1 /* $OpenBSD: path.c,v 1.8 2019/12/17 17:16:32 guenther Exp $ */
2
3 /*
4 * Copyright (c) 2013 Kurt Miller <kurt@intricatesoftware.com>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20 #include "path.h"
21 #include "util.h"
22
23 char **
_dl_split_path(const char * searchpath)24 _dl_split_path(const char *searchpath)
25 {
26 int pos = 0;
27 int count = 1;
28 const char *pp, *p_begin;
29 char **retval;
30
31 if (searchpath == NULL)
32 return (NULL);
33
34 /* Count ':' or ';' in searchpath */
35 pp = searchpath;
36 while (*pp) {
37 if (*pp == ':' || *pp == ';')
38 count++;
39 pp++;
40 }
41
42 /* one more for NULL entry */
43 count++;
44
45 retval = _dl_reallocarray(NULL, count, sizeof(*retval));
46 if (retval == NULL)
47 _dl_oom();
48
49 pp = searchpath;
50 while (pp) {
51 p_begin = pp;
52 while (*pp != '\0' && *pp != ':' && *pp != ';')
53 pp++;
54
55 if (p_begin != pp) {
56 retval[pos] = _dl_malloc(pp - p_begin + 1);
57 if (retval[pos] == NULL)
58 _dl_oom();
59
60 _dl_bcopy(p_begin, retval[pos], pp - p_begin);
61 retval[pos++][pp - p_begin] = '\0';
62 }
63
64 if (*pp)
65 pp++;
66 else
67 pp = NULL;
68 }
69
70 retval[pos] = NULL;
71 return (retval);
72 }
73
74 void
_dl_free_path(char ** path)75 _dl_free_path(char **path)
76 {
77 char **p = path;
78
79 if (path == NULL)
80 return;
81
82 while (*p != NULL)
83 _dl_free(*p++);
84
85 _dl_free(path);
86 }
87