| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* Copyright (C) 1992, 1997, 1998, 2000 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, write to the Free |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 18 | 02111-1307 USA. */ |
| 19 | |
| 20 | #include <features.h> |
| 21 | |
| 22 | #ifdef __USE_GNU |
| 23 | #include <unistd.h> |
| 24 | #include <sys/stat.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | |
| 28 | /* Return a malloc'd string containing the current directory name. |
| 29 | If the environment variable `PWD' is set, and its value is correct, |
| 30 | that value is used. */ |
| 31 | |
| 32 | char * |
| 33 | get_current_dir_name (void) |
| 34 | { |
| 35 | char *pwd; |
| 36 | #ifdef __UCLIBC_HAS_LFS__ |
| 37 | struct stat64 dotstat, pwdstat; |
| 38 | #else |
| 39 | struct stat dotstat, pwdstat; |
| 40 | #endif |
| 41 | |
| 42 | pwd = getenv ("PWD"); |
| 43 | if (pwd != NULL |
| 44 | #ifdef __UCLIBC_HAS_LFS__ |
| 45 | && stat64 (".", &dotstat) == 0 |
| 46 | && stat64 (pwd, &pwdstat) == 0 |
| 47 | #else |
| 48 | && stat (".", &dotstat) == 0 |
| 49 | && stat (pwd, &pwdstat) == 0 |
| 50 | #endif |
| 51 | && pwdstat.st_dev == dotstat.st_dev |
| 52 | && pwdstat.st_ino == dotstat.st_ino) |
| 53 | /* The PWD value is correct. Use it. */ |
| 54 | return strdup (pwd); |
| 55 | |
| 56 | return getcwd ((char *) NULL, 0); |
| 57 | } |
| 58 | #endif |