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-rw-r--r--gnulib-tests/test-lchown.h260
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diff --git a/gnulib-tests/test-lchown.h b/gnulib-tests/test-lchown.h
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+++ b/gnulib-tests/test-lchown.h
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+/* Tests of lchown.
+ Copyright (C) 2009-2022 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 Eric Blake <ebb9@byu.net>, 2009. */
+
+#include "nap.h"
+
+#if !HAVE_GETEGID
+# define getegid() ((gid_t) -1)
+#endif
+
+#ifndef HAVE_LCHMOD
+# define HAVE_LCHMOD 0
+#endif
+
+#ifndef CHOWN_CHANGE_TIME_BUG
+# define CHOWN_CHANGE_TIME_BUG 0
+#endif
+
+/* This file is designed to test lchown(n,o,g) and
+ chownat(AT_FDCWD,n,o,g,AT_SYMLINK_NOFOLLOW). 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 int
+test_lchown (int (*func) (char const *, uid_t, gid_t), bool print)
+{
+ struct stat st1;
+ struct stat st2;
+ gid_t *gids = NULL;
+ int gids_count;
+ int result;
+
+ /* Solaris 8 is interesting - if the current process belongs to
+ multiple groups, the current directory is owned by a group that
+ the current process belongs to but different than getegid(), and
+ the current directory does not have the S_ISGID bit, then regular
+ files created in the directory belong to the directory's group,
+ but symlinks belong to the current effective group id. If
+ S_ISGID is set, then both files and symlinks belong to the
+ directory's group. However, it is possible to run the testsuite
+ from within a directory owned by a group we don't belong to, in
+ which case all things that we create belong to the current
+ effective gid. So, work around the issues by creating a
+ subdirectory (we are guaranteed that the subdirectory will be
+ owned by one of our current groups), change ownership of that
+ directory to the current effective gid (which will thus succeed),
+ then create all other files within that directory (eliminating
+ questions on whether inheritance or current id triumphs, since
+ the two methods resolve to the same gid). */
+ ASSERT (mkdir (BASE "dir", 0700) == 0);
+ ASSERT (stat (BASE "dir", &st1) == 0);
+
+ /* Filter out mingw and file systems which have no concept of groups. */
+ result = func (BASE "dir", st1.st_uid, getegid ());
+ if (result == -1 && (errno == ENOSYS || errno == EPERM))
+ {
+ ASSERT (rmdir (BASE "dir") == 0);
+ if (print)
+ fputs ("skipping test: no support for ownership\n", stderr);
+ return 77;
+ }
+ ASSERT (result == 0);
+
+ ASSERT (close (creat (BASE "dir/file", 0600)) == 0);
+ ASSERT (stat (BASE "dir/file", &st1) == 0);
+ ASSERT (st1.st_uid != (uid_t) -1);
+ ASSERT (st1.st_gid != (gid_t) -1);
+ ASSERT (st1.st_gid == getegid ());
+
+ /* Sanity check of error cases. */
+ errno = 0;
+ ASSERT (func ("", -1, -1) == -1);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ ASSERT (func ("no_such", -1, -1) == -1);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ ASSERT (func ("no_such/", -1, -1) == -1);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ ASSERT (func (BASE "dir/file/", -1, -1) == -1);
+ ASSERT (errno == ENOTDIR);
+
+ /* Check that -1 does not alter ownership. */
+ ASSERT (func (BASE "dir/file", -1, st1.st_gid) == 0);
+ ASSERT (func (BASE "dir/file", st1.st_uid, -1) == 0);
+ ASSERT (func (BASE "dir/file", (uid_t) -1, (gid_t) -1) == 0);
+ ASSERT (stat (BASE "dir/file", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+
+ /* Even if the values aren't changing, ctime is required to change
+ if at least one argument is not -1. */
+ nap ();
+ ASSERT (func (BASE "dir/file", st1.st_uid, st1.st_gid) == 0);
+ ASSERT (stat (BASE "dir/file", &st2) == 0);
+ ASSERT (st1.st_ctime < st2.st_ctime
+ || (st1.st_ctime == st2.st_ctime
+ && get_stat_ctime_ns (&st1) < get_stat_ctime_ns (&st2)));
+
+ /* Test symlink behavior. */
+ if (symlink ("link", BASE "dir/link2"))
+ {
+ ASSERT (unlink (BASE "dir/file") == 0);
+ ASSERT (rmdir (BASE "dir") == 0);
+ if (print)
+ fputs ("skipping test: symlinks not supported on this file system\n",
+ stderr);
+ return 77;
+ }
+ result = func (BASE "dir/link2", -1, -1);
+ if (result == -1 && (errno == ENOSYS || errno == EOPNOTSUPP))
+ {
+ ASSERT (unlink (BASE "dir/file") == 0);
+ ASSERT (unlink (BASE "dir/link2") == 0);
+ ASSERT (rmdir (BASE "dir") == 0);
+ if (print)
+ fputs ("skipping test: symlink ownership not supported\n", stderr);
+ return 77;
+ }
+ ASSERT (result == 0);
+ errno = 0;
+ ASSERT (func (BASE "dir/link2/", st1.st_uid, st1.st_gid) == -1);
+ ASSERT (errno == ENOENT);
+ ASSERT (symlink ("file", BASE "dir/link") == 0);
+ ASSERT (mkdir (BASE "dir/sub", 0700) == 0);
+ ASSERT (symlink ("sub", BASE "dir/link3") == 0);
+
+ /* For non-privileged users, lchown can only portably succeed at
+ changing group ownership of a file we own. If we belong to at
+ least two groups, then verifying the correct change is simple.
