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Implement unique application instance checks

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This commit is contained in:
Kovid Goyal 2008-03-18 22:25:17 +00:00
parent ef64ca609e
commit 05e32593ec
2 changed files with 12 additions and 3 deletions
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13
src/libprs500/__init__.py
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@ -411,7 +411,16 @@ def relpath(target, base=os.curdir):
rel_list = [os.pardir] * (len(base_list)-i) + target_list[i:] rel_list = [os.pardir] * (len(base_list)-i) + target_list[i:]
return os.path.join(*rel_list) return os.path.join(*rel_list)
_lock_file = None def _clean_lock_file(file):
try:
file.close()
except:
pass
try:
os.remove(file.name)
except:
pass
def singleinstance(name): def singleinstance(name):
''' '''
Return True if no other instance of the application identified by name is running, Return True if no other instance of the application identified by name is running,
@ -435,7 +444,7 @@ def singleinstance(name):
try: try:
f = open(path, 'w') f = open(path, 'w')
fcntl.lockf(f.fileno(), fcntl.LOCK_EX|fcntl.LOCK_NB) fcntl.lockf(f.fileno(), fcntl.LOCK_EX|fcntl.LOCK_NB)
_lock_file = f atexit.register(_clean_lock_file, f)
return True return True
except IOError: except IOError:
return False return False