Include address declared malformed, in error message

[exim.git] / src / src / exim.c

diff --git a/src/src/exim.c b/src/src/exim.c
index 25464f799a634469ceec25cd1172b396d4e2f94f..8d13bd4782a94563497a8e58919ca459501beeb0 100644 (file)
--- a/src/src/exim.c
+++ b/src/src/exim.c
@@ -2,9 +2,10 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 

+/* Copyright (c) The Exim Maintainers 2020 - 2022 */

 /* Copyright (c) University of Cambridge 1995 - 2018 */
 /* Copyright (c) University of Cambridge 1995 - 2018 */

-/* Copyright (c) The Exim Maintainers 2020 */

 /* See the file NOTICE for conditions of use and distribution. */
 /* 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.
 
 
 /* The main function: entry point, initialization, and high-level control.


@@ -17,6 +18,13 @@ Also a few functions that don't naturally fit elsewhere. */
 # include <gnu/libc-version.h>
 #endif
 
 # include <gnu/libc-version.h>
 #endif
 

+#ifndef _TIME_H
+# include <time.h>
+#endif
+#ifndef NO_EXECINFO
+# include <execinfo.h>
+#endif
+

 #ifdef USE_GNUTLS
 # include <gnutls/gnutls.h>
 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
 #ifdef USE_GNUTLS
 # include <gnutls/gnutls.h>
 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)


@@ -24,10 +32,6 @@ Also a few functions that don't naturally fit elsewhere. */
 # endif
 #endif
 
 # endif
 #endif
 

-#ifndef _TIME_H
-# include <time.h>
-#endif
-

 extern void init_lookup_list(void);
 
 
 extern void init_lookup_list(void);
 
 


@@ -40,31 +44,31 @@ 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
 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 *
 
 static void *

-function_store_get(size_t size)
+function_store_malloc(PCRE2_SIZE size, void * tag)

 {
 {

-/* For now, regard all RE results as potentially tainted.  We might need
-more intelligence on this point. */
-return store_get((int)size, TRUE);
+return store_malloc((int)size);

 }
 
 static void
 }
 
 static void

-function_dummy_free(void * 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 *
 
 static void *

-function_store_malloc(size_t size)
+function_store_get(PCRE2_SIZE size, void * tag)

 {
 {

-return store_malloc((int)size);
+return store_get((int)size, GET_UNTAINTED);    /* loses track of taint */

 }
 
 static void
 }
 
 static void

-function_store_free(void * block)
+function_store_nullfree(void * block, void * tag)

 {
 {

-store_free(block);

 }
 
 
 }
 
 


@@ -80,44 +84,16 @@ 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(const 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(CCS pattern, options, CCSS &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);

 }
 
 
 }
 
 


@@ -128,7 +104,10 @@ return yield;
 *************************************************/
 
 /* This function runs a regular expression match, and sets up the pointers to
 *************************************************/
 
 /* 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
 
 Arguments:
   re          the compiled expression


@@ -138,32 +117,78 @@ Arguments:
               if >= 0 setup from setup+1 onwards,
                 excluding the full matched string
 
               if >= 0 setup from setup+1 onwards,
                 excluding the full matched string
 

-Returns:      TRUE or FALSE
+Returns:      TRUE if matched, or FALSE

 */
 
 BOOL
 */
 
 BOOL

-regex_match_and_setup(const pcre *re, const 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)];
-uschar * s = string_copy(subject);     /* de-constifying */
-int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
-  PCRE_EOPT | options, ovector, nelem(ovector));
-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)))

   {
   {

+  PCRE2_SIZE * ovec = pcre2_get_ovector_pointer(md);
+  res = pcre2_get_ovector_count(md);

   expand_nmax = setup < 0 ? 0 : setup + 1;
   expand_nmax = setup < 0 ? 0 : setup + 1;

-  for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
+  for (int matchnum = setup < 0 ? 0 : 1; matchnum < res; matchnum++)

     {
     {

-    expand_nstring[expand_nmax] = s + 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--;
   }
     }
   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;
 }
 
 
 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;
+}
+

 
 
 /*************************************************
 
 
 /*************************************************


@@ -178,15 +203,16 @@ Returns:   nothing
 */
 
 void
 */
 
 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;
 {
 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
 gstring * g;
 int len;

+uschar * s;

 va_list ap;
 
 g = string_fmt_append(&gs, "%5d ", (int)getpid());
 va_list ap;
 
 g = string_fmt_append(&gs, "%5d ", (int)getpid());

-len = g->ptr;
+len = gstring_length(g);

 va_start(ap, format);
 if (!string_vformat(g, 0, format, ap))
   {
 va_start(ap, format);
 if (!string_vformat(g, 0, format, ap))
   {


@@ -194,8 +220,7 @@ if (!string_vformat(g, 0, format, ap))
   g = string_cat(&gs, US"**** string overflowed buffer ****");
   }
 g = string_catn(g, US"\n", 1);
   g = string_cat(&gs, US"**** string overflowed buffer ****");
   }
 g = string_catn(g, US"\n", 1);

-string_from_gstring(g);
-process_info_len = g->ptr;
+process_info_len = len_string_from_gstring(g, &s);

 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
 va_end(ap);
 }
 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
 va_end(ap);
 }


@@ -211,6 +236,73 @@ exit(1);
 }
 
 
 }
 
 

+/***********************************************
+*            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, "---");
+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)
+{
+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 (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)", 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
+
+

 /*************************************************
 *             Handler for SIGUSR1                *
 *************************************************/
 /*************************************************
 *             Handler for SIGUSR1                *
 *************************************************/


@@ -233,18 +325,8 @@ int fd;
 
 os_restarting_signal(sig, usr1_handler);
 
 
 os_restarting_signal(sig, usr1_handler);
 

-if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 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
 
 /* 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


@@ -441,9 +523,10 @@ function prepares for the time when things are faster - and it also copes with
 clocks that go backwards.
 
 Arguments:
 clocks that go backwards.
 
 Arguments:

-  tgt_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.
                  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)
 
   resolution   The resolution that was used to divide the microseconds
                  (1 for maildir, larger for message ids)
 


@@ -451,7 +534,7 @@ Returns:       nothing
 */
 
 void
 */
 
 void

-exim_wait_tick(struct timeval * tgt_tv, int resolution)
+exim_wait_tick(struct timeval * prev_tv, int resolution)

 {
 struct timeval now_tv;
 long int now_true_usec;
 {
 struct timeval now_tv;
 long int now_true_usec;


@@ -460,13 +543,13 @@ exim_gettime(&now_tv);
 now_true_usec = now_tv.tv_usec;
 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
 
 now_true_usec = now_tv.tv_usec;
 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
 

-while (exim_tvcmp(&now_tv, tgt_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;
   {
   struct itimerval itval;
   itval.it_interval.tv_sec = 0;
   itval.it_interval.tv_usec = 0;

-  itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
-  itval.it_value.tv_usec = tgt_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"
 
   /* 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"


@@ -484,7 +567,7 @@ while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
     if (!f.running_in_test_harness)
       {
       debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
     if (!f.running_in_test_harness)
       {
       debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",

-        tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
+        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);
                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);


@@ -496,10 +579,11 @@ while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
   /* Be prapared to go around if the kernel does not implement subtick
   granularity (GNU Hurd) */
 
   /* Be prapared to go around if the kernel does not implement subtick
   granularity (GNU Hurd) */
 

-  (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;
   }
   now_true_usec = now_tv.tv_usec;
   now_tv.tv_usec = (now_true_usec/resolution) * resolution;
   }

+*prev_tv = now_tv;

 }
 
 
 }
 
 


@@ -661,7 +745,7 @@ Returns:     nothing; bombs out on failure
 */
 
 void
 */
 
 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();
 {
 uid_t euid = geteuid();
 gid_t egid = getegid();


@@ -757,9 +841,29 @@ exim_fail(const char * fmt, ...)
 va_list ap;
 va_start(ap, fmt);
 vfprintf(stderr, fmt, ap);
 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);
 }
 
 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)
+{
+exim_len_fail_toolong(Ustrlen(item), maxlen, description);
+return item;
+}
+

 /* 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() called from exim_chown()/exim_fchown() on failure
 of chown()/fchown().  See src/functions.h for more explanation */
 int


@@ -851,7 +955,7 @@ else
   int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
     -1, -1, NULL, NULL, NULL);
   if (rc == FAIL) *exit_value = 2;
   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;

   }
 }
 
   }
 }
 


@@ -862,54 +966,66 @@ else
 *************************************************/
 
 static void
 *************************************************/
 
 static void

-show_db_version(FILE * f)
+show_string(BOOL is_stdout, gstring * g)
+{
+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)

 {
 #ifdef DB_VERSION_STRING
 DEBUG(D_any)
   {
 {
 #ifdef DB_VERSION_STRING
 DEBUG(D_any)
   {

-  fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
-  fprintf(f, "                      Runtime: %s\n",
+  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
     db_version(NULL, NULL, NULL));
   }
 else

-  fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
+  g = string_fmt_append(g, "Berkeley DB: %s\n", DB_VERSION_STRING);

 
 #elif defined(BTREEVERSION) && defined(HASHVERSION)
 
 #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)
 
 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)

-fprintf(f, "Probably ndbm\n");
+g = string_cat(g, US"Probably ndbm\n");

 #elif defined(USE_TDB)
 #elif defined(USE_TDB)

-fprintf(f, "Using tdb\n");
+g = string_cat(g, US"Using tdb\n");

 #else
 #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
 #endif

+return g;

 }
 
 
 /* This function is called for -bV/--version and for -d to output the optional
 features of the current Exim binary.
 
