X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/3978c243a079d5ed6201a2743a36ea0c966ca4e0..b8514d1960e259d49ab2c84c89eba52ab993da3f:/src/src/daemon.c

diff --git a/src/src/daemon.c b/src/src/daemon.c
index 12e3413a0..1816537ec 100644
--- a/src/src/daemon.c
+++ b/src/src/daemon.c
@@ -3,6 +3,7 @@
 *************************************************/
 
 /* Copyright (c) University of Cambridge 1995 - 2018 */
+/* Copyright (c) The Exim Maintainers 2020 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* Functions concerned with running Exim as a daemon */
@@ -126,6 +127,18 @@ if (smtp_out) smtp_printf("421 %s\r\n", FALSE, smtp_msg);
 
 
 
+/*************************************************
+*************************************************/
+
+static void
+close_daemon_sockets(int daemon_notifier_fd,
+  int * listen_sockets, int listen_socket_count)
+{
+if (daemon_notifier_fd >= 0) (void) close(daemon_notifier_fd);
+for (int i = 0; i < listen_socket_count; i++) (void) close(listen_sockets[i]);
+}
+
+
 /*************************************************
 *            Handle a connected SMTP call        *
 *************************************************/
@@ -355,13 +368,12 @@ if (LOGGING(smtp_connection))
 expansion above did a lookup. */
 
 search_tidyup();
-pid = fork();
+pid = exim_fork(US"daemon-accept");
 
 /* Handle the child process */
 
 if (pid == 0)
   {
-  int i;
   int queue_only_reason = 0;
   int old_pool = store_pool;
   int save_debug_selector = debug_selector;
@@ -424,7 +436,7 @@ if (pid == 0)
   extensive comment before the reception loop in exim.c for a fuller
   explanation of this logic. */
 
-  for (i = 0; i < listen_socket_count; i++) (void)close(listen_sockets[i]);
+  close_daemon_sockets(daemon_notifier_fd, listen_sockets, listen_socket_count);
 
   /* Set FD_CLOEXEC on the SMTP socket. We don't want any rogue child processes
   to be able to communicate with them, under any circumstances. */
@@ -651,7 +663,7 @@ if (pid == 0)
 
       mac_smtp_fflush();
 
-      if ((dpid = fork()) == 0)
+      if ((dpid = exim_fork(US"daemon-accept-delivery")) == 0)
         {
         (void)fclose(smtp_in);
         (void)fclose(smtp_out);
@@ -942,7 +954,7 @@ else
   DEBUG(D_any)
     debug_printf("%s\n", string_open_failed(errno, "pid file %s",
       pid_file_path));
-exim_exit(EXIT_SUCCESS, US"pid file remover");
+exim_exit(EXIT_SUCCESS);
 }
 
 
@@ -960,7 +972,7 @@ if (daemon_notifier_fd >= 0)
   daemon_notifier_fd = -1;
 #ifndef EXIM_HAVE_ABSTRACT_UNIX_SOCKETS
     {
-    uschar * s = string_sprintf("%s/%s", spool_directory, NOTIFIER_SOCKET_NAME);
+    uschar * s = expand_string(notifier_socket);
     DEBUG(D_any) debug_printf("unlinking notifier socket %s\n", s);
     Uunlink(s);
     }
@@ -969,7 +981,7 @@ if (daemon_notifier_fd >= 0)
 
 if (f.running_in_test_harness || write_pid)
   {
-  if ((pid = fork()) == 0)
+  if ((pid = exim_fork(US"daemon-del-pidfile")) == 0)
     {
     if (override_pid_file_path)
       (void)child_exec_exim(CEE_EXEC_PANIC, FALSE, NULL, FALSE, 3,
@@ -982,7 +994,7 @@ if (f.running_in_test_harness || write_pid)
   if (pid > 0)
     child_close(pid, 1);
   }
-exim_exit(EXIT_SUCCESS, US"daemon");
+exim_exit(EXIT_SUCCESS);
 }
 
 
@@ -998,51 +1010,61 @@ const uschar * where;
 struct sockaddr_un sa_un = {.sun_family = AF_UNIX};
 int len;
 
-DEBUG(D_any) debug_printf("creating notifier socket ");
+if (override_local_interfaces && !override_pid_file_path)
+  {
+  DEBUG(D_any)
+    debug_printf("-oX used without -oP so not creating notifier socket\n");
+  return;
+  }
+
+DEBUG(D_any) debug_printf("creating notifier socket\n");
 
-where = US"socket";
 #ifdef SOCK_CLOEXEC
 if ((fd = socket(PF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0)
-  goto bad;
+  { where = US"socket"; goto bad; }
 #else
-if ((fd = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0)
-  goto bad;
+if ((fd = socket(PF_UNIX, SOCK_DGRAM, 0)) < 0)
+  { where = US"socket"; goto bad; }
 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
 #endif
 
