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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:21:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:21:29 +0000
commit29cd838eab01ed7110f3ccb2e8c6a35c8a31dbcc (patch)
tree63ef546b10a81d461e5cf5ed9e98a68cd7dee1aa /src/grep/gnulib-tests/test-openat.c
parentInitial commit. (diff)
downloadkbuild-29cd838eab01ed7110f3ccb2e8c6a35c8a31dbcc.tar.xz
kbuild-29cd838eab01ed7110f3ccb2e8c6a35c8a31dbcc.zip
Adding upstream version 1:0.1.9998svn3589+dfsg.upstream/1%0.1.9998svn3589+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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diff --git a/src/grep/gnulib-tests/test-openat.c b/src/grep/gnulib-tests/test-openat.c
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+/* Test that openat works.
+ Copyright (C) 2009-2021 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 <https://www.gnu.org/licenses/>. */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009. */
+
+#include <config.h>
+
+#include <fcntl.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (openat, int, (int, char const *, int, ...));
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#define BASE "test-openat.t"
+
+#include "test-open.h"
+
+static int dfd = AT_FDCWD;
+
+/* Wrapper around openat to test open behavior. */
+static int
+do_open (char const *name, int flags, ...)
+{
+ if (flags & O_CREAT)
+ {
+ mode_t mode = 0;
+ va_list arg;
+ va_start (arg, flags);
+
+ /* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
+ creates crashing code when 'mode_t' is smaller than 'int'. */
+ mode = va_arg (arg, PROMOTED_MODE_T);
+
+ va_end (arg);
+ return openat (dfd, name, flags, mode);
+ }
+ return openat (dfd, name, flags);
+}
+
+int
+main (int argc _GL_UNUSED, char *argv[])
+{
+ int result;
+
+ /* Test behaviour for invalid file descriptors. */
+ {
+ errno = 0;
+ ASSERT (openat (-1, "foo", O_RDONLY) == -1);
+ ASSERT (errno == EBADF);
+ }
+ {
+ close (99);
+ errno = 0;
+ ASSERT (openat (99, "foo", O_RDONLY) == -1);
+ ASSERT (errno == EBADF);
+ }
+
+ /* Basic checks. */
+ result = test_open (do_open, false);
+ dfd = open (".", O_RDONLY);
+ ASSERT (0 <= dfd);
+ ASSERT (test_open (do_open, false) == result);
+ ASSERT (close (dfd) == 0);
+
+ /* Check that even when *-safer modules are in use, plain openat can
+ land in fd 0. Do this test last, since it is destructive to
+ stdin. */
+ ASSERT (close (STDIN_FILENO) == 0);
+ ASSERT (openat (AT_FDCWD, ".", O_RDONLY) == STDIN_FILENO);
+ {
+ dfd = open (".", O_RDONLY);
+ ASSERT (STDIN_FILENO < dfd);
+ ASSERT (chdir ("..") == 0);
+ ASSERT (close (STDIN_FILENO) == 0);
+ ASSERT (openat (dfd, ".", O_RDONLY) == STDIN_FILENO);
+ ASSERT (close (dfd) == 0);
+ }
+ return result;
+}