Mercurial > hg > octave-lojdl > gnulib-hg
annotate tests/test-freopen-safer.c @ 15681:c21e706c88b2
Tests for module 'shutdown'.
* modules/shutdown-tests: New file.
* tests/test-shutdown.c: New file.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Tue, 20 Sep 2011 21:38:04 +0200 |
| parents | 97fc9a21a8fb |
| children | 8250f2777afc |
| rev | line source |
|---|---|
| 12246 | 1 /* Test of reopening a stream. |
|
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2 Copyright (C) 2009-2011 Free Software Foundation, Inc. |
| 12246 | 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 /* Specification. */ | |
| 22 #include "stdio--.h" | |
| 23 | |
| 24 /* Helpers. */ | |
| 25 #include <unistd.h> | |
| 26 | |
| 27 /* This test intentionally closes stderr. So, we arrange to have fd 10 | |
| 28 (outside the range of interesting fd's during the test) set up to | |
| 29 duplicate the original stderr. */ | |
| 30 | |
| 31 #define BACKUP_STDERR_FILENO 10 | |
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32 #define ASSERT_STREAM myerr |
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33 #include "macros.h" |
| 12246 | 34 |
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35 static FILE *myerr; |
| 12246 | 36 |
| 37 int | |
| 12481 | 38 main (void) |
| 12246 | 39 { |
| 40 FILE *fp; | |
| 41 | |
| 42 /* We close fd 2 later, so save it in fd 10. */ | |
| 43 if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO | |
| 44 || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL) | |
| 45 return 2; | |
| 46 | |
| 47 { | |
| 48 FILE *tmp; | |
| 49 ASSERT (tmp = fopen ("/dev/null", "r")); | |
| 50 ASSERT (STDERR_FILENO < fileno (tmp)); | |
| 51 ASSERT (fp = fopen ("/dev/null", "w")); | |
| 52 ASSERT (fileno (tmp) < fileno (fp)); | |
| 53 ASSERT (fclose (tmp) == 0); | |
| 54 } | |
| 55 | |
| 56 /* Gap in fds. */ | |
| 57 ASSERT (freopen ("/dev/null", "r+", fp) == fp); | |
| 58 ASSERT (STDERR_FILENO < fileno (fp)); | |
| 59 | |
| 60 ASSERT (freopen ("/dev/null", "r", stdin) == stdin); | |
| 61 ASSERT (STDIN_FILENO == fileno (stdin)); | |
| 62 | |
| 63 ASSERT (freopen ("/dev/null", "w", stdout) == stdout); | |
| 64 ASSERT (STDOUT_FILENO == fileno (stdout)); | |
| 65 | |
| 66 ASSERT (freopen ("/dev/null", "w", stderr) == stderr); | |
| 67 ASSERT (STDERR_FILENO == fileno (stderr)); | |
| 68 | |
| 69 /* fd 0 closed. */ | |
| 70 ASSERT (close (STDIN_FILENO) == 0); | |
| 71 | |
| 72 ASSERT (freopen ("/dev/null", "w", stdout) == stdout); | |
| 73 ASSERT (STDOUT_FILENO == fileno (stdout)); | |
| 74 | |
| 75 ASSERT (freopen ("/dev/null", "w", stderr) == stderr); | |
| 76 ASSERT (STDERR_FILENO == fileno (stderr)); | |
| 77 | |
| 78 ASSERT (freopen ("/dev/null", "a", fp) == fp); | |
| 79 ASSERT (STDERR_FILENO < fileno (fp)); | |
| 80 | |
| 81 /* fd 1 closed. */ | |
| 82 ASSERT (close (STDOUT_FILENO) == 0); | |
| 83 | |
| 84 ASSERT (freopen ("/dev/null", "w", stderr) == stderr); | |
| 85 ASSERT (STDERR_FILENO == fileno (stderr)); | |
| 86 | |
| 87 ASSERT (freopen ("/dev/null", "a+", fp) == fp); | |
| 88 ASSERT (STDERR_FILENO < fileno (fp)); | |
| 89 | |
| 90 /* fd 2 closed. */ | |
| 91 ASSERT (close (STDERR_FILENO) == 0); | |
| 92 | |
| 93 ASSERT (freopen ("/dev/null", "w+", fp) == fp); | |
| 94 ASSERT (STDERR_FILENO < fileno (fp)); | |
| 95 | |
| 96 return 0; | |
| 97 } |