 }
 
 
 /* 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
+Arguments:  BOOL, true for stdout else debug channel

 Returns:    nothing
 */
 
 static void
 Returns:    nothing
 */
 
 static void

-show_whats_supported(FILE * fp)
+show_whats_supported(BOOL is_stdout)

 {
 rmark reset_point = store_mark();
 {
 rmark reset_point = store_mark();

-gstring * g;
-DEBUG(D_any) {} else show_db_version(fp);
+gstring * g = NULL;
+
+DEBUG(D_any) {} else g = show_db_version(g);

 
 

-g = string_cat(NULL, US"Support for:");
+g = string_cat(g, US"Support for:");

 #ifdef SUPPORT_CRYPTEQ
   g = string_cat(g, US" crypteq");
 #endif
 #ifdef SUPPORT_CRYPTEQ
   g = string_cat(g, US" crypteq");
 #endif


@@ -974,7 +1090,7 @@ g = string_cat(NULL, US"Support for:");
   g = string_cat(g, US" OCSP");
 #endif
 #ifndef DISABLE_PIPE_CONNECT
   g = string_cat(g, US" OCSP");
 #endif
 #ifndef DISABLE_PIPE_CONNECT

-  g = string_cat(g, US" PIPE_CONNECT");
+  g = string_cat(g, US" PIPECONNECT");

 #endif
 #ifndef DISABLE_PRDR
   g = string_cat(g, US" PRDR");
 #endif
 #ifndef DISABLE_PRDR
   g = string_cat(g, US" PRDR");


@@ -983,7 +1099,7 @@ g = string_cat(NULL, US"Support for:");
   g = string_cat(g, US" PROXY");
 #endif
 #ifndef DISABLE_QUEUE_RAMP
   g = string_cat(g, US" PROXY");
 #endif
 #ifndef DISABLE_QUEUE_RAMP

-  g = string_cat(g, US" Experimental_Queue_Ramp");
+  g = string_cat(g, US" Queue_Ramp");

 #endif
 #ifdef SUPPORT_SOCKS
   g = string_cat(g, US" SOCKS");
 #endif
 #ifdef SUPPORT_SOCKS
   g = string_cat(g, US" SOCKS");


@@ -1010,12 +1126,12 @@ g = string_cat(NULL, US"Support for:");
 #ifdef EXPERIMENTAL_DSN_INFO
   g = string_cat(g, US" Experimental_DSN_info");
 #endif
 #ifdef EXPERIMENTAL_DSN_INFO
   g = string_cat(g, US" Experimental_DSN_info");
 #endif

+#ifdef EXPERIMENTAL_ESMTP_LIMITS
+  g = string_cat(g, US" Experimental_ESMTP_Limits");
+#endif

 #ifdef EXPERIMENTAL_QUEUEFILE
   g = string_cat(g, US" Experimental_QUEUEFILE");
 #endif
 #ifdef EXPERIMENTAL_QUEUEFILE
   g = string_cat(g, US" Experimental_QUEUEFILE");
 #endif

-#if defined(EXPERIMENTAL_SRS_ALT)
-  g = string_cat(g, US" Experimental_SRS");
-#endif

 g = string_cat(g, US"\n");
 
 g = string_cat(g, US"Lookups (built-in):");
 g = string_cat(g, US"\n");
 
 g = string_cat(g, US"Lookups (built-in):");


@@ -1085,6 +1201,7 @@ g = transport_show_supported(g);
 #ifdef WITH_CONTENT_SCAN
 g = malware_show_supported(g);
 #endif
 #ifdef WITH_CONTENT_SCAN
 g = malware_show_supported(g);
 #endif

+show_string(is_stdout, g); g = NULL;

 
 if (fixed_never_users[0] > 0)
   {
 
 if (fixed_never_users[0] > 0)
   {


@@ -1096,52 +1213,56 @@ if (fixed_never_users[0] > 0)
   }
 
 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
   }
 
 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);

-fputs(CS string_from_gstring(g), fp);

 
 

-fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
+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. */
 
 /* 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 {
+DEBUG(D_any)
+  {

 
 /* clang defines __GNUC__ (at least, for me) so test for it first */
 #if defined(__clang__)
 
 /* clang defines __GNUC__ (at least, for me) so test for it first */
 #if defined(__clang__)

-  fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
+  g = string_fmt_append(g, "Compiler: CLang [%s]\n", __clang_version__);

 #elif defined(__GNUC__)
 #elif defined(__GNUC__)

-  fprintf(fp, "Compiler: GCC [%s]\n",

 # ifdef __VERSION__
 # ifdef __VERSION__

-      __VERSION__
+  g = string_fmt_append(g, "Compiler: GCC [%s]\n", __VERSION__);

 # else
 # else

-      "? unknown version ?"
+  g = string_fmt_append(g, "Compiler: GCC [%s]\n", "? unknown version ?";

 # endif
 # endif

-      );

 #else
 #else

-  fprintf(fp, "Compiler: <unknown>\n");
+  g = string_cat(g, US"Compiler: <unknown>\n");

 #endif
 
 #if defined(__GLIBC__) && !defined(__UCLIBC__)
 #endif
 
 #if defined(__GLIBC__) && !defined(__UCLIBC__)

-  fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
+  g = string_fmt_append(g, "Library version: Glibc: Compile: %d.%d\n",

                __GLIBC__, __GLIBC_MINOR__);
   if (__GLIBC_PREREQ(2, 1))
                __GLIBC__, __GLIBC_MINOR__);
   if (__GLIBC_PREREQ(2, 1))

-    fprintf(fp, "                        Runtime: %s\n",
+    g = string_fmt_append(g, "                        Runtime: %s\n",

                gnu_get_libc_version());
 #endif
 
                gnu_get_libc_version());
 #endif
 

-show_db_version(fp);
+g = show_db_version(g);

 
 #ifndef DISABLE_TLS
 
 #ifndef DISABLE_TLS

-  tls_version_report(fp);
+  g = tls_version_report(g);

 #endif
 #ifdef SUPPORT_I18N
 #endif
 #ifdef SUPPORT_I18N

-  utf8_version_report(fp);
+  g = utf8_version_report(g);
+#endif
+#ifdef SUPPORT_DMARC
+  g = dmarc_version_report(g);

 #endif
 #ifdef SUPPORT_SPF
 #endif
 #ifdef SUPPORT_SPF

-  spf_lib_version_report(fp);
+  g = spf_lib_version_report(g);

 #endif
 
 #endif
 

-  for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
-    if (authi->version_report)
-      (*authi->version_report)(fp);
+show_string(is_stdout, g);
+g = NULL;
+
+for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
+  if (authi->version_report)
+    g = (*authi->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
 
   /* 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


@@ -1151,31 +1272,41 @@ show_db_version(fp);
 #endif
 #define QUOTE(X) #X
 #define EXPAND_AND_QUOTE(X) QUOTE(X)
 #endif
 #define QUOTE(X) #X
 #define EXPAND_AND_QUOTE(X) QUOTE(X)

-  fprintf(fp, "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
 
 #undef QUOTE
 #undef EXPAND_AND_QUOTE
 

-  init_lookup_list();
-  for (int i = 0; i < lookup_list_count; i++)
-    if (lookup_list[i]->version_report)
-      lookup_list[i]->version_report(fp);
+show_string(is_stdout, g);
+g = NULL;
+
+init_lookup_list();
+for (int i = 0; i < lookup_list_count; i++)
+  if (lookup_list[i]->version_report)
+    g = lookup_list[i]->version_report(g);
+show_string(is_stdout, g);
+g = NULL;

 
 #ifdef WHITELIST_D_MACROS
 
 #ifdef WHITELIST_D_MACROS

-  fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
+  g = string_fmt_append(g, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);

 #else
 #else

-  fprintf(fp, "WHITELIST_D_MACROS unset\n");
+  g = string_cat(g, US"WHITELIST_D_MACROS unset\n");

 #endif
 #ifdef TRUSTED_CONFIG_LIST
 #endif
 #ifdef TRUSTED_CONFIG_LIST

-  fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
+  g = string_fmt_append(g, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);

 #else
 #else

-  fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
+  g = string_cat(g, US"TRUSTED_CONFIG_LIST unset\n");

 #endif
 #endif

+  }

 
 

-} while (0);
+show_string(is_stdout, g);

 store_reset(reset_point);
 }
 
 store_reset(reset_point);
 }
 


@@ -1327,56 +1458,58 @@ static uschar *
 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
 {
 gstring * g = NULL;
 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
 {
 gstring * g = NULL;

+BOOL had_input = FALSE;

 
 if (!fn_readline) { printf("> "); fflush(stdout); }
 
 for (int i = 0;; i++)
   {
   uschar buffer[1024];
 
 if (!fn_readline) { printf("> "); fflush(stdout); }
 
 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)
     {
     if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
   char *readline_line = NULL;
   if (fn_readline)
     {
     if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;

-    if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
+    if (*readline_line && fn_addhist) fn_addhist(readline_line);

     p = US readline_line;
     }
   else
     p = US readline_line;
     }
   else

-  #endif
+#endif

 
   /* readline() not in use */
 
     {
 
   /* 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 */
 
     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)
 
   if (i > 0)

-    while (p < ss && isspace(*p)) p++;   /* leading space after cont */
+    while (p < ss && isspace(*p)) p++;   /* strip leading space after cont */

 
   g = string_catn(g, p, ss - p);
 
 
   g = string_catn(g, p, ss - p);
 

