98 lines
3.4 KiB
C
98 lines
3.4 KiB
C
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/* Copyright 2021 Google LLC
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "test_skel.h"
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int main(int argc, char *argv[]) {
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int exit_status = 0;
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// Get two unique paths to play with.
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char foo[] = "tempfile.XXXXXX";
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char bar[] = "tempfile.XXXXXX";
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int fd_foo = mkstemp(foo);
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int fd_bar = mkstemp(bar);
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assert(fd_foo != -1);
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assert(fd_bar != -1);
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// Then delete foo.
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assert(sys_unlink(foo) == 0);
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// Now make foo a symlink to bar.
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assert(symlink(bar, foo) == 0);
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// Make sure sys_stat() and sys_lstat() implementation return different
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// information.
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// We need to check our stat syscalls for EOVERFLOW, as sometimes the integer
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// types used in the stat structures are too small to fit the actual value.
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// E.g. on some systems st_ino is 32-bit, but some filesystems have 64-bit
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// inodes.
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struct kernel_stat lstat_info;
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int rc = sys_lstat(foo, &lstat_info);
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if (rc < 0 && errno == EOVERFLOW) {
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// Bail out since we had an overflow in the stat structure.
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exit_status = SKIP_TEST_EXIT_STATUS;
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goto cleanup;
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}
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assert(rc == 0);
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struct kernel_stat stat_info;
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rc = sys_stat(foo, &stat_info);
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if (rc < 0 && errno == EOVERFLOW) {
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// Bail out since we had an overflow in the stat structure.
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exit_status = SKIP_TEST_EXIT_STATUS;
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goto cleanup;
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}
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assert(rc == 0);
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struct kernel_stat bar_stat_info;
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rc = sys_stat(bar, &bar_stat_info);
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if (rc < 0 && errno == EOVERFLOW) {
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// Bail out since we had an overflow in the stat structure.
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exit_status = SKIP_TEST_EXIT_STATUS;
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goto cleanup;
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}
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assert(rc == 0);
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// lstat should produce information about a symlink.
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assert((lstat_info.st_mode & S_IFMT) == S_IFLNK);
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// stat-ing foo and bar should produce the same inode.
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assert(stat_info.st_ino == bar_stat_info.st_ino);
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// lstat-ing foo should give a different inode than stat-ing foo.
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assert(stat_info.st_ino != lstat_info.st_ino);
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cleanup:
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sys_unlink(foo);
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sys_unlink(bar);
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return exit_status;
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}
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