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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
commit | 70e9163c9c18e995515598085cb824e554eb7ae7 (patch) | |
tree | a42dc8b2a6c031354bf31472de888bfc8a060132 /gnulib-tests/test-freopen.c | |
parent | cbf5993c43f49281173f185863577d86bfac6eae (diff) | |
download | coreutils-tarball-70e9163c9c18e995515598085cb824e554eb7ae7.tar.gz |
coreutils-8.25HEADcoreutils-8.25master
Diffstat (limited to 'gnulib-tests/test-freopen.c')
-rw-r--r-- | gnulib-tests/test-freopen.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/gnulib-tests/test-freopen.c b/gnulib-tests/test-freopen.c new file mode 100644 index 0000000..80453bf --- /dev/null +++ b/gnulib-tests/test-freopen.c @@ -0,0 +1,82 @@ +/* Test of opening a file stream. + Copyright (C) 2007-2016 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* Written by Bruno Haible <bruno@clisp.org>, 2007. */ + +#include <config.h> + +#include <stdio.h> + +#include "signature.h" +SIGNATURE_CHECK (freopen, FILE *, (char const *, char const *, FILE *)); + +#include <errno.h> +#include <unistd.h> + +#include "macros.h" + +int +main () +{ + const char *filename = "test-freopen.txt"; + + ASSERT (freopen ("/dev/null", "r", stdin) != NULL); + +#if 0 /* freopen (NULL, ...) is unsupported on most platforms. */ + /* Test that freopen() sets errno if someone else closes the stream + fd behind the back of stdio. */ + { + FILE *fp = fopen (filename, "w+"); + ASSERT (fp != NULL); + ASSERT (close (fileno (fp)) == 0); + errno = 0; + ASSERT (freopen (NULL, "r", fp) == NULL); + perror("freopen"); + ASSERT (errno == EBADF); + fclose (fp); + } + + /* Test that freopen() sets errno if the stream was constructed with + an invalid file descriptor. */ + { + FILE *fp = fdopen (-1, "w+"); + if (fp != NULL) + { + errno = 0; + ASSERT (freopen (NULL, "r", fp) == NULL); + ASSERT (errno == EBADF); + fclose (fp); + } + } + { + FILE *fp; + close (99); + fp = fdopen (99, "w+"); + if (fp != NULL) + { + errno = 0; + ASSERT (freopen (NULL, "r", fp) == NULL); + ASSERT (errno == EBADF); + fclose (fp); + } + } +#endif + + /* Clean up. */ + unlink (filename); + + return 0; +} |