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Member "memcached-1.6.15/daemon.c" (21 Feb 2022, 3095 Bytes) of package /linux/www/memcached-1.6.15.tar.gz:


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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 $    */
    2 /*    $NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $    */
    3 /*-
    4  * Copyright (c) 1990, 1993
    5  *    The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 #if defined __SUNPRO_C || defined __DECC || defined __HP_cc
   33 # pragma ident "@(#)$Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $"
   34 # pragma ident "$NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $"
   35 #endif
   36 
   37 #include <fcntl.h>
   38 #include <stdio.h>
   39 #include <stdlib.h>
   40 #include <unistd.h>
   41 
   42 #include "memcached.h"
   43 
   44 int daemonize(int nochdir, int noclose)
   45 {
   46     int fd;
   47 
   48     switch (fork()) {
   49     case -1:
   50         return (-1);
   51     case 0:
   52         break;
   53     default:
   54         _exit(EXIT_SUCCESS);
   55     }
   56 
   57     if (setsid() == -1)
   58         return (-1);
   59 
   60     if (nochdir == 0) {
   61         if(chdir("/") != 0) {
   62             perror("chdir");
   63             return (-1);
   64         }
   65     }
   66 
   67     if (noclose == 0 && (fd = open("/dev/null", O_RDWR, 0)) != -1) {
   68         if(dup2(fd, STDIN_FILENO) < 0) {
   69             perror("dup2 stdin");
   70             goto err_cleanup;
   71         }
   72         if(dup2(fd, STDOUT_FILENO) < 0) {
   73             perror("dup2 stdout");
   74             goto err_cleanup;
   75         }
   76         if(dup2(fd, STDERR_FILENO) < 0) {
   77             perror("dup2 stderr");
   78             goto err_cleanup;
   79         }
   80 
   81         if(close(fd) < 0) {
   82             perror("close");
   83             return (-1);
   84         }
   85     }
   86     return (0);
   87 
   88     err_cleanup:
   89         close(fd);
   90         return (-1);
   91 }