e0da11ea79
On utilise la variable SUDO_USER et sinon on se rabat sur un getuid darcs-hash:20040910192447-41617-51511e6987093eae4473592bde71fa0bd73f0151.gz
50 lines
1.2 KiB
Python
Executable file
50 lines
1.2 KiB
Python
Executable file
#!/usr/bin/env python
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# -*- coding: iso-8859-15 -*-
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""" Gestion de lock
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Copyright (C) Frédéric Pauget
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Licence : GPLv2
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"""
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import os,string,time,sys, affich_tools
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def make_lock(lock_name, lock_comment='') :
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""" Création d'un lock """
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lock_file = '/var/lock/' + lock_name
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if os.path.isfile(lock_file) :
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### Lock existant
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# Lecture du lock
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fd = open(lock_file, "r")
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pid= fd.readline().strip()
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fd.close()
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# Informations sur le processus lockant
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if os.system( "ps %s > /dev/null 2>&1" % pid ) :
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# Le script lockant ne tourne plus
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os.remove(lock_file)
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else :
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# Il faut attendre
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a = affich_tools.anim('\tattente du lock')
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for i in range(8) :
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time.sleep(1)
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a.cycle()
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sys.stdout.write('\r')
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return make_lock(lock_name, lock_comment)
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### Prise du lock
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lock_fd=open(lock_file, "w")
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lock_fd.write("%s\n%s" % (os.getpid(), lock_comment) )
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lock_fd.close()
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def remove_lock( lock_name ) :
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""" Destruction du lock """
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lock_file = '/var/lock/' + lock_name
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try :
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fd = open(lock_file, "r")
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if fd.readline().strip()=="%s" % os.getpid():
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os.remove(lock_file)
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fd.close()
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except :
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None
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