/* upnpd project * * * upnpd device * * This file is part of upnpd. * * * Portions of the code from the MiniUPnP project: * * Copyright (c) 2006-2007, Thomas Bernard * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 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. * * The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. */ #include #include #include #include #include #include #include #include #include "daemonize.h" #include "config.h" #include int daemonize (void) { int pid, i; switch (fork ()) { /* fork error */ case -1: perror ("fork()"); exit (1); /* child process */ case 0: /* obtain a new process group */ if ((pid = setsid ()) < 0) { perror ("setsid()"); exit (1); } else { syslog (LOG_WARNING, "successfully created child process with pid:%d\n", pid); } /* close all descriptors */ for (i = getdtablesize (); i >= 0; --i) close (i); i = open ("/dev/null", O_RDWR); /* open stdin */ umask (027); return pid; /* parent process */ default: exit (0); } } int writepidfile (const char *fname, int pid) { char pidstring[16]; int pidstringlen; int pidfile; if (!fname || (strlen (fname) == 0)) return -1; if ((pidfile = open (fname, O_WRONLY | O_CREAT, 0644)) < 0) { syslog (LOG_WARNING, "Unable to open pidfile for writing %s: %m", fname); return -1; } pidstringlen = snprintf (pidstring, sizeof (pidstring), "%d\n", pid); if (pidstringlen <= 0) { syslog (LOG_WARNING, "Unable to write to pidfile %s: snprintf(): FAILED", fname); close (pidfile); return -1; } else { if (write (pidfile, pidstring, pidstringlen) < 0) syslog (LOG_WARNING, "Unable to write to pidfile %s: %m", fname); } close (pidfile); return 0; } int checkforrunning (const char *fname) { char buffer[64]; int pidfile; pid_t pid; if (!fname || (strlen (fname) == 0)) return -1; if ((pidfile = open (fname, O_RDONLY)) < 0) return 0; memset (buffer, 0, 64); if (read (pidfile, buffer, 63)) { if ((pid = atol (buffer)) > 0) { if (!kill (pid, 0)) { close (pidfile); return -2; } } } close (pidfile); return 0; }