/*************************************************
*************************************************/
+#ifndef EXIM_HAVE_ABSTRACT_UNIX_SOCKETS
+static void
+unlink_notifier_socket(void)
+{
+uschar * s = expand_string(notifier_socket);
+DEBUG(D_any) debug_printf("unlinking notifier socket %s\n", s);
+Uunlink(s);
+}
+#endif
+
+
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);
+if (daemon_notifier_fd >= 0)
+ {
+ (void) close(daemon_notifier_fd);
+ daemon_notifier_fd = -1;
+#ifndef EXIM_HAVE_ABSTRACT_UNIX_SOCKETS
+ unlink_notifier_socket();
+#endif
+ }
+
for (int i = 0; i < listen_socket_count; i++) (void) close(listen_sockets[i]);
}
signal(SIGCHLD, SIG_IGN);
#endif
signal(SIGTERM, SIG_DFL);
+ signal(SIGINT, SIG_DFL);
/* Attempt to get an id from the sending machine via the RFC 1413
protocol. We do this in the sub-process in order not to hold up the
}
if (message_id[0] == 0) continue; /* No message was accepted */
}
- else
+ else /* bad smtp_setup_msg() */
{
if (smtp_out)
{
{
pid_t dpid;
- /* Before forking, ensure that the C output buffer is flushed. Otherwise
- anything that it in it will get duplicated, leading to duplicate copies
- of the pending output. */
-
- mac_smtp_fflush();
+ /* We used to flush smtp_out before forking so that buffered data was not
+ duplicated, but now we want to pipeline the responses for data and quit.
+ Instead, hard-close the fd underlying smtp_out right after fork to discard
+ the data buffer. */
if ((dpid = exim_fork(US"daemon-accept-delivery")) == 0)
{
(void)fclose(smtp_in);
+ (void)close(fileno(smtp_out));
(void)fclose(smtp_out);
/* Don't ever molest the parent's SSL connection, but do clean up
signal(SIGHUP, SIG_DFL);
signal(SIGCHLD, SIG_DFL);
signal(SIGTERM, SIG_DFL);
+ signal(SIGINT, SIG_DFL);
if (geteuid() != root_uid && !deliver_drop_privilege)
{
if (!*pid_file_path)
pid_file_path = string_sprintf("%s/exim-daemon.pid", spool_directory);
+
+if (pid_file_path[0] != '/')
+ log_write(0, LOG_PANIC_DIE, "pid file path %s must be absolute\n", pid_file_path);
}
{
int pid;
+DEBUG(D_any) debug_printf("SIGTERM/SIGINT seen\n");
#if !defined(DISABLE_TLS) && (defined(EXIM_HAVE_INOTIFY) || defined(EXIM_HAVE_KEVENT))
tls_watch_invalidate();
#endif
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);
- }
+ unlink_notifier_socket();
#endif
}
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",
+ + 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
list = tls_in.on_connect_ports;
sep = 0;
+ /* the list isn't expanded so cannot be tainted. If it ever is we will trap here */
while ((s = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
if (!isdigit(*s))
{
sigterm_seen = FALSE;
os_non_restarting_signal(SIGTERM, main_sigterm_handler);
+os_non_restarting_signal(SIGINT, main_sigterm_handler);
/* If we are to run the queue periodically, pretend the alarm has just gone
off. This will cause the first queue-runner to get kicked off straight away. */
signal(SIGHUP, SIG_DFL);
signal(SIGCHLD, SIG_DFL);
signal(SIGTERM, SIG_DFL);
+ signal(SIGINT, SIG_DFL);
/* Re-exec if privilege has been given up, unless deliver_drop_
privilege is set. Reset SIGALRM before exec(). */
if (f.daemon_listen)
{
- int lcount, select_errno;
+ int lcount;
int max_socket = 0;
BOOL select_failed = FALSE;
fd_set select_listen;
old one had just finished. Preserve the errno from any select() failure for
the use of the common select/accept error processing below. */
- select_errno = errno;
- handle_ending_processes();
- errno = select_errno;
+ {
+ int select_errno = errno;
+ handle_ending_processes();
#ifndef DISABLE_TLS
- /* Create or rotate any required keys; handle (delayed) filewatch event */
- tls_daemon_tick();
+ /* Create or rotate any required keys; handle (delayed) filewatch event */
+ tls_daemon_tick();
#endif
+ errno = select_errno;
+ }
/* Loop for all the sockets that are currently ready to go. If select
actually failed, we have set the count to 1 and select_failed=TRUE, so as
accept_retry_errno = errno;
accept_retry_select_failed = select_failed;
}
- else
- {
- if (errno != accept_retry_errno ||
- select_failed != accept_retry_select_failed ||
- accept_retry_count >= 50)
+ else if ( errno != accept_retry_errno
+ || select_failed != accept_retry_select_failed
+ || accept_retry_count >= 50)
{
- log_write(0, LOG_MAIN | ((accept_retry_count >= 50)? LOG_PANIC : 0),
+ log_write(0, LOG_MAIN | (accept_retry_count >= 50 ? LOG_PANIC : 0),
"%d %s() failure%s: %s",
accept_retry_count,
- accept_retry_select_failed? "select" : "accept",
- (accept_retry_count == 1)? "" : "s",
+ accept_retry_select_failed ? "select" : "accept",
+ accept_retry_count == 1 ? "" : "s",
strerror(accept_retry_errno));
log_close_all();
accept_retry_count = 0;
accept_retry_errno = errno;
accept_retry_select_failed = select_failed;
}
- }
accept_retry_count++;
}
-
- else
- {
- if (accept_retry_count > 0)
- {
- log_write(0, LOG_MAIN, "%d %s() failure%s: %s",
- accept_retry_count,
- accept_retry_select_failed? "select" : "accept",
- (accept_retry_count == 1)? "" : "s",
- strerror(accept_retry_errno));
- log_close_all();
- accept_retry_count = 0;
- }
- }
+ else if (accept_retry_count > 0)
+ {
+ log_write(0, LOG_MAIN, "%d %s() failure%s: %s",
+ accept_retry_count,
+ accept_retry_select_failed ? "select" : "accept",
+ accept_retry_count == 1 ? "" : "s",
+ strerror(accept_retry_errno));
+ log_close_all();
+ accept_retry_count = 0;
+ }
/* If select/accept succeeded, deal with the connection. */
if (accept_socket >= 0)
{
+#ifdef TCP_QUICKACK /* Avoid pure-ACKs while in tls protocol pingpong phase */
+ /* Unfortunately we cannot be certain to do this before a TLS-on-connect
+ Client Hello arrives and is acked. We do it as early as possible. */
+ (void) setsockopt(accept_socket, IPPROTO_TCP, TCP_QUICKACK, US &off, sizeof(off));
+#endif
if (inetd_wait_timeout)
last_connection_time = time(NULL);
handle_smtp_call(listen_sockets, listen_socket_count, accept_socket,
git://git.exim.org / exim.git / blobdiff