 #ifdef EXIM_HAVE_ABSTRACT_UNIX_SOCKETS
 sa_un.sun_path[0] = 0;	/* Abstract local socket addr - Linux-specific? */
 len = offsetof(struct sockaddr_un, sun_path) + 1
-  + snprintf(sa_un.sun_path+1, sizeof(sa_un.sun_path)-1, "%s", NOTIFIER_SOCKET_NAME);
-DEBUG(D_any) debug_printf("@%s\n", sa_un.sun_path+1);
+  + snprintf(sa_un.sun_path+1, sizeof(sa_un.sun_path)-1, "%s",
+	      expand_string(notifier_socket));
+DEBUG(D_any) debug_printf(" @%s\n", sa_un.sun_path+1);
 #else			/* filesystem-visible and persistent; will neeed removal */
 len = offsetof(struct sockaddr_un, sun_path)
-  + snprintf(sa_un.sun_path, sizeof(sa_un.sun_path), "%s/%s", 
-		spool_directory, NOTIFIER_SOCKET_NAME);
-DEBUG(D_any) debug_printf("%s\n", sa_un.sun_path);
+  + snprintf(sa_un.sun_path, sizeof(sa_un.sun_path), "%s", 
+	      expand_string(notifier_socket));
+DEBUG(D_any) debug_printf(" %s\n", sa_un.sun_path);
 #endif
 
-where = US"bind";
 if (bind(fd, (const struct sockaddr *)&sa_un, len) < 0)
-  goto bad;
+  { where = US"bind"; goto bad; }
 
 #ifdef SO_PASSCRED		/* Linux */
-where = US"SO_PASSCRED";
 if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)) < 0)
-  goto bad;
+  { where = US"SO_PASSCRED"; goto bad2; }
 #elif defined(LOCAL_CREDS)	/* FreeBSD-ish */
-where = US"LOCAL_CREDS";
-if (setsockopt(fd, SOL_SOCKET, LOCAL_CREDS, &on, sizeof(on)) < 0)
-  goto bad;
+if (setsockopt(fd, 0, LOCAL_CREDS, &on, sizeof(on)) < 0)
+  { where = US"LOCAL_CREDS"; goto bad2; }
 #endif
 
 /* debug_printf("%s: fd %d\n", __FUNCTION__, fd); */
 daemon_notifier_fd = fd;
 return;
 
+bad2:
+#ifndef EXIM_HAVE_ABSTRACT_UNIX_SOCKETS
+  Uunlink(sa_un.sun_path);
+#endif
 bad:
-  log_write(0, LOG_MAIN|LOG_PANIC, "%s: %s: %s",
+  log_write(0, LOG_MAIN|LOG_PANIC, "%s %s: %s",
     __FUNCTION__, where, strerror(errno));
+  close(fd);
+  return;
 }
 
 
@@ -1063,7 +1085,6 @@ struct msghdr msg = { .msg_name = &sa_un,
 		      .msg_controllen = sizeof(cbuf)
 		    };
 ssize_t sz;
-struct cmsghdr * cp;
 
 buf[sizeof(buf)-1] = 0;
 if ((sz = recvmsg(daemon_notifier_fd, &msg, 0)) <= 0) return FALSE;
@@ -1117,14 +1138,14 @@ for (struct cmsghdr * cp = CMSG_FIRSTHDR(&msg);
 buf[sz] = 0;
 switch (buf[0])
   {
-#ifdef EXPERIMENTAL_QUEUE_RAMP
+#ifndef DISABLE_QUEUE_RAMP
   case NOTIFY_MSG_QRUN:
     /* this should be a message_id */
     DEBUG(D_queue_run)
       debug_printf("%s: qrunner trigger: %s\n", __FUNCTION__, buf+1);
     memcpy(queuerun_msgid, buf+1, MESSAGE_ID_LENGTH+1);
     return TRUE;
-#endif	/*EXPERIMENTAL_QUEUE_RAMP*/
+#endif
 
   case NOTIFY_QUEUE_SIZE_REQ:
     {
@@ -1178,6 +1199,8 @@ ip_address_item *addresses = NULL;
 time_t last_connection_time = (time_t)0;
 int local_queue_run_max = atoi(CS expand_string(queue_run_max));
 
+process_purpose = US"daemon";
+
 /* If any debugging options are set, turn on the D_pid bit so that all
 debugging lines get the pid added. */
 
@@ -1329,7 +1352,7 @@ if (f.daemon_listen && !f.inetd_wait_mode)
 
     list = override_local_interfaces;
     sep = 0;
-    while ((s = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
+    while ((s = string_nextinlist(&list, &sep, NULL, 0)))
       {
       uschar joinstr[4];
       gstring ** gp = Ustrpbrk(s, ".:") ? &new_local_interfaces : &new_smtp_port;
@@ -1367,13 +1390,13 @@ if (f.daemon_listen && !f.inetd_wait_mode)
 
   list = daemon_smtp_port;
   sep = 0;
-  while ((s = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
+  while ((s = string_nextinlist(&list, &sep, NULL, 0)))
     pct++;
   default_smtp_port = store_get((pct+1) * sizeof(int), FALSE);
   list = daemon_smtp_port;
   sep = 0;
   for (pct = 0;
-       (s = string_nextinlist(&list, &sep, big_buffer, big_buffer_size));
+       (s = string_nextinlist(&list, &sep, NULL, 0));
        pct++)
     {
     if (isdigit(*s))
@@ -1579,7 +1602,7 @@ if (f.background_daemon)
 
