| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 | Samba utility functions
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| 4 | Copyright (C) Andrew Tridgell 1992-1998
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| 5 | Copyright (C) Jeremy Allison 2001-2002
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| 6 | Copyright (C) Simo Sorce 2001
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| 7 | Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
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| 8 | Copyright (C) James J Myers 2003
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| 9 |
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| 10 | This program is free software; you can redistribute it and/or modify
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| 11 | it under the terms of the GNU General Public License as published by
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| 12 | the Free Software Foundation; either version 3 of the License, or
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| 13 | (at your option) any later version.
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| 14 |
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| 15 | This program is distributed in the hope that it will be useful,
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| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | GNU General Public License for more details.
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| 19 |
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| 20 | You should have received a copy of the GNU General Public License
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| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 22 | */
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| 23 |
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| 24 | #include "includes.h"
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| 25 | #include "system/filesys.h"
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| 26 | #include "system/locale.h"
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| 27 | #if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
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| 28 | #include <systemd/sd-daemon.h>
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| 29 | #endif
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| 30 | #include "lib/util/close_low_fd.h"
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| 31 |
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| 32 | /*******************************************************************
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| 33 | Close the low 3 fd's and open dev/null in their place.
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| 34 | ********************************************************************/
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| 35 |
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| 36 | _PUBLIC_ void close_low_fds(bool stdin_too, bool stdout_too, bool stderr_too)
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| 37 | {
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| 38 |
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| 39 | if (stdin_too) {
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| 40 | int ret = close_low_fd(0);
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| 41 | if (ret != 0) {
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| 42 | DEBUG(0, ("%s: close_low_fd(0) failed: %s\n",
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| 43 | __func__, strerror(ret)));
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| 44 | }
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| 45 | }
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| 46 | if (stdout_too) {
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| 47 | int ret = close_low_fd(1);
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| 48 | if (ret != 0) {
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| 49 | DEBUG(0, ("%s: close_low_fd(1) failed: %s\n",
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| 50 | __func__, strerror(ret)));
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| 51 | }
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| 52 | }
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| 53 | if (stderr_too) {
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| 54 | int ret = close_low_fd(2);
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| 55 | if (ret != 0) {
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| 56 | DEBUG(0, ("%s: close_low_fd(2) failed: %s\n",
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| 57 | __func__, strerror(ret)));
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| 58 | }
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| 59 | }
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| 60 | }
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| 61 |
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| 62 | /****************************************************************************
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| 63 | Become a daemon, discarding the controlling terminal.
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| 64 | ****************************************************************************/
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| 65 |
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| 66 | _PUBLIC_ void become_daemon(bool do_fork, bool no_process_group, bool log_stdout)
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| 67 | {
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| 68 | pid_t newpid;
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| 69 | if (do_fork) {
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| 70 | newpid = fork();
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| 71 | if (newpid) {
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| 72 | #if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
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| 73 | sd_notifyf(0, "READY=0\nSTATUS=Starting process...\nMAINPID=%lu", (unsigned long) newpid);
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| 74 | #endif /* HAVE_LIBSYSTEMD_DAEMON */
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| 75 | _exit(0);
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| 76 | }
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| 77 | }
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| 78 |
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| 79 | /* detach from the terminal */
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| 80 | #ifdef HAVE_SETSID
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| 81 | if (!no_process_group) setsid();
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| 82 | #elif defined(TIOCNOTTY)
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| 83 | if (!no_process_group) {
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| 84 | int i = open("/dev/tty", O_RDWR, 0);
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| 85 | if (i != -1) {
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| 86 | ioctl(i, (int) TIOCNOTTY, (char *)0);
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| 87 | close(i);
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| 88 | }
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| 89 | }
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| 90 | #endif /* HAVE_SETSID */
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| 91 |
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| 92 | /* Close fd's 0,1,2 as appropriate. Needed if started by rsh. */
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| 93 | /* stdin must be open if we do not fork, for monitoring for
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| 94 | * close. stdout must be open if we are logging there, and we
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| 95 | * never close stderr (but debug might dup it onto a log file) */
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| 96 | close_low_fds(do_fork, !log_stdout, false);
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| 97 | }
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| 98 |
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| 99 | _PUBLIC_ void exit_daemon(const char *msg, int error)
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| 100 | {
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| 101 | #if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
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| 102 | if (msg == NULL) {
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| 103 | msg = strerror(error);
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| 104 | }
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| 105 |
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| 106 | sd_notifyf(0, "STATUS=daemon failed to start: %s\n"
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| 107 | "ERRNO=%i",
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| 108 | msg,
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| 109 | error);
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| 110 | #endif
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| 111 | DEBUG(0, ("STATUS=daemon failed to start: %s, error code %d\n", msg, error));
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| 112 | exit(1);
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| 113 | }
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| 114 |
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| 115 | _PUBLIC_ void daemon_ready(const char *name)
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| 116 | {
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| 117 | if (name == NULL) {
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| 118 | name = "Samba";
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| 119 | }
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| 120 | #if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
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| 121 | sd_notifyf(0, "READY=1\nSTATUS=%s: ready to serve connections...", name);
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| 122 | #endif
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| 123 | DEBUG(0, ("STATUS=daemon '%s' finished starting up and ready to serve "
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| 124 | "connections\n", name));
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| 125 | }
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| 126 |
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| 127 | _PUBLIC_ void daemon_status(const char *name, const char *msg)
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| 128 | {
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| 129 | if (name == NULL) {
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| 130 | name = "Samba";
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| 131 | }
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| 132 | #if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
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| 133 | sd_notifyf(0, "\nSTATUS=%s: %s", name, msg);
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| 134 | #endif
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| 135 | DEBUG(0, ("STATUS=daemon '%s' : %s", name, msg));
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| 136 | }
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