NetNews Usenet Archive 1992 #16/NN_1992_16.iso/spool/comp/unix/question/9622

Text File | 1992-07-30 | 1.6 KB | 52 lines

Newsgroups: comp.unix.questions
Path: sparky!uunet!usc!cs.utexas.edu!asuvax!ennews!enuxhb.eas.asu.edu!sridhar
From: [e-mail] (Sridhar Venkataraman)
Subject: Re: How to find out what groups I belong to
Message-ID: <[e-mail]>
Sender: [e-mail] (USENET News System)
Organization: Arizona State University, Tempe AZ
References: <[e-mail]> <[e-mail]> <[e-mail]>
Date: Fri, 31 Jul 1992 03:33:24 GMT
Lines: 40

[e-mail] (Shubhendu Sekhar Mukherjee) writes :
)>>>>> Tom Christiansen <[e-mail]> writes:
)TC> From the keyboard of [e-mail] (David Ratner):
)TC> :
)TC> :
)TC> :/usr/ucb/groups [login-name]
)TC> :
)TC> :Just typing "groups" with no arguments lists the groups you are in.
)TC> :Specifying a login-name lists the groups that person is in.
)
)TC> Yes, but we still haven't told him how to list out all the
)TC> members in a given group.
)
)/usr/bin/ypcat group | grep <groupname>

Atleast on our system (4.3 BSD Tahoe) we don't have YP.
/usr/bin/ypcat: Command not found.

I lack the expertise in awk/perl/sed but the following should give the
results...

----script1-----
#!/bin/sh
name=$1
awk -F: "/^$name/ { print \$3  ; exit } " /etc/group

----script2-----
#!/bin/sh
id=$1
awk -F: "\$4 == $id {print \$1}" /etc/passwd

script1 <groupname> should print the group id.
script2 <groupid> should fetch the members of the group.

Yes, I know there are 2 invocations of awk and /bin/sh.. (to guard
against wizard flames :-)

)-Shubu

Sridhar.