/* fmemopen tests for BZ#1930 and BZ#20005. Copyright (C) 2016-2018 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"