how to grep all users's certain file

packets · 01-03-2008, 07:50 PM

Can someone lead me how to do this. I have a bunch of users having .qmail in their home directory. How can I grep or cat whats inside in each of the user's .qmail file? I'm thinking of a bash script with 'for' syntax. Here is the sample:

Quote:

#!/bin/bash

users=`cat /etc/passwd | awk -F: '{print $1}'`

for id in $users
do
cd ~$id/ | cat .qmail
done

Now that I got all the list of users, didn't know how to cat/grep the .qmail file in each users. Please advise.

Thanks!

GushpinBob · 01-03-2008, 08:02 PM

change:

Code:

cd ~$id/ | cat .qmail

to

Code:

if [ -d ~${id} ] ; then
   cd ~${id}
   if [ -e ".qmail" ] ; then
      cat .qmail
   done
done

EDIT:
What this code modification should do (I hope) is that the script will go into the user's home directory (if it exists), and cat the .qmail file (if it exists).
Haven't tested it but give it a shot

packets · 01-03-2008, 08:03 PM

Thanks will try that one.

packets · 01-03-2008, 08:10 PM

I think there's a mistake in your advice. You didn't put a fi.

Quote:

if [ -d ~id ] ; then
cd ~${id}
if [ -e ".qmail" ] ; then
cat .qmail
fi
fi

Though added an fi, still didn't work

ghostdog74 · 01-03-2008, 08:22 PM

Code:

awk -F":" '
{ 
    path=$6"/.qmail"
    while ( ( getline line < path) > 0 ) {
          print line 
    }
    close( path )
}' /etc/passwd

GushpinBob · 01-03-2008, 08:35 PM

Quote:

Originally Posted by packets

I think there's a mistake in your advice. You didn't put a fi.

Though added an fi, still didn't work

D'oh! My bad, I get the for loops and the if statements mixed up sometimes. Sorry that my solution didn't work anyhow.