-  #ifdef USE_READLINE
+#ifdef USE_READLINE

   if (fn_readline) free(readline_line);
   if (fn_readline) free(readline_line);

-  #endif
+#endif

 
   /* g can only be NULL if ss==p */
 
   /* g can only be NULL if ss==p */

-  if (ss == p || g->s[g->ptr-1] != '\\')
+  if (ss == p || gstring_last_char(g) != '\\') /* not continuation; done */

     break;
 
     break;
 

-  --g->ptr;
-  (void) string_from_gstring(g);
+  gstring_trim(g, 1);                          /* drop the \ */

   }
 
   }
 

-if (!g) printf("\n");
-return string_from_gstring(g);
+if (had_input) return g ? string_from_gstring(g) : US"";
+printf("\n");
+return NULL;

 }
 
 
 }
 
 


@@ -1508,14 +1641,8 @@ for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
     continue;
   if ((len = m->replen) == 0)
     continue;
     continue;
   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;
     return FALSE;

-    }

   }
 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
 return TRUE;
   }
 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
 return TRUE;


@@ -1534,10 +1661,11 @@ Arguments:
 */
 
 static void
 */
 
 static void

-expansion_test_line(uschar * line)
+expansion_test_line(const uschar * line)

 {
 int len;
 BOOL dummy_macexp;
 {
 int len;
 BOOL dummy_macexp;

+uschar * s;

 
 Ustrncpy(big_buffer, line, big_buffer_size);
 big_buffer[big_buffer_size-1] = '\0';
 
 Ustrncpy(big_buffer, line, big_buffer_size);
 big_buffer[big_buffer_size-1] = '\0';


@@ -1550,13 +1678,43 @@ if (isupper(big_buffer[0]))
   if (macro_read_assignment(big_buffer))
     printf("Defined macro '%s'\n", mlast->name);
   }
   if (macro_read_assignment(big_buffer))
     printf("Defined macro '%s'\n", mlast->name);
   }

+else if (Ustrncmp(big_buffer, "set ", 4) == 0)
+  printf("%s\n", acl_standalone_setvar(big_buffer+4));

 else
 else

-  if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
+  if ((s = expand_string(big_buffer))) printf("%s\n", CS s);

   else printf("Failed: %s\n", expand_string_message);
 }
 
 
 
   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       *
 *************************************************/
 /*************************************************
 *          Entry point and high-level code       *
 *************************************************/


@@ -1590,7 +1748,7 @@ int  i, rv;
 int  list_queue_option = 0;
 int  msg_action = 0;
 int  msg_action_arg = -1;
 int  list_queue_option = 0;
 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;
 int  queue_only_reason = 0;
 #ifdef EXIM_PERL
 int  perl_start_option = 0;


@@ -1615,7 +1773,6 @@ BOOL list_queue = FALSE;
 BOOL list_options = FALSE;
 BOOL list_config = FALSE;
 BOOL local_queue_only;
 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 one_msg_action = FALSE;
 BOOL opt_D_used = FALSE;
 BOOL queue_only_set = FALSE;


@@ -1635,10 +1792,10 @@ uschar *cmdline_syslog_name = NULL;
 uschar *start_queue_run_id = NULL;
 uschar *stop_queue_run_id = NULL;
 uschar *expansion_test_message = 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;
+const uschar *ftest_domain = NULL;
+const uschar *ftest_localpart = NULL;
+const uschar *ftest_prefix = NULL;
+const uschar *ftest_suffix = NULL;

 uschar *log_oneline = NULL;
 uschar *malware_test_file = NULL;
 uschar *real_sender_address;
 uschar *log_oneline = NULL;
 uschar *malware_test_file = NULL;
 uschar *real_sender_address;


@@ -1669,6 +1826,9 @@ extern char **environ;
 (void)gettimeofday(&timestamp_startup, NULL);
 #endif
 
 (void)gettimeofday(&timestamp_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. */
 /* 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. */


@@ -1731,6 +1891,10 @@ f.running_in_test_harness =
 if (f.running_in_test_harness)
   debug_store = TRUE;
 
 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
 follow this. A "strange" locale can affect the formatting of timestamps, so we
 /* 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
 follow this. A "strange" locale can affect the formatting of timestamps, so we


@@ -1765,15 +1929,6 @@ indirection, because some systems don't allow writing to the variable "stderr".
 
 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = 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. */
 
 /* 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. */
 


@@ -1782,12 +1937,21 @@ big_buffer = store_malloc(big_buffer_size);
 /* Set up the handler for the data request signal, and set the initial
 descriptive text. */
 
 /* Set up the handler for the data request signal, and set the initial
 descriptive text. */
 

-process_info = store_get(PROCESS_INFO_SIZE, TRUE);     /* tainted */
+process_info = store_get(PROCESS_INFO_SIZE, GET_TAINTED);

 set_process_info("initializing");
 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 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
 if (getpid() == 1) signal(SIGTERM, term_handler);
 
 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate


@@ -1855,7 +2019,7 @@ this here, because the -M options check their arguments for syntactic validity
 using mac_ismsgid, which uses this. */
 
 regex_ismsgid =
 using mac_ismsgid, which uses this. */
 
 regex_ismsgid =

-  regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
+  regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", 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
 
 /* 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


@@ -1863,18 +2027,16 @@ terminating whitespace character is included. */
 
 regex_smtp_code =
   regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
 
 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 =
 
 #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
 
 #endif
 

-for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
-

 /* 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. */
 /* 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. */


@@ -1917,7 +2079,7 @@ this is a smail convention. */
 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
     (namelen  > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
   {
 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";
   }
   receiving_message = FALSE;
   called_as = US"-runq";
   }


@@ -1976,7 +2138,7 @@ on the second character (the one after '-'), to save some effort. */
   BOOL badarg = FALSE;
   uschar * arg = argv[i];
   uschar * argrest;
   BOOL badarg = FALSE;
   uschar * arg = argv[i];
   uschar * argrest;

-  int switchchar;
+  uschar switchchar;

 
   /* An argument not starting with '-' is the start of a recipients list;
   break out of the options-scanning loop. */
 
   /* An argument not starting with '-' is the start of a recipients list;
   break out of the options-scanning loop. */


@@ -2088,7 +2250,7 @@ on the second character (the one after '-'), to save some effort. */
           -bdf: Ditto, but in the foreground.
        */
        case 'd':
           -bdf: Ditto, but in the foreground.
        */
        case 'd':

-         f.daemon_listen = TRUE;
+         f.daemon_listen = f.daemon_scion = TRUE;

          if (*argrest == 'f') f.background_daemon = FALSE;
          else if (*argrest) badarg = TRUE;
          break;
          if (*argrest == 'f') f.background_daemon = FALSE;
          else if (*argrest) badarg = TRUE;
          break;


@@ -2132,10 +2294,10 @@ on the second character (the one after '-'), to save some effort. */
            {
            if (++i >= argc)
              exim_fail("exim: string expected after %s\n", arg);
            {
            if (++i >= argc)
              exim_fail("exim: string expected after %s\n", arg);

-           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];
+           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;
            else badarg = TRUE;
            }
          break;


@@ -2145,7 +2307,9 @@ on the second character (the one after '-'), to save some effort. */
          if (!*argrest || Ustrcmp(argrest, "c") == 0)
            {
            if (++i >= argc) { badarg = TRUE; break; }
          if (!*argrest || Ustrcmp(argrest, "c") == 0)
            {
            if (++i >= argc) { badarg = TRUE; break; }

-           sender_host_address = string_copy_taint(argv[i], TRUE);
+           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;
            host_checking = checking = f.log_testing_mode = TRUE;
            f.host_checking_callout = *argrest == 'c';
            message_logs = FALSE;


@@ -2255,7 +2419,7 @@ on the second character (the one after '-'), to save some effort. */
        case 'P':
 
          /* -bP config: we need to setup here, because later,
        case 'P':
 
          /* -bP config: we need to setup here, because later,

-          * when list_options is checked, the config is read already */
+         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)
          if (*argrest)
            badarg = TRUE;
          else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)


@@ -2336,7 +2500,7 @@ on the second character (the one after '-'), to save some effort. */
              version_cnumber, version_date);
            printf("%s\n", CS version_copyright);
            version_printed = TRUE;
              version_cnumber, version_date);
            printf("%s\n", CS version_copyright);
            version_printed = TRUE;

-           show_whats_supported(stdout);
+           show_whats_supported(TRUE);

            f.log_testing_mode = TRUE;
            }
          else badarg = TRUE;
            f.log_testing_mode = TRUE;
            }
          else badarg = TRUE;


@@ -2346,7 +2510,7 @@ on the second character (the one after '-'), to save some effort. */
        case 'w':
          f.inetd_wait_mode = TRUE;
          f.background_daemon = FALSE;
        case 'w':
          f.inetd_wait_mode = TRUE;
          f.background_daemon = FALSE;

-         f.daemon_listen = TRUE;
+         f.daemon_listen = f.daemon_scion = TRUE;

          if (*argrest)
            if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
              exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
          if (*argrest)
            if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
              exim_fail("exim: bad time value %s: abandoned\n", argv[i]);


@@ -2373,6 +2537,7 @@ on the second character (the one after '-'), to save some effort. */
       int len = Ustrlen(ALT_CONFIG_PREFIX);
       const uschar *list = argrest;
       uschar *filename;
       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
       while((filename = string_nextinlist(&list, &sep, big_buffer,
              big_buffer_size)))
         if (  (  Ustrlen(filename) < len


