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suricata/src/util-pidfile.c

70 lines
1.9 KiB
C

/* Copyright (c) 2010 Open Infomation Security Foundation */
/**
* \file
* \author Pablo Rincon Crespo <pablo.rincon.crespo@gmail.com>
* Adaptation of Steve Grubbs patch to our conding guidelines
* (thanks for the patch Steve ;)
* \author Victor Julien <victor@inliniac.net>
*/
#include "suricata-common.h"
#include "util-pidfile.h"
/**
* \brief Write a pid file (used at the startup)
* This commonly needed by the init scripts
*
* \param pointer to the name of the pid file to write (optarg)
*
* \retval 0 if succes
* \retval -1 on failure
*/
int SCPidfileCreate(const char *pidfile)
{
SCEnter();
int pidfd = 0;
char val[16];
size_t len = snprintf(val, sizeof(val), "%"PRIuMAX"\n", (uintmax_t)getpid());
if (len <= 0) {
SCLogError(SC_ERR_PIDFILE_SNPRINTF, "Pid error (%s)", strerror(errno));
SCReturnInt(-1);
}
pidfd = open(pidfile, O_CREAT | O_TRUNC | O_NOFOLLOW | O_WRONLY, 0644);
if (pidfd < 0) {
SCLogError(SC_ERR_PIDFILE_OPEN, "unable to set pidfile: %s", strerror(errno));
SCReturnInt(-1);
}
ssize_t r = write(pidfd, val, (unsigned int)len);
if (r == -1) {
SCLogError(SC_ERR_PIDFILE_WRITE, "unable to write pidfile: %s", strerror(errno));
close(pidfd);
SCReturnInt(-1);
} else if ((size_t)r != len) {
SCLogError(SC_ERR_PIDFILE_WRITE, "unable to write pidfile: wrote"
" %"PRIdMAX" of %"PRIuMAX" bytes.", (intmax_t)r, (uintmax_t)len);
close(pidfd);
SCReturnInt(-1);
}
close(pidfd);
SCReturnInt(0);
}
/**
* \brief Remove the pid file (used at the startup)
*
* \param pointer to the name of the pid file to write (optarg)
*/
void SCPidfileRemove(const char *pid_filename) {
if (pid_filename != NULL) {
/* we ignore the result, the user may have removed the file already. */
(void)unlink(pid_filename);
}
}