| 1 | /*-
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| 2 | * Copyright (c) 1990, 1993
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| 3 | * The Regents of the University of California. All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of the University nor the names of its contributors
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| 14 | * may be used to endorse or promote products derived from this software
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| 15 | * without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 27 | * SUCH DAMAGE.
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| 28 | */
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| 29 |
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| 30 | #if defined(LIBC_SCCS) && !defined(lint)
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| 31 | static char sccsid[] = "@(#)daemon.c 8.1 (Berkeley) 6/4/93";
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| 32 | #endif /* LIBC_SCCS and not lint */
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| 33 |
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| 34 | #include <config.h>
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| 35 |
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| 36 | #ifndef HAVE_DAEMON
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| 37 |
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| 38 | #ifdef HAVE_FCNTL_H
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| 39 | #include <fcntl.h>
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| 40 | #endif
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| 41 | #ifdef HAVE_PATHS_H
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| 42 | #include <paths.h>
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| 43 | #endif
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| 44 | #ifdef HAVE_UNISTD_H
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| 45 | #include <unistd.h>
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| 46 | #endif
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| 47 |
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| 48 | #include "roken.h"
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| 49 |
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| 50 | ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
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| 51 | daemon(int nochdir, int noclose)
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| 52 | {
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| 53 | int fd;
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| 54 |
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| 55 | switch (fork()) {
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| 56 | case -1:
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| 57 | return (-1);
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| 58 | case 0:
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| 59 | break;
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| 60 | default:
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| 61 | _exit(0);
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| 62 | }
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| 63 |
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| 64 | if (setsid() == -1)
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| 65 | return (-1);
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| 66 |
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| 67 | if (!nochdir)
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| 68 | chdir("/");
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| 69 |
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| 70 | if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
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| 71 | dup2(fd, STDIN_FILENO);
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| 72 | dup2(fd, STDOUT_FILENO);
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| 73 | dup2(fd, STDERR_FILENO);
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| 74 | if (fd > 2)
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| 75 | close (fd);
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| 76 | }
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| 77 | return (0);
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| 78 | }
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| 79 |
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| 80 | #endif /* HAVE_DAEMON */
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