Home | History | Annotate | Line # | Download | only in roken
write_pid.c revision 1.1 
      1 /*	$NetBSD: write_pid.c,v 1.1 2011/04/13 18:15:44 elric Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1999 - 2001 Kungliga Tekniska Hgskolan
      5  * (Royal Institute of Technology, Stockholm, Sweden).
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. Neither the name of the Institute nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <config.h>
     37 
     38 #include <krb5/roken.h>
     39 
     40 ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL
     41 pid_file_write (const char *progname)
     42 {
     43     char *ret = NULL;
     44     FILE *fp;
     45 
     46     if (asprintf (&ret, "%s%s.pid", _PATH_VARRUN, progname) < 0 || ret == NULL)
     47 	return NULL;
     48     fp = fopen (ret, "w");
     49     if (fp == NULL) {
     50 	free (ret);
     51 	return NULL;
     52     }
     53     fprintf (fp, "%u", (unsigned)getpid());
     54     fclose (fp);
     55     return ret;
     56 }
     57 
     58 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
     59 pid_file_delete (char **filename)
     60 {
     61     if (*filename != NULL) {
     62 	unlink (*filename);
     63 	free (*filename);
     64 	*filename = NULL;
     65     }
     66 }
     67 
     68 #ifndef HAVE_PIDFILE
     69 static char *pidfile_path;
     70 
     71 static void
     72 pidfile_cleanup(void)
     73 {
     74     if(pidfile_path != NULL)
     75 	pid_file_delete(&pidfile_path);
     76 }
     77 
     78 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
     79 pidfile(const char *basename)
     80 {
     81     if(pidfile_path != NULL)
     82 	return;
     83     if(basename == NULL)
     84 	basename = getprogname();
     85     pidfile_path = pid_file_write(basename);
     86 #if defined(HAVE_ATEXIT)
     87     atexit(pidfile_cleanup);
     88 #elif defined(HAVE_ON_EXIT)
     89     on_exit(pidfile_cleanup);
     90 #endif
     91 }
     92 #endif
     93