X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/571b27158aa468eda77b1a20ed80bed1f342e15d..c0fb53b74e07fd17247960c998ffcb1f3c9f931f:/src/src/log.c diff --git a/src/src/log.c b/src/src/log.c index d12989b6f..d08200044 100644 --- a/src/src/log.c +++ b/src/src/log.c @@ -2,7 +2,7 @@ * Exim - an Internet mail transport agent * *************************************************/ -/* Copyright (c) University of Cambridge 1995 - 2016 */ +/* Copyright (c) University of Cambridge 1995 - 2018 */ /* See the file NOTICE for conditions of use and distribution. */ /* Functions for writing log files. The code for maintaining datestamped @@ -134,33 +134,36 @@ can get here if there is a failure to open the panic log.) Arguments: priority syslog priority - s the string to be written, the string may be modified! + s the string to be written Returns: nothing */ static void -write_syslog(int priority, uschar *s) +write_syslog(int priority, const uschar *s) { int len, pass; int linecount = 0; -if (running_in_test_harness) return; - -if (!syslog_timestamp) s += log_timezone ? 26 : 20; if (!syslog_pid && LOGGING(pid)) - memmove(s + pid_position[0], s + pid_position[1], pid_position[1] - pid_position[0]); + s = string_sprintf("%.*s%s", (int)pid_position[0], s, s + pid_position[1]); +if (!syslog_timestamp) + { + len = log_timezone ? 26 : 20; + if (LOGGING(millisec)) len += 4; + s += len; + } len = Ustrlen(s); #ifndef NO_OPENLOG -if (!syslog_open) +if (!syslog_open && !f.running_in_test_harness) { - #ifdef SYSLOG_LOG_PID +# ifdef SYSLOG_LOG_PID openlog(CS syslog_processname, LOG_PID|LOG_CONS, syslog_facility); - #else +# else openlog(CS syslog_processname, LOG_CONS, syslog_facility); - #endif +# endif syslog_open = TRUE; } #endif @@ -172,27 +175,35 @@ for (pass = 0; pass < 2; pass++) { int i; int tlen; - uschar *ss = s; + const uschar * ss = s; for (i = 1, tlen = len; tlen > 0; i++) { int plen = tlen; uschar *nlptr = Ustrchr(ss, '\n'); if (nlptr != NULL) plen = nlptr - ss; - #ifndef SYSLOG_LONG_LINES +#ifndef SYSLOG_LONG_LINES if (plen > MAX_SYSLOG_LEN) plen = MAX_SYSLOG_LEN; - #endif +#endif tlen -= plen; if (ss[plen] == '\n') tlen--; /* chars left */ - if (pass == 0) linecount++; else - { + if (pass == 0) + linecount++; + else if (f.running_in_test_harness) + if (linecount == 1) + fprintf(stderr, "SYSLOG: '%.*s'\n", plen, ss); + else + fprintf(stderr, "SYSLOG: '[%d%c%d] %.*s'\n", i, + ss[plen] == '\n' && tlen != 0 ? '\\' : '/', + linecount, plen, ss); + else if (linecount == 1) syslog(priority, "%.*s", plen, ss); else syslog(priority, "[%d%c%d] %.*s", i, - (ss[plen] == '\n' && tlen != 0)? '\\' : '/', + ss[plen] == '\n' && tlen != 0 ? '\\' : '/', linecount, plen, ss); - } + ss += plen; if (*ss == '\n') ss++; } @@ -227,12 +238,12 @@ if (s1) { write_syslog(LOG_CRIT, s1); if (debug_file) debug_printf("%s\n", s1); - if (log_stderr != NULL && log_stderr != debug_file) + if (log_stderr && log_stderr != debug_file) fprintf(log_stderr, "%s\n", s1); } -if (receive_call_bombout) receive_bomb_out(NULL, s2); /* does not return */ +if (f.receive_call_bombout) receive_bomb_out(NULL, s2); /* does not return */ if (smtp_input) smtp_closedown(s2); -exim_exit(EXIT_FAILURE); +exim_exit(EXIT_FAILURE, NULL); } @@ -427,20 +438,19 @@ char afterwards if at the start, otherwise one before. */ else if (string_datestamp_offset >= 0) { - uschar *from = buffer + string_datestamp_offset; - uschar *to = from + string_datestamp_length; + uschar * from = buffer + string_datestamp_offset; + uschar * to = from + string_datestamp_length; + if (from == buffer || from[-1] == '/') { if (!isalnum(*to)) to++; } else - { if (!isalnum(from[-1])) from--; - } - - /* This strcpy is ok, because we know