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;
152 * @property err_src {int} the watch for errors
157 * @property err_src {int} the watch for output
164 * Run the configured command.
165 * result is applied to object properties (eg. 'output' or 'stderr')
166 * @returns {Object} self.
168 public run : function()
181 if (this.cfg.debug) {
182 print("cd " + this.cfg.cwd +";" + string.joinv(" ", this.cfg.args));
185 Process.spawn_async_with_pipes (
189 SpawnFlags.SEARCH_PATH | SpawnFlags.DO_NOT_REAP_CHILD,
199 //print(JSON.stringify(gret));
201 if (this.cfg.debug) {
202 print("PID: " + this.pid);
205 ChildWatch.add (this.pid, (w_pid, result) => {
207 this.result = result;
209 print("child_watch_add : result: " + result);
212 this.read(this.out_ch);
213 this.read(this.err_ch);
216 Process.close_pid(this.pid);
222 //print("DONE TIDYUP");
223 if (this.cfg.finish) {
224 this.cfg.finish(this.result);
231 this.in_ch = new GLib.IOChannel.unix_new(ret.standard_input);
232 this.out_ch = new GLib.IOChannel.unix_new(ret.standard_output);
233 this.err_ch = new GLib.IOChannel.unix_new(ret.standard_error);
235 // make everything non-blocking!
239 // using NONBLOCKING only works if io_add_watch
240 //returns true/false in right conditions
241 this.in_ch.set_flags (GLib.IOFlags.NONBLOCK);
242 this.out_ch.set_flags (GLib.IOFlags.NONBLOCK);
243 this.err_ch.set_flags (GLib.IOFlags.NONBLOCK);
247 // add handlers for output and stderr.
249 this.out_src = this.out_ch.add_watch (
250 IOCondition.OUT | IOCondition.IN | IOCondition.PRI | IOCondition.HUP | IOCondition.ERR ,
251 (channel, condition) => {
252 return this.read(_this.out_ch);
255 this.err_src = this.err_ch.add_watch (
256 IOCondition.OUT | IOCondition.IN | IOCondition.PRI | IOCondition.HUP | IOCondition.ERR ,
257 (channel, condition) => {
258 return this.read(_this.err_ch);
265 // child can exit before 1we get this far..
266 if (this.listeners.input) {
267 print("Trying to call listeners");
269 this.write(this.listeners.input.call(this));
270 // this probably needs to be a bit smarter...
271 //but... let's close input now..
287 // async - if running - return..
288 if (this.async && this.pid) {
292 // start mainloop if not async..
294 if (this.pid !== false) {
296 print("starting main loop");
299 this.ctx = isSeed ? new GLib.MainLoop.c_new (null, false) : GLib.MainLoop.new (null, false);;
300 this.ctx.run(false); // wait fore exit?
302 //print("main_loop done!");
304 tidyup(); // tidyup get's called in main loop.
307 if (this.exceptions && this.result != 0) {
308 this.toString = function() { return this.stderr; };
309 throw this; // we throw self...
312 // finally throw, or return self..
320 private void tidyup()
323 Process.close_pid(this.pid); // hopefully kills it..
326 if (this.in_ch) this.in_ch.close();
327 if (this.out_ch) this.out_ch.close();
328 if (this.err_ch) this.err_ch.close();
329 // blank out channels
333 // rmeove listeners !! important otherwise we kill the CPU
334 if (this.err_src !== false) GLib.source_remove(this.err_src);
335 if (this.out_src !== false) GLib.source_remove(this.out_src);
336 this.err_src = false;
337 this.out_src = false;
343 * write to stdin of process
344 * @arg str {String} string to write to stdin of process
345 * @returns GLib.IOStatus (0 == error, 1= NORMAL)
347 write : function(str) // write a line to
350 return 0; // input is closed
352 //print("write: " + str);
353 // NEEDS GIR FIX! for return value.. let's ignore for the time being..
355 //var res = this.in_ch.write_chars(str, str.length, ret);
356 var res = this.in_ch.write_chars(str, str.length);
358 //print("write_char retunred:" + JSON.stringify(res) + ' ' +JSON.stringify(ret) );
360 if (res != GLib.IOStatus.NORMAL) {
361 throw "Write failed";
369 * read from pipe and call appropriate listerner and add to output or stderr string.
370 * @arg giochannel to read from.
375 var prop = ch == this.out_ch ? 'output' : 'stderr';
376 // print("prop: " + prop);
380 //print(JSON.stringify(ch, null,4));
384 var status = ch.read_line( x);
385 // print('status: ' +JSON.stringify(status));
386 // print(JSON.stringify(x));
388 case GLib.IOStatus.NORMAL:
391 if (this.listeners[prop]) {
392 this.listeners[prop].call(this, x.str_return);
394 _this[prop] += x.str_return;
396 print(prop + ':' + x.str_return.replace(/\n/, ''));
400 if (imports.gi.Gtk.events_pending()) {
401 imports.gi.Gtk.main_iteration();
408 //this.ctx.iteration(true);
410 case GLib.IOStatus.AGAIN:
411 //print("Should be called again.. waiting for more data..");
414 case GLib.IOStatus.ERROR:
415 case GLib.IOStatus.EOF:
423 //print("RETURNING");
424 return false; // allow it to be called again..
431 * simple run a process - returns result, or throws stderr result...
432 * @param cfg {Object} see spawn
433 * @return {string} stdout output.
436 cfg.exceptions = true;
438 var s = new Spawn(cfg);
446 args: ['ls', '/tmp'],
449 } catch (e) { print(JSON.stringify(e)); }
451 var secs = (new Date()).getSeconds()
455 args: ['/bin/touch', '/tmp/spawntest-' + secs ],
458 } catch (e) { print( 'Error: ' + JSON.stringify(e)); }