hush/networking/udhcp/pidfile.c
Eric Andersen aff114c33d Larry Doolittle writes:
This is a bulk spelling fix patch against busybox-1.00-pre10.
If anyone gets a corrupted copy (and cares), let me know and
I will make alternate arrangements.

Erik - please apply.

Authors - please check that I didn't corrupt any meaning.

Package importers - see if any of these changes should be
passed to the upstream authors.

I glossed over lots of sloppy capitalizations, missing apostrophes,
mixed American/British spellings, and German-style compound words.

What is "pretect redefined for test" in cmdedit.c?

Good luck on the 1.00 release!

      - Larry
2004-04-14 17:51:38 +00:00

76 lines
1.7 KiB
C

/* pidfile.c
*
* Functions to assist in the writing and removing of pidfiles.
*
* Russ Dill <Russ.Dill@asu.edu> September 2001
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include "pidfile.h"
#include "common.h"
static char *saved_pidfile;
static void pidfile_delete(void)
{
if (saved_pidfile) unlink(saved_pidfile);
}
int pidfile_acquire(const char *pidfile)
{
int pid_fd;
if (!pidfile) return -1;
pid_fd = open(pidfile, O_CREAT | O_WRONLY, 0644);
if (pid_fd < 0) {
LOG(LOG_ERR, "Unable to open pidfile %s: %m\n", pidfile);
} else {
lockf(pid_fd, F_LOCK, 0);
if (!saved_pidfile)
atexit(pidfile_delete);
saved_pidfile = (char *) pidfile;
}
return pid_fd;
}
void pidfile_write_release(int pid_fd)
{
FILE *out;
if (pid_fd < 0) return;
if ((out = fdopen(pid_fd, "w")) != NULL) {
fprintf(out, "%d\n", getpid());
fclose(out);
}
lockf(pid_fd, F_UNLCK, 0);
close(pid_fd);
}