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pactl: Implement list message-handlers

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For better readability, "pactl list message-handlers" is introduced which
prints a formatted output of "pactl send-message /core list-handlers".

The patch also adds the functions pa_message_params_read_raw() and
pa_message_params_read_string() for easy parsing of the message response
string. Because the functions need to modify the parameter string,
the message handler and the pa_context_string_callback function now
receive a char* instead of a const char* as parameter argument.

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/51>
This commit is contained in:
Georg Chini 2020-01-14 11:31:39 +01:00 • committed by Tanu Kaskinen
parent 5c0ab52145
commit 4a28b164d1
15 changed files with 253 additions and 12 deletions
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9
src/pulsecore/message-handler.c
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@ -90,6 +90,8 @@ void pa_message_handler_unregister(pa_core *c, const char *object_path) {
/* Send a message to an object identified by object_path */
int pa_message_handler_send_message(pa_core *c, const char *object_path, const char *message, const char *message_parameters, char **response) {
struct pa_message_handler *handler;
int ret;
char *parameter_copy;
pa_assert(c);
pa_assert(object_path);
@ -101,9 +103,14 @@ int pa_message_handler_send_message(pa_core *c, const char *object_path, const c
if (!(handler = pa_hashmap_get(c->message_handlers, object_path)))
return -PA_ERR_NOENTITY;
parameter_copy = pa_xstrdup(message_parameters);
/* The handler is expected to return an error code and may also
return an error string in response */
return handler->callback(handler->object_path, message, message_parameters, response, handler->userdata);
ret = handler->callback(handler->object_path, message, parameter_copy, response, handler->userdata);
pa_xfree(parameter_copy);
return ret;
}
/* Set handler description */