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Checking File permissions
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Anoop
*nix forums beginner


Joined: 20 Jul 2006
Posts: 5

PostPosted: Thu Jul 20, 2006 1:19 pm    Post subject: Checking File permissions Reply with quote
Hi All

Please tell me how to check the existence of a file and the read
permission to the file using python script

Thanks for ur inputs

Anoop
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Lawrence D'Oliveiro
*nix forums Guru


Joined: 25 Mar 2005
Posts: 723

PostPosted: Fri Jul 21, 2006 5:26 am    Post subject: Re: Checking File permissions Reply with quote
In message <1153401557.444000.92210@m79g2000cwm.googlegroups.com>, Anoop
wrote:

Quote:
Please tell me how to check the existence of a file and the read
permission to the file using python script

Without knowing what your precise needs are, the best way is to open the
file and try to read from it. If that succeeds, then you've got read
access.

Checking permissions as a separate step from opening the file exposes your
code to a race condition where the permissions may be OK during the initial
check, but then change to deny access before the subsequent open.
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Google
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