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Diffstat (limited to 'stdio-common/tst-fmemopen4.c')
-rw-r--r-- | stdio-common/tst-fmemopen4.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/stdio-common/tst-fmemopen4.c b/stdio-common/tst-fmemopen4.c new file mode 100644 index 0000000000..e24f1cacd9 --- /dev/null +++ b/stdio-common/tst-fmemopen4.c @@ -0,0 +1,71 @@ +/* fmemopen tests for BZ#1930 and BZ#20005. + Copyright (C) 2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <assert.h> +#include <stdio.h> +#include <string.h> +#include <sys/types.h> + + +/* Check if fflush does not reset the file position. */ +static int +do_test (void) +{ + char buffer[500] = "x"; + + FILE *stream = fmemopen (buffer, sizeof (buffer), "r+"); + if (stream == NULL) + { + printf ("error: fmemopen could not open stream\n"); + return 1; + } + + const char test[] = "test"; + + size_t r = fwrite (test, sizeof (char), sizeof (test), stream); + if (r != sizeof (test)) + { + printf ("error: fwrite returned %zu, expected %zu\n", r, sizeof(test)); + return 1; + } + + r = ftell (stream); + if (r != sizeof (test)) + { + printf ("error: ftell return %zu, expected %zu\n", r, sizeof(test)); + return 1; + } + + if (fflush (stream) != 0) + { + printf ("error: fflush failed\n"); + return 1; + } + + r = ftell (stream); + if (r != sizeof (test)) + { + printf ("error: ftell return %zu, expected %zu\n", r, sizeof(test)); + return 1; + } + + return 0; +} + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" |