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/*
* 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
*/
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <errno.h>
const char *
getexecname(void)
{
static char execname[PATH_MAX + 1] = "";
static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
char *ptr = NULL;
ssize_t rc;
(void) pthread_mutex_lock(&mtx);
if (strlen(execname) == 0) {
int error, name[4];
size_t len;
name[0] = CTL_KERN;
name[1] = KERN_PROC;
name[2] = KERN_PROC_PATHNAME;
name[3] = -1;
len = PATH_MAX;
error = sysctl(name, nitems(name), execname, &len, NULL, 0);
if (error != 0) {
rc = -1;
} else {
rc = len;
}
if (rc == -1) {
execname[0] = '\0';
} else {
execname[rc] = '\0';
ptr = execname;
}
} else {
ptr = execname;
}
(void) pthread_mutex_unlock(&mtx);
return (ptr);
}
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