diff options
Diffstat (limited to 'REORG.TODO/stdio-common/tst-put-error.c')
-rw-r--r-- | REORG.TODO/stdio-common/tst-put-error.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/REORG.TODO/stdio-common/tst-put-error.c b/REORG.TODO/stdio-common/tst-put-error.c new file mode 100644 index 0000000000..4f91fb7471 --- /dev/null +++ b/REORG.TODO/stdio-common/tst-put-error.c @@ -0,0 +1,69 @@ +/* Verify that print functions return error when there is an I/O error. + + Copyright (C) 2005-2017 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 <errno.h> +#include <error.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + + +static int +do_test (void) +{ + char tmpl[] = "/tmp/tst-put-error.XXXXXX"; + int fd = mkstemp (tmpl); + if (fd == -1) + error (EXIT_FAILURE, errno, "cannot create temporary file"); + FILE *fp = fdopen (fd, "w"); + if (fp == NULL) + error (EXIT_FAILURE, errno, "fdopen"); + + /* All of the tests below verify that flushing buffers result in failure of + the fprintf calls. We ensure that the buffer is flushed at the end of + each fprintf call by doing two things - setting the file pointer to + line-buffered so that it is flushed whenever it encounters a newline and + then ensuring that there is a newline in each of the format strings we + pass to fprintf. */ + + setlinebuf (fp); + close (fd); + unlink (tmpl); + + int n = fprintf (fp, "hello world\n"); + printf ("fprintf = %d\n", n); + if (n >= 0) + error (EXIT_FAILURE, 0, "first fprintf succeeded"); + + n = fprintf (fp, "hello world\n"); + printf ("fprintf = %d\n", n); + if (n >= 0) + error (EXIT_FAILURE, 0, "second fprintf succeeded"); + + /* Padded printing takes a different code path. */ + n = fprintf (fp, "%100s\n", "foo"); + printf ("fprintf = %d\n", n); + if (n >= 0) + error (EXIT_FAILURE, 0, "padded fprintf succeeded"); + + return 0; +} + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" |