bus: parse BusPolicy directive in service files

Add a new directive called BusPolicy to define custom endpoint policies. If
one such directive is given, an endpoint object in the service's ExecContext is
created and the given policy is added to it.

1 files changed, 56 insertions, 0 deletions

diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index b4da6a550e..2f3acd7cbe 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -1752,6 +1752,62 @@ int config_parse_bus_policy(
         return 0;
 }
 
+int config_parse_bus_endpoint_policy(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_free_ char *name = NULL;
+        BusPolicyAccess access;
+        ExecContext *c = data;
+        char *access_str;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        name = strdup(rvalue);
+        if (!name)
+                return log_oom();
+
+        access_str = strpbrk(name, WHITESPACE);
+        if (!access_str) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Invalid endpoint policy value '%s'", rvalue);
+                return 0;
+        }
+
+        *access_str = '\0';
+        access_str++;
+        access_str += strspn(access_str, WHITESPACE);
+
+        access = bus_policy_access_from_string(access_str);
+        if (access <= _BUS_POLICY_ACCESS_INVALID ||
+            access >= _BUS_POLICY_ACCESS_MAX) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Invalid endpoint policy access type '%s'", access_str);
+                return 0;
+        }
+
+        if (!c->bus_endpoint) {
+                r = bus_endpoint_new(&c->bus_endpoint);
+
+                if (r < 0)
+                        return r;
+        }
+
+        return bus_endpoint_add_policy(c->bus_endpoint, name, access);
+}
+
 int config_parse_unit_env_file(const char *unit,
                                const char *filename,
                                unsigned line,