71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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#include <string.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <limits.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <errno.h>
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const char *
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getexecname(void)
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{
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static char execname[PATH_MAX + 1] = "";
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static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
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char *ptr = NULL;
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ssize_t rc;
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(void) pthread_mutex_lock(&mtx);
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if (strlen(execname) == 0) {
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int error, name[4];
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size_t len;
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name[0] = CTL_KERN;
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name[1] = KERN_PROC;
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name[2] = KERN_PROC_PATHNAME;
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name[3] = -1;
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len = PATH_MAX;
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error = sysctl(name, nitems(name), execname, &len, NULL, 0);
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if (error != 0) {
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rc = -1;
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} else {
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rc = len;
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}
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if (rc == -1) {
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execname[0] = '\0';
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} else {
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execname[rc] = '\0';
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ptr = execname;
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}
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} else {
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ptr = execname;
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}
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(void) pthread_mutex_unlock(&mtx);
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return (ptr);
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}
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