* [PATCH v3 1/2] selftests/fchmodat2: Clean up temporary files and directories
2025-10-15 12:36 [PATCH v3 0/2] selftests/fchmodat2: Error handling and general cleanups Mark Brown
@ 2025-10-15 12:36 ` Mark Brown
2025-10-15 12:36 ` [PATCH v3 2/2] selftests/fchmodat2: Use ksft_finished() Mark Brown
2025-10-15 13:41 ` [PATCH v3 0/2] selftests/fchmodat2: Error handling and general cleanups Alexey Gladkov
2 siblings, 0 replies; 4+ messages in thread
From: Mark Brown @ 2025-10-15 12:36 UTC (permalink / raw)
To: Shuah Khan, Alexey Gladkov, Christian Brauner
Cc: linux-kselftest, linux-kernel, Mark Brown
The fchmodat2() test program creates a temporary directory with a file and
a symlink for every test it runs but never cleans these up, resulting in
${TMPDIR} getting left with stale files after every run. Restructure the
program a bit to ensure that we clean these up, this is more invasive than
it might otherwise be due to the extensive use of ksft_exit_fail_msg() in
the program.
As a side effect this also ensures that we report a consistent test name
for the tests and always try both tests even if they are skipped.
Signed-off-by: Mark Brown <broonie@kernel.org>
---
tools/testing/selftests/fchmodat2/fchmodat2_test.c | 161 ++++++++++++++-------
1 file changed, 111 insertions(+), 50 deletions(-)
diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
index e0319417124d..e977d942c00b 100644
--- a/tools/testing/selftests/fchmodat2/fchmodat2_test.c
+++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c
@@ -9,6 +9,11 @@
#include "../kselftest.h"
+struct testdir {
+ char *dirname;
+ int dfd;
+};
+
int sys_fchmodat2(int dfd, const char *filename, mode_t mode, int flags)
{
int ret = syscall(__NR_fchmodat2, dfd, filename, mode, flags);
@@ -16,9 +21,9 @@ int sys_fchmodat2(int dfd, const char *filename, mode_t mode, int flags)
return ret >= 0 ? ret : -errno;
}
-int setup_testdir(void)
+static void setup_testdir(struct testdir *testdir)
{
- int dfd, ret;
+ int ret, dfd;
char dirname[] = "/tmp/ksft-fchmodat2.XXXXXX";
/* Make the top-level directory. */
@@ -26,21 +31,48 @@ int setup_testdir(void)
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__);
+ if (dfd < 0) {
+ ksft_perror("failed to open tmpdir");
+ goto err;
+ }
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__);
+ if (ret < 0) {
+ ksft_perror("failed to create file in tmpdir");
+ goto err;
+ }
close(ret);
ret = symlinkat("regfile", dfd, "symlink");
- if (ret < 0)
- ksft_exit_fail_msg("%s: failed to create symlink in tmpdir\n",
- __func__);
+ if (ret < 0) {
+ ksft_perror("symlinkat() failed");
+ goto err_regfile;
+ }
+
+ testdir->dirname = strdup(dirname);
+ if (!testdir->dirname) {
+ ksft_perror("Out of memory");
+ goto err_symlink;
+ }
+ testdir->dfd = dfd;
+
+ return;
+
+err_symlink:
+ unlinkat(testdir->dfd, "symlink", 0);
+err_regfile:
+ unlinkat(testdir->dfd, "regfile", 0);
+err:
+ unlink(dirname);
+ ksft_exit_fail();
+}
- return dfd;
+static void cleanup_testdir(struct testdir *testdir)
+{
+ unlinkat(testdir->dfd, "regfile", 0);
+ unlinkat(testdir->dfd, "symlink", 0);
+ rmdir(testdir->dirname);
+ free(testdir->dirname);
}
int expect_mode(int dfd, const char *filename, mode_t expect_mode)
