diff options
Diffstat (limited to 'source3/printing')
| -rw-r--r-- | source3/printing/printing.c | 39 |
1 files changed, 33 insertions, 6 deletions
diff --git a/source3/printing/printing.c b/source3/printing/printing.c index 4051a6ca34..ba88f8ee56 100644 --- a/source3/printing/printing.c +++ b/source3/printing/printing.c @@ -1394,7 +1394,19 @@ main thread of the background lpq updater ****************************************************************************/ void start_background_queue(void) { + /* Use local variables for this as we don't + * need to save the parent side of this, just + * ensure it closes when the process exits. + */ + int pause_pipe[2]; + DEBUG(3,("start_background_queue: Starting background LPQ thread\n")); + + if (pipe(pause_pipe) == -1) { + DEBUG(5,("start_background_queue: cannot create pipe. %s\n", strerror(errno) )); + exit(1); + } + background_lpq_updater_pid = sys_fork(); if (background_lpq_updater_pid == -1) { @@ -1406,6 +1418,9 @@ void start_background_queue(void) /* Child. */ DEBUG(5,("start_background_queue: background LPQ thread started\n")); + close(pause_pipe[0]); + pause_pipe[0] = -1; + if (!reinit_after_fork(smbd_messaging_context(), true)) { DEBUG(0,("reinit_after_fork() failed\n")); smb_panic("reinit_after_fork() failed"); @@ -1420,13 +1435,23 @@ void start_background_queue(void) messaging_register(smbd_messaging_context(), NULL, MSG_PRINTER_UPDATE, print_queue_receive); - + DEBUG(5,("start_background_queue: background LPQ thread waiting for messages\n")); while (1) { - pause(); - + fd_set pause_fds; + int pause_select; + + FD_ZERO(&pause_fds); + FD_SET(pause_pipe[1], &pause_fds); + pause_select = sys_select(pause_pipe[1]+1, &pause_fds, NULL, NULL, NULL); + /* If pause_pipe[0] is closed it means the parent smbd + * and children exited or aborted. */ + if (pause_select == 1) { + exit_server_cleanly(NULL); + } + /* check for some essential signals first */ - + if (got_sig_term) { exit_server_cleanly(NULL); } @@ -1437,9 +1462,9 @@ void start_background_queue(void) reload_services(False); reload_after_sighup = 0; } - + /* now check for messages */ - + DEBUG(10,("start_background_queue: background LPQ thread got a message\n")); message_dispatch(smbd_messaging_context()); @@ -1449,6 +1474,8 @@ void start_background_queue(void) 0); } } + + close(pause_pipe[1]); } /**************************************************************************** |