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a26baf28 BB |
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 <string.h> | |
29 | #include <unistd.h> | |
30 | #include <pthread.h> | |
31 | #include <limits.h> | |
32 | ||
33 | const char * | |
34 | getexecname(void) | |
35 | { | |
36 | static char execname[PATH_MAX + 1] = ""; | |
37 | static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER; | |
38 | char *ptr = NULL; | |
39 | ssize_t rc; | |
40 | ||
9a875c6c | 41 | (void) pthread_mutex_lock(&mtx); |
a26baf28 BB |
42 | |
43 | if (strlen(execname) == 0) { | |
d1d7e268 MK |
44 | rc = readlink("/proc/self/exe", |
45 | execname, sizeof (execname) - 1); | |
a26baf28 BB |
46 | if (rc == -1) { |
47 | execname[0] = '\0'; | |
48 | } else { | |
49 | execname[rc] = '\0'; | |
50 | ptr = execname; | |
51 | } | |
52 | } else { | |
53 | ptr = execname; | |
54 | } | |
55 | ||
9a875c6c | 56 | (void) pthread_mutex_unlock(&mtx); |
d1d7e268 | 57 | return (ptr); |
a26baf28 | 58 | } |