release/src/router/minidlna/daemonize.h

   1 /* MiniUPnP project
   2  * http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
   3  *
   4  * Copyright (c) 2006, Thomas Bernard
   5  * 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 are met:
   9  *     * Redistributions of source code must retain the above copyright
  10  *       notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above copyright
  12  *       notice, this list of conditions and the following disclaimer in the
  13  *       documentation and/or other materials provided with the distribution.
  14  *     * The name of the author may not be used to endorse or promote products
  15  *       derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  21  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  */
  29 #ifndef __DAEMONIZE_H__
  30 #define __DAEMONIZE_H__
  31
  32 #include "config.h"
  33
  34 #ifndef USE_DAEMON
  35 /* daemonize()
  36  * "fork" to background, detach from terminal, etc...
  37  * returns: pid of the daemon, exits upon failure */
  38 int
  39 daemonize(void);
  40 #endif
  41
  42 /* writepidfile()
  43  * write the pid to a file */
  44 int
  45 writepidfile(const char * fname, int pid);
  46
  47 /* checkforrunning()
  48  * check for another instance running
  49  * returns: 0 only instance
  50  *          -1 invalid filename
  51  *          -2 another instance running  */
  52 int
  53 checkforrunning(const char * fname);
  54
  55 #endif
  56