Hello ionel,
> is there a cross-platform library or module for file locking?
> or at least a win32 implementation.
>
> i'm trying to get a lock on some file in a cgi script. ( i got my data
> erased a few times :P )
I'm using:
---------
from os import open as _open, O_CREAT, O_EXCL, O_RDWR
lockfile = "/tmp/some_lock"
lockfd = None
def lock():
global lockfd
try:
lockfd = _open(lockfile, O_CREAT|O_EXCL|O_RDWR)
write(lockfd, "%d" % getpid())
return 1
except OSError: # Already locked
lockfd = None
return 0
def unlock():
if not lockfd:
return 0
try:
close(lockfd)
remove(lockfile)
return 1
except OSError:
return 0
---------
You can wrap it in a class. However make sure you unlock either on __del__
with is a bit tricky or atexit.register(unlock) which is better.
HTH.
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Miki Tebeka <[EMAIL PROTECTED]>
http://tebeka.bizhat.com
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