror(errno)); /* If the configuration file name has been altered by an argument on the command line (either a new file name or a macro definition) and the caller is @@ -3577,10 +4201,10 @@ values (such as the path name). If running in the test harness, pretend that configuration file changes and macro definitions haven't happened. */ if (( /* EITHER */ - (!trusted_config || /* Config changed, or */ - !macros_trusted()) && /* impermissible macros and */ + (!f.trusted_config || /* Config changed, or */ + !macros_trusted(opt_D_used)) && /* impermissible macros and */ real_uid != root_uid && /* Not root, and */ - !running_in_test_harness /* Not fudged */ + !f.running_in_test_harness /* Not fudged */ ) || /* OR */ expansion_test /* expansion testing */ || /* OR */ @@ -3600,8 +4224,8 @@ if (( /* EITHER */ Note that if the invoker is Exim, the logs remain available. Messing with this causes unlogged successful deliveries. */ - if ((log_stderr != NULL) && (real_uid != exim_uid)) - really_exim = FALSE; + if (log_stderr && real_uid != exim_uid) + f.really_exim = FALSE; } /* Privilege is to be retained for the moment. It may be dropped later, @@ -3609,32 +4233,21 @@ depending on the job that this Exim process has been asked to do. For now, set the real uid to the effective so that subsequent re-execs of Exim are done by a privileged user. */ -else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective"); +else + exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective"); /* If testing a filter, open the file(s) now, before wasting time doing other setups and reading the message. */ -if ((filter_test & FTEST_SYSTEM) != 0) - { - filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0); - if (filter_sfd < 0) - { - fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile, +if (filter_test & FTEST_SYSTEM) + if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0) + exim_fail("exim: failed to open %s: %s\n", filter_test_sfile, strerror(errno)); - return EXIT_FAILURE; - } - } -if ((filter_test & FTEST_USER) != 0) - { - filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0); - if (filter_ufd < 0) - { - fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile, +if (filter_test & FTEST_USER) + if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0) + exim_fail("exim: failed to open %s: %s\n", filter_test_ufile, strerror(errno)); - return EXIT_FAILURE; - } - } /* Initialise lookup_list If debugging, already called above via version reporting. @@ -3646,12 +4259,67 @@ is equivalent to the ability to modify a setuid binary! This needs to happen before we read the main configuration. */ init_lookup_list(); +init_misc_mod_list(); + +/*XXX this excrescence could move to the testsuite standard config setup file */ +#ifdef SUPPORT_I18N +if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL; +#endif /* Read the main runtime configuration data; this gives up if there is a failure. It leaves the configuration file open so that the subsequent -configuration data for delivery can be read if needed. */ +configuration data for delivery can be read if needed. + +NOTE: immediately after opening the configuration file we change the working +directory to "/"! Later we change to $spool_directory. We do it there, because +during readconf_main() some expansion takes place already. */ + +/* Store the initial cwd before we change directories. Can be NULL if the +dir has already been unlinked. */ +initial_cwd = os_getcwd(NULL, 0); +if (!initial_cwd && errno) + exim_fail("exim: getting initial cwd failed: %s\n", strerror(errno)); + +if (initial_cwd && (strlen(CCS initial_cwd) >= BIG_BUFFER_SIZE)) + exim_fail("exim: initial cwd is far too long (%d)\n", Ustrlen(CCS initial_cwd)); + +/* checking: + -be[m] expansion test - + -b[fF] filter test new + -bh[c] host test - + -bmalware malware_test_file new + -brt retry test new + -brw rewrite test new + -bt address test - + -bv[s] address verify - + list_options: + -bP