3 using Gee; // for array list?
5 static int main (string[] args) {
6 // A reference to our file
7 var file = File.new_for_path ("data.txt");
13 var Gio = imports.gi.Gio;
14 var GLib = imports.gi.GLib;
20 * Library to wrap GLib.spawn_async_with_pipes
24 * Spawn = import.Spawn;
27 * var output = Spawn.run({
29 * args : [ 'ls', '-l' ],
30 * env : [], // optional
32 output : function (line) { Seed.print(line); },
33 * stderr : function (line) {Seed.print("ERROR" + line); },
34 * input : function() { return 'xxx' },
42 *var output = Spawn.run( SpawnConfig() {
43 cwd = "/home", // empty string to default to homedirectory.
46 ouput = (line) => { stdout.printf("%d\n", line); }
47 stderr = (line) => { stdout.printf("%d\n", line); }
48 input = () => { return "xxx"; }
53 delegate void SpawnOutput(string line);
54 delegate void SpawnErr(string line);
55 delegate string SpawnInput();
65 public boolean exceptions; // fire exceptions.
66 public boolean debug; // fire exceptions.
68 public SpawnOutput output
69 public SpawnErr stderr;
70 public SpawnInput input;
72 public SpawnConfig() {
85 * @param cfg {SpawnConfig} settings - see properties.
87 * @arg cwd {String} working directory. (defaults to home directory)
88 * @arg args {Array} arguments eg. [ 'ls', '-l' ]
89 * @arg listeners {Object} (optional) handlers for output, stderr, input
90 * stderr/output both receive output line as argument
91 * input should return any standard input
92 * finish recieves result as argument.
93 * @arg env {Array} enviroment eg. [ 'GITDIR=/home/test' ]
94 * @arg async {Boolean} (optional)return instantly, or wait for exit. (default no)
95 * @arg exceptions {Boolean} throw exception on failure (default no)
96 * @arg debug {Boolean} print out what's going on.. (default no)
101 public class Spawn : Object
106 public Spawn(SpawnConfig cfg)
113 this.cwd = this.cfg.cwd.length || GLib.get_home_dir();
114 if (!this.cfg.args.length) {
115 throw "No arguments";
121 boolean ctx = false; // the mainloop ctx.
124 * @property output {String} resulting output
128 * @property stderr {String} resulting output from stderr
132 * @property result {Number} execution result.
136 * @property pid {Number} pid of child process (of false if it's not running)
140 * @property in_ch {GLib.IOChannel} input io channel
142 IOChannel in_ch = null;
144 * @property out_ch {GLib.IOChannel} output io channel
146 IOChannel out_ch = null;
148 * @property err_ch {GLib.IOChannel} stderr io channel
150 IOChannel err_ch = null;
154 * Run the configured command.
155 * result is applied to object properties (eg. 'output' or 'stderr')
156 * @returns {Object} self.
158 public run : function()
171 if (this.cfg.debug) {
172 print("cd " + this.cfg.cwd +";" + string.joinv(" ", this.cfg.args));
175 Process.spawn_async_with_pipes (
179 SpawnFlags.SEARCH_PATH | SpawnFlags.DO_NOT_REAP_CHILD,
189 //print(JSON.stringify(gret));
190 this.pid = ret.child_pid;
193 print("PID: " + this.pid);
198 GLib.child_watch_add(GLib.PRIORITY_DEFAULT, this.pid, function(pid, result) {
199 _this.result = result;
201 print("child_watch_add : result: " + result);
203 _this.read(_this.out_ch);
204 _this.read(_this.err_ch);
207 GLib.spawn_close_pid(_this.pid);
213 //print("DONE TIDYUP");
214 if (_this.listeners.finish) {
215 _this.listeners.finish.call(this, _this.result);
222 GLib.spawn_close_pid(_this.pid); // hopefully kills it..
225 if (_this.in_ch) _this.in_ch.close();
226 if (_this.out_ch) _this.out_ch.close();
227 if (_this.err_ch) _this.err_ch.close();
228 // blank out channels
230 _this.err_ch = false;
231 _this.out_ch = false;
232 // rmeove listeners !! important otherwise we kill the CPU
233 if (err_src !== false) GLib.source_remove(err_src);
234 if (out_src !== false) GLib.source_remove(out_src);
241 this.in_ch = new GLib.IOChannel.unix_new(ret.standard_input);
242 this.out_ch = new GLib.IOChannel.unix_new(ret.standard_output);
243 this.err_ch = new GLib.IOChannel.unix_new(ret.standard_error);
245 // make everything non-blocking!
