diff options
Diffstat (limited to 'server/util/become_daemon.c')
| -rw-r--r-- | server/util/become_daemon.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/server/util/become_daemon.c b/server/util/become_daemon.c deleted file mode 100644 index 4a940eaa1..000000000 --- a/server/util/become_daemon.c +++ /dev/null @@ -1,161 +0,0 @@ -/* - Unix SMB/CIFS implementation. - Samba utility functions - Copyright (C) Andrew Tridgell 1992-1998 - Copyright (C) Jeremy Allison 2001-2002 - Copyright (C) Simo Sorce 2001 - Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003. - Copyright (C) James J Myers 2003 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ - -#define _GNU_SOURCE -#include <stdio.h> -#include <stdbool.h> -#include <unistd.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include "util/util.h" - - -/******************************************************************* - Close the low 3 fd's and open dev/null in their place. -********************************************************************/ -static void close_low_fds(bool stderr_too) -{ -#ifndef VALGRIND - int fd; - int i; - - close(0); - close(1); - - if (stderr_too) - close(2); - - /* try and use up these file descriptors, so silly - library routines writing to stdout etc won't cause havoc */ - for (i=0;i<3;i++) { - if (i == 2 && !stderr_too) - continue; - - fd = open("/dev/null",O_RDWR,0); - if (fd < 0) - fd = open("/dev/null",O_WRONLY,0); - if (fd < 0) { - DEBUG(0,("Can't open /dev/null\n")); - return; - } - if (fd != i) { - DEBUG(0,("Didn't get file descriptor %d\n",i)); - return; - } - } -#endif -} - -/** - Become a daemon, discarding the controlling terminal. -**/ - -void become_daemon(bool Fork) -{ - if (Fork) { - if (fork()) { - _exit(0); - } - } - - /* detach from the terminal */ -#ifdef HAVE_SETSID - setsid(); -#elif defined(TIOCNOTTY) - { - int i = open("/dev/tty", O_RDWR, 0); - if (i != -1) { - ioctl(i, (int) TIOCNOTTY, (char *)0); - close(i); - } - } -#endif /* HAVE_SETSID */ - - /* Close fd's 0,1,2. Needed if started by rsh */ - close_low_fds(false); /* Don't close stderr, let the debug system - attach it to the logfile */ -} - -int pidfile(const char *path, const char *name) -{ - char pid_str[32]; - pid_t pid; - char *file; - int fd; - int ret; - - asprintf(&file, "%s/%s.pid", path, name); - - fd = open(file, O_RDONLY, 0644); - if (fd != -1) { - - pid_str[sizeof(pid_str) -1] = '\0'; - ret = read(fd, pid_str, sizeof(pid_str) -1); - if (ret > 0) { - /* let's check the pid */ - - pid = (pid_t)atoi(pid_str); - if (pid != 0) { - errno = 0; - ret = kill(pid, 0); - if (ret != 0 && errno != ESRCH) { - close(fd); - free(file); - return EEXIST; - } - } - } - - /* notihng in the file or no process */ - close(fd); - unlink(file); - - } else { - if (errno != ENOENT) { - free(file); - return EIO; - } - } - - fd = open(file, O_CREAT | O_WRONLY | O_EXCL, 0644); - if (fd == -1) { - free(file); - return EIO; - } - free(file); - - memset(pid_str, 0, sizeof(pid_str)); - snprintf(pid_str, sizeof(pid_str) -1, "%u\n", (unsigned int) getpid()); - - ret = write(fd, pid_str, strlen(pid_str)); - if (ret != strlen(pid_str)) { - close(fd); - return EIO; - } - - close(fd); - - return 0; -} - |