+static int condition_test_security(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_SECURITY);
+
+ if (streq(c->parameter, "selinux"))
+ return mac_selinux_use() == !c->negate;
+ if (streq(c->parameter, "smack"))
+ return mac_smack_use() == !c->negate;
+ if (streq(c->parameter, "apparmor"))
+ return mac_apparmor_use() == !c->negate;
+ if (streq(c->parameter, "audit"))
+ return use_audit() == !c->negate;
+ if (streq(c->parameter, "ima"))
+ return use_ima() == !c->negate;
+
+ return c->negate;
+}
+
+static int condition_test_capability(Condition *c) {
+ _cleanup_fclose_ FILE *f = NULL;
+ cap_value_t value;
+ char line[LINE_MAX];
+ unsigned long long capabilities = -1;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_CAPABILITY);
+
+ /* If it's an invalid capability, we don't have it */
+
+ if (cap_from_name(c->parameter, &value) < 0)
+ return -EINVAL;
+
+ /* If it's a valid capability we default to assume
+ * that we have it */
+
+ f = fopen("/proc/self/status", "re");
+ if (!f)
+ return -errno;
+
+ while (fgets(line, sizeof(line), f)) {
+ truncate_nl(line);
+
+ if (startswith(line, "CapBnd:")) {
+ (void) sscanf(line+7, "%llx", &capabilities);
+ break;
+ }
+ }
+
+ return !!(capabilities & (1ULL << value)) == !c->negate;
+}
+
+static int condition_test_needs_update(Condition *c) {
+ const char *p;
+ struct stat usr, other;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_NEEDS_UPDATE);
+
+ /* If the file system is read-only we shouldn't suggest an update */
+ if (path_is_read_only_fs(c->parameter) > 0)
+ return c->negate;
+
+ /* Any other failure means we should allow the condition to be true,
+ * so that we rather invoke too many update tools then too
+ * few. */
+
+ if (!path_is_absolute(c->parameter))
+ return !c->negate;
+
+ p = strappenda(c->parameter, "/.updated");
+ if (lstat(p, &other) < 0)
+ return !c->negate;
+
+ if (lstat("/usr/", &usr) < 0)
+ return !c->negate;
+
+ return (usr.st_mtim.tv_sec > other.st_mtim.tv_sec ||
+ (usr.st_mtim.tv_sec == other.st_mtim.tv_sec && usr.st_mtim.tv_nsec > other.st_mtim.tv_nsec)) == !c->negate;
+}
+
+static int condition_test_first_boot(Condition *c) {
+ int r;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_FIRST_BOOT);
+
+ r = parse_boolean(c->parameter);
+ if (r < 0)
+ return r;
+
+ return ((access("/run/systemd/first-boot", F_OK) >= 0) == !!r) == !c->negate;
+}
+
+static int condition_test_path_exists(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_EXISTS);
+
+ return (access(c->parameter, F_OK) >= 0) == !c->negate;
+}
+
+static int condition_test_path_exists_glob(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_EXISTS_GLOB);
+
+ return (glob_exists(c->parameter) > 0) == !c->negate;
+}
+
+static int condition_test_path_is_directory(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_IS_DIRECTORY);
+
+ return (is_dir(c->parameter, true) > 0) == !c->negate;
+}
+
+static int condition_test_path_is_symbolic_link(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_IS_SYMBOLIC_LINK);
+
+ return (is_symlink(c->parameter) > 0) == !c->negate;
+}
+
+static int condition_test_path_is_mount_point(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_IS_MOUNT_POINT);
+
+ return (path_is_mount_point(c->parameter, true) > 0) == !c->negate;
+}
+
+static int condition_test_path_is_read_write(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_IS_READ_WRITE);
+
+ return (path_is_read_only_fs(c->parameter) > 0) == c->negate;
+}
+
+static int condition_test_directory_not_empty(Condition *c) {
+ int r;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_DIRECTORY_NOT_EMPTY);
+
+ r = dir_is_empty(c->parameter);
+ return !(r == -ENOENT || r > 0) == !c->negate;
+}
+
+static int condition_test_file_not_empty(Condition *c) {
+ struct stat st;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_FILE_NOT_EMPTY);
+
+ return (stat(c->parameter, &st) >= 0 &&
+ S_ISREG(st.st_mode) &&
+ st.st_size > 0) == !c->negate;
+}
+
+static int condition_test_file_is_executable(Condition *c) {
+ struct stat st;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_FILE_IS_EXECUTABLE);
+
+ return (stat(c->parameter, &st) >= 0 &&
+ S_ISREG(st.st_mode) &&
+ (st.st_mode & 0111)) == !c->negate;
+}
+
+static int condition_test_null(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_NULL);
+
+ /* Note that during parsing we already evaluate the string and
+ * store it in c->negate */
+ return !c->negate;
+}
+
+int condition_test(Condition *c) {
+
+ static int (*const condition_tests[_CONDITION_TYPE_MAX])(Condition *c) = {
+ [CONDITION_PATH_EXISTS] = condition_test_path_exists,
+ [CONDITION_PATH_EXISTS_GLOB] = condition_test_path_exists_glob,
+ [CONDITION_PATH_IS_DIRECTORY] = condition_test_path_is_directory,
+ [CONDITION_PATH_IS_SYMBOLIC_LINK] = condition_test_path_is_symbolic_link,
+ [CONDITION_PATH_IS_MOUNT_POINT] = condition_test_path_is_mount_point,
+ [CONDITION_PATH_IS_READ_WRITE] = condition_test_path_is_read_write,
+ [CONDITION_DIRECTORY_NOT_EMPTY] = condition_test_directory_not_empty,
+ [CONDITION_FILE_NOT_EMPTY] = condition_test_file_not_empty,
+ [CONDITION_FILE_IS_EXECUTABLE] = condition_test_file_is_executable,
+ [CONDITION_KERNEL_COMMAND_LINE] = condition_test_kernel_command_line,
+ [CONDITION_VIRTUALIZATION] = condition_test_virtualization,
+ [CONDITION_SECURITY] = condition_test_security,
+ [CONDITION_CAPABILITY] = condition_test_capability,
+ [CONDITION_HOST] = condition_test_host,
+ [CONDITION_AC_POWER] = condition_test_ac_power,
+ [CONDITION_ARCHITECTURE] = condition_test_architecture,
+ [CONDITION_NEEDS_UPDATE] = condition_test_needs_update,
+ [CONDITION_FIRST_BOOT] = condition_test_first_boot,
+ [CONDITION_NULL] = condition_test_null,
+ };
+
+ assert(c);
+ assert(c->type >= 0);
+ assert(c->type < _CONDITION_TYPE_MAX);
+
+ return condition_tests[c->type](c);
+}
+