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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <sched.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/wait.h>
#include <util.h>
/* When we include libgen.h because we need dirname() we immediately
* undefine basename() since libgen.h defines it as a macro to the POSIX
* version which is really broken. We prefer GNU basename(). */
#include <libgen.h>
#undef basename
#include "alloc-util.h"
#include "cgroup-setup.h"
#include "cgroup-util.h"
#include "env-file.h"
#include "env-util.h"
#include "fs-util.h"
#include "log.h"
#include "path-util.h"
#include "random-util.h"
#include "strv.h"
#include "tests.h"
char* setup_fake_runtime_dir(void) {
char t[] = "/tmp/fake-xdg-runtime-XXXXXX", *p;
assert_se(mkdtemp(t));
assert_se(setenv("XDG_RUNTIME_DIR", t, 1) >= 0);
assert_se(p = strdup(t));
return p;
}
static void load_testdata_env(void) {
static bool called = false;
_cleanup_free_ char *s = NULL;
_cleanup_free_ char *envpath = NULL;
_cleanup_strv_free_ char **pairs = NULL;
char **k, **v;
if (called)
return;
called = true;
assert_se(readlink_and_make_absolute("/proc/self/exe", &s) >= 0);
dirname(s);
envpath = path_join(s, "systemd-runtest.env");
if (load_env_file_pairs(NULL, envpath, &pairs) < 0)
return;
STRV_FOREACH_PAIR(k, v, pairs)
setenv(*k, *v, 0);
}
int get_testdata_dir(const char *suffix, char **ret) {
const char *dir;
char *p;
load_testdata_env();
/* if the env var is set, use that */
dir = getenv("SYSTEMD_TEST_DATA");
if (!dir)
dir = SYSTEMD_TEST_DATA;
if (access(dir, F_OK) < 0)
return log_error_errno(errno, "ERROR: $SYSTEMD_TEST_DATA directory [%s] not accessible: %m", dir);
p = path_join(dir, suffix);
if (!p)
return log_oom();
*ret = p;
return 0;
}
const char* get_catalog_dir(void) {
const char *env;
load_testdata_env();
/* if the env var is set, use that */
env = getenv("SYSTEMD_CATALOG_DIR");
if (!env)
env = SYSTEMD_CATALOG_DIR;
if (access(env, F_OK) < 0) {
fprintf(stderr, "ERROR: $SYSTEMD_CATALOG_DIR directory [%s] does not exist\n", env);
exit(EXIT_FAILURE);
}
return env;
}
bool slow_tests_enabled(void) {
int r;
r = getenv_bool("SYSTEMD_SLOW_TESTS");
if (r >= 0)
return r;
if (r != -ENXIO)
log_warning_errno(r, "Cannot parse $SYSTEMD_SLOW_TESTS, ignoring.");
return SYSTEMD_SLOW_TESTS_DEFAULT;
}
void test_setup_logging(int level) {
log_set_max_level(level);
log_parse_environment();
log_open();
}
int log_tests_skipped(const char *message) {
log_notice("%s: %s, skipping tests.",
program_invocation_short_name, message);
return EXIT_TEST_SKIP;
}
int log_tests_skipped_errno(int r, const char *message) {
log_notice_errno(r, "%s: %s, skipping tests: %m",
program_invocation_short_name, message);
return EXIT_TEST_SKIP;
}
bool have_namespaces(void) {
siginfo_t si = {};
pid_t pid;
/* Checks whether namespaces are available. In some cases they aren't. We do this by calling unshare(), and we
* do so in a child process in order not to affect our own process. */
pid = fork();
assert_se(pid >= 0);
if (pid == 0) {
/* child */
if (unshare(CLONE_NEWNS) < 0)
_exit(EXIT_FAILURE);
if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) < 0)
_exit(EXIT_FAILURE);
_exit(EXIT_SUCCESS);
}
assert_se(waitid(P_PID, pid, &si, WEXITED) >= 0);
assert_se(si.si_code == CLD_EXITED);
if (si.si_status == EXIT_SUCCESS)
return true;
if (si.si_status == EXIT_FAILURE)
return false;
assert_not_reached("unexpected exit code");
}
bool can_memlock(void) {
/* Let's see if we can mlock() a larger blob of memory. BPF programs are charged against
* RLIMIT_MEMLOCK, hence let's first make sure we can lock memory at all, and skip the test if we
* cannot. Why not check RLIMIT_MEMLOCK explicitly? Because in container environments the
* RLIMIT_MEMLOCK value we see might not match the RLIMIT_MEMLOCK value actually in effect. */
void *p = mmap(NULL, CAN_MEMLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_SHARED, -1, 0);
if (p == MAP_FAILED)
return false;
bool b = mlock(p, CAN_MEMLOCK_SIZE) >= 0;
if (b)
assert_se(munlock(p, CAN_MEMLOCK_SIZE) >= 0);
assert_se(munmap(p, CAN_MEMLOCK_SIZE) >= 0);
return b;
}
int enter_cgroup_subroot(char **ret_cgroup) {
_cleanup_free_ char *cgroup_root = NULL, *cgroup_subroot = NULL;
CGroupMask supported;
int r;
r = cg_pid_get_path(NULL, 0, &cgroup_root);
if (r == -ENOMEDIUM)
return log_warning_errno(r, "cg_pid_get_path(NULL, 0, ...) failed: %m");
assert(r >= 0);
assert_se(asprintf(&cgroup_subroot, "%s/%" PRIx64, cgroup_root, random_u64()) >= 0);
assert_se(cg_mask_supported(&supported) >= 0);
/* If this fails, then we don't mind as the later cgroup operations will fail too, and it's fine if
* we handle any errors at that point. */
r = cg_create_everywhere(supported, _CGROUP_MASK_ALL, cgroup_subroot);
if (r < 0)
return r;
r = cg_attach_everywhere(supported, cgroup_subroot, 0, NULL, NULL);
if (r < 0)
return r;
if (ret_cgroup)
*ret_cgroup = TAKE_PTR(cgroup_subroot);
return 0;
}
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