*************************************************/
/* 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 */
+/*************************************************
+*************************************************/
+
+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 *
*************************************************/
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;
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. */
mac_smtp_fflush();
- if ((dpid = fork()) == 0)
+ if ((dpid = exim_fork(US"daemon-accept-delivery")) == 0)
{
(void)fclose(smtp_in);
(void)fclose(smtp_out);
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);
}
{
int pid;
+if (daemon_notifier_fd >= 0)
+ {
+ close(daemon_notifier_fd);
+ daemon_notifier_fd = -1;
+#ifndef EXIM_HAVE_ABSTRACT_UNIX_SOCKETS
+ {
+ uschar * s = expand_string(notifier_socket);
+ DEBUG(D_any) debug_printf("unlinking notifier socket %s\n", s);
+ Uunlink(s);
+ }
+#endif
+ }
+
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,
if (pid > 0)
child_close(pid, 1);
}
-exim_exit(EXIT_SUCCESS, US"daemon");
+exim_exit(EXIT_SUCCESS);
}
{
int fd;
const uschar * where;
-struct sockaddr_un sun = {.sun_family = AF_UNIX};
+struct sockaddr_un sa_un = {.sun_family = AF_UNIX};
int len;
+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(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0)
- goto bad;
+if ((fd = socket(PF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0)
+ { 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
-sun.sun_path[0] = 0; /* Abstract local socket addr - Linux-specific? */
+#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(sun.sun_path+1, sizeof(sun.sun_path)-1, "%s", NOTIFIER_SOCKET_NAME);
+ + 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",
+ 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 *)&sun, len) < 0)
- goto bad;
+if (bind(fd, (const struct sockaddr *)&sa_un, len) < 0)
+ { where = US"bind"; goto bad; }
-where = US"SO_PASSCRED";
+#ifdef SO_PASSCRED /* Linux */
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 */
+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;
}
daemon_notification(void)
{
uschar buf[256], cbuf[256];
-struct sockaddr_un sun;
+struct sockaddr_un sa_un;
struct iovec iov = {.iov_base = buf, .iov_len = sizeof(buf)-1};
-struct msghdr msg = { .msg_name = &sun,
- .msg_namelen = sizeof(sun),
+struct msghdr msg = { .msg_name = &sa_un,
+ .msg_namelen = sizeof(sa_un),
.msg_iov = &iov,
.msg_iovlen = 1,
.msg_control = cbuf,
.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;
#ifdef notdef
debug_printf("addrlen %d\n", msg.msg_namelen);
#endif
-DEBUG(D_queue_run) debug_printf("%s from addr%s '%s'\n", __FUNCTION__,
- *sun.sun_path ? "" : " abstract", sun.sun_path+ (*sun.sun_path ? 0 : 1));
+DEBUG(D_queue_run) debug_printf("%s from addr '%s%.*s'\n", __FUNCTION__,
+ *sa_un.sun_path ? "" : "@",
+ (int)msg.msg_namelen - (*sa_un.sun_path ? 0 : 1),
+ sa_un.sun_path + (*sa_un.sun_path ? 0 : 1));
/* Refuse to handle the item unless the peer has good credentials */
#ifdef SCM_CREDENTIALS
# define EXIM_SCM_CR_TYPE SCM_CREDENTIALS
-#elif defined(SCM_CREDS)
+#elif defined(LOCAL_CREDS) && defined(SCM_CREDS)
# define EXIM_SCM_CR_TYPE SCM_CREDS
#else
-# error no SCM creds knowlege
+ /* The OS has no way to get the creds of the caller (for a unix/datagram socket.
+ Punt; don't try to check. */
#endif
+#ifdef EXIM_SCM_CR_TYPE
for (struct cmsghdr * cp = CMSG_FIRSTHDR(&msg);
cp;
cp = CMSG_NXTHDR(&msg, cp))
if (cp->cmsg_level == SOL_SOCKET && cp->cmsg_type == EXIM_SCM_CR_TYPE)
{
-#ifdef SCM_CREDENTIALS
+# ifdef SCM_CREDENTIALS /* Linux */
struct ucred * cr = (struct ucred *) CMSG_DATA(cp);
if (cr->uid && cr->uid != exim_uid)
{
DEBUG(D_queue_run) debug_printf("%s: sender creds pid %d uid %d gid %d\n",
__FUNCTION__, (int)cr->pid, (int)cr->uid, (int)cr->gid);
return FALSE;
-#elif defined(SCM_CREDS)
- struct cmsgcred * cr = (struct cmsgcred *) CMSG_DATA(cp);
- if (cr->cmcred_uid && cr->cmcred_uid != exim_uid)
+ }
+# elif defined(LOCAL_CREDS) /* BSD-ish */
+ struct sockcred * cr = (struct sockcred *) CMSG_DATA(cp);
+ if (cr->sc_uid && cr->sc_uid != exim_uid)
{
- DEBUG(D_queue_run) debug_printf("%s: sender creds pid %d uid %d gid %d\n",
- __FUNCTION__, (int)cr->cmcred_pid, (int)cr->cmcred_uid, (int)cr->cmcred_gid);
+ DEBUG(D_queue_run) debug_printf("%s: sender creds pid ??? uid %d gid %d\n",
+ __FUNCTION__, (int)cr->sc_uid, (int)cr->sc_gid);
return FALSE;
-#endif
}
+# endif
break;
}
+#endif
buf[sz] = 0;
switch (buf[0])
debug_printf("%s: queue size request: %s\n", __FUNCTION__, buf);
if (sendto(daemon_notifier_fd, buf, len, 0,
- (const struct sockaddr *)&sun, msg.msg_namelen) < 0)
+ (const struct sockaddr *)&sa_un, msg.msg_namelen) < 0)
log_write(0, LOG_MAIN|LOG_PANIC,
"%s: sendto: %s\n", __FUNCTION__, strerror(errno));
return FALSE;
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. */
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;
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))
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 */
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
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. */
/* 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. */
#ifdef EXPERIMENTAL_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 */
}
#ifdef EXPERIMENTAL_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);
}
{
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;
projects / exim.git / blobdiff