blob: 28f26eb179ff37fae4965070aee983a414e2966a (
plain)
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
|
/* Emulate getcwd using getwd.
This function is in the public domain. */
/*
@deftypefn Supplemental char* getcwd (char *@var{pathname}, int @var{len})
Copy the absolute pathname for the current working directory into
@var{pathname}, which is assumed to point to a buffer of at least
@var{len} bytes, and return a pointer to the buffer. If the current
directory's path doesn't fit in @var{len} characters, the result is
@code{NULL} and @code{errno} is set. If @var{pathname} is a null pointer,
@code{getcwd} will obtain @var{len} bytes of space using
@code{malloc}.
@end deftypefn
*/
#include "config.h"
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include <errno.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
extern char *getwd ();
extern int errno;
#ifndef MAXPATHLEN
#define MAXPATHLEN 1024
#endif
char *
getcwd (char *buf, size_t len)
{
char ourbuf[MAXPATHLEN];
char *result;
result = getwd (ourbuf);
if (result) {
if (strlen (ourbuf) >= len) {
errno = ERANGE;
return 0;
}
if (!buf) {
buf = (char*)malloc(len);
if (!buf) {
errno = ENOMEM;
return 0;
}
}
strcpy (buf, ourbuf);
}
return buf;
}
|
