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#include <ccan/tal/path/path.h>
#include <common/json_command.h>
#include <common/jsonrpc_errors.h>
#include <common/param.h>
#include <dirent.h>
#include <errno.h>
#include <lightningd/plugin_control.h>
#include <lightningd/plugin_hook.h>
#include <unistd.h>
/**
* A plugin command which permits to control plugins without restarting
* lightningd. It takes a subcommand, and an optional subcommand parameter.
*/
static struct command_result *json_plugin_control(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
const char *subcmd;
subcmd = param_subcommand(cmd, buffer, params,
"start", "stop", "startdir", "rescan", "list", NULL);
if (!subcmd)
return command_param_failed();
struct plugin *p;
struct json_stream *response;
if (streq(subcmd, "stop")) {
const char *plugin_name;
bool plugin_found;
if (!param(cmd, buffer, params,
p_req("subcommand", param_ignore, cmd),
p_req("plugin", param_string, &plugin_name),
NULL))
return command_param_failed();
plugin_found = false;
list_for_each(&cmd->ld->plugins->plugins, p, list) {
if (plugin_paths_match(p->cmd, plugin_name)) {
if (!p->dynamic)
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"%s plugin cannot be managed when lightningd is up",
plugin_name);
plugin_found = true;
plugin_hook_unregister_all(p);
plugin_kill(p, "%s stopped by lightningd via RPC",
plugin_name);
break;
}
}
if (!plugin_found)
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"Could not find plugin %s", plugin_name);
} else if (streq(subcmd, "start")) {
const char *plugin_path;
if (!param(cmd, buffer, params,
p_req("subcommand", param_ignore, cmd),
p_req("plugin", param_string, &plugin_path),
NULL))
return command_param_failed();
if (access(plugin_path, X_OK) == 0)
plugin_register(cmd->ld->plugins, plugin_path);
else
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"%s is not executable: %s",
plugin_path, strerror(errno));
} else if (streq(subcmd, "startdir")) {
const char *dir_path;
if (!param(cmd, buffer, params,
p_req("subcommand", param_ignore, cmd),
p_req("directory", param_string, &dir_path),
NULL))
return command_param_failed();
if (access(dir_path, F_OK) == 0)
add_plugin_dir(cmd->ld->plugins, dir_path, true);
else
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"Could not open %s", dir_path);
} else if (streq(subcmd, "rescan")) {
if (!param(cmd, buffer, params,
p_req("subcommand", param_ignore, cmd),
NULL))
return command_param_failed();
plugins_add_default_dir(cmd->ld->plugins,
path_join(tmpctx, cmd->ld->config_dir, "plugins"));
} else if (streq(subcmd, "list")) {
if (!param(cmd, buffer, params,
p_req("subcommand", param_ignore, cmd),
NULL))
return command_param_failed();
/* Don't do anything as we return the plugin list anyway */
}
/* The config function is called once we got the manifest,
* in 'plugin_manifest_cb'.*/
plugins_start(cmd->ld->plugins, cmd->ld->dev_debug_subprocess);
response = json_stream_success(cmd);
json_array_start(response, "plugins");
list_for_each(&cmd->ld->plugins->plugins, p, list) {
json_object_start(response, NULL);
json_add_string(response, "name", p->cmd);
json_add_bool(response, "active",
p->plugin_state == CONFIGURED);
json_object_end(response);
}
json_array_end(response);
return command_success(cmd, response);
}
static const struct json_command plugin_control_command = {
"plugin",
"plugin",
json_plugin_control,
"Control plugins (start, stop, startdir, rescan, list)",
.verbose = "Usage :\n"
"plugin start /path/to/a/plugin\n"
" adds a new plugin to c-lightning\n"
"plugin stop plugin_name\n"
" stops an already registered plugin\n"
"plugin startdir /path/to/a/plugin_dir/\n"
" adds a new plugin directory\n"
"plugin rescan\n"
" loads not-already-loaded plugins from the default plugins dir\n"
"plugin list\n"
" lists all active plugins\n"
"\n"
};
AUTODATA(json_command, &plugin_control_command);