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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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Avell Diroll
*nix forums beginner


Joined: 23 Dec 2005
Posts: 9

PostPosted: Thu Jul 20, 2006 1:56 pm    Post subject: Re: Checking File permissions Reply with quote
Anoop wrote:
Quote:
Please tell me how to check the existence of a file and the read
permission to the file using python script

You can check the os module (os.stat comes to mind).

For an exemple you can have a look at :
http://www.pixelbeat.org/talks/python/ls.py

Regards,

Avell
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taleinat@gmail.com
*nix forums beginner


Joined: 25 Apr 2006
Posts: 14

PostPosted: Fri Jul 21, 2006 12:46 pm    Post subject: Re: Checking File permissions Reply with quote
Anoop wrote:
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

os.access(path, mode) does just this, check it out.

Cross-platform-ness isn't a problem, the docs say it is available for
Windows, Unix and Mac, and I've used it without a hitch on Win2k, WinXP
and various Linux and Unix platforms.

Quote:
help(os.access)
Help on built-in function access in module nt:


access(...)
access(path, mode) -> 1 if granted, 0 otherwise

Use the real uid/gid to test for access to a path. Note that most
operations will use the effective uid/gid, therefore this routine
can
be used in a suid/sgid environment to test if the invoking user has
the
specified access to the path. The mode argument can be F_OK to
test
existence, or the inclusive-OR of R_OK, W_OK, and X_OK.
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Google
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