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-rw-r--r--src/shared/tests.c346
1 files changed, 346 insertions, 0 deletions
diff --git a/src/shared/tests.c b/src/shared/tests.c
new file mode 100644
index 0000000..3882a18
--- /dev/null
+++ b/src/shared/tests.c
@@ -0,0 +1,346 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <sched.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <sys/mount.h>
+#include <sys/wait.h>
+
+#include "sd-bus.h"
+
+#include "alloc-util.h"
+#include "bus-error.h"
+#include "bus-locator.h"
+#include "bus-util.h"
+#include "bus-wait-for-jobs.h"
+#include "cgroup-setup.h"
+#include "cgroup-util.h"
+#include "env-file.h"
+#include "env-util.h"
+#include "fd-util.h"
+#include "fs-util.h"
+#include "log.h"
+#include "namespace-util.h"
+#include "path-util.h"
+#include "process-util.h"
+#include "random-util.h"
+#include "strv.h"
+#include "tests.h"
+#include "tmpfile-util.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, *d = NULL, *envpath = NULL;
+ _cleanup_strv_free_ char **pairs = NULL;
+ int r;
+
+ if (called)
+ return;
+ called = true;
+
+ assert_se(readlink_and_make_absolute("/proc/self/exe", &s) >= 0);
+ assert_se(path_extract_directory(s, &d) >= 0);
+ assert_se(envpath = path_join(d, "systemd-runtest.env"));
+
+ r = load_env_file_pairs(NULL, envpath, &pairs);
+ if (r < 0) {
+ log_debug_errno(r, "Reading %s failed: %m", envpath);
+ return;
+ }
+
+ STRV_FOREACH_PAIR(k, v, pairs)
+ assert_se(setenv(*k, *v, 0) >= 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 write_tmpfile(char *pattern, const char *contents) {
+ _cleanup_close_ int fd = -EBADF;
+
+ assert(pattern);
+ assert(contents);
+
+ fd = mkostemp_safe(pattern);
+ if (fd < 0)
+ return fd;
+
+ ssize_t l = strlen(contents);
+ errno = 0;
+ if (write(fd, contents, l) != l)
+ return errno_or_else(EIO);
+ return 0;
+}
+
+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 (detach_mount_namespace() < 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();
+}
+
+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;
+}
+
+static int allocate_scope(void) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
+ _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
+ _cleanup_free_ char *scope = NULL;
+ const char *object;
+ int r;
+
+ /* Let's try to run this test in a scope of its own, with delegation turned on, so that PID 1 doesn't
+ * interfere with our cgroup management. */
+
+ r = sd_bus_default_system(&bus);
+ if (r < 0)
+ return log_error_errno(r, "Failed to connect to system bus: %m");
+
+ r = bus_wait_for_jobs_new(bus, &w);
+ if (r < 0)
+ return log_error_errno(r, "Could not watch jobs: %m");
+
+ if (asprintf(&scope, "%s-%" PRIx64 ".scope", program_invocation_short_name, random_u64()) < 0)
+ return log_oom();
+
+ r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StartTransientUnit");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ /* Name and Mode */
+ r = sd_bus_message_append(m, "ss", scope, "fail");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ /* Properties */
+ r = sd_bus_message_open_container(m, 'a', "(sv)");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, (uint32_t) getpid_cached());
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_append(m, "(sv)", "Delegate", "b", 1);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_append(m, "(sv)", "CollectMode", "s", "inactive-or-failed");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ /* Auxiliary units */
+ r = sd_bus_message_append(m, "a(sa(sv))", 0);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_call(bus, m, 0, &error, &reply);
+ if (r < 0)
+ return log_error_errno(r, "Failed to start transient scope unit: %s", bus_error_message(&error, r));
+
+ r = sd_bus_message_read(reply, "o", &object);
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ r = bus_wait_for_jobs_one(w, object, false, NULL);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int enter_cgroup(char **ret_cgroup, bool enter_subroot) {
+ _cleanup_free_ char *cgroup_root = NULL, *cgroup_subroot = NULL;
+ CGroupMask supported;
+ int r;
+
+ r = allocate_scope();
+ if (r < 0)
+ log_warning_errno(r, "Couldn't allocate a scope unit for this test, proceeding without.");
+
+ 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);
+
+ if (enter_subroot)
+ assert_se(asprintf(&cgroup_subroot, "%s/%" PRIx64, cgroup_root, random_u64()) >= 0);
+ else {
+ cgroup_subroot = strdup(cgroup_root);
+ assert_se(cgroup_subroot != NULL);
+ }
+
+ 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;
+}
+
+int enter_cgroup_subroot(char **ret_cgroup) {
+ return enter_cgroup(ret_cgroup, true);
+}
+
+int enter_cgroup_root(char **ret_cgroup) {
+ return enter_cgroup(ret_cgroup, false);
+}
+
+const char *ci_environment(void) {
+ /* We return a string because we might want to provide multiple bits of information later on: not
+ * just the general CI environment type, but also whether we're sanitizing or not, etc. The caller is
+ * expected to use strstr on the returned value. */
+ static const char *ans = POINTER_MAX;
+ int r;
+
+ if (ans != POINTER_MAX)
+ return ans;
+
+ /* We allow specifying the environment with $CITYPE. Nobody uses this so far, but we are ready. */
+ const char *citype = getenv("CITYPE");
+ if (!isempty(citype))
+ return (ans = citype);
+
+ if (getenv_bool("TRAVIS") > 0)
+ return (ans = "travis");
+ if (getenv_bool("SEMAPHORE") > 0)
+ return (ans = "semaphore");
+ if (getenv_bool("GITHUB_ACTIONS") > 0)
+ return (ans = "github-actions");
+ if (getenv("AUTOPKGTEST_ARTIFACTS") || getenv("AUTOPKGTEST_TMP"))
+ return (ans = "autopkgtest");
+ if (getenv("SALSA_CI_IMAGES"))
+ return (ans = "salsa-ci");
+
+ FOREACH_STRING(var, "CI", "CONTINOUS_INTEGRATION") {
+ /* Those vars are booleans according to Semaphore and Travis docs:
+ * https://docs.travis-ci.com/user/environment-variables/#default-environment-variables
+ * https://docs.semaphoreci.com/ci-cd-environment/environment-variables/#ci
+ */
+ r = getenv_bool(var);
+ if (r > 0)
+ return (ans = "unknown"); /* Some other unknown thing */
+ if (r == 0)
+ return (ans = NULL);
+ }
+
+ return (ans = NULL);
+}
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