1/* Copyright (C) 1992-2024 Free Software Foundation, Inc.
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 Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the 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 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <unistd.h>
19#include <include/sys/stat.h>
20#include <stdlib.h>
21#include <string.h>
22
23/* Return a malloc'd string containing the current directory name.
24 If the environment variable `PWD' is set, and its value is correct,
25 that value is used. */
26
27char *
28get_current_dir_name (void)
29{
30 char *pwd;
31 struct __stat64_t64 dotstat, pwdstat;
32
33 pwd = getenv ("PWD");
34 if (pwd != NULL
35 && __stat64_time64 (".", &dotstat) == 0
36 && __stat64_time64 (pwd, &pwdstat) == 0
37 && pwdstat.st_dev == dotstat.st_dev
38 && pwdstat.st_ino == dotstat.st_ino)
39 /* The PWD value is correct. Use it. */
40 return __strdup (pwd);
41
42 return __getcwd ((char *) NULL, 0);
43}
44

source code of glibc/io/getdirname.c