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Commands for changing ownership of a file

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  Commands for changing ownership of a file Jason Hsu <jhsu802701@gmail.com> - 2011-08-14 15:56 -0700
    Re: Commands for changing ownership of a file Chris Rebert <clp2@rebertia.com> - 2011-08-14 16:37 -0700
    Re: Commands for changing ownership of a file Michael Poeltl <michael.poeltl@univie.ac.at> - 2011-08-15 03:58 +0200

#11424 — Commands for changing ownership of a file

I have a script that I execute as root, but I need to change the
ownership of the files created in the script to that of my username.
In GNU Bash, the command is something like "chown myusername:users".
What's the equivalent Python command?  I know that there is a command
that uses numbers for the username and group, but is there a command
that would allow me to use "myusername" and "users" instead of numbers?

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#11425

On Sun, Aug 14, 2011 at 3:56 PM, Jason Hsu <jhsu802701@gmail.com> wrote:
> I have a script that I execute as root, but I need to change the
> ownership of the files created in the script to that of my username.
> In GNU Bash, the command is something like "chown myusername:users".
> What's the equivalent Python command?  I know that there is a command
> that uses numbers for the username and group, but is there a command
> that would allow me to use "myusername" and "users" instead of numbers?

Simply use the `pwd` and `grp` modules to lookup the uid and gid for
the username and group-name respectively. Then use the id-based chown
function(s) you already came across.
http://docs.python.org/library/pwd.html#pwd.getpwnam
http://docs.python.org/library/grp.html#grp.getgrnam

Cheers,
Chris

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#11434

in python-3.2.1 I'm using os.system() again, from time to time
maybe that's the one you were looking for?

>>> os.system('chown user:group /tmp/f')
0
>>> os.system('ls -l /tmp/f')
-rw-r--r-- 1 user group 0 Aug 15 03:52 /tmp/f

and besides os.chown() (where you ned the uid and gid), you could also use subprocess.call() or subprocess.Popen()

regards
Michael
* Jason Hsu <jhsu802701@gmail.com> [2011-08-15 01:15]:
> I have a script that I execute as root, but I need to change the
> ownership of the files created in the script to that of my username.
> In GNU Bash, the command is something like "chown myusername:users".
> What's the equivalent Python command?  I know that there is a command
> that uses numbers for the username and group, but is there a command
> that would allow me to use "myusername" and "users" instead of numbers?
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 

-- 
Michael Poeltl
Computational Materials Physics      voice: +43-1-4277-51409
Univ. Wien, Sensengasse 8/12         fax:   +43-1-4277-9514 (or 9513) 
A-1090 Wien, AUSTRIA   cmp.mpi.univie.ac.at 
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