that to is a substring of from. */ - Ustrcpy(from, to); + /* This copy is ok, because we know that to is a substring of from. But + due to overlap we must use memmove() not Ustrcpy(). */ + memmove(from, to, Ustrlen(to)+1); } /* If the file name is too long, it is an unrecoverable disaster */ @@ -544,23 +554,18 @@ Arguments: Returns: updated pointer */ -static uschar * -log_config_info(uschar *ptr, int flags) +static gstring * +log_config_info(gstring * g, int flags) { -Ustrcpy(ptr, "Exim configuration error"); -ptr += 24; +g = string_cat(g, US"Exim configuration error"); -if ((flags & (LOG_CONFIG_FOR & ~LOG_CONFIG)) != 0) - { - Ustrcpy(ptr, " for "); - return ptr + 5; - } +if (flags & (LOG_CONFIG_FOR & ~LOG_CONFIG)) + return string_cat(g, US" for "); -if ((flags & (LOG_CONFIG_IN & ~LOG_CONFIG)) != 0) - ptr += sprintf(CS ptr, " in line %d of %s", config_lineno, config_filename); +if (flags & (LOG_CONFIG_IN & ~LOG_CONFIG)) + g = string_fmt_append(g, " in line %d of %s", config_lineno, config_filename); -Ustrcpy(ptr, ":\n "); -return ptr + 4; +return string_catn(g, US":\n ", 4); } @@ -731,10 +736,10 @@ Returns: nothing void log_write(unsigned int selector, int flags, const char *format, ...) { -uschar * ptr; -int length; int paniclogfd; ssize_t written_len; +gstring gs = { .size = LOG_BUFFER_SIZE-1, .ptr = 0, .s = log_buffer }; +gstring * g; va_list ap; /* If panic_recurseflag is set, we have failed to open the panic log. This is @@ -744,11 +749,11 @@ original log line that caused the problem. Afterwards, expire. */ if (panic_recurseflag) { - uschar *extra = (panic_save_buffer == NULL)? US"" : panic_save_buffer; - if (debug_file != NULL) debug_printf("%s%s", extra, log_buffer); - if (log_stderr != NULL && log_stderr != debug_file) + uschar *extra = panic_save_buffer ? panic_save_buffer : US""; + if (debug_file) debug_printf("%s%s", extra, log_buffer); + if (log_stderr && log_stderr != debug_file) fprintf(log_stderr, "%s%s", extra, log_buffer); - if (*extra != 0) write_syslog(LOG_CRIT, extra); + if (*extra) write_syslog(LOG_CRIT, extra); write_syslog(LOG_CRIT, log_buffer); die(US"exim: could not open panic log - aborting: see message(s) above", US"Unexpected log failure, please try later"); @@ -761,7 +766,7 @@ if (!log_buffer) if (!(log_buffer = US malloc(LOG_BUFFER_SIZE))) { fprintf(stderr, "exim: failed to get store for log buffer\n"); - exim_exit(EXIT_FAILURE); + exim_exit(EXIT_FAILURE, NULL); } /* If we haven't already done so, inspect the setting of log_file_path to @@ -785,12 +790,14 @@ if (!path_inspected) int sep = ':'; /* Fixed separator - outside use */ uschar *s; const uschar *ss = log_file_path; + logging_mode = 0; while ((s = string_nextinlist(&ss, &sep, log_buffer, LOG_BUFFER_SIZE))) { if (Ustrcmp(s, "syslog") == 0) logging_mode |= LOG_MODE_SYSLOG; - else if ((logging_mode & LOG_MODE_FILE) != 0) multiple = TRUE; + else if (logging_mode & LOG_MODE_FILE) + multiple = TRUE; else { logging_mode |= LOG_MODE_FILE; @@ -820,7 +827,7 @@ if (!path_inspected) /* Set up the ultimate default if necessary. Then revert to the old store pool, and record that we've sorted out the path. */ - if ((logging_mode & LOG_MODE_FILE) != 0 && file_path[0] == 0) + if (logging_mode & LOG_MODE_FILE && !file_path[0]) file_path = string_sprintf("%s/log/%%slog", spool_directory); store_pool = old_pool; path_inspected = TRUE; @@ -839,10 +846,8 @@ in one go so that it doesn't get split when multi-processing. */ DEBUG(D_any|D_v) { int i; - ptr = log_buffer; - Ustrcpy(ptr, "LOG:"); - ptr += 4; + g = string_catn(&gs, US"LOG:", 4); /* Show the selector that was passed into the call. */ @@ -850,41 +855,43 @@ DEBUG(D_any|D_v) { unsigned int bitnum = log_options[i].bit; if (bitnum < BITWORDSIZE && selector == BIT(bitnum)) - { - *ptr++ = ' '; - Ustrcpy(ptr, log_options[i].name); - while (*ptr) ptr++; - } + g = string_fmt_append(g, " %s", log_options[i].name); } - sprintf(CS ptr, "%s%s%s%s\n ", - ((flags & LOG_MAIN) != 0)? " MAIN" : "", - ((flags & LOG_PANIC) != 0)? " PANIC" : "", - ((flags & LOG_PANIC_DIE) == LOG_PANIC_DIE)? " DIE" : "", - ((flags & LOG_REJECT) != 0)? " REJECT" : ""); + g = string_fmt_append(g, "%s%s%s%s\n ", + flags & LOG_MAIN ? " MAIN" : "", + flags & LOG_PANIC ? " PANIC" : "", + (flags & LOG_PANIC_DIE) == LOG_PANIC_DIE ? " DIE" : "", + flags & LOG_REJECT ? " REJECT" : ""); - while(*ptr) ptr++; - if ((flags & LOG_CONFIG) != 0) ptr = log_config_info(ptr, flags); + if (flags & LOG_CONFIG) g = log_config_info(g, flags); va_start(ap, format); - if (!string_vformat(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer)-1, format, ap)) - Ustrcpy(ptr, "**** log string overflowed log buffer ****"); + i = g->ptr; + if (!string_vformat(g, FALSE, format, ap)) + { + g->ptr = i; + g = string_cat(g, US"**** log string overflowed log buffer ****"); + } va_end(ap); - while(*ptr) ptr++; - Ustrcat(ptr, "\n"); - debug_printf("%s", log_buffer); - } + g->size = LOG_BUFFER_SIZE; + g = string_catn(g, US"\n", 1); + debug_printf("%s", string_from_gstring(g)); + gs.size = LOG_BUFFER_SIZE-1; /* Having used the buffer for debug output, */ + gs.ptr = 0; /* reset it for the real use. */ + gs.s = log_buffer; + } /* If no log file is specified, we are in a mess. */ -if ((flags & (LOG_MAIN|LOG_PANIC|LOG_REJECT)) == 0) +if (!(flags & (LOG_MAIN|LOG_PANIC|LOG_REJECT))) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_write called with no log " "flags set"); /* There are some weird circumstances in which logging is disabled. */ -if (disable_logging) +if (f.disable_logging) { DEBUG(D_any) debug_printf("log writing disabled\n"); return; @@ -897,69 +904,76 @@ if (!write_rejectlog) flags &= ~LOG_REJECT; /* Create the main message in the log buffer. Do not include the message id when called by a utility. */ -ptr = log_buffer; -ptr += sprintf(CS ptr, "%s ", tod_stamp(tod_log)); +g = string_fmt_append(&gs, "%s ", tod_stamp(tod_log)); if (LOGGING(pid)) { - if (!syslog_pid) pid_position[0] = ptr - log_buffer; /* remember begin … */ - ptr += sprintf(CS ptr, "[%d] ", (int)getpid()); - if (!syslog_pid) pid_position[1] = ptr - log_buffer; /* … and end+1 of the PID */ + if (!syslog_pid) pid_position[0] = g->ptr; /* remember begin … */ + g = string_fmt_append(g, "[%d] ", (int)getpid()); + if (!syslog_pid) pid_position[1] = g->ptr; /* … and end+1 of the PID */ } -if (really_exim && message_id[0] != 0) - ptr += sprintf(CS ptr, "%s ", message_id); +if (f.really_exim && message_id[0] != 0) + g = string_fmt_append(g, "%s ", message_id); -if ((flags & LOG_CONFIG) != 0) ptr = log_config_info(ptr, flags); +if (flags & LOG_CONFIG) + g = log_config_info(g, flags); va_start(ap, format); -if (!string_vformat(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer)-1, format, ap)) - Ustrcpy(ptr, "**** log string overflowed log buffer ****\n"); -while(*ptr) ptr++; + { + int i = g->ptr; + if (!string_vformat(g, FALSE, format, ap)) + { + g->ptr = i; + g = string_cat(g, US"**** log string overflowed log buffer ****\n"); + } + } va_end(ap); /* Add the raw, unrewritten, sender to the message if required. This is done this way because it kind of fits with LOG_RECIPIENTS. */ -if ((flags & LOG_SENDER) != 0 && - ptr < log_buffer + LOG_BUFFER_SIZE - 10 - Ustrlen(raw_sender)) - ptr += sprintf(CS ptr, " from <%s>", raw_sender); +if ( flags & LOG_SENDER + && g->ptr < LOG_BUFFER_SIZE - 10 - Ustrlen(raw_sender)) + g = string_fmt_append(g, " from <%s>", raw_sender); /* Add list of recipients to the message if required; the raw list, before rewriting, was saved in raw_recipients. There may be none, if an ACL discarded them all. */ -if ((flags & LOG_RECIPIENTS) != 0 && ptr < log_buffer + LOG_BUFFER_SIZE - 6 && - raw_recipients_count > 0) +if ( flags & LOG_RECIPIENTS + && g->ptr < LOG_BUFFER_SIZE - 6 + && raw_recipients_count > 0) { int i; - ptr += sprintf(CS ptr, " for"); + g = string_fmt_append(g, " for"); for (i = 0; i < raw_recipients_count; i++) { uschar * s = raw_recipients[i]; - if (log_buffer + LOG_BUFFER_SIZE - ptr < Ustrlen(s) + 3) break; - ptr += sprintf(CS ptr, " %s", s); + if (LOG_BUFFER_SIZE - g->ptr < Ustrlen(s) + 3) break; + g = string_fmt_append(g, " %s", s); } } -ptr += sprintf(CS ptr, "\n"); -length = ptr - log_buffer; +g = string_catn(g, US"\n", 1); +string_from_gstring(g); /* Handle loggable errors when running a utility, or when address testing. Write to log_stderr unless debugging (when it will already have been written), or unless there is no log_stderr (expn called from daemon, for example). */ -if (!really_exim || log_testing_mode) +if (!f.really_exim || f.log_testing_mode) { - if (debug_selector == 0 && log_stderr != NULL && - (selector == 0 || (selector & log_selector[0]) != 0)) - { + if ( !debug_selector + && log_stderr + && (selector == 0 || (selector & log_selector[0]) != 0) + ) if (host_checking) fprintf(log_stderr, "LOG: %s", CS(log_buffer + 20)); /* no timestamp */ else fprintf(log_stderr, "%s", CS log_buffer); - } - if ((flags & LOG_PANIC_DIE) == LOG_PANIC_DIE) exim_exit(EXIT_FAILURE); + + if ((flags & LOG_PANIC_DIE) == LOG_PANIC_DIE) exim_exit(EXIT_FAILURE, US""); return; } @@ -1015,10 +1029,10 @@ if ( flags & LOG_MAIN /* Failing to write to the log is disastrous */ - written_len = write_to_fd_buf(mainlogfd, log_buffer, length); - if (written_len != length) + written_len = write_to_fd_buf(mainlogfd, g->s, g->ptr); + if (written_len != g->ptr) { - log_write_failed(US"main log", length, written_len); + log_write_failed(US"main log", g->ptr, written_len); /* That function does not return */ } } @@ -1029,40 +1043,45 @@ which case the flags are altered above. If there are any header lines (i.e. if the rejection is happening after the DATA phase), log the recipients and the headers. */ -if ((flags & LOG_REJECT) != 0) +if (flags & LOG_REJECT) { header_line *h; - if (header_list != NULL && LOGGING(rejected_header)) + if (header_list && LOGGING(rejected_header)) { + uschar * p = g->s + g->ptr; + int i; + if (recipients_count > 0) { - int i; - /* List the sender */ - string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), + string_format(p, LOG_BUFFER_SIZE - g->ptr, "Envelope-from: <%s>\n", sender_address); - while (*ptr) ptr++; + while (*p) p++; + g->ptr = p - g->s; /* List up to 5 recipients */ - string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), + string_format(p, LOG_BUFFER_SIZE - g->ptr, "Envelope-to: <%s>\n", recipients_list[0].address); - while (*ptr) ptr++; + while (*p) p++; + g->ptr = p - g->s; for (i = 1; i < recipients_count && i < 5; i++) { - string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), " <%s>\n", + string_format(p, LOG_BUFFER_SIZE - g->ptr, " <%s>\n", recipients_list[i].address); - while (*ptr) ptr++; + while (*p) p++; + g->ptr = p - g->s; } if (i < recipients_count) { - (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), + string_format(p, LOG_BUFFER_SIZE - g->ptr, " ...