0fcefb433d
The NetBSD Foundation states "Third parties are encouraged to change the license on any files which have a 4-clause license contributed to the NetBSD Foundation to a 2-clause license." This change removes clauses 3 and 4 from copyright / license blocks that list The NetBSD Foundation as the only copyright holder. Sponsored by: The FreeBSD Foundation
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/* $FreeBSD$ */
|
|
/* $OpenBSD: pidfile.c,v 1.5 2002/05/26 09:29:02 deraadt Exp $ */
|
|
/* $NetBSD: pidfile.c,v 1.4 2001/02/19 22:43:42 cgd Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1999 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Jason R. Thorpe.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static const char rcsid[] = "$OpenBSD: pidfile.c,v 1.5 2002/05/26 09:29:02 deraadt Exp $";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <sys/param.h>
|
|
#include <errno.h>
|
|
#include <paths.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#ifdef __FreeBSD__
|
|
#include "pidfile.h"
|
|
#else
|
|
#include <util.h>
|
|
#endif
|
|
|
|
static char *pidfile_path;
|
|
static pid_t pidfile_pid;
|
|
|
|
static void pidfile_cleanup(void);
|
|
|
|
extern char *__progname;
|
|
|
|
int
|
|
pidfile(const char *basename)
|
|
{
|
|
FILE *f;
|
|
int save_errno;
|
|
pid_t pid;
|
|
|
|
if (basename == NULL)
|
|
basename = __progname;
|
|
|
|
if (pidfile_path != NULL) {
|
|
free(pidfile_path);
|
|
pidfile_path = NULL;
|
|
}
|
|
|
|
/* _PATH_VARRUN includes trailing / */
|
|
(void) asprintf(&pidfile_path, "%s%s.pid", _PATH_VARRUN, basename);
|
|
if (pidfile_path == NULL)
|
|
return (-1);
|
|
|
|
if ((f = fopen(pidfile_path, "w")) == NULL) {
|
|
save_errno = errno;
|
|
free(pidfile_path);
|
|
pidfile_path = NULL;
|
|
errno = save_errno;
|
|
return (-1);
|
|
}
|
|
|
|
pid = getpid();
|
|
if (fprintf(f, "%ld\n", (long)pid) <= 0 || fclose(f) != 0) {
|
|
save_errno = errno;
|
|
(void) unlink(pidfile_path);
|
|
free(pidfile_path);
|
|
pidfile_path = NULL;
|
|
errno = save_errno;
|
|
return (-1);
|
|
}
|
|
|
|
pidfile_pid = pid;
|
|
if (atexit(pidfile_cleanup) < 0) {
|
|
save_errno = errno;
|
|
(void) unlink(pidfile_path);
|
|
free(pidfile_path);
|
|
pidfile_path = NULL;
|
|
pidfile_pid = 0;
|
|
errno = save_errno;
|
|
return (-1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
pidfile_cleanup(void)
|
|
{
|
|
|
|
if (pidfile_path != NULL && pidfile_pid == getpid())
|
|
(void) unlink(pidfile_path);
|
|
}
|