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  • Committer: Bazaar Package Importer
  • Author(s): Jonathan Wiltshire
  • Date: 2010-12-03 21:56:53 UTC
  • mfrom: (1.2.1 upstream) (3.1.8 sid)
  • Revision ID: james.westby@ubuntu.com-20101203215653-scx9roloq4m0dqns
Tags: 1.0.4-1
http://bugs.debian.org/555293
https://launchpad.net/bugs/409130
* New upstream release
    Closes: #555293
    LP: #409130 #507246 #528518 #534829 #522618
* Update debian/copyright
* The following patches are either integrated or fixed properly
  upstream: no-chmod-777.patch allow-root-backup.patch
* Refactor remaining patches and make the headers DEP-3 compliant
* Convert to source format 3.0 (quilt) and drop quilt dependency and
  logic
* Don't depend on a specific version of Python; let dh_python choose
  the best option
* Remove the "earlier-than" restriction for the Conflicts on
  backintime-kde4
* Standards version 3.9.1 (no changes required)
* Update my email address

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guiapplicationinstance.py
1
 
#    Back In Time
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#    Copyright (C) 2008-2009 Oprea Dan
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#
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#    This program is free software; you can redistribute it and/or modify
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#    it under the terms of the GNU General Public License as published by
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#    the Free Software Foundation; either version 2 of the License, or
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#    (at your option) any later version.
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#
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#    This program is distributed in the hope that it will be useful,
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#    but WITHOUT ANY WARRANTY; without even the implied warranty of
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#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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#    GNU General Public License for more details.
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#
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#    You should have received a copy of the GNU General Public License along
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#    with this program; if not, write to the Free Software Foundation, Inc.,
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#    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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import os
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import os.path
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import time
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#class used to handle one application instance mechanism
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class GUIApplicationInstance:
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        #specify the base for control files
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        def __init__( self, base_control_file, raise_cmd = '' ):
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                self.pid_file = base_control_file + '.pid'
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                self.raise_file = base_control_file + '.raise'
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                self.raise_cmd = raise_cmd
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                #remove raise_file is already exists
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                try:
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                        os.remove( self.raise_file )
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                except:
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                        pass
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                self.check( raise_cmd )
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                self.start_application()
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        #check if the current application is already running
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        def check( self, raise_cmd ):
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                #check if the pidfile exists
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                if not os.path.isfile( self.pid_file ):
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                        return
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                #read the pid from the file
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                pid = 0
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                try:
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                        file = open( self.pid_file, 'rt' )
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                        data = file.read()
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                        file.close()
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                        pid = int( data )
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                except:
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                        pass
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                #check if the process with specified by pid exists
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                if 0 == pid:
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                        return
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                try:
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                        os.kill( pid, 0 )       #this will raise an exception if the pid is not valid
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                except:
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                        return
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                #exit the application
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                print "The application is already running ! (pid: %s)" % pid
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                #notify raise
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                try:
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                        file = open( self.raise_file, 'wt' )
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                        file.write( raise_cmd )
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                        file.close()
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                except:
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                        pass
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                exit(0) #exit raise an exception so don't put it in a try/except block
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        #called when the single instance starts to save it's pid
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        def start_application( self ):
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                file = open( self.pid_file, 'wt' )
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                file.write( str( os.getpid() ) )
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                file.close()
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        #called when the single instance exit ( remove pid file )
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        def exit_application( self ):
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                try:
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                        os.remove( self.pid_file )
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                except:
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                        pass
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        #check if the application must to be raised
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        #return None if no raise needed, or a string command to raise
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        def raise_command( self ):
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                ret_val = None
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                try:
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                        if os.path.isfile( self.raise_file ):
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                                file = open( self.raise_file, 'rt' )
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                                ret_val = file.read()
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                                file.close()
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                                os.remove( self.raise_file )
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                except:
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                        pass
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                return ret_val
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