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test-xattr-util: add test cases for symlinks

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This commit is contained in:
Mike Yuan 2025-02-09 13:23:27 +01:00
parent b8df25dcfe
commit d228afd792
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1 changed files with 32 additions and 0 deletions
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32
src/test/test-xattr-util.c
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@ -7,6 +7,7 @@
#include <unistd.h>
#include "alloc-util.h"
#include "capability-util.h"
#include "fd-util.h"
#include "fs-util.h"
#include "macro.h"
@ -86,6 +87,20 @@ static void verify_xattr(int dfd, const char *expected) {
ASSERT_STREQ(value, expected);
}
static void xattr_symlink_test_one(int fd, const char *path) {
_cleanup_free_ char *value = NULL, *list = NULL;
ASSERT_OK(xsetxattr(fd, path, 0, "trusted.test", "schaffen"));
ASSERT_OK_EQ(getxattr_at_malloc(fd, path, "trusted.test", 0, &value), (int) STRLEN("schaffen"));
ASSERT_STREQ(value, "schaffen");
ASSERT_OK_EQ(listxattr_at_malloc(fd, path, 0, &list), (int) sizeof("trusted.test"));
ASSERT_STREQ(list, "trusted.test");
ASSERT_OK(xremovexattr(fd, path, 0, "trusted.test"));
ASSERT_ERROR(getxattr_at_malloc(fd, path, "trusted.test", 0, &value), ENODATA);
}
TEST(xsetxattr) {
_cleanup_(rm_rf_physical_and_freep) char *t = NULL;
_cleanup_close_ int dfd = -EBADF, fd = -EBADF;
@ -131,6 +146,23 @@ TEST(xsetxattr) {
ASSERT_OK(xsetxattr(fd, "", 0, "user.foo", "fd_regular_empty"));
verify_xattr(dfd, "fd_regular_empty");
fd = safe_close(fd);
/* user.* xattrs are not supported on symlinks. Use trusted.* which requires privilege. */
if (have_effective_cap(CAP_SYS_ADMIN) > 0) {
ASSERT_OK_ERRNO(symlinkat("empty", dfd, "symlink"));
ASSERT_OK_ERRNO(fd = openat(dfd, "symlink", O_NOFOLLOW|O_PATH|O_CLOEXEC));
ASSERT_ERROR(xsetxattr(dfd, "symlink", AT_SYMLINK_FOLLOW, "trusted.test", "bogus"), ENOENT);
xattr_symlink_test_one(dfd, "symlink");
xattr_symlink_test_one(fd, NULL);
xattr_symlink_test_one(fd, "");
x = strjoina(t, "/symlink");
xattr_symlink_test_one(AT_FDCWD, x);
}
}
DEFINE_TEST_MAIN(LOG_DEBUG);