@@ -2530,21 +2695,36 @@ on the second character (the one after '-'), to save some effort. */
     #endif
     break;
 
     #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':
     case 'd':

+
+    /* -dropcr: Set this option.  Now a no-op, retained for compatibility only. */
+

     if (Ustrcmp(argrest, "ropcr") == 0)
       {
       /* drop_cr = TRUE; */
       }
 
     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
       {
 
     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;
       unsigned int selector = D_default;
       debug_selector = 0;
       debug_file = NULL;


@@ -2602,7 +2782,9 @@ on the second character (the one after '-'), to save some effort. */
     case 'F':
     if (!*argrest)
       if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
     case 'F':
     if (!*argrest)
       if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }

-    originator_name = string_copy_taint(argrest, TRUE);
+    originator_name = string_copy_taint(
+                 exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"),
+                 GET_TAINTED);

     f.sender_name_forced = TRUE;
     break;
 
     f.sender_name_forced = TRUE;
     break;
 


@@ -2628,8 +2810,9 @@ on the second character (the one after '-'), to save some effort. */
       uschar *errmess;
       if (!*argrest)
         if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
       uschar *errmess;
       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)
       if (!*argrest)

-        *(sender_address = store_get(1, FALSE)) = '\0';  /* Ensure writeable memory */
+        *(sender_address = store_get(1, GET_UNTAINTED)) = '\0';  /* Ensure writeable memory */

       else
         {
         uschar * temp = argrest + Ustrlen(argrest) - 1;
       else
         {
         uschar * temp = argrest + Ustrlen(argrest) - 1;


@@ -2644,7 +2827,7 @@ on the second character (the one after '-'), to save some effort. */
                  &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
           exim_fail("exim: bad -f address \"%s\": %s\n", 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, TRUE);
+       sender_address = string_copy_taint(sender_address, GET_TAINTED);

 #ifdef SUPPORT_I18N
        message_smtputf8 =  string_is_utf8(sender_address);
        allow_utf8_domains = FALSE;
 #ifdef SUPPORT_I18N
        message_smtputf8 =  string_is_utf8(sender_address);
        allow_utf8_domains = FALSE;


@@ -2694,7 +2877,7 @@ on the second character (the one after '-'), to save some effort. */
       exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
     if (sz < 1)
       exim_fail("exim: the -L syslog name is too short\n");
       exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
     if (sz < 1)
       exim_fail("exim: the -L syslog name is too short\n");

-    cmdline_syslog_name = string_copy_taint(argrest, TRUE);
+    cmdline_syslog_name = string_copy_taint(argrest, GET_TAINTED);

     break;
 
     case 'M':
     break;
 
     case 'M':


@@ -2724,9 +2907,15 @@ on the second character (the one after '-'), to save some effort. */
       if (msg_action_arg >= 0)
         exim_fail("exim: incompatible arguments\n");
 
       if (msg_action_arg >= 0)
         exim_fail("exim: incompatible arguments\n");
 

-      continue_transport = string_copy_taint(argv[++i], TRUE);
-      continue_hostname = string_copy_taint(argv[++i], TRUE);
-      continue_host_address = string_copy_taint(argv[++i], TRUE);
+      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;
       continue_sequence = Uatoi(argv[++i]);
       msg_action = MSG_DELIVER;
       msg_action_arg = ++i;


@@ -2771,13 +2960,19 @@ on the second character (the one after '-'), to save some effort. */
     /* -MCd: for debug, set a process-purpose string */
 
        case 'd': if (++i < argc)
     /* -MCd: for debug, set a process-purpose string */
 
        case 'd': if (++i < argc)

-                   process_purpose = string_copy_taint(argv[i], TRUE);
+                   process_purpose = string_copy_taint(
+                     exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"),
+                     GET_TAINTED);

                  else badarg = TRUE;
                  break;
 
                  else badarg = TRUE;
                  break;
 

-    /* -MCG: set the queue name, to a non-default value */
+    /* -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(argv[i], TRUE);
+       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;
 
                  else badarg = TRUE;
                  break;
 


@@ -2785,11 +2980,42 @@ on the second character (the one after '-'), to save some effort. */
 
        case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
 
 
        case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
 

+#ifdef EXPERIMENTAL_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) */
 
        case 'P': smtp_peer_options |= OPTION_PIPE; break;
 
     /* -MCP: set the smtp_use_pipelining flag; this is useful only when
     it preceded -MC (see above) */
 
        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) */
     /* -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) */


@@ -2813,19 +3039,37 @@ on the second character (the one after '-'), to save some effort. */
        case 'S': smtp_peer_options |= OPTION_SIZE; break;
 
 #ifndef DISABLE_TLS
        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,
     /* -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.  */
+    and the TLS cipher. */

 
        case 't': if (++i < argc)
 
        case 't': if (++i < argc)

-                   sending_ip_address = string_copy_taint(argv[i], TRUE);
+                   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)
                  else badarg = TRUE;
                  if (++i < argc)
                    sending_port = (int)(Uatol(argv[i]));
                  else badarg = TRUE;
                  if (++i < argc)

-                   continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
+                   continue_proxy_cipher = string_copy_taint(
+                     exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"),
+                     GET_TAINTED);

                  else badarg = TRUE;
                  /*FALLTHROUGH*/
 
                  else badarg = TRUE;
                  /*FALLTHROUGH*/
 


@@ -2852,6 +3096,7 @@ on the second character (the one after '-'), to save some effort. */
     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)
     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
        -Mmad mark all recipients delivered
        -Mmd  mark recipients(s) delivered
        -Mes  edit sender


@@ -2887,12 +3132,11 @@ on the second character (the one after '-'), to save some effort. */
    else if (Ustrcmp(argrest, "G") == 0)
       {
       msg_action = MSG_SETQUEUE;
    else if (Ustrcmp(argrest, "G") == 0)
       {
       msg_action = MSG_SETQUEUE;

-      queue_name_dest = string_copy_taint(argv[++i], TRUE);
-      }
-    else if (Ustrcmp(argrest, "mad") == 0)
-      {
-      msg_action = MSG_MARK_ALL_DELIVERED;
+      queue_name_dest = string_copy_taint(
+       exim_str_fail_toolong(argv[++i], 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;
     else if (Ustrcmp(argrest, "md") == 0)
       {
       msg_action = MSG_MARK_DELIVERED;


@@ -3100,27 +3344,37 @@ on the second character (the one after '-'), to save some effort. */
        /* -oMa: Set sender host address */
 
        if (Ustrcmp(argrest, "a") == 0)
        /* -oMa: Set sender host address */
 
        if (Ustrcmp(argrest, "a") == 0)

-         sender_host_address = string_copy_taint(argv[++i], TRUE);
+         sender_host_address = string_copy_taint(
+           exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"),
+           GET_TAINTED);

 
        /* -oMaa: Set authenticator name */
 
        else if (Ustrcmp(argrest, "aa") == 0)
 
        /* -oMaa: Set authenticator name */
 
        else if (Ustrcmp(argrest, "aa") == 0)

-         sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
+         sender_host_authenticated = string_copy_taint(
+           exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"),
+           GET_TAINTED);

 
        /* -oMas: setting authenticated sender */
 
        else if (Ustrcmp(argrest, "as") == 0)
 
        /* -oMas: setting authenticated sender */
 
        else if (Ustrcmp(argrest, "as") == 0)

-         authenticated_sender = string_copy_taint(argv[++i], TRUE);
+         authenticated_sender = string_copy_taint(
+           exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"),
+           GET_TAINTED);

 
        /* -oMai: setting authenticated id */
 
        else if (Ustrcmp(argrest, "ai") == 0)
 
        /* -oMai: setting authenticated id */
 
        else if (Ustrcmp(argrest, "ai") == 0)

-         authenticated_id = string_copy_taint(argv[++i], TRUE);
+         authenticated_id = string_copy_taint(
+           exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMai"),
+           GET_TAINTED);

 
        /* -oMi: Set incoming interface address */
 
        else if (Ustrcmp(argrest, "i") == 0)
 
        /* -oMi: Set incoming interface address */
 
        else if (Ustrcmp(argrest, "i") == 0)

-         interface_address = string_copy_taint(argv[++i], TRUE);
+         interface_address = string_copy_taint(
+           exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"),
+           GET_TAINTED);

 
        /* -oMm: Message reference */
 
 
        /* -oMm: Message reference */
 


@@ -3140,19 +3394,25 @@ on the second character (the one after '-'), to save some effort. */
          if (received_protocol)
            exim_fail("received_protocol is set already\n");
          else
          if (received_protocol)
            exim_fail("received_protocol is set already\n");
          else

-           received_protocol = string_copy_taint(argv[++i], TRUE);
+           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)
 
        /* -oMs: Set sender host name */
 
        else if (Ustrcmp(argrest, "s") == 0)

-         sender_host_name = string_copy_taint(argv[++i], TRUE);
+         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)
          {
          sender_ident_set = TRUE;
 
        /* -oMt: Set sender ident */
 
        else if (Ustrcmp(argrest, "t") == 0)
          {
          sender_ident_set = TRUE;

-         sender_ident = string_copy_taint(argv[++i], TRUE);
+         sender_ident = string_copy_taint(
+           exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"),
+           GET_TAINTED);

          }
 
        /* Else a bad argument */
          }
 
        /* Else a bad argument */


@@ -3177,6 +3437,10 @@ on the second character (the one after '-'), to save some effort. */
         -oPX:       delete pid file of daemon */
 
       case 'P':
         -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) override_pid_file_path = argv[++i];
        else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
        else badarg = TRUE;
        if (!*argrest) override_pid_file_path = argv[++i];
        else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
        else badarg = TRUE;


