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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
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include <limits.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) {
rc = readlink("/proc/self/exe",
execname, sizeof (execname) - 1);
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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