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-rw-r--r--libio/tst-memstream4.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/libio/tst-memstream4.c b/libio/tst-memstream4.c
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+/* Test for open_memstream BZ #21037.
+ Copyright (C) 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 "tst-memstream.h"
+
+static void
+mcheck_abort (enum mcheck_status ev)
+{
+ printf ("mecheck failed with status %d\n", (int) ev);
+ exit (1);
+}
+
+static int
+do_test (void)
+{
+ mcheck_pedantic (mcheck_abort);
+
+ /* Check if freopen proper fflush the stream. */
+ {
+ CHAR_T old[] = W("old");
+ CHAR_T *buf = old;
+ size_t size;
+
+ FILE *fp = OPEN_MEMSTREAM (&buf, &size);
+ TEST_VERIFY_EXIT (fp != NULL);
+
+ FPUTS (W("new"), fp);
+ /* The stream buffer pointer should be updated with only a fflush or
+ fclose. */
+ TEST_COMPARE (STRCMP (buf, old), 0);
+
+ /* The old stream should be fflush the stream, even for an invalid
+ streams. */
+ FILE *nfp = freopen ("invalid-file", "r", fp);
+ TEST_VERIFY_EXIT (nfp == NULL);
+
+ TEST_VERIFY (STRCMP (buf, W("new")) == 0);
+ TEST_COMPARE_BLOB (buf, STRLEN (buf) * sizeof (CHAR_T),
+ W("new"), STRLEN (W("new")) * sizeof (CHAR_T));
+
+ TEST_COMPARE (fclose (fp), 0);
+
+ free (buf);
+ }
+
+ return 0;
+}
+
+#include <support/test-driver.c>