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94 lines
2.3 KiB
C
94 lines
2.3 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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/*******************************************************************
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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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static void close_low_fds(bool stderr_too)
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{
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#ifndef VALGRIND
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int fd;
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int i;
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close(0);
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close(1);
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if (stderr_too)
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close(2);
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/* try and use up these file descriptors, so silly
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library routines writing to stdout etc won't cause havoc */
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for (i=0;i<3;i++) {
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if (i == 2 && !stderr_too)
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continue;
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fd = open("/dev/null",O_RDWR,0);
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if (fd < 0)
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fd = open("/dev/null",O_WRONLY,0);
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if (fd < 0) {
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DEBUG(0,("Can't open /dev/null\n"));
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return;
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}
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if (fd != i) {
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DEBUG(0,("Didn't get file descriptor %d\n",i));
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return;
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}
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}
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#endif
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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 Fork)
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{
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if (Fork) {
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if (fork()) {
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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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setsid();
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#elif defined(TIOCNOTTY)
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{
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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. Needed if started by rsh */
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close_low_fds(false); /* Don't close stderr, let the debug system
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attach it to the logfile */
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}
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