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df21c858 | 1 | /* Copyright (C) 1991, 1992, 1996 Free Software Foundation, Inc. |
28f540f4 RM |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Library General Public License as | |
6 | published by the Free Software Foundation; either version 2 of the | |
7 | License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Library General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Library General Public | |
15 | License along with the GNU C Library; see the file COPYING.LIB. If | |
16 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
17 | Cambridge, MA 02139, USA. */ | |
18 | ||
28f540f4 RM |
19 | #include <errno.h> |
20 | #include <limits.h> | |
21 | #include <string.h> | |
22 | #include <unistd.h> | |
23 | ||
24 | /* Put the absolute pathname of the current working direction in BUF. | |
25 | If successful, return BUF. If not, put an error message in | |
26 | BUF and return NULL. BUF should be at least PATH_MAX bytes long. */ | |
27 | char * | |
df21c858 UD |
28 | getwd (buf) |
29 | char *buf; | |
28f540f4 | 30 | { |
df21c858 UD |
31 | #ifndef PATH_MAX |
32 | #define PATH_MAX 1024 | |
33 | char fetchbuf[PATH_MAX]; | |
34 | #else | |
35 | #define fetchbuf buf | |
36 | #endif | |
37 | ||
28f540f4 RM |
38 | if (buf == NULL) |
39 | { | |
40 | errno = EINVAL; | |
41 | return NULL; | |
42 | } | |
43 | ||
df21c858 | 44 | if (getcwd (fetchbuf, PATH_MAX) == NULL) |
28f540f4 | 45 | { |
df21c858 | 46 | strncpy (buf, strerror (errno), PATH_MAX); |
28f540f4 RM |
47 | return NULL; |
48 | } | |
49 | ||
df21c858 UD |
50 | if (fetchbuf != buf) |
51 | strcpy (buf, fetchbuf); | |
52 | ||
28f540f4 RM |
53 | return buf; |
54 | } |