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authorDan Willemsen <dwillemsen@google.com>2019-02-18 13:40:03 -0800
committerDan Willemsen <dwillemsen@google.com>2019-02-18 13:40:03 -0800
commitea2b8a1c079d9184f53277f95a4d52c3c5a9f019 (patch)
tree5ec9aa82542909ecfc0859277d941528857a59b7 /tests/test-ftello4.c
parentcfddd4f332465a447e87b4c1523fb2b9133e7afd (diff)
downloadm4-ea2b8a1c079d9184f53277f95a4d52c3c5a9f019.tar.gz
Add 1.4.18 tarball contentsupstream
Test: none Change-Id: Id75707b7a41aaaaf33046cf541bcb19ecb4d5851
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+/* Test of ftello() function.
+ Copyright (C) 2011-2016 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+ const char *filename = argv[1];
+
+ /* Test that ftello() sets errno if someone else closes the stream
+ fd behind the back of stdio. */
+ {
+ FILE *fp = fopen (filename, "r");
+ ASSERT (fp != NULL);
+ setvbuf (fp, NULL, _IONBF, 0);
+ ASSERT (close (fileno (fp)) == 0);
+ errno = 0;
+ ASSERT (ftello (fp) == (off_t)-1);
+ ASSERT (errno == EBADF);
+ fclose (fp);
+ }
+
+ /* Test that ftello() sets errno if the stream was constructed with
+ an invalid file descriptor. */
+ {
+ FILE *fp = fdopen (-1, "w");
+ if (fp != NULL)
+ {
+ errno = 0;
+ ASSERT (ftello (fp) == (off_t)-1);
+ ASSERT (errno == EBADF);
+ fclose (fp);
+ }
+ }
+ {
+ FILE *fp;
+ close (99);
+ fp = fdopen (99, "w");
+ if (fp != NULL)
+ {
+ errno = 0;
+ ASSERT (ftello (fp) == (off_t)-1);
+ ASSERT (errno == EBADF);
+ fclose (fp);
+ }
+ }
+
+ return 0;
+}