unit: add minimal condition checker for unit startup

1 files changed, 57 insertions, 0 deletions

diff --git a/src/condition.h b/src/condition.h
new file mode 100644
index 0000000000..4e0d63cd51
--- /dev/null
+++ b/src/condition.h
@@ -0,0 +1,57 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef fooconditionhfoo
+#define fooconditionhfoo
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+
+#include "list.h"
+
+typedef enum ConditionType {
+        CONDITION_PATH_EXISTS,
+        CONDITION_KERNEL_COMMAND_LINE,
+        _CONDITION_TYPE_MAX,
+        _CONDITION_TYPE_INVALID = -1
+} ConditionType;
+
+typedef struct Condition {
+        ConditionType type;
+        char *parameter;
+        bool negate;
+
+        LIST_FIELDS(struct Condition, conditions);
+} Condition;
+
+Condition* condition_new(ConditionType type, const char *parameter, bool negate);
+void condition_free(Condition *c);
+void condition_free_list(Condition *c);
+
+bool condition_test(Condition *c);
+bool condition_test_list(Condition *c);
+
+void condition_dump(Condition *c, FILE *f, const char *prefix);
+void condition_dump_list(Condition *c, FILE *f, const char *prefix);
+
+const char* condition_type_to_string(ConditionType t);
+int condition_type_from_string(const char *s);
+
+#endif