diff options
Diffstat (limited to 'lib/libutil/daemon.c')
| -rw-r--r-- | lib/libutil/daemon.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/lib/libutil/daemon.c b/lib/libutil/daemon.c new file mode 100644 index 000000000000..f4e663c8de26 --- /dev/null +++ b/lib/libutil/daemon.c @@ -0,0 +1,65 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)daemon.c 5.3 (Berkeley) 12/28/90"; +#endif /* LIBC_SCCS and not lint */ + +#include <sys/fcntl.h> +#include <unistd.h> +#include <paths.h> + +daemon(nochdir, noclose) + int nochdir, noclose; +{ + int cpid; + + if ((cpid = fork()) == -1) + return (-1); + if (cpid) + exit(0); + (void) setsid(); + if (!nochdir) + (void) chdir("/"); + if (!noclose) { + int devnull = open(_PATH_DEVNULL, O_RDWR, 0); + + if (devnull != -1) { + (void) dup2(devnull, STDIN_FILENO); + (void) dup2(devnull, STDOUT_FILENO); + (void) dup2(devnull, STDERR_FILENO); + if (devnull > 2) + (void) close(devnull); + } + } +} |