2 /* $OpenBSD: pidfile.c,v 1.5 2002/05/26 09:29:02 deraadt Exp $ */
3 /* $NetBSD: pidfile.c,v 1.4 2001/02/19 22:43:42 cgd Exp $ */
6 * Copyright (c) 1999 The NetBSD Foundation, Inc.
9 * This code is derived from software contributed to The NetBSD Foundation
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
34 #if defined(LIBC_SCCS) && !defined(lint)
35 static const char rcsid[] = "$OpenBSD: pidfile.c,v 1.5 2002/05/26 09:29:02 deraadt Exp $";
36 #endif /* LIBC_SCCS and not lint */
38 #include <sys/param.h>
50 static char *pidfile_path;
51 static pid_t pidfile_pid;
53 static void pidfile_cleanup(void);
55 extern char *__progname;
58 pidfile(const char *basename)
65 basename = __progname;
67 if (pidfile_path != NULL) {
72 /* _PATH_VARRUN includes trailing / */
73 (void) asprintf(&pidfile_path, "%s%s.pid", _PATH_VARRUN, basename);
74 if (pidfile_path == NULL)
77 if ((f = fopen(pidfile_path, "w")) == NULL) {
86 if (fprintf(f, "%ld\n", (long)pid) <= 0 || fclose(f) != 0) {
88 (void) unlink(pidfile_path);
96 if (atexit(pidfile_cleanup) < 0) {
98 (void) unlink(pidfile_path);
110 pidfile_cleanup(void)
113 if (pidfile_path != NULL && pidfile_pid == getpid())
114 (void) unlink(pidfile_path);