On Fri, 2008-12-19 at 14:55 -0800, Gordon Messmer wrote:
> Todd Denniston wrote:
> > Craig White wrote, On 12/19/2008 12:03 PM:
> >> getent passwd | grep $1 | awk -F: '{ print $6 }'
> ...
> > Thanks for that getent call suggestion, it simplifies one of my scripts
> > greatly.
>
>
> The grep is useless, and should be discouraged. Use something like this
> instead:
>
> getent passwd "$1" | awk -F: '{ print $6 }'
> or:
> getent passwd "$1" | cut -d: -f6
>
> Calling "getent passwd" on a machine that uses LDAP as an NSS source
> causes a full search of the directory, which can be very expensive on
> large directories. It's better not to make a habit of doing that.
>
> Plus, the "grep" method fails if the username that you're searching for
> is a substring of other usernames in the passwd database.
----
agreed on all accounts...I tossed out the grep idea just as a quick
thought and had doubts about the grep notion but I didn't have the time
to test out other ideas.
Craig
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