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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) International Business Machines Corp., 2001
*/
/*\
* [Description]
*
* Verify that, fchmod(2) will succeed to change the mode of a file
* and set the sticky bit on it if invoked by non-root (uid != 0)
* process with the following constraints,
* - the process is the owner of the file.
* - the effective group ID or one of the supplementary group ID's of the
* process is equal to the group ID of the file.
*/
#include <pwd.h>
#include "fchmod.h"
#include "tst_test.h"
static int fd;
static const char nobody_uid[] = "nobody";
static struct passwd *ltpuser;
static void verify_fchmod(void)
{
struct stat stat_buf;
mode_t file_mode;
TST_EXP_PASS_SILENT(fchmod(fd, PERMS));
if (fstat(fd, &stat_buf) == -1)
tst_brk(TFAIL | TERRNO, "fstat failed");
file_mode = stat_buf.st_mode;
if ((file_mode & PERMS) != PERMS)
tst_res(TFAIL, "%s: Incorrect modes 0%3o, "
"Expected 0777", TESTFILE, file_mode);
else
tst_res(TPASS, "Functionality of fchmod(%d, "
"%#o) successful", fd, PERMS);
}
static void setup(void)
{
ltpuser = SAFE_GETPWNAM(nobody_uid);
SAFE_SETEUID(ltpuser->pw_uid);
fd = SAFE_OPEN(TESTFILE, O_RDWR | O_CREAT, FILE_MODE);
}
static void cleanup(void)
{
if (fd > 0)
SAFE_CLOSE(fd);
}
static struct tst_test test = {
.test_all = verify_fchmod,
.setup = setup,
.cleanup = cleanup,
.needs_tmpdir = 1,
.needs_root = 1,
};
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