@@ -3202,17 +3466,20 @@ on the second character (the one after '-'), to save some effort. */
        break;
 
       /* -oX <list>: Override local_interfaces and/or default daemon ports */
        break;
 
       /* -oX <list>: 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) badarg = TRUE;
 
       case 'X':
        if (*argrest) badarg = TRUE;

-       else override_local_interfaces = string_copy_taint(argv[++i], 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;
        break;
 
       /* -oY: Override creation of daemon notifier socket */
 
       case 'Y':
        if (*argrest) badarg = TRUE;

-       else notifier_socket = NULL;
+       else f.notifier_socket_en = FALSE;

        break;
 
       /* Unknown -o argument */
        break;
 
       /* Unknown -o argument */


@@ -3253,164 +3520,168 @@ on the second character (the one after '-'), to save some effort. */
         exim_fail("received_protocol is set already\n");
 
       if (!hn)
         exim_fail("received_protocol is set already\n");
 
       if (!hn)

-        received_protocol = string_copy_taint(argrest, TRUE);
+        received_protocol = string_copy_taint(
+         exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"),
+         GET_TAINTED);

       else
         {
       else
         {

-        received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
-        sender_host_name = string_copy_taint(hn + 1, TRUE);
+        (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
+        received_protocol = string_copyn_taint(argrest, hn - argrest, GET_TAINTED);
+        sender_host_name = string_copy_taint(hn + 1, GET_TAINTED);

         }
       }
     break;
 
         }
       }
     break;
 

+    /* -q:  set up queue runs */

 
     case 'q':
 
     case 'q':

-    receiving_message = FALSE;
-    if (queue_interval >= 0)
-      exim_fail("exim: -q specified more than once\n");
-
-    /* -qq...: Do queue runs in a 2-stage manner */
-
-    if (*argrest == 'q')

       {
       {

-      f.queue_2stage = TRUE;
-      argrest++;
-      }
+      BOOL two_stage, first_del, force, thaw = FALSE, local;

 
 

-    /* -qi...: Do only first (initial) deliveries */
+      receiving_message = FALSE;

 
 

-    if (*argrest == 'i')
-      {
-      f.queue_run_first_delivery = TRUE;
-      argrest++;
-      }
+      /* -qq...: Do queue runs in a 2-stage manner */

 
 

-    /* -qf...: Run the queue, forcing deliveries
-       -qff..: Ditto, forcing thawing as well */
+      if ((two_stage = *argrest == 'q'))
+       argrest++;

 
 

-    if (*argrest == 'f')
-      {
-      f.queue_run_force = TRUE;
-      if (*++argrest == 'f')
-        {
-        f.deliver_force_thaw = TRUE;
-        argrest++;
-        }
-      }
+      /* -qi...: Do only first (initial) deliveries */

 
 

-    /* -q[f][f]l...: Run the queue only on local deliveries */
+      if ((first_del = *argrest == 'i'))
+       argrest++;

 
 

-    if (*argrest == 'l')
-      {
-      f.queue_run_local = TRUE;
-      argrest++;
-      }
+      /* -qf...: Run the queue, forcing deliveries
+        -qff..: Ditto, forcing thawing as well */

 
 

-    /* -q[f][f][l][G<name>]... Work on the named queue */
+      if ((force = *argrest == 'f'))
+       if ((thaw = *++argrest == 'f'))
+         argrest++;

 
 

-    if (*argrest == 'G')
-      {
-      int i;
-      for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
-      queue_name = string_copyn(argrest, i);
-      argrest += i;
-      if (*argrest == '/') argrest++;
-      }
+      /* -q[f][f]l...: Run the queue only on local deliveries */

 
 

-    /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
-    only, optionally named, optionally starting from a given message id. */
+      if ((local = *argrest == 'l'))
+       argrest++;

 
 

-    if (!(list_queue || count_queue))
-      if (  !*argrest
-        && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
+      /* -q[f][f][l][G<name>]... Work on the named queue */
+
+      if (*argrest == 'G')

        {
        {

-       queue_interval = 0;
-       if (i+1 < argc && mac_ismsgid(argv[i+1]))
-         start_queue_run_id = string_copy_taint(argv[++i], TRUE);
-       if (i+1 < argc && mac_ismsgid(argv[i+1]))
-         stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
+       int i;
+       for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
+       exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
+       queue_name = string_copyn(argrest, i);
+       argrest += i;
+       if (*argrest == '/') argrest++;

        }
 
        }
 

-    /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
-    forced, optionally local only, optionally named. */
-
-      else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
-                                                 0, FALSE)) <= 0)
-       exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
-    break;
+      /* -q[f][f][l][G<name>]: 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<name>/]<n>: 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 = readconf_readtime(*argrest ? argrest : argv[++i], 0, FALSE);
+         if (intvl <= 0)
+           exim_fail("exim: bad time value %s: abandoned\n", argv[i]);

 
 

-    if (*argrest)
-      for (int i = 0; i < nelem(rsopts); i++)
-        if (Ustrcmp(argrest, rsopts[i]) == 0)
-          {
-          if (i != 2) f.queue_run_force = TRUE;
-          if (i >= 2) f.deliver_selectstring_regex = TRUE;
-          if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
-          argrest += Ustrlen(rsopts[i]);
-          }
+         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");

 
 

-    /* -R: Set string to match in addresses for forced queue run to
-    pick out particular messages. */
+         q = alloc_qrunner();
+         q->interval = intvl;
+         }

 
 

-    if (*argrest)
-      deliver_selectstring = string_copy_taint(argrest, TRUE);
-    else if (i+1 < argc)
-      deliver_selectstring = string_copy_taint(argv[++i], TRUE);
-    else
-      exim_fail("exim: string expected after -R\n");
-    break;
+       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;
+      }

 
 

-    /* -r: an obsolete synonym for -f (see above) */

 
 

+    case 'R':   /* Synonymous with -qR... */
+    case 'S':   /* Synonymous with -qS... */
+      {
+      const uschar * tainted_selectstr;
+      uschar * s;

 
 

-    /* -S: Like -R but works on sender. */
+      receiving_message = FALSE;

 
 

-    case 'S':   /* Synonymous with -qS... */
-    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

 
 

-    /* -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
+       -S...: Like -R but works on sender.

 
     in all cases provided there are no further characters in this
     argument. */
 
 
     in all cases provided there are no further characters in this
     argument. */
 

-    if (*argrest)
-      for (int i = 0; i < nelem(rsopts); i++)
-        if (Ustrcmp(argrest, rsopts[i]) == 0)
-          {
-          if (i != 2) f.queue_run_force = TRUE;
-          if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
-          if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
-          argrest += Ustrlen(rsopts[i]);
-          }
+      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. */
 
     pick out particular messages. */
 

-    if (*argrest)
-      deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
-    else if (i+1 < argc)
-      deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
-    else
-      exim_fail("exim: string expected after -S\n");
+      /* 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;
+      }

     break;
 
     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
     /* -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


@@ -3418,7 +3689,7 @@ on the second character (the one after '-'), to save some effort. */
 
     case 'T':
     if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
 
     case 'T':
     if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)

-      fudged_queue_times = string_copy_taint(argv[++i], TRUE);
+      fudged_queue_times = string_copy_taint(argv[++i], GET_TAINTED);

     else badarg = TRUE;
     break;
 
     else badarg = TRUE;
     break;
 


@@ -3490,10 +3761,14 @@ on the second character (the one after '-'), to save some effort. */
         exim_fail("exim: string expected after -X\n");
     break;
 
         exim_fail("exim: string expected after -X\n");
     break;
 

+    /* -z: a line of text to log */
+

     case 'z':
     if (!*argrest)
       if (++i < argc)
     case 'z':
     if (!*argrest)
       if (++i < argc)

-       log_oneline = string_copy_taint(argv[i], TRUE);
+       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;
       else
         exim_fail("exim: file name expected after %s\n", argv[i-1]);
     break;


@@ -3515,9 +3790,8 @@ on the second character (the one after '-'), to save some effort. */
 
 /* If -R or -S have been specified without -q, assume a single queue run. */
 
 
 /* If -R or -S have been specified without -q, assume a single queue run. */
 

- if (  (deliver_selectstring || deliver_selectstring_sender)
-    && queue_interval < 0)
-  queue_interval = 0;
+ if ((deliver_selectstring || deliver_selectstring_sender) && !qrunners)
+  alloc_onetime_qrunner();

 
 
 END_ARG:
 
 
 END_ARG:


@@ -3529,22 +3803,22 @@ if (usage_wanted) exim_usage(called_as);
 
 /* Arguments have been processed. Check for incompatibilities. */
 if (  (  (smtp_input || extract_recipients || recipients_arg < argc)
 
 /* Arguments have been processed. Check for incompatibilities. */
 if (  (  (smtp_input || extract_recipients || recipients_arg < argc)

-      && (  f.daemon_listen || queue_interval >= 0 || bi_option
+      && (  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
         || 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 || queue_interval > 0 || list_options
+      && (  f.daemon_listen || is_multiple_qrun() || list_options

         || checking && msg_action != MSG_LOAD
         || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
       )  )
         || checking && msg_action != MSG_LOAD
         || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
       )  )

-   || (  (f.daemon_listen || queue_interval > 0)
+   || (  (f.daemon_listen || is_multiple_qrun())