   if (getppid() != 1)
     {
-    pid_t pid = fork();
+    pid_t pid = exim_fork(US"daemon");
     if (pid < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
       "fork() failed when starting daemon: %s", strerror(errno));
     if (pid > 0) exit(EXIT_SUCCESS);      /* in parent process, just exit */
@@ -1877,7 +1900,8 @@ else if (f.daemon_listen)
   ip_address_item * ipa;
   uschar * p;
   uschar * qinfo = queue_interval > 0
-    ? string_sprintf("-q%s", readconf_printtime(queue_interval))
+    ? string_sprintf("-q%s%s",
+	f.queue_2stage ? "q" : "", readconf_printtime(queue_interval))
     : US"no queue runs";
 
   /* Build a list of listening addresses in big_buffer, but limit it to 10
@@ -2096,7 +2120,7 @@ for (;;)
     else
       {
       DEBUG(D_any) debug_printf("%s received\n",
-#ifdef EXPERIMENTAL_QUEUE_RAMP
+#ifndef DISABLE_QUEUE_RAMP
 	*queuerun_msgid ? "qrun notification" :
 #endif
 	"SIGALRM");
@@ -2105,14 +2129,11 @@ for (;;)
       have enough queue runners on the go. If we are not running as root, a
       re-exec is required. */
 
-      if (queue_interval > 0 &&
-         (local_queue_run_max <= 0 || queue_run_count < local_queue_run_max))
+      if (  queue_interval > 0
+         && (local_queue_run_max <= 0 || queue_run_count < local_queue_run_max))
         {
-        if ((pid = fork()) == 0)
+        if ((pid = exim_fork(US"queue-runner")) == 0)
           {
-          DEBUG(D_any) debug_printf("Starting queue-runner: pid %d\n",
-            (int)getpid());
-
           /* Disable debugging if it's required only for the daemon process. We
           leave the above message, because it ties up with the "child ended"
           debugging messages. */
@@ -2121,10 +2142,8 @@ for (;;)
 
           /* Close any open listening sockets in the child */
 
-	  if (daemon_notifier_fd >= 0)
-	    (void) close(daemon_notifier_fd);
-          for (int sk = 0; sk < listen_socket_count; sk++)
-            (void) close(listen_sockets[sk]);
+	  close_daemon_sockets(daemon_notifier_fd,
+	    listen_sockets, listen_socket_count);
 
           /* Reset SIGHUP and SIGCHLD in the child in both cases. */
 
@@ -2146,7 +2165,7 @@ for (;;)
             *p++ = '-';
             *p++ = 'q';
             if (  f.queue_2stage
-#ifdef EXPERIMENTAL_QUEUE_RAMP
+#ifndef DISABLE_QUEUE_RAMP
 	       && !*queuerun_msgid
 #endif
 	       ) *p++ = 'q';
@@ -2158,9 +2177,10 @@ for (;;)
 	    extra[0] = *queue_name
 	      ? string_sprintf("%sG%s", opt, queue_name) : opt;
 
-#ifdef EXPERIMENTAL_QUEUE_RAMP
+#ifndef DISABLE_QUEUE_RAMP
 	    if (*queuerun_msgid)
 	      {
+	      log_write(0, LOG_MAIN, "notify triggered queue run");
 	      extra[extracount++] = queuerun_msgid;	/* Trigger only the */
 	      extra[extracount++] = queuerun_msgid;	/* one message      */
 	      }
@@ -2192,9 +2212,10 @@ for (;;)
 
           /* No need to re-exec; SIGALRM remains set to the default handler */
 
-#ifdef EXPERIMENTAL_QUEUE_RAMP
+#ifndef DISABLE_QUEUE_RAMP
 	  if (*queuerun_msgid)
 	    {
+	    log_write(0, LOG_MAIN, "notify triggered queue run");
 	    f.queue_2stage = FALSE;
 	    queue_run(queuerun_msgid, queuerun_msgid, FALSE);
 	    }
@@ -2227,7 +2248,7 @@ for (;;)
       /* Reset the alarm clock */
 
       sigalrm_seen = FALSE;
-#ifdef EXPERIMENTAL_QUEUE_RAMP
+#ifndef DISABLE_QUEUE_RAMP
       if (*queuerun_msgid)
 	*queuerun_msgid = 0;
       else
@@ -2432,8 +2453,8 @@ for (;;)
     {
     log_write(0, LOG_MAIN, "pid %d: SIGHUP received: re-exec daemon",
       getpid());
-    for (int sk = 0; sk < listen_socket_count; sk++)
-      (void)close(listen_sockets[sk]);
+    close_daemon_sockets(daemon_notifier_fd,
+      listen_sockets, listen_socket_count);
     ALARM_CLR(0);
     signal(SIGHUP, SIG_IGN);
     sighup_argv[0] = exim_path;