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cmd_results_to_json: return copied string and properly free the json

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The only user of this function would copy the string right away
to get rid of the const flag anyway, and freeing a const string
afterwards might work but is not meant to be done according to the
json-c API.
This commit is contained in:
Dominique Martinet 2018-07-05 07:07:59 +09:00
parent 9314c45c41
commit fe72e3b349
3 changed files with 8 additions and 9 deletions
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2
include/sway/commands.h
View file

@ -79,7 +79,7 @@ void free_cmd_results(struct cmd_results *results);
* *
* Free the JSON string later on. * Free the JSON string later on.
*/ */
const char *cmd_results_to_json(struct cmd_results *results); char *cmd_results_to_json(struct cmd_results *results);
struct cmd_results *add_color(const char *name, struct cmd_results *add_color(const char *name,
char *buffer, const char *color); char *buffer, const char *color);

8
sway/commands.c
View file

@ -527,7 +527,7 @@ void free_cmd_results(struct cmd_results *results) {
free(results); free(results);
} }
const char *cmd_results_to_json(struct cmd_results *results) { char *cmd_results_to_json(struct cmd_results *results) {
json_object *result_array = json_object_new_array(); json_object *result_array = json_object_new_array();
json_object *root = json_object_new_object(); json_object *root = json_object_new_object();
json_object_object_add(root, "success", json_object_object_add(root, "success",
@ -542,9 +542,9 @@ const char *cmd_results_to_json(struct cmd_results *results) {
} }
json_object_array_add(result_array, root); json_object_array_add(result_array, root);
const char *json = json_object_to_json_string(result_array); const char *json = json_object_to_json_string(result_array);
free(result_array); char *res = strdup(json);
free(root); json_object_put(result_array);
return json; return res;
} }
/** /**

7
sway/ipc-server.c
View file

@ -481,11 +481,10 @@ void ipc_client_handle_command(struct ipc_client *client) {
case IPC_COMMAND: case IPC_COMMAND:
{ {
struct cmd_results *results = execute_command(buf, NULL); struct cmd_results *results = execute_command(buf, NULL);
const char *json = cmd_results_to_json(results); char *json = cmd_results_to_json(results);
char reply[256]; int length = strlen(json);
int length = snprintf(reply, sizeof(reply), "%s", json); client_valid = ipc_send_reply(client, json, (uint32_t)length);
free(json); free(json);
client_valid = ipc_send_reply(client, reply, (uint32_t)length);
free_cmd_results(results); free_cmd_results(results);
goto exit_cleanup; goto exit_cleanup;
} }