1/* Obsolete function to get current working directory.
2 Copyright (C) 1991-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <limits.h>
21#include <string.h>
22#include <unistd.h>
23
24
25char *
26getwd (char *buf)
27{
28#ifndef PATH_MAX
29#define PATH_MAX 1024
30#endif
31 char tmpbuf[PATH_MAX];
32
33 if (buf == NULL)
34 {
35 __set_errno (EINVAL);
36 return NULL;
37 }
38
39 if (__getcwd (tmpbuf, PATH_MAX) == NULL)
40 {
41 /* We use 1024 here since it should really be enough and because
42 this is a safe value. */
43 __strerror_r (errno, buf, 1024);
44 return NULL;
45 }
46
47 /* This is completely unsafe. Nobody can say how big the user
48 provided buffer is. Perhaps the application and the libc
49 disagree about the value of PATH_MAX. */
50 return strcpy (buf, tmpbuf);
51}
52
53link_warning (getwd,
54 "the `getwd' function is dangerous and should not be used.")
55