afm-binding: Allow use of appid instead of runid

This facility avoid the double call 'ps', 'kill' and
allow a single call to 'kill' with the application id.

Bug-AGL: SPEC-1189

Change-Id: I71861c06847e855b05dc8294ab1ea6785f555416
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

3 files changed, 47 insertions, 6 deletions

diff --git a/src/afm-binding.c b/src/afm-binding.c
index 51316e7..7fe9f3d 100644
--- a/src/afm-binding.c
+++ b/src/afm-binding.c
@@ -130,17 +130,34 @@ static int onappid(struct afb_req req, const char *method, const char **appid)
 static int onrunid(struct afb_req req, const char *method, int *runid)
 {
 	struct json_object *json;
+	const char *appid;
 
+	/* get the paramaters of the request */
 	json = afb_req_json(req);
-	if (wrap_json_unpack(json, "i", runid)
-		&& wrap_json_unpack(json, "{si}", _runid_, runid)) {
-		INFO("bad request method %s: %s", method,
-					json_object_to_json_string(json));
-		bad_request(req);
+
+	/* get the runid if any */
+	if (!wrap_json_unpack(json, "i", runid)
+	 || !wrap_json_unpack(json, "{si}", _runid_, runid)) {
+		INFO("method %s called for %d", method, *runid);
+		return 1;
+	}
+
+	/* get the appid if any */
+	if (!onappid(req, method, &appid))
+		return 0;
+
+	/* search the runid of the appid */
+	*runid = afm_urun_search_runid(afudb, appid, afb_req_get_uid(req));
+	if (*runid < 0) {
+		/* nothing appropriate */
+		INFO("method %s can't get runid for %s: %m", method,
+							appid);
+		not_found(req);
 		return 0;
 	}
 
-	INFO("method %s called for %d", method, *runid);
+	/* found */
+	INFO("method %s called for %s -> %d", method, appid, *runid);
 	return 1;
 }
 
diff --git a/src/afm-urun.c b/src/afm-urun.c
index d242df8..36f40b2 100644
--- a/src/afm-urun.c
+++ b/src/afm-urun.c
@@ -424,3 +424,26 @@ end:
 	return result;
 }
 
+/*
+ * Search the runid, if any, of the application of 'id' for the user 'uid'.
+ * Returns the pid (a positive not null number) or -1 in case of error.
+ */
+int afm_urun_search_runid(struct afm_udb *db, const char *id, int uid)
+{
+	int isuser, pid;
+	const char *udpath;
+	struct json_object *appli;
+
+	appli = afm_udb_get_application_private(db, id, uid);
+	if (!appli) {
+		NOTICE("Unknown appid %s", id);
+		errno = ENOENT;
+		pid = -1;
+	} else if (get_basis(appli, &isuser, &udpath, 0, uid) < 0) {
+		pid = -1;
+	} else {
+		pid = systemd_unit_pid_of_dpath(isuser, udpath);
+	}
+	return pid;
+}
+
diff --git a/src/afm-urun.h b/src/afm-urun.h
index 178edf9..3914aec 100644
--- a/src/afm-urun.h
+++ b/src/afm-urun.h
@@ -25,4 +25,5 @@ extern int afm_urun_pause(int runid, int uid);
 extern int afm_urun_resume(int runid, int uid);
 extern struct json_object *afm_urun_list(struct afm_udb *db, int uid);
 extern struct json_object *afm_urun_state(struct afm_udb *db, int runid, int uid);
+extern int afm_urun_search_runid(struct afm_udb *db, const char *id, int uid);