172445Sassar/*
2233294Sstas * Copyright (c) 1999 - 2001 Kungliga Tekniska H��gskolan
3233294Sstas * (Royal Institute of Technology, Stockholm, Sweden).
4233294Sstas * All rights reserved.
572445Sassar *
6233294Sstas * Redistribution and use in source and binary forms, with or without
7233294Sstas * modification, are permitted provided that the following conditions
8233294Sstas * are met:
972445Sassar *
10233294Sstas * 1. Redistributions of source code must retain the above copyright
11233294Sstas *    notice, this list of conditions and the following disclaimer.
1272445Sassar *
13233294Sstas * 2. Redistributions in binary form must reproduce the above copyright
14233294Sstas *    notice, this list of conditions and the following disclaimer in the
15233294Sstas *    documentation and/or other materials provided with the distribution.
1672445Sassar *
17233294Sstas * 3. Neither the name of the Institute nor the names of its contributors
18233294Sstas *    may be used to endorse or promote products derived from this software
19233294Sstas *    without specific prior written permission.
2072445Sassar *
21233294Sstas * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22233294Sstas * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23233294Sstas * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24233294Sstas * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25233294Sstas * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26233294Sstas * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27233294Sstas * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28233294Sstas * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29233294Sstas * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30233294Sstas * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31233294Sstas * SUCH DAMAGE.
3272445Sassar */
3372445Sassar
3472445Sassar#include <config.h>
3572445Sassar
36178825Sdfr#include "roken.h"
3772445Sassar
38233294SstasROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL
3972445Sassarpid_file_write (const char *progname)
4072445Sassar{
41233294Sstas    char *ret = NULL;
4272445Sassar    FILE *fp;
4372445Sassar
44233294Sstas    if (asprintf (&ret, "%s%s.pid", _PATH_VARRUN, progname) < 0 || ret == NULL)
4572445Sassar	return NULL;
4672445Sassar    fp = fopen (ret, "w");
4772445Sassar    if (fp == NULL) {
4872445Sassar	free (ret);
4972445Sassar	return NULL;
5072445Sassar    }
5172445Sassar    fprintf (fp, "%u", (unsigned)getpid());
5272445Sassar    fclose (fp);
5372445Sassar    return ret;
5472445Sassar}
5572445Sassar
56233294SstasROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
5772445Sassarpid_file_delete (char **filename)
5872445Sassar{
5972445Sassar    if (*filename != NULL) {
6072445Sassar	unlink (*filename);
6172445Sassar	free (*filename);
6272445Sassar	*filename = NULL;
6372445Sassar    }
6472445Sassar}
6572445Sassar
6672445Sassar#ifndef HAVE_PIDFILE
6772445Sassarstatic char *pidfile_path;
6872445Sassar
6972445Sassarstatic void
7072445Sassarpidfile_cleanup(void)
7172445Sassar{
7272445Sassar    if(pidfile_path != NULL)
7372445Sassar	pid_file_delete(&pidfile_path);
7472445Sassar}
7572445Sassar
76233294SstasROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
7772445Sassarpidfile(const char *basename)
7872445Sassar{
7972445Sassar    if(pidfile_path != NULL)
8072445Sassar	return;
8172445Sassar    if(basename == NULL)
8278527Sassar	basename = getprogname();
8372445Sassar    pidfile_path = pid_file_write(basename);
8490926Snectar#if defined(HAVE_ATEXIT)
8572445Sassar    atexit(pidfile_cleanup);
8690926Snectar#elif defined(HAVE_ON_EXIT)
8790926Snectar    on_exit(pidfile_cleanup);
8890926Snectar#endif
8972445Sassar}
9072445Sassar#endif
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