support kill container

Signed-off-by: Gao feng <omarapazanadi@gmail.com>

src/hyper.h

@@ -28,6 +28,7 @@ enum {
 	WRITEFILE,
 	READFILE,
 	NEWCONTAINER,
+	KILLCONTAINER,
 };
 
 enum {
@@ -65,6 +66,11 @@ struct hyper_win_size {
 	uint64_t	seq;
 };
 
+struct hyper_killer {
+	char		*id;
+	int		signal;
+};
+
 struct hyper_reader {
 	char		*id;
 	char		*file;

src/init.c

@@ -719,6 +719,29 @@ static int hyper_new_container(char *json, int length)
 	return ret;
 }
 
+static int hyper_kill_container(char *json, int length)
+{
+	struct hyper_killer killer;
+	struct hyper_container *c;
+	struct hyper_pod *pod = &global_pod;
+	int ret = -1;
+
+	if (hyper_parse_kill_container(&killer, json, length) < 0) {
+		goto out;
+	}
+
+	c = hyper_find_container(pod, killer.id);
+	if (c == NULL) {
+		fprintf(stderr, "can not find container whose id is %s\n", killer.id);
+		goto out;
+	}
+
+	kill(c->exec.pid, killer.signal);
+	ret = 0;
+out:
+	return ret;
+}
+
 static int hyper_cmd_write_file(char *json, int length)
 {
 	struct hyper_writter writter;
@@ -1145,6 +1168,9 @@ static int hyper_channel_handle(struct hyper_event *de, uint32_t len)
 	case NEWCONTAINER:
 		ret = hyper_new_container((char *)buf->data + 8, len - 8);
 		break;
+	case KILLCONTAINER:
+		ret = hyper_kill_container((char *)buf->data + 8, len - 8);
+		break;
 	default:
 		ret = -1;
 		break;

src/parse.c

@@ -740,6 +740,68 @@ fail:
 	return NULL;
 }
 
+int hyper_parse_kill_container(struct hyper_killer *killer, char *json, int length)
+{
+	int i, n, ret = -1;
+	jsmn_parser p;
+	int toks_num = 10;
+	jsmntok_t *toks = NULL;
+
+	memset(killer, 0, sizeof(*killer));
+realloc:
+	toks = realloc(toks, toks_num * sizeof(jsmntok_t));
+	if (toks == NULL) {
+		fprintf(stderr, "allocate tokens for kill container failed\n");
+		goto out;
+	}
+
+	jsmn_init(&p);
+
+	n = jsmn_parse(&p, json, length,  toks, toks_num);
+	if (n < 0) {
+		fprintf(stdout, "jsmn parse failed, n is %d\n", n);
+		if (n == JSMN_ERROR_NOMEM) {
+			toks_num *= 2;
+			goto realloc;
+		}
+
+		goto out;
+	}
+
+	for (i = 0; i < n; i++) {
+		jsmntok_t *t = &toks[i];
+
+		if (t->type != JSMN_STRING)
+			continue;
+
+		if (i++ == n)
+			goto fail;
+
+		if (json_token_streq(json, t, "container")) {
+			if (toks[i].type != JSMN_STRING)
+				goto fail;
+			killer->id = strdup(json_token_str(json, &toks[i]));
+		} else if (json_token_streq(json, t, "signal")) {
+			if (toks[i].type != JSMN_PRIMITIVE)
+				goto fail;
+			killer->signal = json_token_int(json, &toks[i]);
+		} else {
+			fprintf(stderr, "get unknown section %s in kill container\n",
+				json_token_str(json, t));
+			goto fail;
+		}
+	}
+
+	ret = 0;
+out:
+	free(toks);
+	return ret;
+fail:
+	free(killer->id);
+	killer->id = NULL;
+	goto out;
+}
+
 int hyper_parse_winsize(struct hyper_win_size *ws, char *json, int length)
 {
 	int i, n, ret = -1;

src/parse.h

@@ -9,6 +9,7 @@ struct hyper_exec *hyper_parse_execcmd(char *json, int length);
 char *json_token_str(char *js, jsmntok_t *t);
 int json_token_streq(char *js, jsmntok_t *t, char *s);
 int hyper_parse_winsize(struct hyper_win_size *ws, char *json, int length);
+int hyper_parse_kill_container(struct hyper_killer *killer, char *json, int length);
 int hyper_parse_write_file(struct hyper_writter *writter, char *json, int length);
 int hyper_parse_read_file(struct hyper_reader *reader, char *json, int length);
 struct hyper_container *hyper_parse_new_container(struct hyper_pod *pod, char *json, int length);