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));
191 if (this.cfg.debug) {
192 print("PID: " + this.pid);
195 ChildWatch.add (this.pid, (w_pid, result) => {
197 this.result = result;
199 print("child_watch_add : result: " + result);
202 this.read(this.out_ch);
203 this.read(this.err_ch);
206 Process.close_pid(this.pid);
212 //print("DONE TIDYUP");
213 if (this.cfg.finish) {
214 this.cfg.finish(this, this.result);
218 // Triggered when the child indicated by child_pid exits
219 Process.close_pid (w_pid);
223 GLib.child_watch_add(GLib.PRIORITY_DEFAULT, this.pid, function(pid, result) {
229 GLib.spawn_close_pid(_this.pid); // hopefully kills it..
232 if (_this.in_ch) _this.in_ch.close();
233 if (_this.out_ch) _this.out_ch.close();
234 if (_this.err_ch) _this.err_ch.close();
235 // blank out channels
237 _this.err_ch = false;
238 _this.out_ch = false;
239 // rmeove listeners !! important otherwise we kill the CPU
240 if (err_src !== false) GLib.source_remove(err_src);
241 if (out_src !== false) GLib.source_remove(out_src);
248 this.in_ch = new GLib.IOChannel.unix_new(ret.standard_input);
249 this.out_ch = new GLib.IOChannel.unix_new(ret.standard_output);
250 this.err_ch = new GLib.IOChannel.unix_new(ret.standard_error);
252 // make everything non-blocking!
256 // using NONBLOCKING only works if io_add_watch
257 //returns true/false in right conditions
258 this.in_ch.set_flags (GLib.IOFlags.NONBLOCK);
259 this.out_ch.set_flags (GLib.IOFlags.NONBLOCK);
260 this.err_ch.set_flags (GLib.IOFlags.NONBLOCK);
264 // add handlers for output and stderr.
265 out_src= GLib.io_add_watch(this.out_ch, GLib.PRIORITY_DEFAULT,
266 GLib.IOCondition.OUT + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.HUP + GLib.IOCondition.ERR,
269 return _this.read(_this.out_ch);
273 err_src= GLib.io_add_watch(this.err_ch, GLib.PRIORITY_DEFAULT,
274 GLib.IOCondition.ERR + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.OUT + GLib.IOCondition.HUP,
277 return _this.read(_this.err_ch);
284 if (this.pid !== false) {
285 // child can exit before 1we get this far..
286 if (this.listeners.input) {
287 print("Trying to call listeners");
289 this.write(this.listeners.input.call(this));
290 // this probably needs to be a bit smarter...
291 //but... let's close input now..
307 // async - if running - return..
308 if (this.async && this.pid) {
312 // start mainloop if not async..
314 if (this.pid !== false) {
316 print("starting main loop");
319 this.ctx = isSeed ? new GLib.MainLoop.c_new (null, false) : GLib.MainLoop.new (null, false);;
320 this.ctx.run(false); // wait fore exit?
322 //print("main_loop done!");
324 tidyup(); // tidyup get's called in main loop.
327 if (this.exceptions && this.result != 0) {
328 this.toString = function() { return this.stderr; };
329 throw this; // we throw self...
332 // finally throw, or return self..
338 * write to stdin of process
339 * @arg str {String} string to write to stdin of process
340 * @returns GLib.IOStatus (0 == error, 1= NORMAL)
342 write : function(str) // write a line to
345 return 0; // input is closed
347 //print("write: " + str);
348 // NEEDS GIR FIX! for return value.. let's ignore for the time being..
350 //var res = this.in_ch.write_chars(str, str.length, ret);
351 var res = this.in_ch.write_chars(str, str.length);
353 //print("write_char retunred:" + JSON.stringify(res) + ' ' +JSON.stringify(ret) );
355 if (res != GLib.IOStatus.NORMAL) {
356 throw "Write failed";
364 * read from pipe and call appropriate listerner and add to output or stderr string.
365 * @arg giochannel to read from.
370 var prop = ch == this.out_ch ? 'output' : 'stderr';
371 // print("prop: " + prop);
375 //print(JSON.stringify(ch, null,4));
379 var status = ch.read_line( x);
380 // print('status: ' +JSON.stringify(status));
381 // print(JSON.stringify(x));
383 case GLib.IOStatus.NORMAL:
386 if (this.listeners[prop]) {
387 this.listeners[prop].call(this, x.str_return);
389 _this[prop] += x.str_return;
391 print(prop + ':' + x.str_return.replace(/\n/, ''));
395 if (imports.gi.Gtk.events_pending()) {
396 imports.gi.Gtk.main_iteration();
403 //this.ctx.iteration(true);
405 case GLib.IOStatus.AGAIN:
406 //print("Should be called again.. waiting for more data..");
409 case GLib.IOStatus.ERROR:
410 case GLib.IOStatus.EOF:
418 //print("RETURNING");
419 return false; // allow it to be called again..
426 * simple run a process - returns result, or throws stderr result...
427 * @param cfg {Object} see spawn
428 * @return {string} stdout output.
431 cfg.exceptions = true;
433 var s = new Spawn(cfg);
441 args: ['ls', '/tmp'],
444 } catch (e) { print(JSON.stringify(e)); }
446 var secs = (new Date()).getSeconds()
450 args: ['/bin/touch', '/tmp/spawntest-' + secs ],
453 } catch (e) { print( 'Error: ' + JSON.stringify(e)); }