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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /tools/testing/selftests/fchmodat2/fchmodat2_test.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/fchmodat2/fchmodat2_test.c')
-rw-r--r--tools/testing/selftests/fchmodat2/fchmodat2_test.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
new file mode 100644
index 0000000000..e031941712
--- /dev/null
+++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#define _GNU_SOURCE
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <syscall.h>
+#include <unistd.h>
+
+#include "../kselftest.h"
+
+int sys_fchmodat2(int dfd, const char *filename, mode_t mode, int flags)
+{
+ int ret = syscall(__NR_fchmodat2, dfd, filename, mode, flags);
+
+ return ret >= 0 ? ret : -errno;
+}
+
+int setup_testdir(void)
+{
+ int dfd, ret;
+ char dirname[] = "/tmp/ksft-fchmodat2.XXXXXX";
+
+ /* Make the top-level directory. */
+ if (!mkdtemp(dirname))
+ ksft_exit_fail_msg("%s: failed to create tmpdir\n", __func__);
+
+ dfd = open(dirname, O_PATH | O_DIRECTORY);
+ if (dfd < 0)
+ ksft_exit_fail_msg("%s: failed to open tmpdir\n", __func__);
+
+ ret = openat(dfd, "regfile", O_CREAT | O_WRONLY | O_TRUNC, 0644);
+ if (ret < 0)
+ ksft_exit_fail_msg("%s: failed to create file in tmpdir\n",
+ __func__);
+ close(ret);
+
+ ret = symlinkat("regfile", dfd, "symlink");
+ if (ret < 0)
+ ksft_exit_fail_msg("%s: failed to create symlink in tmpdir\n",
+ __func__);
+
+ return dfd;
+}
+
+int expect_mode(int dfd, const char *filename, mode_t expect_mode)
+{
+ struct stat st;
+ int ret = fstatat(dfd, filename, &st, AT_SYMLINK_NOFOLLOW);
+
+ if (ret)
+ ksft_exit_fail_msg("%s: %s: fstatat failed\n",
+ __func__, filename);
+
+ return (st.st_mode == expect_mode);
+}
+
+void test_regfile(void)
+{
+ int dfd, ret;
+
+ dfd = setup_testdir();
+
+ ret = sys_fchmodat2(dfd, "regfile", 0640, 0);
+
+ if (ret < 0)
+ ksft_exit_fail_msg("%s: fchmodat2(noflag) failed\n", __func__);
+
+ if (!expect_mode(dfd, "regfile", 0100640))
+ ksft_exit_fail_msg("%s: wrong file mode bits after fchmodat2\n",
+ __func__);
+
+ ret = sys_fchmodat2(dfd, "regfile", 0600, AT_SYMLINK_NOFOLLOW);
+
+ if (ret < 0)
+ ksft_exit_fail_msg("%s: fchmodat2(AT_SYMLINK_NOFOLLOW) failed\n",
+ __func__);
+
+ if (!expect_mode(dfd, "regfile", 0100600))
+ ksft_exit_fail_msg("%s: wrong file mode bits after fchmodat2 with nofollow\n",
+ __func__);
+
+ ksft_test_result_pass("fchmodat2(regfile)\n");
+}
+
+void test_symlink(void)
+{
+ int dfd, ret;
+
+ dfd = setup_testdir();
+
+ ret = sys_fchmodat2(dfd, "symlink", 0640, 0);
+
+ if (ret < 0)
+ ksft_exit_fail_msg("%s: fchmodat2(noflag) failed\n", __func__);
+
+ if (!expect_mode(dfd, "regfile", 0100640))
+ ksft_exit_fail_msg("%s: wrong file mode bits after fchmodat2\n",
+ __func__);
+
+ if (!expect_mode(dfd, "symlink", 0120777))
+ ksft_exit_fail_msg("%s: wrong symlink mode bits after fchmodat2\n",
+ __func__);
+
+ ret = sys_fchmodat2(dfd, "symlink", 0600, AT_SYMLINK_NOFOLLOW);
+
+ /*
+ * On certain filesystems (xfs or btrfs), chmod operation fails. So we
+ * first check the symlink target but if the operation fails we mark the
+ * test as skipped.
+ *
+ * https://sourceware.org/legacy-ml/libc-alpha/2020-02/msg00467.html
+ */
+ if (ret == 0 && !expect_mode(dfd, "symlink", 0120600))
+ ksft_exit_fail_msg("%s: wrong symlink mode bits after fchmodat2 with nofollow\n",
+ __func__);
+
+ if (!expect_mode(dfd, "regfile", 0100640))
+ ksft_exit_fail_msg("%s: wrong file mode bits after fchmodat2 with nofollow\n",
+ __func__);
+
+ if (ret != 0)
+ ksft_test_result_skip("fchmodat2(symlink)\n");
+ else
+ ksft_test_result_pass("fchmodat2(symlink)\n");
+}
+
+#define NUM_TESTS 2
+
+int main(int argc, char **argv)
+{
+ ksft_print_header();
+ ksft_set_plan(NUM_TESTS);
+
+ test_regfile();
+ test_symlink();
+
+ if (ksft_get_fail_cnt() + ksft_get_error_cnt() > 0)
+ ksft_exit_fail();
+ else
+ ksft_exit_pass();
+}