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https://bugzilla.samba.org/show_bug.cgi?id=11200 Signed-off-by: Andreas Schneider <asn@samba.org> Reviewed-by: Alexander Bokovoy <ab@samba.org> Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org> Autobuild-Date(master): Wed Apr 8 15:06:26 CEST 2015 on sn-devel-104
137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Jeremy Allison 2001-2002
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Copyright (C) Simo Sorce 2001
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Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
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Copyright (C) James J Myers 2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "system/filesys.h"
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#include "system/locale.h"
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#if HAVE_LIBSYSTEMD_DAEMON
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#include <systemd/sd-daemon.h>
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#endif
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#include "lib/util/close_low_fd.h"
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/*******************************************************************
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Close the low 3 fd's and open dev/null in their place.
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********************************************************************/
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_PUBLIC_ void close_low_fds(bool stdin_too, bool stdout_too, bool stderr_too)
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{
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if (stdin_too) {
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int ret = close_low_fd(0);
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if (ret != 0) {
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DEBUG(0, ("%s: close_low_fd(0) failed: %s\n",
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__func__, strerror(ret)));
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}
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}
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if (stdout_too) {
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int ret = close_low_fd(1);
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if (ret != 0) {
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DEBUG(0, ("%s: close_low_fd(1) failed: %s\n",
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__func__, strerror(ret)));
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}
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}
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if (stderr_too) {
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int ret = close_low_fd(2);
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if (ret != 0) {
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DEBUG(0, ("%s: close_low_fd(2) failed: %s\n",
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__func__, strerror(ret)));
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}
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}
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}
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/****************************************************************************
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Become a daemon, discarding the controlling terminal.
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****************************************************************************/
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_PUBLIC_ void become_daemon(bool do_fork, bool no_process_group, bool log_stdout)
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{
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pid_t newpid;
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if (do_fork) {
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newpid = fork();
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if (newpid) {
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#if HAVE_LIBSYSTEMD_DAEMON
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sd_notifyf(0, "READY=0\nSTATUS=Starting process...\nMAINPID=%lu", (unsigned long) newpid);
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#endif /* HAVE_LIBSYSTEMD_DAEMON */
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_exit(0);
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}
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}
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/* detach from the terminal */
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#ifdef HAVE_SETSID
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if (!no_process_group) setsid();
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#elif defined(TIOCNOTTY)
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if (!no_process_group) {
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int i = open("/dev/tty", O_RDWR, 0);
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if (i != -1) {
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ioctl(i, (int) TIOCNOTTY, (char *)0);
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close(i);
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}
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}
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#endif /* HAVE_SETSID */
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/* Close fd's 0,1,2 as appropriate. Needed if started by rsh. */
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/* stdin must be open if we do not fork, for monitoring for
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* close. stdout must be open if we are logging there, and we
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* never close stderr (but debug might dup it onto a log file) */
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close_low_fds(do_fork, !log_stdout, false);
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}
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_PUBLIC_ void exit_daemon(const char *msg, int error)
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{
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#ifdef HAVE_LIBSYSTEMD_DAEMON
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if (msg == NULL) {
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msg = strerror(error);
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}
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sd_notifyf(0, "STATUS=daemon failed to start: %s\n"
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"ERRNO=%i",
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msg,
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error);
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#endif
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DEBUG(0, ("STATUS=daemon failed to start: %s, error code %d\n", msg, error));
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exit(1);
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}
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_PUBLIC_ void daemon_ready(const char *name)
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{
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if (name == NULL) {
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name = "Samba";
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}
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#ifdef HAVE_LIBSYSTEMD_DAEMON
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sd_notifyf(0, "READY=1\nSTATUS=%s: ready to serve connections...", name);
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#endif
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DEBUG(0, ("STATUS=daemon '%s' finished starting up and ready to serve "
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"connections\n", name));
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}
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_PUBLIC_ void daemon_status(const char *name, const char *msg)
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{
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if (name == NULL) {
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name = "Samba";
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}
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#ifdef HAVE_LIBSYSTEMD_DAEMON
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sd_notifyf(0, "\nSTATUS=%s: %s", name, msg);
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#endif
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DEBUG(0, ("STATUS=daemon '%s' : %s", name, msg));
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}
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