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/*
* AppLock.vala
*
* Copyright 2016 Tony George <teejeetech@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*
*/
using TeeJee.Logging;
using TeeJee.FileSystem;
using TeeJee.ProcessHelper;
using TeeJee.Misc;
public class AppLock : GLib.Object {
public string lock_file = "";
public string lock_message = "";
public bool create(string app_name, string message){
var lock_dir = "/var/run/lock/%s".printf(app_name);
dir_create(lock_dir);
lock_file = path_combine(lock_dir, "lock");
try{
var file = File.new_for_path(lock_file);
if (file.query_exists()) {
string txt = file_read(lock_file);
string process_id = txt.split(";")[0].strip();
lock_message = txt.split(";")[1].strip();
long pid = long.parse(process_id);
if (process_is_running(pid)){
log_msg(_("Another instance of this application is running")
+ " (PID=%ld)".printf(pid));
return false;
}
else{
log_msg(_("[Warning] Deleted invalid lock"));
file.delete();
write_lock_file(message);
return true;
}
}
else{
write_lock_file(message);
return true;
}
}
catch (Error e) {
log_error (e.message);
return false;
}
}
private void write_lock_file(string message){
string current_pid = ((long) Posix.getpid()).to_string();
file_write(lock_file, "%s;%s".printf(current_pid, message));
}
public void remove(){
try{
var file = File.new_for_path (lock_file);
if (file.query_exists()) {
file.delete();
}
}
catch (Error e) {
log_error (e.message);
}
}
}
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