+ But if we belong to only one group, then we fall back on the
+ other observable effect of lchown: the ctime must be updated. */
+ gids_count = mgetgroups (NULL, st1.st_gid, &gids);
+ if (1 < gids_count)
+ {
+ ASSERT (gids[1] != st1.st_gid);
+ ASSERT (gids[1] != (gid_t) -1);
+ ASSERT (lstat (BASE "dir/link", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+ ASSERT (lstat (BASE "dir/link2", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+
+ errno = 0;
+ ASSERT (func (BASE "dir/link2/", -1, gids[1]) == -1);
+ ASSERT (errno == ENOTDIR);
+ ASSERT (stat (BASE "dir/file", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+ ASSERT (lstat (BASE "dir/link", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+ ASSERT (lstat (BASE "dir/link2", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+
+ ASSERT (func (BASE "dir/link2", -1, gids[1]) == 0);
+ ASSERT (stat (BASE "dir/file", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+ ASSERT (lstat (BASE "dir/link", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+ ASSERT (lstat (BASE "dir/link2", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (gids[1] == st2.st_gid);
+
+ /* Trailing slash follows through to directory. */
+ ASSERT (lstat (BASE "dir/link3", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+ ASSERT (lstat (BASE "dir/sub", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+
+ ASSERT (func (BASE "dir/link3/", -1, gids[1]) == 0);
+ ASSERT (lstat (BASE "dir/link3", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (st1.st_gid == st2.st_gid);
+ ASSERT (lstat (BASE "dir/sub", &st2) == 0);
+ ASSERT (st1.st_uid == st2.st_uid);
+ ASSERT (gids[1] == st2.st_gid);
+ }
+ else if (!CHOWN_CHANGE_TIME_BUG || HAVE_LCHMOD)
+ {
+ /* If we don't have lchmod, and lchown fails to change ctime,
+ then we can't test this part of lchown. */
+ struct stat l1;
+ struct stat l2;
+ ASSERT (stat (BASE "dir/file", &st1) == 0);
+ ASSERT (lstat (BASE "dir/link", &l1) == 0);
+ ASSERT (lstat (BASE "dir/link2", &l2) == 0);
+
+ nap ();
+ errno = 0;
+ ASSERT (func (BASE "dir/link2/", -1, st1.st_gid) == -1);
+ ASSERT (errno == ENOTDIR);
+ ASSERT (stat (BASE "dir/file", &st2) == 0);
+ ASSERT (st1.st_ctime == st2.st_ctime);
+ ASSERT (get_stat_ctime_ns (&st1) == get_stat_ctime_ns (&st2));
+ ASSERT (lstat (BASE "dir/link", &st2) == 0);
+ ASSERT (l1.st_ctime == st2.st_ctime);
+ ASSERT (get_stat_ctime_ns (&l1) == get_stat_ctime_ns (&st2));
+ ASSERT (lstat (BASE "dir/link2", &st2) == 0);
+ ASSERT (l2.st_ctime == st2.st_ctime);
+ ASSERT (get_stat_ctime_ns (&l2) == get_stat_ctime_ns (&st2));
+
+ ASSERT (func (BASE "dir/link2", -1, st1.st_gid) == 0);
+ ASSERT (stat (BASE "dir/file", &st2) == 0);
+ ASSERT (st1.st_ctime == st2.st_ctime);
+ ASSERT (get_stat_ctime_ns (&st1) == get_stat_ctime_ns (&st2));
+ ASSERT (lstat (BASE "dir/link", &st2) == 0);
+ ASSERT (l1.st_ctime == st2.st_ctime);
+ ASSERT (get_stat_ctime_ns (&l1) == get_stat_ctime_ns (&st2));
+ ASSERT (lstat (BASE "dir/link2", &st2) == 0);
+ ASSERT (l2.st_ctime < st2.st_ctime
+ || (l2.st_ctime == st2.st_ctime
+ && get_stat_ctime_ns (&l2) < get_stat_ctime_ns (&st2)));
+
+ /* Trailing slash follows through to directory. */
+ ASSERT (lstat (BASE "dir/sub", &st1) == 0);
+ ASSERT (lstat (BASE "dir/link3", &l1) == 0);
+ nap ();
+ ASSERT (func (BASE "dir/link3/", -1, st1.st_gid) == 0);
+ ASSERT (lstat (BASE "dir/link3", &st2) == 0);
+ ASSERT (l1.st_ctime == st2.st_ctime);
+ ASSERT (get_stat_ctime_ns (&l1) == get_stat_ctime_ns (&st2));
+ ASSERT (lstat (BASE "dir/sub", &st2) == 0);
+ ASSERT (st1.st_ctime < st2.st_ctime
+ || (st1.st_ctime == st2.st_ctime
+ && get_stat_ctime_ns (&st1) < get_stat_ctime_ns (&st2)));
+ }
+
+ /* Cleanup. */
+ free (gids);
+ ASSERT (unlink (BASE "dir/file") == 0);
+ ASSERT (unlink (BASE "dir/link") == 0);
+ ASSERT (unlink (BASE "dir/link2") == 0);
+ ASSERT (unlink (BASE "dir/link3") == 0);
+ ASSERT (rmdir (BASE "dir/sub") == 0);
+ ASSERT (rmdir (BASE "dir") == 0);
+ return 0;
+}
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