\n"); - while (*ptr) ptr++; + while (*p) p++; + g->ptr = p - g->s; } } @@ -1070,33 +1089,31 @@ if ((flags & LOG_REJECT) != 0) for (h = header_list; h; h = h->next) if (h->text) { - BOOL fitted = string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), + BOOL fitted = string_format(p, LOG_BUFFER_SIZE - g->ptr, "%c %s", h->type, h->text); - while(*ptr) ptr++; + while (*p) p++; + g->ptr = p - g->s; if (!fitted) /* Buffer is full; truncate */ { - ptr -= 100; /* For message and separator */ - if (ptr[-1] == '\n') ptr--; - Ustrcpy(ptr, "\n*** truncated ***\n"); - while (*ptr) ptr++; + g->ptr -= 100; /* For message and separator */ + if (g->s[g->ptr-1] == '\n') g->ptr--; + g = string_cat(g, US"\n*** truncated ***\n"); break; } } - - length = ptr - log_buffer; } /* Write to syslog or to a log file */ - if ((logging_mode & LOG_MODE_SYSLOG) != 0 && - (syslog_duplication || (flags & LOG_PANIC) == 0)) - write_syslog(LOG_NOTICE, log_buffer); + if ( logging_mode & LOG_MODE_SYSLOG + && (syslog_duplication || !(flags & LOG_PANIC))) + write_syslog(LOG_NOTICE, string_from_gstring(g)); /* Check for a change to the rejectlog file name when datestamping is in operation. This happens at midnight, at which point we want to roll over the file. Closing it has the desired effect. */ - if ((logging_mode & LOG_MODE_FILE) != 0) + if (logging_mode & LOG_MODE_FILE) { struct stat statbuf; @@ -1118,7 +1135,6 @@ if ((flags & LOG_REJECT) != 0) happening. */ if (rejectlogfd >= 0) - { if (Ustat(rejectlog_name, &statbuf) < 0 || statbuf.st_ino != rejectlog_inode) { @@ -1126,7 +1142,6 @@ if ((flags & LOG_REJECT) != 0) rejectlogfd = -1; rejectlog_inode = 0; } - } /* Open the file if necessary, and write the data */ @@ -1136,10 +1151,10 @@ if ((flags & LOG_REJECT) != 0) if (fstat(rejectlogfd, &statbuf) >= 0) rejectlog_inode = statbuf.st_ino; } - written_len = write_to_fd_buf(rejectlogfd, log_buffer, length); - if (written_len != length) + written_len = write_to_fd_buf(rejectlogfd, g->s, g->ptr); + if (written_len != g->ptr) { - log_write_failed(US"reject log", length, written_len); + log_write_failed(US"reject log", g->ptr, written_len); /* That function does not return */ } } @@ -1151,37 +1166,37 @@ open, there will be a recursive call to log_write(). We detect this above and attempt to write to the system log as a last-ditch try at telling somebody. In all cases except mua_wrapper, try to write to log_stderr. */ -if ((flags & LOG_PANIC) != 0) +if (flags & LOG_PANIC) { - if (log_stderr != NULL && log_stderr != debug_file && !mua_wrapper) - fprintf(log_stderr, "%s", CS log_buffer); + if (log_stderr && log_stderr != debug_file && !mua_wrapper) + fprintf(log_stderr, "%s", CS string_from_gstring(g)); - if ((logging_mode & LOG_MODE_SYSLOG) != 0) + if (logging_mode & LOG_MODE_SYSLOG) write_syslog(LOG_ALERT, log_buffer); /* If this panic logging was caused by a failure to open the main log, the original log line is in panic_save_buffer. Make an attempt to write it. */ - if ((logging_mode & LOG_MODE_FILE) != 0) + if (logging_mode & LOG_MODE_FILE) { panic_recurseflag = TRUE; open_log(&paniclogfd, lt_panic, NULL); /* Won't return on failure */ panic_recurseflag = FALSE; - if (panic_save_buffer != NULL) + if (panic_save_buffer) { int i = write(paniclogfd, panic_save_buffer, Ustrlen(panic_save_buffer)); i = i; /* compiler quietening */ } - written_len = write_to_fd_buf(paniclogfd, log_buffer, length); - if (written_len != length) + written_len = write_to_fd_buf(paniclogfd, g->s, g->ptr); + if (written_len != g->ptr) { int save_errno = errno; write_syslog(LOG_CRIT, log_buffer); sprintf(CS log_buffer, "write failed on panic log: length=%d result=%d " - "errno=%d (%s)", length, (int)written_len, save_errno, strerror(save_errno)); - write_syslog(LOG_CRIT, log_buffer); + "errno=%d (%s)", g->ptr, (int)written_len, save_errno, strerror(save_errno)); + write_syslog(LOG_CRIT, string_from_gstring(g)); flags |= LOG_PANIC_DIE; }