xref: /illumos-gate/usr/src/cmd/sgs/link_audit/common/env.c (revision 6a634c9dca3093f3922e4b7ab826d7bdf17bf78e)
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 (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved.
24  */
25 #include <stdlib.h>
26 #include <string.h>
27 #include <stdio.h>
28 #include <sys/types.h>
29 #include <env.h>
30 
31 static const char	*token = ":";
32 
33 void
build_env_list(Elist ** list,const char * env)34 build_env_list(Elist **list, const char *env)
35 {
36 	char	*envstr;
37 	char	*tok;
38 	char	*lasts;
39 
40 	if ((envstr = getenv(env)) == NULL)
41 		return;
42 	envstr = strdup(envstr);
43 	tok = strtok_r(envstr, token, &lasts);
44 	while (tok) {
45 		Elist	*lp;
46 		if ((lp = (Elist *)malloc(sizeof (Elist))) == NULL) {
47 			(void) printf("build_list: malloc failed\n");
48 			exit(1);
49 		}
50 		lp->l_libname = strdup(tok);
51 		lp->l_next = *list;
52 		*list = lp;
53 		tok = strtok_r(NULL, token, &lasts);
54 	}
55 	free(envstr);
56 }
57 
58 
59 Elist *
check_list(Elist * list,const char * str)60 check_list(Elist *list, const char *str)
61 {
62 	const char	*basestr;
63 
64 	if (list == NULL)
65 		return (NULL);
66 
67 	/*
68 	 * Is this a basename or a relative path name
69 	 */
70 	if ((basestr = strrchr(str, '/')) != NULL)
71 		basestr++;
72 	else
73 		basestr = str;
74 
75 
76 	for (; list; list = list->l_next) {
77 		if (strchr(list->l_libname, '/') == NULL) {
78 			if (strcmp(basestr, list->l_libname) == 0)
79 				return (list);
80 		} else {
81 			if (strcmp(str, list->l_libname) == 0)
82 				return (list);
83 		}
84 	}
85 	return (NULL);
86 }
87 
88 char *
checkenv(const char * env)89 checkenv(const char *env)
90 {
91 	char	*envstr;
92 	if ((envstr = getenv(env)) == NULL)
93 		return (NULL);
94 	while (*envstr == ' ')
95 		envstr++;
96 	if (*envstr == '\0')
97 		return (NULL);
98 	return (envstr);
99 }
100