249 // using NONBLOCKING only works if io_add_watch
250 //returns true/false in right conditions
251 this.in_ch.set_flags (GLib.IOFlags.NONBLOCK);
252 this.out_ch.set_flags (GLib.IOFlags.NONBLOCK);
253 this.err_ch.set_flags (GLib.IOFlags.NONBLOCK);
257 // add handlers for output and stderr.
258 out_src= GLib.io_add_watch(this.out_ch, GLib.PRIORITY_DEFAULT,
259 GLib.IOCondition.OUT + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.HUP + GLib.IOCondition.ERR,
262 return _this.read(_this.out_ch);
266 err_src= GLib.io_add_watch(this.err_ch, GLib.PRIORITY_DEFAULT,
267 GLib.IOCondition.ERR + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.OUT + GLib.IOCondition.HUP,
270 return _this.read(_this.err_ch);
277 if (this.pid !== false) {
278 // child can exit before 1we get this far..
279 if (this.listeners.input) {
280 print("Trying to call listeners");
282 this.write(this.listeners.input.call(this));
283 // this probably needs to be a bit smarter...
284 //but... let's close input now..
300 // async - if running - return..
301 if (this.async && this.pid) {
305 // start mainloop if not async..
307 if (this.pid !== false) {
309 print("starting main loop");
312 this.ctx = isSeed ? new GLib.MainLoop.c_new (null, false) : GLib.MainLoop.new (null, false);;
313 this.ctx.run(false); // wait fore exit?
315 //print("main_loop done!");
317 tidyup(); // tidyup get's called in main loop.
320 if (this.exceptions && this.result != 0) {
321 this.toString = function() { return this.stderr; };
322 throw this; // we throw self...
325 // finally throw, or return self..
331 * write to stdin of process
332 * @arg str {String} string to write to stdin of process
333 * @returns GLib.IOStatus (0 == error, 1= NORMAL)
335 write : function(str) // write a line to
338 return 0; // input is closed
340 //print("write: " + str);
341 // NEEDS GIR FIX! for return value.. let's ignore for the time being..
343 //var res = this.in_ch.write_chars(str, str.length, ret);
344 var res = this.in_ch.write_chars(str, str.length);
346 //print("write_char retunred:" + JSON.stringify(res) + ' ' +JSON.stringify(ret) );
348 if (res != GLib.IOStatus.NORMAL) {
349 throw "Write failed";
357 * read from pipe and call appropriate listerner and add to output or stderr string.
358 * @arg giochannel to read from.
363 var prop = ch == this.out_ch ? 'output' : 'stderr';
364 // print("prop: " + prop);
368 //print(JSON.stringify(ch, null,4));
372 var status = ch.read_line( x);
373 // print('status: ' +JSON.stringify(status));
374 // print(JSON.stringify(x));
376 case GLib.IOStatus.NORMAL:
379 if (this.listeners[prop]) {
380 this.listeners[prop].call(this, x.str_return);
382 _this[prop] += x.str_return;
384 print(prop + ':' + x.str_return.replace(/\n/, ''));
388 if (imports.gi.Gtk.events_pending()) {
389 imports.gi.Gtk.main_iteration();
396 //this.ctx.iteration(true);
398 case GLib.IOStatus.AGAIN:
399 //print("Should be called again.. waiting for more data..");
402 case GLib.IOStatus.ERROR:
403 case GLib.IOStatus.EOF:
411 //print("RETURNING");
412 return false; // allow it to be called again..
419 * simple run a process - returns result, or throws stderr result...
420 * @param cfg {Object} see spawn
421 * @return {string} stdout output.
424 cfg.exceptions = true;
426 var s = new Spawn(cfg);
434 args: ['ls', '/tmp'],
437 } catch (e) { print(JSON.stringify(e)); }
439 var secs = (new Date()).getSeconds()
443 args: ['/bin/touch', '/tmp/spawntest-' + secs ],
446 } catch (e) { print( 'Error: ' + JSON.stringify(e)); }