89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) International Business Machines Corp., 2001
|
|
* Author: Wayne Boyer
|
|
*
|
|
* Test Description:
|
|
* Verify that, fchmod(2) will succeed to change the mode of a directory
|
|
* but fails to set the setgid bit on it if invoked by non-root (uid != 0)
|
|
* process with the following constraints,
|
|
* - the process is the owner of the directory.
|
|
* - the effective group ID or one of the supplementary group ID's of the
|
|
* process is not equal to the group ID of the directory.
|
|
*
|
|
* Expected Result:
|
|
* fchmod() should return value 0 on success and though succeeds to change
|
|
* the mode of a directory but fails to set setgid bit on it.
|
|
*/
|
|
|
|
#include <pwd.h>
|
|
#include <errno.h>
|
|
|
|
#include "tst_test.h"
|
|
#include "fchmod.h"
|
|
|
|
#define PERMS_DIR 043777
|
|
|
|
static int fd;
|
|
|
|
static void verify_fchmod(void)
|
|
{
|
|
struct stat stat_buf;
|
|
mode_t dir_mode;
|
|
|
|
TEST(fchmod(fd, PERMS_DIR));
|
|
if (TST_RET == -1)
|
|
tst_res(TFAIL | TTERRNO, "fchmod() failed unexpectly");
|
|
|
|
SAFE_FSTAT(fd, &stat_buf);
|
|
dir_mode = stat_buf.st_mode;
|
|
|
|
if ((PERMS_DIR & ~S_ISGID) != dir_mode) {
|
|
tst_res(TFAIL, "%s: Incorrect modes 0%03o, Expected 0%03o",
|
|
TESTDIR, dir_mode & ~S_ISGID, PERMS_DIR);
|
|
} else {
|
|
tst_res(TPASS, "Functionality of fchmod(%d, %#o) successful",
|
|
fd, PERMS_DIR);
|
|
}
|
|
}
|
|
|
|
static void setup(void)
|
|
{
|
|
struct passwd *ltpuser;
|
|
struct group *ltpgroup;
|
|
|
|
ltpuser = SAFE_GETPWNAM("nobody");
|
|
ltpgroup = SAFE_GETGRNAM("bin");
|
|
|
|
SAFE_MKDIR(TESTDIR, DIR_MODE);
|
|
|
|
if (setgroups(1, <puser->pw_gid) == -1) {
|
|
tst_brk(TBROK, "Couldn't change supplementary group Id: %s",
|
|
tst_strerrno(TST_ERR));
|
|
}
|
|
|
|
SAFE_CHOWN(TESTDIR, ltpuser->pw_uid, ltpgroup->gr_gid);
|
|
|
|
SAFE_SETEGID(ltpuser->pw_gid);
|
|
SAFE_SETEUID(ltpuser->pw_uid);
|
|
|
|
fd = SAFE_OPEN(TESTDIR, O_RDONLY);
|
|
}
|
|
|
|
static void cleanup(void)
|
|
{
|
|
if (fd > 0)
|
|
SAFE_CLOSE(fd);
|
|
|
|
SAFE_SETEGID(0);
|
|
SAFE_SETEUID(0);
|
|
}
|
|
|
|
static struct tst_test test = {
|
|
.test_all = verify_fchmod,
|
|
.needs_root = 1,
|
|
.setup = setup,
|
|
.cleanup = cleanup,
|
|
.needs_tmpdir = 1,
|
|
};
|