Mercurial > hg > octave-kai > gnulib-hg
annotate tests/test-dirent-safer.c @ 17415:6550127da196
argp: typo fix
* lib/argp-help.c: Typo in comment.
| author | Alexandre Duret-Lutz <adl@lrde.epita.fr> |
|---|---|
| date | Fri, 17 May 2013 19:01:14 +0200 |
| parents | e542fd46ad6f |
| children |
| rev | line source |
|---|---|
| 11936 | 1 /* Test that directory streams leave standard fds alone. |
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2 Copyright (C) 2009-2013 Free Software Foundation, Inc. |
| 11936 | 3 |
| 4 This program is free software: you can redistribute it and/or modify | |
| 5 it under the terms of the GNU General Public License as published by | |
| 6 the Free Software Foundation; either version 3 of the License, or | |
| 7 (at your option) any later version. | |
| 8 | |
| 9 This program 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 | |
| 12 GNU General Public License for more details. | |
| 13 | |
| 14 You should have received a copy of the GNU General Public License | |
| 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 16 | |
| 17 /* Written by Eric Blake <ebb9@byu.net>, 2009. */ | |
| 18 | |
| 19 #include <config.h> | |
| 20 | |
| 21 #include "dirent--.h" | |
| 22 | |
| 23 #include <errno.h> | |
| 24 #include <fcntl.h> | |
| 25 #include <stdio.h> | |
| 26 #include <unistd.h> | |
| 27 | |
| 28 #include "unistd-safer.h" | |
| 29 | |
| 30 /* This test intentionally closes stderr. So, we arrange to have fd 10 | |
| 31 (outside the range of interesting fd's during the test) set up to | |
| 32 duplicate the original stderr. */ | |
| 33 | |
| 34 #define BACKUP_STDERR_FILENO 10 | |
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35 #define ASSERT_STREAM myerr |
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36 #include "macros.h" |
| 11936 | 37 |
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38 static FILE *myerr; |
| 11936 | 39 |
| 40 int | |
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41 main (void) |
| 11936 | 42 { |
| 43 int i; | |
| 44 DIR *dp; | |
| 45 /* The dirent-safer module works without the use of fdopendir (which | |
| 46 would also pull in fchdir and openat); but if those modules were | |
| 47 also used, we ensure that they are safe. In particular, the | |
| 48 gnulib version of fdopendir is unable to guarantee that | |
| 49 dirfd(fdopendir(fd))==fd, but we can at least guarantee that if | |
| 50 they are not equal, the fd returned by dirfd is safe. */ | |
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51 #if HAVE_FDOPENDIR || GNULIB_TEST_FDOPENDIR |
| 11936 | 52 int dfd; |
| 53 #endif | |
| 54 | |
| 55 /* We close fd 2 later, so save it in fd 10. */ | |
| 56 if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO | |
| 57 || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL) | |
| 58 return 2; | |
| 59 | |
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60 #if HAVE_FDOPENDIR || GNULIB_TEST_FDOPENDIR |
| 11936 | 61 dfd = open (".", O_RDONLY); |
| 62 ASSERT (STDERR_FILENO < dfd); | |
| 63 #endif | |
| 64 | |
| 65 /* Four iterations, with progressively more standard descriptors | |
| 66 closed. */ | |
| 67 for (i = -1; i <= STDERR_FILENO; i++) | |
| 68 { | |
| 69 if (0 <= i) | |
| 70 ASSERT (close (i) == 0); | |
| 71 dp = opendir ("."); | |
| 72 ASSERT (dp); | |
| 73 ASSERT (dirfd (dp) == -1 || STDERR_FILENO < dirfd (dp)); | |
| 74 ASSERT (closedir (dp) == 0); | |
| 75 | |
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76 #if HAVE_FDOPENDIR || GNULIB_TEST_FDOPENDIR |
| 11936 | 77 { |
| 78 int fd = dup_safer (dfd); | |
| 79 ASSERT (STDERR_FILENO < fd); | |
| 80 dp = fdopendir (fd); | |
| 81 ASSERT (dp); | |
| 82 ASSERT (dirfd (dp) == -1 || STDERR_FILENO < dirfd (dp)); | |
| 83 ASSERT (closedir (dp) == 0); | |
| 84 errno = 0; | |
| 85 ASSERT (close (fd) == -1); | |
| 86 ASSERT (errno == EBADF); | |
| 87 } | |
| 88 #endif | |
| 89 } | |
| 90 | |
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91 #if HAVE_FDOPENDIR || GNULIB_TEST_FDOPENDIR |
| 11936 | 92 ASSERT (close (dfd) == 0); |
| 93 #endif | |
| 94 | |
| 95 return 0; | |
| 96 } |