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/*
* Check decoding of fchownat syscall.
*
* Copyright (c) 2016-2018 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <fcntl.h>
#if defined AT_FDCWD && defined AT_SYMLINK_NOFOLLOW
# include <stdio.h>
# include <unistd.h>
# include "secontext.h"
int
main(void)
{
/*
* Make sure the current workdir of the tracee
* is different from the current workdir of the tracer.
*/
create_and_enter_subdir("fchownat_subdir");
char *my_secontext = SECONTEXT_PID_MY();
uid_t uid = geteuid();
uid_t gid = getegid();
static const char sample[] = "fchownat_sample";
int fd = open(sample, O_RDONLY | O_CREAT, 0400);
if (fd == -1)
perror_msg_and_fail("open");
close(fd);
char *sample_secontext = SECONTEXT_FILE(sample);
/*
* Tests with AT_FDCWD.
*/
long rc = syscall(__NR_fchownat, AT_FDCWD, sample, uid, gid, 0);
printf("%s%s(AT_FDCWD, \"%s\"%s, %d, %d, 0) = %s\n",
my_secontext, "fchownat",
sample, sample_secontext,
uid, gid, sprintrc(rc));
if (unlink(sample))
perror_msg_and_fail("unlink");
rc = syscall(__NR_fchownat, AT_FDCWD,
sample, -1, -1L, AT_SYMLINK_NOFOLLOW);
printf("%s%s(AT_FDCWD, \"%s\", -1, -1, AT_SYMLINK_NOFOLLOW) = %s\n",
my_secontext, "fchownat",
sample, sprintrc(rc));
/*
* Tests with dirfd.
*/
int cwd_fd = get_dir_fd(".");
char *cwd = get_fd_path(cwd_fd);
char *cwd_secontext = SECONTEXT_FILE(".");
char *sample_realpath = xasprintf("%s/%s", cwd, sample);
/* no file */
rc = syscall(__NR_fchownat, cwd_fd, sample, uid, gid, 0);
printf("%s%s(%d%s, \"%s\", %d, %d, 0) = %s\n",
my_secontext, "fchownat",
cwd_fd, cwd_secontext,
sample,
uid, gid,
sprintrc(rc));
fd = open(sample, O_RDONLY | O_CREAT, 0400);
if (fd == -1)
perror_msg_and_fail("open");
close(fd);
rc = syscall(__NR_fchownat, cwd_fd, sample, uid, gid, 0);
printf("%s%s(%d%s, \"%s\"%s, %d, %d, 0) = %s\n",
my_secontext, "fchownat",
cwd_fd, cwd_secontext,
sample, sample_secontext,
uid, gid,
sprintrc(rc));
/* cwd_fd ignored when path is absolute */
if (chdir("../.."))
perror_msg_and_fail("chdir");
rc = syscall(__NR_fchownat, cwd_fd, sample_realpath, uid, gid, 0);
printf("%s%s(%d%s, \"%s\"%s, %d, %d, 0) = %s\n",
my_secontext, "fchownat",
cwd_fd, cwd_secontext,
sample_realpath, sample_secontext,
uid, gid,
sprintrc(rc));
if (fchdir(cwd_fd))
perror_msg_and_fail("fchdir");
if (unlink(sample))
perror_msg_and_fail("unlink");
leave_and_remove_subdir();
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("AT_FDCWD && AT_SYMLINK_NOFOLLOW")
#endif
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