       && (  sender_address || list_options || list_queue || checking
         || bi_option
       )  )
       && (  sender_address || list_options || list_queue || checking
         || bi_option
       )  )

-   || f.daemon_listen && queue_interval == 0
-   || f.inetd_wait_mode && queue_interval >= 0
+   || f.daemon_listen && is_onetime_qrun()
+   || f.inetd_wait_mode && qrunners

    || (  list_options
       && (  checking || smtp_input || extract_recipients
         || filter_test != FTEST_NONE || bi_option
    || (  list_options
       && (  checking || smtp_input || extract_recipients
         || filter_test != FTEST_NONE || bi_option


@@ -3560,7 +3834,7 @@ if (  (  (smtp_input || extract_recipients || recipients_arg < argc)
    || (  smtp_input
       && (sender_address || filter_test != FTEST_NONE || extract_recipients)
       )
    || (  smtp_input
       && (sender_address || filter_test != FTEST_NONE || extract_recipients)
       )

-   || deliver_selectstring && queue_interval < 0
+   || deliver_selectstring && !qrunners

    || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
    )
   exim_fail("exim: incompatible command-line options or arguments\n");
    || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
    )
   exim_fail("exim: incompatible command-line options or arguments\n");


@@ -3581,7 +3855,7 @@ if (debug_selector != 0)
       version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
       debug_selector);
     if (!version_printed)
       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);

     }
   }
 
     }
   }
 


@@ -3599,7 +3873,7 @@ else
   {
   struct rlimit rlp;
 
   {
   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",
   if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
     {
     log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",


@@ -3622,9 +3896,9 @@ else
           strerror(errno));
       }
     }
           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",
   if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
     {
     log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",


@@ -3632,20 +3906,20 @@ else
     rlp.rlim_cur = rlp.rlim_max = 0;
     }
 
     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;
   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;
   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));
     }
     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
   }
 
 /* Exim is normally entered as root (but some special configurations are


@@ -3768,6 +4042,7 @@ is equivalent to the ability to modify a setuid binary!
 This needs to happen before we read the main configuration. */
 init_lookup_list();
 
 This needs to happen before we read the main configuration. */
 init_lookup_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
 #ifdef SUPPORT_I18N
 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
 #endif


@@ -3783,6 +4058,11 @@ 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);
 /* 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        -
 
 /* checking:
     -be[m] expansion test        -


@@ -3801,19 +4081,21 @@ issues (currently about tls_advertise_hosts and keep_environment not being
 defined) */
 
   {
 defined) */
 
   {

+  int old_pool = store_pool;

 #ifdef MEASURE_TIMING
 #ifdef MEASURE_TIMING

-  struct timeval t0, diff;
+  struct timeval t0;

   (void)gettimeofday(&t0, NULL);
 #endif
 
   (void)gettimeofday(&t0, NULL);
 #endif
 

+  store_pool = POOL_CONFIG;

   readconf_main(checking || list_options);
   readconf_main(checking || list_options);

+  store_pool = old_pool;

 
 #ifdef MEASURE_TIMING
   report_time_since(&t0, US"readconf_main (delta)");
 #endif
   }
 
 
 #ifdef MEASURE_TIMING
   report_time_since(&t0, US"readconf_main (delta)");
 #endif
   }
 

-

 /* Now in directory "/" */
 
 if (cleanup_environment() == FALSE)
 /* Now in directory "/" */
 
 if (cleanup_environment() == FALSE)


@@ -4070,11 +4352,9 @@ if (  (debug_selector & D_any  ||  LOGGING(arguments))
     p += 13;
   else
     {
     p += 13;
   else
     {

-    Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
-    p += 4 + Ustrlen(initial_cwd);
-    /* in case p is near the end and we don't provide enough space for
-     * string_format to be willing to write. */
-    *p = '\0';
+    p += 4;
+    snprintf(CS p, big_buffer_size - (p - big_buffer), "%s", CCS initial_cwd);
+    p += Ustrlen(CCS p);

     }
 
   (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
     }
 
   (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);


@@ -4135,7 +4415,7 @@ if (bi_option)
     {
     int i = 0;
     uschar *argv[3];
     {
     int i = 0;
     uschar *argv[3];

-    argv[i++] = bi_command;
+    argv[i++] = bi_command;    /* nonexpanded option so assume untainted */

     if (alias_arg) argv[i++] = alias_arg;
     argv[i++] = NULL;
 
     if (alias_arg) argv[i++] = alias_arg;
     argv[i++] = NULL;
 


@@ -4176,7 +4456,7 @@ if (!f.admin_user)
   if (  deliver_give_up || f.daemon_listen || malware_test_file
      || count_queue && queue_list_requires_admin
      || list_queue && queue_list_requires_admin
   if (  deliver_give_up || f.daemon_listen || malware_test_file
      || count_queue && queue_list_requires_admin
      || list_queue && queue_list_requires_admin

-     || queue_interval >= 0 && prod_requires_admin
+     || qrunners && prod_requires_admin

      || queue_name_dest && prod_requires_admin
      || debugset && !f.running_in_test_harness
      )
      || queue_name_dest && prod_requires_admin
      || debugset && !f.running_in_test_harness
      )


@@ -4192,7 +4472,7 @@ regression testing. */
 if (  real_uid != root_uid && real_uid != exim_uid
    && (  continue_hostname
       || (  f.dont_deliver
 if (  real_uid != root_uid && real_uid != exim_uid
    && (  continue_hostname
       || (  f.dont_deliver

-        && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
+        && (qrunners || f.daemon_listen || msg_action_arg > 0)

       )  )
    && !f.running_in_test_harness
    )
       )  )
    && !f.running_in_test_harness
    )


@@ -4309,11 +4589,11 @@ to the state Exim usually runs in. */
 if (  !unprivileged                            /* originally had root AND */
    && !removed_privilege                       /* still got root AND      */
    && !f.daemon_listen                         /* not starting the daemon */
 if (  !unprivileged                            /* originally had root AND */
    && !removed_privilege                       /* still got root AND      */
    && !f.daemon_listen                         /* not starting the daemon */

-   && queue_interval <= 0                      /* (either kind of daemon) */
+   && (!qrunners || is_onetime_qrun())         /* (either kind of daemon) */

    && (                                                /*    AND EITHER           */
          deliver_drop_privilege                        /* requested unprivileged  */
       || (                                     /*       OR                */
    && (                                                /*    AND EITHER           */
          deliver_drop_privilege                        /* requested unprivileged  */
       || (                                     /*       OR                */

-            queue_interval < 0                 /* not running the queue   */
+            !qrunners                          /* not running the queue   */

          && (  msg_action_arg < 0              /*       and               */
             || msg_action != MSG_DELIVER       /* not delivering          */
            )                                   /*       and               */
          && (  msg_action_arg < 0              /*       and               */
             || msg_action != MSG_DELIVER       /* not delivering          */
            )                                   /*       and               */


@@ -4402,7 +4682,13 @@ if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
   event_action gets expanded */
 
   if (msg_action == MSG_REMOVE)
   event_action gets expanded */
 
   if (msg_action == MSG_REMOVE)

+    {
+    int old_pool = store_pool;
+    store_pool = POOL_CONFIG;

     readconf_rest();
     readconf_rest();

+    store_pool = old_pool;
+    store_writeprotect(POOL_CONFIG);
+    }

 
   if (!one_msg_action)
     {
 
   if (!one_msg_action)
     {


@@ -4422,17 +4708,26 @@ if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
   }
 
 /* We used to set up here to skip reading the ACL section, on
   }
 
 /* We used to set up here to skip reading the ACL section, on

- (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
+ (msg_action_arg > 0 || (is_onetime_qrun() && !f.daemon_listen)

 Now, since the intro of the ${acl } expansion, ACL definitions may be
 needed in transports so we lost the optimisation. */
 
   {
 Now, since the intro of the ${acl } expansion, ACL definitions may be
 needed in transports so we lost the optimisation. */
 
   {

+  int old_pool = store_pool;

 #ifdef MEASURE_TIMING
 #ifdef MEASURE_TIMING

-  struct timeval t0, diff;
+  struct timeval t0;

   (void)gettimeofday(&t0, NULL);
 #endif
 
   (void)gettimeofday(&t0, NULL);
 #endif
 

+  store_pool = POOL_CONFIG;

   readconf_rest();
   readconf_rest();

+  store_pool = old_pool;
+
+  /* -be can add macro definitions, needing to link to the macro structure
+  chain.  Otherwise, make the memory used for config data readonly. */
+
+  if (!expansion_test)
+    store_writeprotect(POOL_CONFIG);

 
 #ifdef MEASURE_TIMING
   report_time_since(&t0, US"readconf_rest (delta)");
 
 #ifdef MEASURE_TIMING
   report_time_since(&t0, US"readconf_rest (delta)");


@@ -4461,14 +4756,14 @@ if (test_retry_arg >= 0)
   retry_config *yield;
   int basic_errno = 0;
   int more_errno = 0;
   retry_config *yield;
   int basic_errno = 0;
   int more_errno = 0;

-  uschar *s1, *s2;
+  const uschar *s1, *s2;

 
   if (test_retry_arg >= argc)
     {
     printf("-brt needs a domain or address argument\n");
     exim_exit(EXIT_FAILURE);
     }
 
   if (test_retry_arg >= argc)
     {
     printf("-brt needs a domain or address argument\n");
     exim_exit(EXIT_FAILURE);
     }

-  s1 = argv[test_retry_arg++];
+  s1 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_EMAILADDR_MAX, "-brt");

   s2 = NULL;
 
