| 1 | /* $Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $ */ |
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| 2 | /* $NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $ */ |
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| 3 | /*- |
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| 4 | * Copyright (c) 1990, 1993 |
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| 5 | * The Regents of the University of California. All rights reserved. |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms, with or without |
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| 8 | * modification, are permitted provided that the following conditions |
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| 9 | * are met: |
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| 10 | * 1. Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * 3. Neither the name of the University nor the names of its contributors |
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| 16 | * may be used to endorse or promote products derived from this software |
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| 17 | * without specific prior written permission. |
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| 18 | * |
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 29 | * SUCH DAMAGE. |
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| 30 | */ |
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| 31 | |
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| 32 | #if defined __SUNPRO_C || defined __DECC || defined __HP_cc |
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| 33 | # pragma ident "@(#)$Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $" |
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| 34 | # pragma ident "$NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $" |
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| 35 | #endif |
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| 36 | |
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| 37 | #include <fcntl.h> |
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| 38 | #include <stdlib.h> |
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| 39 | #include <unistd.h> |
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| 40 | |
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| 41 | int daemon(int nochdir, int noclose) |
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| 42 | { |
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| 43 | int fd; |
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| 44 | |
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| 45 | switch (fork()) { |
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| 46 | case -1: |
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| 47 | return (-1); |
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| 48 | case 0: |
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| 49 | break; |
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| 50 | default: |
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| 51 | _exit(EXIT_SUCCESS); |
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| 52 | } |
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| 53 | |
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| 54 | if (setsid() == -1) |
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| 55 | return (-1); |
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| 56 | |
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| 57 | if (nochdir == 0) |
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| 58 | (void)chdir("/"); |
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| 59 | |
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| 60 | if (noclose == 0 && (fd = open("/dev/null", O_RDWR, 0)) != -1) { |
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| 61 | (void)dup2(fd, STDIN_FILENO); |
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| 62 | (void)dup2(fd, STDOUT_FILENO); |
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| 63 | (void)dup2(fd, STDERR_FILENO); |
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| 64 | if (fd > STDERR_FILENO) |
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| 65 | (void)close(fd); |
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| 66 | } |
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| 67 | return (0); |
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| 68 | } |
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