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Diffstat (limited to 'libbb/daemon.c')
| -rw-r--r-- | libbb/daemon.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/libbb/daemon.c b/libbb/daemon.c new file mode 100644 index 000000000..55a776ce0 --- /dev/null +++ b/libbb/daemon.c @@ -0,0 +1,103 @@ +/* vi: set sw=4 ts=4: */ +/* + * daemon implementation for uClibc + * + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Modified for uClibc by Erik Andersen + * <andersee@debian.org>, <andersen@lineo.com> + * + * The uClibc Library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * The GNU C Library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with the GNU C Library; see the file COPYING.LIB. If not, + * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + * + * Original copyright notice is retained at the end of this file. + */ + +#include <features.h> +#include <fcntl.h> +#include <paths.h> +#include <unistd.h> + + +/* Stupid libc doesn't have a reliable way for use to know + * that libc5 is being used. Assume this is good enough */ +#if ! defined __GLIBC__ && ! defined __UCLIBC__ + +int daemon( int nochdir, int noclose ) +{ + int fd; + + switch (fork()) { + case -1: + return(-1); + case 0: + break; + default: + _exit(0); + } + + if (setsid() == -1) + return(-1); + + if (!nochdir) + chdir("/"); + + if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { + dup2(fd, STDIN_FILENO); + dup2(fd, STDOUT_FILENO); + dup2(fd, STDERR_FILENO); + if (fd > 2) + close(fd); + } + return(0); +} +#endif + + +/*- + * Copyright (c) 1990, 1993 + * 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. <BSD Advertising Clause omitted per the July 22, 1999 licensing change + * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> + * + * 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. + */ + + |