@@ -48,61 +80,80 @@ 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);
+ if (ret) {
+ ksft_perror("fstatat() failed\n");
+ return 0;
+ }
return (st.st_mode == expect_mode);
}
void test_regfile(void)
{
- int dfd, ret;
-
- dfd = setup_testdir();
+ struct testdir testdir;
+ int ret;
- ret = sys_fchmodat2(dfd, "regfile", 0640, 0);
+ setup_testdir(&testdir);
- 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(testdir.dfd, "regfile", 0640, 0);
- ret = sys_fchmodat2(dfd, "regfile", 0600, AT_SYMLINK_NOFOLLOW);
+ if (ret < 0) {
+ ksft_perror("fchmodat2(noflag) failed");
+ goto out;
+ }
- if (ret < 0)
- ksft_exit_fail_msg("%s: fchmodat2(AT_SYMLINK_NOFOLLOW) failed\n",
+ if (!expect_mode(testdir.dfd, "regfile", 0100640)) {
+ ksft_print_msg("%s: wrong file mode bits after fchmodat2\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");
+ ret = 1;
+ goto out;
+ }
+
+ ret = sys_fchmodat2(testdir.dfd, "regfile", 0600, AT_SYMLINK_NOFOLLOW);
+
+ if (ret < 0) {
+ ksft_perror("fchmodat2(AT_SYMLINK_NOFOLLOW) failed");
+ goto out;
+ }
+
+ if (!expect_mode(testdir.dfd, "regfile", 0100600)) {
+ ksft_print_msg("%s: wrong file mode bits after fchmodat2 with nofollow\n",
+ __func__);
+ ret = 1;
+ }
+
+out:
+ ksft_test_result(ret == 0, "fchmodat2(regfile)\n");
+ cleanup_testdir(&testdir);
}
void test_symlink(void)
{
- int dfd, ret;
+ struct testdir testdir;
+ int ret;
- dfd = setup_testdir();
+ setup_testdir(&testdir);
- ret = sys_fchmodat2(dfd, "symlink", 0640, 0);
+ ret = sys_fchmodat2(testdir.dfd, "symlink", 0640, 0);
- if (ret < 0)
- ksft_exit_fail_msg("%s: fchmodat2(noflag) failed\n", __func__);
+ if (ret < 0) {
+ ksft_perror("fchmodat2(noflag) failed");
+ goto err;
+ }
- if (!expect_mode(dfd, "regfile", 0100640))
- ksft_exit_fail_msg("%s: wrong file mode bits after fchmodat2\n",
- __func__);
+ if (!expect_mode(testdir.dfd, "regfile", 0100640)) {
+ ksft_print_msg("%s: wrong file mode bits after fchmodat2\n",
+ __func__);
+ goto err;
+ }
- if (!expect_mode(dfd, "symlink", 0120777))
- ksft_exit_fail_msg("%s: wrong symlink mode bits after fchmodat2\n",
- __func__);
+ if (!expect_mode(testdir.dfd, "symlink", 0120777)) {
+ ksft_print_msg("%s: wrong symlink mode bits after fchmodat2\n",
+ __func__);
+ goto err;
+ }
- ret = sys_fchmodat2(dfd, "symlink", 0600, AT_SYMLINK_NOFOLLOW);
+ ret = sys_fchmodat2(testdir.dfd, "symlink", 0600, AT_SYMLINK_NOFOLLOW);
/*
* On certain filesystems (xfs or btrfs), chmod operation fails. So we
@@ -111,18 +162,28 @@ void test_symlink(void)
*
* 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",
+ if (ret == 0 && !expect_mode(testdir.dfd, "symlink", 0120600)) {
+ ksft_print_msg("%s: wrong symlink mode bits after fchmodat2 with nofollow\n",
__func__);
+ ret = 1;
+ goto err;
+ }
- if (!expect_mode(dfd, "regfile", 0100640))
- ksft_exit_fail_msg("%s: wrong file mode bits after fchmodat2 with nofollow\n",
- __func__);
+ if (!expect_mode(testdir.dfd, "regfile", 0100640)) {
+ ksft_print_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");
+ cleanup_testdir(&testdir);
+ return;
+
+err:
+ ksft_test_result_fail("fchmodat2(symlink)\n");
+ cleanup_testdir(&testdir);
}
#define NUM_TESTS 2
--
2.47.2
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