1 /* $NetBSD: write_pid.c,v 1.1.1.1 2011/04/13 18:15:44 elric Exp $ */
2
3 /*
4 * Copyright (c) 1999 - 2001 Kungliga Tekniska Högskolan
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
pid_file_write(const char * progname)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
pid_file_delete(char ** filename)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
pidfile_cleanup(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
pidfile(const char * basename)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