rcapd_stat.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "rcapd_stat.h"
/*
* Return the pid of the writer of the statistics file.
*/
pid_t
stat_get_rcapd_pid(char *file)
{
int fd;
rcapd_stat_hdr_t hdr;
char procfile[20];
struct stat st;
if ((fd = open(file, O_RDONLY)) < 0)
return (-1);
if (read(fd, &hdr, sizeof (hdr)) != sizeof (hdr)) {
(void) close(fd);
return (-1);
}
(void) close(fd);
(void) snprintf(procfile, 20, "/proc/%d/psinfo", (int)hdr.rs_pid);
if (stat(procfile, &st) == 0)
return (hdr.rs_pid);
else
return (-1);
}