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stdio-common: Add new test for fdopen
This commit adds fdopen test with all modes. Reviewed-by: DJ Delorie <dj@redhat.com>
This commit is contained in:
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commit
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@ -207,6 +207,7 @@ tests := \
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tst-cookie \
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tst-dprintf-length \
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tst-fdopen \
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tst-fdopen2 \
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tst-ferror \
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tst-fgets \
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tst-fgets2 \
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246
stdio-common/tst-fdopen2.c
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246
stdio-common/tst-fdopen2.c
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@ -0,0 +1,246 @@
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/* Test the fdopen function.
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/xunistd.h>
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#include <support/temp_file.h>
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char *tmp_dir;
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char *path_to_file;
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void
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prepare_tmp_dir (void)
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{
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tmp_dir = support_create_temp_directory ("tst-fdopen2");
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path_to_file = xasprintf ("%s/tst-fdopen2.txt", tmp_dir);
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}
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/* open temp file descriptor with mode. */
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int
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open_tmp_fd (int mode)
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{
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int fd = xopen (path_to_file, mode, 0644);
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return fd;
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}
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/* close and remove temp file with close. */
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void
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close_tmp_fd (int fd)
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{
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xclose (fd);
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xunlink (path_to_file);
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}
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/* close and remove temp file with fclose. */
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void
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close_tmp_fp (FILE *fp)
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{
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fclose (fp);
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xunlink (path_to_file);
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}
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/* test "w" fdopen mode. */
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void
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do_test_fdopen_w (void)
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{
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int fd, ret;
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FILE *fp;
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fd = open_tmp_fd (O_WRONLY | O_CREAT | O_TRUNC);
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/* test mode mismatch. */
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fp = fdopen (fd, "r");
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if (fp != NULL || errno != EINVAL)
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{
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close_tmp_fd (fd);
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FAIL_EXIT1 ("fdopen (%d, r) should fail with EINVAL: %m", fd);
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}
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fp = fdopen (fd, "w");
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if (fp == NULL)
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{
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close_tmp_fd (fd);
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FAIL_EXIT1 ("fdopen (%d, w): %m", fd);
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}
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const void *buf = "AAAA";
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ret = fwrite (buf, 1, 4, fp);
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if (ret != 4)
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{
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close_tmp_fp (fp);
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FAIL_EXIT1 ("fwrite (): %m");
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}
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unsigned char buf2[4];
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rewind (fp);
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clearerr (fp);
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/* fread should fail in "w" mode */
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ret = fread (buf2, 1, 4, fp);
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if (ret != 0 || ferror (fp) == 0)
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{
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close_tmp_fp (fp);
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FAIL_EXIT1 ("fread should fail in \"w\" mode");
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}
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fclose (fp);
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}
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/* test "r" fdopen mode. */
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void
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do_test_fdopen_r (void)
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{
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int fd, ret;
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FILE *fp;
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fd = open_tmp_fd (O_RDONLY);
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/* test mode mismatch. */
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fp = fdopen (fd, "w");
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if (fp != NULL || errno != EINVAL)
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{
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close_tmp_fd (fd);
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FAIL_EXIT1 ("fdopen (%d, w) should fail with EINVAL: %m", fd);
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}
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fp = fdopen (fd, "r");
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if (fp == NULL)
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{
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close_tmp_fd (fd);
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FAIL_EXIT1 ("fdopen (%d, w): %m", fd);
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}
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const void *buf = "BBBB";
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/* fwrite should fail in "r" mode. */
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ret = fwrite (buf, 1, 4, fp);
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if (ret != 0 || ferror (fp) == 0)
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{
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close_tmp_fp (fp);
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FAIL_EXIT1 ("fwrite should fail in \"r\" mode");
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}
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unsigned char buf2[4];
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ret = fread (buf2, 1, 4, fp);
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if (ret != 4)
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{
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close_tmp_fp (fp);
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FAIL_EXIT1 ("fread (): %m");
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}
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fclose (fp);
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}
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/* test "a" fdopen mode. */
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void
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do_test_fdopen_a (void)
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{
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int fd, ret;
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FILE *fp;
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fd = open_tmp_fd (O_WRONLY | O_CREAT | O_APPEND);
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/* test mode mismatch. */
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fp = fdopen (fd, "r+");
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if (fp != NULL || errno != EINVAL)
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{
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close_tmp_fd (fd);
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FAIL_EXIT1 ("fdopen (%d, \"r+\") should fail with EINVAL: %m", fd);
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}
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fp = fdopen (fd, "a");
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if (fp == NULL)
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{
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close_tmp_fd (fd);
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FAIL_EXIT1 ("fdopen (%d, w): %m", fd);
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}
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const void *buf = "CCCC";
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ret = fwrite (buf, 1, 4, fp);
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if (ret != 4)
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{
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close_tmp_fp (fp);
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FAIL_EXIT1 ("fwrite (): %m");
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}
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/* fread should fail in "a" mode. */
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unsigned char buf2[4];
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clearerr (fp);
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ret = fread (buf2, 1, 4, fp);
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if (ret != 0 || ferror (fp) == 0)
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{
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close_tmp_fp (fp);
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FAIL_EXIT1 ("fread should fail \"a\" mode");
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}
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fclose (fp);
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}
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void
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do_test_fdopen_mode (int mode, const char *fmode)
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{
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int fd, ret;
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FILE *fp;
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fd = open_tmp_fd (mode);
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fp = fdopen (fd, fmode);
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if (fp == NULL)
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{
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close_tmp_fd (fd);
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FAIL_EXIT1 ("fdopen (%d, %s): %m", fd, fmode);
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}
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const void *buf = "EEEE";
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ret = fwrite (buf, 1, 4, fp);
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if (ret != 4)
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{
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close_tmp_fp (fp);
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FAIL_EXIT1 ("fwrite () in mode:%s returns %d: %m", fmode, ret);
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}
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rewind (fp);
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unsigned char buf2[4];
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ret = fread (buf2, 1, 4, fp);
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if (ret != 4)
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{
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close_tmp_fp (fp);
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FAIL_EXIT1 ("fread () in mode:%s returns %d: %m", fmode, ret);
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}
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fclose (fp);
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}
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static int
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do_test (void)
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{
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prepare_tmp_dir ();
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do_test_fdopen_w ();
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do_test_fdopen_r ();
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do_test_fdopen_a ();
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/* test r+ w+ a+ fdopen modes. */
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do_test_fdopen_mode (O_RDWR, "r+");
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do_test_fdopen_mode (O_RDWR | O_CREAT | O_TRUNC, "w+");
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do_test_fdopen_mode (O_RDWR | O_CREAT | O_APPEND, "a+");
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xunlink (path_to_file);
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return 0;
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}
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#include <support/test-driver.c>
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