   /* If the first argument contains no @ and no . it might be a local user
   s2 = NULL;
 
   /* If the first argument contains no @ and no . it might be a local user


@@ -4484,13 +4779,13 @@ if (test_retry_arg >= 0)
   /* There may be an optional second domain arg. */
 
   if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
   /* There may be an optional second domain arg. */
 
   if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)

-    s2 = argv[test_retry_arg++];
+    s2 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_DOMAINNAME_MAX, "-brt 2nd");

 
   /* The final arg is an error name */
 
   if (test_retry_arg < argc)
     {
 
   /* The final arg is an error name */
 
   if (test_retry_arg < argc)
     {

-    uschar *ss = argv[test_retry_arg];
+    const uschar *ss = exim_str_fail_toolong(argv[test_retry_arg], EXIM_DRIVERNAME_MAX, "-brt 3rd");

     uschar *error =
       readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
     if (error != NULL)
     uschar *error =
       readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
     if (error != NULL)


@@ -4592,11 +4887,11 @@ if (list_options)
         Ustrcmp(argv[i], "macro") == 0 ||
         Ustrcmp(argv[i], "environment") == 0))
       {
         Ustrcmp(argv[i], "macro") == 0 ||
         Ustrcmp(argv[i], "environment") == 0))
       {

-      fail |= !readconf_print(argv[i+1], argv[i], flag_n);
+      fail |= !readconf_print(exim_str_fail_toolong(argv[i+1], EXIM_DRIVERNAME_MAX, "-bP name"), argv[i], flag_n);

       i++;
       }
     else
       i++;
       }
     else

-      fail = !readconf_print(argv[i], NULL, flag_n);
+      fail = !readconf_print(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-bP item"), NULL, flag_n);

     }
   exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
   }
     }
   exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
   }


@@ -4641,6 +4936,7 @@ if (msg_action_arg > 0 && msg_action != MSG_LOAD)
     pid_t pid;
     /*XXX This use of argv[i] for msg_id should really be tainted, but doing
     that runs into a later copy into the untainted global message_id[] */
     pid_t pid;
     /*XXX This use of argv[i] for msg_id should really be tainted, but doing
     that runs into a later copy into the untainted global message_id[] */

+    /*XXX Do we need a length limit check here? */

     if (i == argc - 1)
       (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
     else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
     if (i == argc - 1)
       (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
     else if ((pid = exim_fork(US"cmdline-delivery")) == 0)


@@ -4663,18 +4959,9 @@ if (msg_action_arg > 0 && msg_action != MSG_LOAD)
 /* If only a single queue run is requested, without SMTP listening, we can just
 turn into a queue runner, with an optional starting message id. */
 
 /* If only a single queue run is requested, without SMTP listening, we can just
 turn into a queue runner, with an optional starting message id. */
 

-if (queue_interval == 0 && !f.daemon_listen)
+if (is_onetime_qrun() && !f.daemon_listen)

   {
   {

-  DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
-    start_queue_run_id ? US" starting at " : US"",
-    start_queue_run_id ? start_queue_run_id: US"",
-    stop_queue_run_id ?  US" stopping at " : US"",
-    stop_queue_run_id ?  stop_queue_run_id : US"");
-  if (*queue_name)
-    set_process_info("running the '%s' queue (single queue run)", queue_name);
-  else
-    set_process_info("running the queue (single queue run)");
-  queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
+  single_queue_run(qrunners, start_queue_run_id, stop_queue_run_id);

   exim_exit(EXIT_SUCCESS);
   }
 
   exim_exit(EXIT_SUCCESS);
   }
 


@@ -4724,8 +5011,8 @@ for (i = 0;;)
 
         if (gecos_pattern && gecos_name)
           {
 
         if (gecos_pattern && gecos_name)
           {

-          const pcre *re;
-          re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
+          const pcre2_code *re;
+          re = regex_must_compile(gecos_pattern, MCS_NOFLAGS, TRUE); /* Use malloc */

 
           if (regex_match_and_setup(re, name, 0, -1))
             {
 
           if (regex_match_and_setup(re, name, 0, -1))
             {


@@ -4799,7 +5086,7 @@ returns. We leave this till here so that the originator_ fields are available
 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
 mode. */
 
 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
 mode. */
 

-if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
+if (f.daemon_listen || f.inetd_wait_mode || is_multiple_qrun())

   {
   if (mua_wrapper)
     {
   {
   if (mua_wrapper)
     {


@@ -4813,7 +5100,7 @@ if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
   routines in it, so call even if tls_require_ciphers is unset */
     {
 # ifdef MEASURE_TIMING
   routines in it, so call even if tls_require_ciphers is unset */
     {
 # ifdef MEASURE_TIMING

-    struct timeval t0, diff;
+    struct timeval t0;

     (void)gettimeofday(&t0, NULL);
 # endif
     if (!tls_dropprivs_validate_require_cipher(FALSE))
     (void)gettimeofday(&t0, NULL);
 # endif
     if (!tls_dropprivs_validate_require_cipher(FALSE))


@@ -4846,7 +5133,7 @@ if (test_rewrite_arg >= 0)
     printf("-brw needs an address argument\n");
     exim_exit(EXIT_FAILURE);
     }
     printf("-brw needs an address argument\n");
     exim_exit(EXIT_FAILURE);
     }

-  rewrite_test(argv[test_rewrite_arg]);
+  rewrite_test(exim_str_fail_toolong(argv[test_rewrite_arg], EXIM_EMAILADDR_MAX, "-brw"));

   exim_exit(EXIT_SUCCESS);
   }
 
   exim_exit(EXIT_SUCCESS);
   }
 


@@ -4939,7 +5226,9 @@ if (verify_address_mode || f.address_test_mode)
     while (recipients_arg < argc)
       {
       /* Supplied addresses are tainted since they come from a user */
     while (recipients_arg < argc)
       {
       /* Supplied addresses are tainted since they come from a user */

-      uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
+      uschar * s = string_copy_taint(
+       exim_str_fail_toolong(argv[recipients_arg++], EXIM_DISPLAYMAIL_MAX, "address verification"),
+       GET_TAINTED);

       while (*s)
         {
         BOOL finished = FALSE;
       while (*s)
         {
         BOOL finished = FALSE;


@@ -4956,7 +5245,10 @@ if (verify_address_mode || f.address_test_mode)
     {
     uschar * s = get_stdinput(NULL, NULL);
     if (!s) break;
     {
     uschar * s = get_stdinput(NULL, NULL);
     if (!s) break;

-    test_address(string_copy_taint(s, TRUE), flags, &exit_value);
+    test_address(string_copy_taint(
+       exim_str_fail_toolong(s, EXIM_DISPLAYMAIL_MAX, "address verification (stdin)"),
+       GET_TAINTED),
+      flags, &exit_value);

     }
 
   route_tidyup();
     }
 
   route_tidyup();


@@ -4973,11 +5265,15 @@ if (expansion_test)
   dns_init(FALSE, FALSE, FALSE);
   if (msg_action_arg > 0 && msg_action == MSG_LOAD)
     {
   dns_init(FALSE, FALSE, FALSE);
   if (msg_action_arg > 0 && msg_action == MSG_LOAD)
     {

-    uschar spoolname[256];  /* Not big_buffer; used in spool_read_header() */
+    uschar * spoolname;

     if (!f.admin_user)
       exim_fail("exim: permission denied\n");
     if (!f.admin_user)
       exim_fail("exim: permission denied\n");

-    message_id = argv[msg_action_arg];
-    (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
+    message_id = US exim_str_fail_toolong(argv[msg_action_arg], MESSAGE_ID_LENGTH, "message-id");
+    /* Checking the length of the ID is sufficient to validate it.
+    Get an untainted version so file opens can be done. */
+    message_id = string_copy_taint(message_id, GET_UNTAINTED);
+
+    spoolname = string_sprintf("%s-H", message_id);

     if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
       printf ("Failed to load message datafile %s\n", message_id);
     if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
     if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
       printf ("Failed to load message datafile %s\n", message_id);
     if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)


@@ -5016,7 +5312,7 @@ if (expansion_test)
 
   if (recipients_arg < argc)
     while (recipients_arg < argc)
 
   if (recipients_arg < argc)
     while (recipients_arg < argc)

-      expansion_test_line(argv[recipients_arg++]);
+      expansion_test_line(exim_str_fail_toolong(argv[recipients_arg++], EXIM_EMAILADDR_MAX, "recipient"));

 
   /* Read stdin */
 
 
   /* Read stdin */
 


@@ -5092,7 +5388,7 @@ if (host_checking)
   it. The code works for both IPv4 and IPv6, as it happens. */
 
   size = host_aton(sender_host_address, x);
   it. The code works for both IPv4 and IPv6, as it happens. */
 
   size = host_aton(sender_host_address, x);

-  sender_host_address = store_get(48, FALSE);  /* large enough for full IPv6 */
+  sender_host_address = store_get(48, GET_UNTAINTED);  /* large enough for full IPv6 */

   (void)host_nmtoa(size, x, -1, sender_host_address, ':');
 
   /* Now set up for testing */
   (void)host_nmtoa(size, x, -1, sender_host_address, ':');
 
   /* Now set up for testing */


@@ -5112,7 +5408,10 @@ if (host_checking)
 
   memset(sender_host_cache, 0, sizeof(sender_host_cache));
   if (verify_check_host(&hosts_connection_nolog) == OK)
 
   memset(sender_host_cache, 0, sizeof(sender_host_cache));
   if (verify_check_host(&hosts_connection_nolog) == OK)

+    {

     BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
     BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);

