| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 2005-2015 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 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <dirent.h> |
| 19 | #include <errno.h> |
| 20 | #include <fcntl.h> |
| 21 | #include <stddef.h> |
| 22 | #include <sys/stat.h> |
| 23 | |
| 24 | #include <not-cancel.h> |
| 25 | |
| 26 | |
| 27 | DIR * |
| 28 | __fdopendir (int fd) |
| 29 | { |
| 30 | struct stat64 statbuf; |
| 31 | |
| 32 | if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &statbuf), 0) < 0) |
| 33 | return NULL; |
| 34 | if (__glibc_unlikely (! S_ISDIR (statbuf.st_mode))) |
| 35 | { |
| 36 | __set_errno (ENOTDIR); |
| 37 | return NULL; |
| 38 | } |
| 39 | |
| 40 | /* Make sure the descriptor allows for reading. */ |
| 41 | int flags = __fcntl (fd, F_GETFL); |
| 42 | if (__glibc_unlikely (flags == -1)) |
| 43 | return NULL; |
| 44 | if (__glibc_unlikely ((flags & O_ACCMODE) == O_WRONLY)) |
| 45 | { |
| 46 | __set_errno (EINVAL); |
| 47 | return NULL; |
| 48 | } |
| 49 | |
| 50 | return __alloc_dir (fd, false, flags, &statbuf); |
| 51 | } |
| 52 | weak_alias (__fdopendir, fdopendir) |