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-rw-r--r--tests/test-open.h133
1 files changed, 133 insertions, 0 deletions
diff --git a/tests/test-open.h b/tests/test-open.h
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+++ b/tests/test-open.h
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+/* Test of opening a file descriptor.
+ Copyright (C) 2007-2022 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 Bruno Haible <bruno@clisp.org>, 2007. */
+
+/* Make test_open always inline if we're using Fortify, which defines
+ __always_inline to do that. Do nothing otherwise. This works
+ around a glibc bug whereby 'open' cannot be used as a function
+ pointer when _FORTIFY_SOURCE is positive. */
+
+#if __GLIBC__ && defined __always_inline
+# define ALWAYS_INLINE __always_inline
+#else
+# define ALWAYS_INLINE
+#endif
+
+/* This file is designed to test both open(n,buf[,mode]) and
+ openat(AT_FDCWD,n,buf[,mode]). FUNC is the function to test.
+ Assumes that BASE and ASSERT are already defined, and that
+ appropriate headers are already included. If PRINT, warn before
+ skipping symlink tests with status 77. */
+
+static ALWAYS_INLINE int
+test_open (int (*func) (char const *, int, ...), bool print)
+{
+ int fd;
+
+ /* Remove anything from prior partial run. */
+ unlink (BASE "file");
+ unlink (BASE "e.exe");
+ unlink (BASE "link");
+
+ /* Cannot create directory. */
+ errno = 0;
+ ASSERT (func ("nonexist.ent/", O_CREAT | O_RDONLY, 0600) == -1);
+ ASSERT (errno == ENOTDIR || errno == EISDIR || errno == ENOENT
+ || errno == EINVAL);
+
+ /* Create a regular file. */
+ fd = func (BASE "file", O_CREAT | O_RDONLY, 0600);
+ ASSERT (0 <= fd);
+ ASSERT (close (fd) == 0);
+
+ /* Create an executable regular file. */
+ fd = func (BASE "e.exe", O_CREAT | O_RDONLY, 0700);
+ ASSERT (0 <= fd);
+ ASSERT (close (fd) == 0);
+
+ /* Trailing slash handling. */
+ errno = 0;
+ ASSERT (func (BASE "file/", O_RDONLY) == -1);
+ ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL);
+
+ /* Directories cannot be opened for writing. */
+ errno = 0;
+ ASSERT (func (".", O_WRONLY) == -1);
+ ASSERT (errno == EISDIR || errno == EACCES);
+
+ /* /dev/null must exist, and be writable. */
+ fd = func ("/dev/null", O_RDONLY);
+ ASSERT (0 <= fd);
+ {
+ char c;
+ ASSERT (read (fd, &c, 1) == 0);
+ }
+ ASSERT (close (fd) == 0);
+ fd = func ("/dev/null", O_WRONLY);
+ ASSERT (0 <= fd);
+ ASSERT (write (fd, "c", 1) == 1);
+ ASSERT (close (fd) == 0);
+
+ /* Although O_NONBLOCK on regular files can be ignored, it must not
+ cause a failure. */
+ fd = func (BASE "file", O_NONBLOCK | O_RDONLY);
+ ASSERT (0 <= fd);
+ ASSERT (close (fd) == 0);
+
+ /* O_CLOEXEC must be honoured. */
+ if (O_CLOEXEC)
+ {
+ /* Since the O_CLOEXEC handling goes through a special code path at its
+ first invocation, test it twice. */
+ int i;
+
+ for (i = 0; i < 2; i++)
+ {
+ int flags;
+
+ fd = func (BASE "file", O_CLOEXEC | O_RDONLY);
+ ASSERT (0 <= fd);
+ flags = fcntl (fd, F_GETFD);
+ ASSERT (flags >= 0);
+ ASSERT ((flags & FD_CLOEXEC) != 0);
+ ASSERT (close (fd) == 0);
+ }
+ }
+
+ /* Symlink handling, where supported. */
+ if (symlink (BASE "file", BASE "link") != 0)
+ {
+ ASSERT (unlink (BASE "file") == 0);
+ if (print)
+ fputs ("skipping test: symlinks not supported on this file system\n",
+ stderr);
+ return 77;
+ }
+ errno = 0;
+ ASSERT (func (BASE "link/", O_RDONLY) == -1);
+ ASSERT (errno == ENOTDIR);
+ fd = func (BASE "link", O_RDONLY);
+ ASSERT (0 <= fd);
+ ASSERT (close (fd) == 0);
+
+ /* Cleanup. */
+ ASSERT (unlink (BASE "file") == 0);
+ ASSERT (unlink (BASE "e.exe") == 0);
+ ASSERT (unlink (BASE "link") == 0);
+
+ return 0;
+}