1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 28 #include <limits.h> 29 #include <pthread.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <unistd.h> 33 34 const char * 35 getexecname(void) 36 { 37 static char execname[PATH_MAX + 1] = ""; 38 static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER; 39 char *ptr = NULL; 40 ssize_t rc; 41 42 (void) pthread_mutex_lock(&mtx); 43 44 if (strlen(execname) == 0) { 45 rc = readlink("/proc/self/exe", 46 execname, sizeof (execname) - 1); 47 if (rc == -1) { 48 execname[0] = '\0'; 49 } else { 50 execname[rc] = '\0'; 51 ptr = execname; 52 } 53 } else { 54 ptr = execname; 55 } 56 57 (void) pthread_mutex_unlock(&mtx); 58 return (ptr); 59 } 60