+    BIT_CLEAR(log_selector, log_selector_size, Li_smtp_no_mail);
+    }

   log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
 
   /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
   log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
 
   /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,


@@ -5260,7 +5559,7 @@ if (smtp_input)
   {
   if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
     smtp_batched_input? "batched " : "",
   {
   if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
     smtp_batched_input? "batched " : "",

-    (sender_address!= NULL)? sender_address : originator_login);
+    sender_address ? sender_address : originator_login);

   }
 else
   {
   }
 else
   {


@@ -5301,7 +5600,10 @@ if (smtp_input)
   smtp_out = stdout;
   memset(sender_host_cache, 0, sizeof(sender_host_cache));
   if (verify_check_host(&hosts_connection_nolog) == OK)
   smtp_out = stdout;
   memset(sender_host_cache, 0, sizeof(sender_host_cache));
   if (verify_check_host(&hosts_connection_nolog) == OK)

+    {

     BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
     BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);

+    BIT_CLEAR(log_selector, log_selector_size, Li_smtp_no_mail);
+    }

   log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
   if (!smtp_start_session())
     {
   log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
   if (!smtp_start_session())
     {


@@ -5310,7 +5612,8 @@ if (smtp_input)
     }
   }
 
     }
   }
 

-/* Otherwise, set up the input size limit here. */
+/* Otherwise, set up the input size limit here and set no stdin stdio buffer
+(we handle buferring so as to have visibility of fill level). */

 
 else
   {
 
 else
   {


@@ -5322,6 +5625,8 @@ else
     else
       log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
         "message_size_limit: %s", expand_string_message);
     else
       log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
         "message_size_limit: %s", expand_string_message);

+
+  setvbuf(stdin, NULL, _IONBF, 0);

   }
 
 /* Loop for several messages when reading SMTP input. If we fork any child
   }
 
 /* Loop for several messages when reading SMTP input. If we fork any child


@@ -5354,15 +5659,15 @@ that SIG_IGN works. */
 
 if (!f.synchronous_delivery)
   {
 
 if (!f.synchronous_delivery)
   {

-  #ifdef SA_NOCLDWAIT
+#ifdef SA_NOCLDWAIT

   struct sigaction act;
   act.sa_handler = SIG_IGN;
   sigemptyset(&(act.sa_mask));
   act.sa_flags = SA_NOCLDWAIT;
   sigaction(SIGCHLD, &act, NULL);
   struct sigaction act;
   act.sa_handler = SIG_IGN;
   sigemptyset(&(act.sa_mask));
   act.sa_flags = SA_NOCLDWAIT;
   sigaction(SIGCHLD, &act, NULL);

-  #else
+#else

   signal(SIGCHLD, SIG_IGN);
   signal(SIGCHLD, SIG_IGN);

-  #endif
+#endif

   }
 
 /* Save the current store pool point, for resetting at the start of
   }
 
 /* Save the current store pool point, for resetting at the start of


@@ -5374,7 +5679,7 @@ real_sender_address = sender_address;
 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
 collapsed). */
 
 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
 collapsed). */
 

-while (more)
+for (BOOL more = TRUE; more; )

   {
   rmark reset_point = store_mark();
   message_id[0] = 0;
   {
   rmark reset_point = store_mark();
   message_id[0] = 0;


@@ -5416,10 +5721,10 @@ while (more)
       /* Now get the data for the message */
 
       more = receive_msg(extract_recipients);
       /* Now get the data for the message */
 
       more = receive_msg(extract_recipients);

-      if (message_id[0] == 0)
+      if (!message_id[0])

         {
        cancel_cutthrough_connection(TRUE, US"receive dropped");
         {
        cancel_cutthrough_connection(TRUE, US"receive dropped");

-        if (more) goto moreloop;
+        if (more) goto MORELOOP;

         smtp_log_no_mail();               /* Log no mail if configured */
         exim_exit(EXIT_FAILURE);
         }
         smtp_log_no_mail();               /* Log no mail if configured */
         exim_exit(EXIT_FAILURE);
         }


@@ -5459,11 +5764,15 @@ while (more)
       {
       int start, end, domain;
       uschar * errmess;
       {
       int start, end, domain;
       uschar * errmess;

-      uschar * s = string_copy_taint(list[i], TRUE);
+      /* There can be multiple addresses, so EXIM_DISPLAYMAIL_MAX (tuned for 1) is too short.
+       * We'll still want to cap it to something, just in case. */
+      uschar * s = string_copy_taint(
+       exim_str_fail_toolong(list[i], BIG_BUFFER_SIZE, "address argument"),
+       GET_TAINTED);

 
       /* Loop for each comma-separated address */
 
 
       /* Loop for each comma-separated address */
 

-      while (*s != 0)
+      while (*s)

         {
         BOOL finished = FALSE;
         uschar *recipient;
         {
         BOOL finished = FALSE;
         uschar *recipient;


@@ -5494,11 +5803,12 @@ while (more)
           parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
 
 #ifdef SUPPORT_I18N
           parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
 
 #ifdef SUPPORT_I18N

-       if (string_is_utf8(recipient))
-         message_smtputf8 = TRUE;
-       else
-         allow_utf8_domains = b;
+        if (recipient)
+          if (string_is_utf8(recipient)) message_smtputf8 = TRUE;
+          else allow_utf8_domains = b;

        }
        }

+#else
+        ;

 #endif
         if (domain == 0 && !f.allow_unqualified_recipient)
           {
 #endif
         if (domain == 0 && !f.allow_unqualified_recipient)
           {


@@ -5524,7 +5834,7 @@ while (more)
                 errors_sender_rc : EXIT_FAILURE;
             }
 
                 errors_sender_rc : EXIT_FAILURE;
             }
 

-        receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
+        receive_add_recipient(string_copy_taint(recipient, GET_TAINTED), -1);

         s = ss;
         if (!finished)
           while (*(++s) != 0 && (*s == ',' || isspace(*s)));
         s = ss;
         if (!finished)
           while (*(++s) != 0 && (*s == ',' || isspace(*s)));


@@ -5563,13 +5873,8 @@ while (more)
     the file copy. */
 
     if (!receive_timeout)
     the file copy. */
 
     if (!receive_timeout)

-      {
-      struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 };    /* 30 minutes */
-      fd_set r;
-
-      FD_ZERO(&r); FD_SET(0, &r);
-      if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
-      }
+      if (poll_one_fd(0, POLLIN, 30*60*1000) == 0)     /* 30 minutes */
+       mainlog_close();

 
     /* Read the data for the message. If filter_test is not FTEST_NONE, this
     will just read the headers for the message, and not write anything onto the
 
     /* Read the data for the message. If filter_test is not FTEST_NONE, this
     will just read the headers for the message, and not write anything onto the


@@ -5582,7 +5887,7 @@ while (more)
     for real; when reading the headers of a message for filter testing,
     it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
 
     for real; when reading the headers of a message for filter testing,
     it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
 

-    if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
+    if (!message_id[0]) exim_exit(EXIT_FAILURE);

     }  /* Non-SMTP message reception */
 
   /* If this is a filter testing run, there are headers in store, but
     }  /* Non-SMTP message reception */
 
   /* If this is a filter testing run, there are headers in store, but


@@ -5596,10 +5901,10 @@ while (more)
     {
     deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
     deliver_domain_orig = deliver_domain;
     {
     deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
     deliver_domain_orig = deliver_domain;

-    deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
+    deliver_localpart = ftest_localpart ? US ftest_localpart : originator_login;

     deliver_localpart_orig = deliver_localpart;
     deliver_localpart_orig = deliver_localpart;

-    deliver_localpart_prefix = ftest_prefix;
-    deliver_localpart_suffix = ftest_suffix;
+    deliver_localpart_prefix = US ftest_prefix;
+    deliver_localpart_suffix = US ftest_suffix;

     deliver_home = originator_home;
 
     if (!return_path)
     deliver_home = originator_home;
 
     if (!return_path)


@@ -5775,11 +6080,11 @@ while (more)
   finished subprocesses here, in case there are lots of messages coming in
   from the same source. */
 
   finished subprocesses here, in case there are lots of messages coming in
   from the same source. */
 

-  #ifndef SIG_IGN_WORKS
+#ifndef SIG_IGN_WORKS

   while (waitpid(-1, NULL, WNOHANG) > 0);
   while (waitpid(-1, NULL, WNOHANG) > 0);

-  #endif
+#endif

 
 

-moreloop:
+MORELOOP:

   return_path = sender_address = NULL;
   authenticated_sender = NULL;
   deliver_localpart_orig = NULL;
   return_path = sender_address = NULL;
   authenticated_sender = NULL;
   deliver_localpart_orig = NULL;


@@ -5788,13 +6093,13 @@ moreloop:
   dnslist_domain = dnslist_matched = NULL;
 #ifdef WITH_CONTENT_SCAN
   malware_name = NULL;
   dnslist_domain = dnslist_matched = NULL;
 #ifdef WITH_CONTENT_SCAN
   malware_name = NULL;

+  regex_vars_clear();

 #endif
   callout_address = NULL;
   sending_ip_address = NULL;
   deliver_localpart_data = deliver_domain_data =
   recipient_data = sender_data = NULL;
   acl_var_m = NULL;
 #endif
   callout_address = NULL;
   sending_ip_address = NULL;
   deliver_localpart_data = deliver_domain_data =
   recipient_data = sender_data = NULL;
   acl_var_m = NULL;

-  for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;

 
   store_reset(reset_point);
   }
 
   store_reset(reset_point);
   }