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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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