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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include "alloc-util.h"
#include "fd-util.h"
#include "namespace.h"
#include "process-util.h"
#include "string-util.h"
#include "tests.h"
#include "user-util.h"
#include "util.h"
#include "virt.h"
static void test_tmpdir(const char *id, const char *A, const char *B) {
_cleanup_free_ char *a, *b;
struct stat x, y;
char *c, *d;
assert_se(setup_tmp_dirs(id, &a, &b) == 0);
assert_se(startswith(a, A));
assert_se(startswith(b, B));
assert_se(stat(a, &x) >= 0);
assert_se(stat(b, &y) >= 0);
assert_se(S_ISDIR(x.st_mode));
assert_se(S_ISDIR(y.st_mode));
assert_se((x.st_mode & 01777) == 0700);
assert_se((y.st_mode & 01777) == 0700);
c = strjoina(a, "/tmp");
d = strjoina(b, "/tmp");
assert_se(stat(c, &x) >= 0);
assert_se(stat(d, &y) >= 0);
assert_se(S_ISDIR(x.st_mode));
assert_se(S_ISDIR(y.st_mode));
assert_se((x.st_mode & 01777) == 01777);
assert_se((y.st_mode & 01777) == 01777);
assert_se(rmdir(c) >= 0);
assert_se(rmdir(d) >= 0);
assert_se(rmdir(a) >= 0);
assert_se(rmdir(b) >= 0);
}
static void test_netns(void) {
_cleanup_close_pair_ int s[2] = { -1, -1 };
pid_t pid1, pid2, pid3;
int r, n = 0;
siginfo_t si;
if (geteuid() > 0) {
(void) log_tests_skipped("not root");
return;
}
assert_se(socketpair(AF_UNIX, SOCK_DGRAM, 0, s) >= 0);
pid1 = fork();
assert_se(pid1 >= 0);
if (pid1 == 0) {
r = setup_netns(s);
assert_se(r >= 0);
_exit(r);
}
pid2 = fork();
assert_se(pid2 >= 0);
if (pid2 == 0) {
r = setup_netns(s);
assert_se(r >= 0);
exit(r);
}
pid3 = fork();
assert_se(pid3 >= 0);
if (pid3 == 0) {
r = setup_netns(s);
assert_se(r >= 0);
exit(r);
}
r = wait_for_terminate(pid1, &si);
assert_se(r >= 0);
assert_se(si.si_code == CLD_EXITED);
n += si.si_status;
r = wait_for_terminate(pid2, &si);
assert_se(r >= 0);
assert_se(si.si_code == CLD_EXITED);
n += si.si_status;
r = wait_for_terminate(pid3, &si);
assert_se(r >= 0);
assert_se(si.si_code == CLD_EXITED);
n += si.si_status;
assert_se(n == 1);
}
static void test_protect_kernel_logs(void) {
int r;
pid_t pid;
static const NamespaceInfo ns_info = {
.protect_kernel_logs = true,
};
if (geteuid() > 0) {
(void) log_tests_skipped("not root");
return;
}
/* In a container we likely don't have access to /dev/kmsg */
if (detect_container() > 0) {
(void) log_tests_skipped("in container");
return;
}
pid = fork();
assert_se(pid >= 0);
if (pid == 0) {
_cleanup_close_ int fd = -1;
fd = open("/dev/kmsg", O_RDONLY | O_CLOEXEC);
assert_se(fd > 0);
r = setup_namespace(NULL,
NULL,
&ns_info,
NULL,
NULL,
NULL,
NULL,
NULL, 0,
NULL, 0,
NULL,
NULL,
NULL,
PROTECT_HOME_NO,
PROTECT_SYSTEM_NO,
0,
NULL,
0,
NULL,
NULL,
0,
NULL);
assert_se(r == 0);
assert_se(setresuid(UID_NOBODY, UID_NOBODY, UID_NOBODY) >= 0);
assert_se(open("/dev/kmsg", O_RDONLY | O_CLOEXEC) < 0);
assert_se(errno == EACCES);
_exit(EXIT_SUCCESS);
}
assert_se(wait_for_terminate_and_check("ns-kernellogs", pid, WAIT_LOG) == EXIT_SUCCESS);
}
int main(int argc, char *argv[]) {
sd_id128_t bid;
char boot_id[SD_ID128_STRING_MAX];
_cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *zz = NULL;
test_setup_logging(LOG_INFO);
if (!have_namespaces()) {
log_tests_skipped("Don't have namespace support");
return EXIT_TEST_SKIP;
}
assert_se(sd_id128_get_boot(&bid) >= 0);
sd_id128_to_string(bid, boot_id);
x = strjoin("/tmp/systemd-private-", boot_id, "-abcd.service-");
y = strjoin("/var/tmp/systemd-private-", boot_id, "-abcd.service-");
assert_se(x && y);
test_tmpdir("abcd.service", x, y);
z = strjoin("/tmp/systemd-private-", boot_id, "-sys-devices-pci0000:00-0000:00:1a.0-usb3-3\\x2d1-3\\x2d1:1.0-bluetooth-hci0.device-");
zz = strjoin("/var/tmp/systemd-private-", boot_id, "-sys-devices-pci0000:00-0000:00:1a.0-usb3-3\\x2d1-3\\x2d1:1.0-bluetooth-hci0.device-");
assert_se(z && zz);
test_tmpdir("sys-devices-pci0000:00-0000:00:1a.0-usb3-3\\x2d1-3\\x2d1:1.0-bluetooth-hci0.device", z, zz);
test_netns();
test_protect_kernel_logs();
return EXIT_SUCCESS;
}
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