я реализовал класс TerminalReader некоторое время назад в Cinnamon апплета: https://github.com/lestcape/Configurable-Menu/blob/OwnAPI/configurableMenu%40lestcape/pakagesManager.js#L31
Этот класс теперь используется в других местах также, поэтому у вас есть больше примеров, чтобы underestand лучше : https://github.com/search?l=JavaScript&q=TerminalReader&type=Code&utf8=%E2%9C%93
Вот исходный код класса:
function TerminalReader() {
this._init.apply(this, arguments);
}
TerminalReader.prototype = {
_init: function(command, callback) {
this._callbackPipe = callback;
this._commandPipe = command;
this.idle = true;
this._childWatch = null;
},
executeReader: function() {
if(this.idle) {
this.idle = false;
try {
let [success, argv] = GLib.shell_parse_argv("sh -c '" + this._commandPipe + "'");
if(success) {
let [exit, pid, stdin, stdout, stderr] =
GLib.spawn_async_with_pipes(
null, // cwd
argv, // args
null, // env
GLib.SpawnFlags.SEARCH_PATH | GLib.SpawnFlags.DO_NOT_REAP_CHILD, //Use env path and no repet
null // child_setup
);
this._childPid = pid;
this._stdin = new Gio.UnixOutputStream({ fd: stdin, close_fd: true });
this._stdout = new Gio.UnixInputStream({ fd: stdout, close_fd: true });
this._stderr = new Gio.UnixInputStream({ fd: stderr, close_fd: true });
// We need this one too, even if don't actually care of what the process
// has to say on stderr, because otherwise the fd opened by g_spawn_async_with_pipes
// is kept open indefinitely
this._stderrStream = new Gio.DataInputStream({ base_stream: this._stderr });
this._dataStdout = new Gio.DataInputStream({ base_stream: this._stdout });
this._cancellableStderrStream = new Gio.Cancellable();
this._cancellableStdout = new Gio.Cancellable();
this.resOut = 1;
this._readStdout();
this.resErr = 1;
this._readStderror();
this._childWatch = GLib.child_watch_add(GLib.PRIORITY_DEFAULT, pid, Lang.bind(this, function(pid, status, requestObj) {
GLib.source_remove(this._childWatch);
this._childWatch = null;
this._stdin.close(null);
this.idle = true;
}));
}
//throw
} catch(err) {
if(err.code == GLib.SpawnError.G_SPAWN_ERROR_NOENT) {
err.message = _("Command not found.");
} else {
// The exception from gjs contains an error string like:
// Error invoking GLib.spawn_command_line_async: Failed to
// execute child process "foo" (No such file or directory)
// We are only interested in the part in the parentheses. (And
// we can't pattern match the text, since it gets localized.)
err.message = err.message.replace(/.*\((.+)\)/, '$1');
}
throw err;
}
}
},
destroy: function() {
try {
if(this._childWatch) {
GLib.source_remove(this._childWatch);
this._childWatch = null;
}
if(!this._dataStdout.is_closed()) {
this._cancellableStdout.cancel();
this._stdout.close_async(0, null, Lang.bind(this, this.closeStdout));
}
if(!this._stderrStream.is_closed()) {
this._cancellableStderrStream.cancel();
this._stderrStream.close_async(0, null, Lang.bind(this, this.closeStderrStream));
}
this._stdin.close(null);
this.idle = true;
}
catch(e) {
Main.notify("Error on close" + this._dataStdout.is_closed(), e.message);
}
},
closeStderrStream: function(std, result) {
try {
std.close_finish(result);
} catch(e) {
std.close_async(0, null, Lang.bind(this, this.closeStderrStream));
}
},
closeStdout: function(std, result) {
try {
std.close_finish(result);
} catch(e) {
std.close_async(0, null, Lang.bind(this, this.closeStderrStream));
}
},
_readStdout: function() {
this._dataStdout.fill_async(-1, GLib.PRIORITY_DEFAULT, this._cancellableStdout, Lang.bind(this, function(stream, result) {
try {
if(!this._dataStdout.is_closed()) {
if(this.resOut != -1)
this.resOut = this._dataStdout.fill_finish(result);// end of file
if(this.resOut == 0) {
let val = stream.peek_buffer().toString();
if(val != "")
this._callbackPipe(this._commandPipe, true, val);
this._stdout.close(this._cancellableStdout);
} else {
// Try to read more
this._dataStdout.set_buffer_size(2 * this._dataStdout.get_buffer_size());
this._readStdout();
}
}
} catch(e) {
global.log(e.toString());
}
}));
},
_readStderror: function() {
this._stderrStream.fill_async(-1, GLib.PRIORITY_DEFAULT, this._cancellableStderrStream, Lang.bind(this, function(stream, result) {
try {
if(!this._stderrStream.is_closed()) {
if(this.resErr != -1)
this.resErr = this._stderrStream.fill_finish(result);
if(this.resErr == 0) { // end of file
let val = stream.peek_buffer().toString();
if(val != "")
this._callbackPipe(this._commandPipe, false, val);
this._stderr.close(null);
} else {
this._stderrStream.set_buffer_size(2 * this._stderrStream.get_buffer_size());
this._readStderror();
}
}
} catch(e) {
global.log(e.toString());
}
}));
}
};
Может включать ссылку на 'spawn_async_with_pipes' документации? Пробовал без запятых '['/ usr/bin/xrandr --query | awk ... '] '? – guest271314
[Doc is there] (https://people.gnome.org/~gcampagna/docs/GLib-2.0/GLib.spawn_async_with_pipes.html) Без запятых это вообще не работает. –
Почему бы не поместить все ваши трубы в сценарий bash, а затем использовать скрипт bash напрямую? – tucuxi