1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/* $OpenBSD: dl_dirname.c,v 1.1 2013/04/05 12:58:03 kurt Exp $ */
/*
* Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include "archdep.h"
/*
* This file was copied from libc/stdlib/realpath.c and modified for ld.so's
* syscall method which returns -errno.
*/
char *
_dl_dirname(const char *path)
{
static char dname[MAXPATHLEN];
size_t len;
const char *endp;
/* Empty or NULL string gets treated as "." */
if (path == NULL || *path == '\0') {
dname[0] = '.';
dname[1] = '\0';
return (dname);
}
/* Strip any trailing slashes */
endp = path + strlen(path) - 1;
while (endp > path && *endp == '/')
endp--;
/* Find the start of the dir */
while (endp > path && *endp != '/')
endp--;
/* Either the dir is "/" or there are no slashes */
if (endp == path) {
dname[0] = *endp == '/' ? '/' : '.';
dname[1] = '\0';
return (dname);
} else {
/* Move forward past the separating slashes */
do {
endp--;
} while (endp > path && *endp == '/');
}
len = endp - path + 1;
if (len >= sizeof(dname)) {
return (NULL);
}
_dl_bcopy(path, dname, len);
dname[len] = '\0';
return (dname);
}
|
