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;
160 * Run the configured command.
161 * result is applied to object properties (eg. 'output' or 'stderr')
162 * @returns {Object} self.
164 public run : function()
177 if (this.cfg.debug) {
178 print("cd " + this.cfg.cwd +";" + string.joinv(" ", this.cfg.args));
181 Process.spawn_async_with_pipes (
185 SpawnFlags.SEARCH_PATH | SpawnFlags.DO_NOT_REAP_CHILD,
195 //print(JSON.stringify(gret));
197 if (this.cfg.debug) {
198 print("PID: " + this.pid);
201 ChildWatch.add (this.pid, (w_pid, result) => {
203 this.result = result;
205 print("child_watch_add : result: " + result);
208 this.read(this.out_ch);
209 this.read(this.err_ch);
212 Process.close_pid(this.pid);
218 //print("DONE TIDYUP");
219 if (this.cfg.finish) {
220 this.cfg.finish(this.result);
227 this.in_ch = new GLib.IOChannel.unix_new(ret.standard_input);
228 this.out_ch = new GLib.IOChannel.unix_new(ret.standard_output);
229 this.err_ch = new GLib.IOChannel.unix_new(ret.standard_error);
231 // make everything non-blocking!
235 // using NONBLOCKING only works if io_add_watch
236 //returns true/false in right conditions
237 this.in_ch.set_flags (GLib.IOFlags.NONBLOCK);
238 this.out_ch.set_flags (GLib.IOFlags.NONBLOCK);
239 this.err_ch.set_flags (GLib.IOFlags.NONBLOCK);
243 // add handlers for output and stderr.
244 out_src= GLib.io_add_watch(this.out_ch, GLib.PRIORITY_DEFAULT,
245 GLib.IOCondition.OUT + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.HUP + GLib.IOCondition.ERR,
248 return _this.read(_this.out_ch);
252 err_src= GLib.io_add_watch(this.err_ch, GLib.PRIORITY_DEFAULT,
253 GLib.IOCondition.ERR + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.OUT + GLib.IOCondition.HUP,
256 return _this.read(_this.err_ch);
263 if (this.pid !== false) {
264 // child can exit before 1we get this far..
265 if (this.listeners.input) {
266 print("Trying to call listeners");
268 this.write(this.listeners.input.call(this));
269 // this probably needs to be a bit smarter...
270 //but... let's close input now..
286 // async - if running - return..
287 if (this.async && this.pid) {
291 // start mainloop if not async..
293 if (this.pid !== false) {
295 print("starting main loop");
298 this.ctx = isSeed ? new GLib.MainLoop.c_new (null, false) : GLib.MainLoop.new (null, false);;
299 this.ctx.run(false); // wait fore exit?
301 //print("main_loop done!");
303 tidyup(); // tidyup get's called in main loop.
306 if (this.exceptions && this.result != 0) {
307 this.toString = function() { return this.stderr; };
308 throw this; // we throw self...
311 // finally throw, or return self..
319 private void tidyup()
322 Process.close_pid(this.pid); // hopefully kills it..
325 if (this.in_ch) this.in_ch.close();
326 if (this.out_ch) this.out_ch.close();
327 if (this.err_ch) this.err_ch.close();
328 // blank out channels
332 // rmeove listeners !! important otherwise we kill the CPU
333 if (this.err_src !== false) GLib.source_remove(this.err_src);
334 if (this.out_src !== false) GLib.source_remove(this.out_src);
335 this.err_src = false;
336 this.out_src = false;
342 * write to stdin of process
343 * @arg str {String} string to write to stdin of process
344 * @returns GLib.IOStatus (0 == error, 1= NORMAL)
346 write : function(str) // write a line to
349 return 0; // input is closed
351 //print("write: " + str);
352 // NEEDS GIR FIX! for return value.. let's ignore for the time being..
354 //var res = this.in_ch.write_chars(str, str.length, ret);
355 var res = this.in_ch.write_chars(str, str.length);
357 //print("write_char retunred:" + JSON.stringify(res) + ' ' +JSON.stringify(ret) );
359 if (res != GLib.IOStatus.NORMAL) {
360 throw "Write failed";
368 * read from pipe and call appropriate listerner and add to output or stderr string.
369 * @arg giochannel to read from.
374 var prop = ch == this.out_ch ? 'output' : 'stderr';
375 // print("prop: " + prop);
379 //print(JSON.stringify(ch, null,4));
383 var status = ch.read_line( x);
384 // print('status: ' +JSON.stringify(status));
385 // print(JSON.stringify(x));
387 case GLib.IOStatus.NORMAL:
390 if (this.listeners[prop]) {
391 this.listeners[prop].call(this, x.str_return);
393 _this[prop] += x.str_return;
395 print(prop + ':' + x.str_return.replace(/\n/, ''));
399 if (imports.gi.Gtk.events_pending()) {
400 imports.gi.Gtk.main_iteration();
407 //this.ctx.iteration(true);
409 case GLib.IOStatus.AGAIN:
410 //print("Should be called again.. waiting for more data..");
413 case GLib.IOStatus.ERROR:
414 case GLib.IOStatus.EOF:
422 //print("RETURNING");
423 return false; // allow it to be called again..
430 * simple run a process - returns result, or throws stderr result...
431 * @param cfg {Object} see spawn
432 * @return {string} stdout output.
435 cfg.exceptions = true;
437 var s = new Spawn(cfg);
445 args: ['ls', '/tmp'],
448 } catch (e) { print(JSON.stringify(e)); }
450 var secs = (new Date()).getSeconds()
454 args: ['/bin/touch', '/tmp/spawntest-' + secs ],
457 } catch (e) { print( 'Error: ' + JSON.stringify(e)); }