From 7728c57488f3d75c6c2865ef36eae262daf8947a Mon Sep 17 00:00:00 2001 From: Siddhesh Poyarekar Date: Thu, 6 Dec 2012 11:10:18 +0530 Subject: Add newline to last test in stdio-common/tst-put-error.c The newline ensures that the buffer is flushed and the test executes as expected. --- stdio-common/tst-put-error.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'stdio-common') diff --git a/stdio-common/tst-put-error.c b/stdio-common/tst-put-error.c index 5209cce173..71c110324a 100644 --- a/stdio-common/tst-put-error.c +++ b/stdio-common/tst-put-error.c @@ -34,20 +34,30 @@ do_test (void) 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, "%10000000s", "foo"); + n = fprintf (fp, "%100s\n", "foo"); printf ("fprintf = %d\n", n); if (n >= 0) error (EXIT_FAILURE, 0, "padded fprintf succeeded"); -- cgit 1.4.1