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
|
/* $OpenBSD: basename.c,v 1.14 2005/08/08 08:05:33 espie 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 <errno.h>
#include <libgen.h>
#include <string.h>
#include <sys/param.h>
char *
basename(const char *path)
{
static char bname[MAXPATHLEN];
size_t len;
const char *endp, *startp;
/* Empty or NULL string gets treated as "." */
if (path == NULL || *path == '\0') {
bname[0] = '.';
bname[1] = '\0';
return (bname);
}
/* Strip any trailing slashes */
endp = path + strlen(path) - 1;
while (endp > path && *endp == '/')
endp--;
/* All slashes becomes "/" */
if (endp == path && *endp == '/') {
bname[0] = '/';
bname[1] = '\0';
return (bname);
}
/* Find the start of the base */
startp = endp;
while (startp > path && *(startp - 1) != '/')
startp--;
len = endp - startp + 1;
if (len >= sizeof(bname)) {
errno = ENAMETOOLONG;
return (NULL);
}
memcpy(bname, startp, len);
bname[len] = '\0';
return (bname);
}
|
