You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
1.7 KiB
69 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/* Copyright (c) Matthew Wilcox for Hewlett Packard 2003
|
|
* Author: Matthew Wilcox
|
|
*
|
|
* Test Description:
|
|
* This test verifies that flock locks held on one fd conflict with flock
|
|
* locks held on a different fd.
|
|
*
|
|
* Test Steps:
|
|
* The process opens two file descriptors on the same file. It acquires
|
|
* an exclusive flock on the first descriptor, checks that attempting to
|
|
* acquire an flock on the second descriptor fails. Then it removes the
|
|
* first descriptor's lock and attempts to acquire an exclusive lock on
|
|
* the second descriptor.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <sys/file.h>
|
|
|
|
#include "tst_test.h"
|
|
|
|
static void verify_flock(void)
|
|
{
|
|
int fd1, fd2;
|
|
|
|
fd1 = SAFE_OPEN("testfile", O_RDWR);
|
|
TEST(flock(fd1, LOCK_EX | LOCK_NB));
|
|
if (TST_RET != 0)
|
|
tst_res(TFAIL | TTERRNO, "First attempt to flock() failed");
|
|
else
|
|
tst_res(TPASS, "First attempt to flock() passed");
|
|
|
|
fd2 = SAFE_OPEN("testfile", O_RDWR);
|
|
TEST(flock(fd2, LOCK_EX | LOCK_NB));
|
|
if (TST_RET == -1)
|
|
tst_res(TPASS | TTERRNO, "Second attempt to flock() denied");
|
|
else
|
|
tst_res(TFAIL, "Second attempt to flock() succeeded!");
|
|
|
|
TEST(flock(fd1, LOCK_UN));
|
|
if (TST_RET != 0)
|
|
tst_res(TFAIL | TTERRNO, "Failed to unlock fd1");
|
|
else
|
|
tst_res(TPASS, "Unlocked fd1");
|
|
|
|
TEST(flock(fd2, LOCK_EX | LOCK_NB));
|
|
if (TST_RET != 0)
|
|
tst_res(TFAIL | TTERRNO, "Third attempt to flock() denied!");
|
|
else
|
|
tst_res(TPASS, "Third attempt to flock() succeeded");
|
|
|
|
SAFE_CLOSE(fd1);
|
|
SAFE_CLOSE(fd2);
|
|
}
|
|
|
|
static void setup(void)
|
|
{
|
|
int fd;
|
|
|
|
fd = SAFE_OPEN("testfile", O_CREAT | O_TRUNC | O_RDWR, 0666);
|
|
SAFE_CLOSE(fd);
|
|
}
|
|
|
|
static struct tst_test test = {
|
|
.test_all = verify_flock,
|
|
.needs_tmpdir = 1,
|
|
.setup = setup,
|
|
};
|