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Old 01-03-2008, 07:50 PM   #1
packets
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Registered: Oct 2005
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how to grep all users's certain file


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!
 
Old 01-03-2008, 08:02 PM   #2
GushpinBob
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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

Last edited by GushpinBob; 01-03-2008 at 08:07 PM. Reason: Explain code
 
Old 01-03-2008, 08:03 PM   #3
packets
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Thanks will try that one.
 
Old 01-03-2008, 08:10 PM   #4
packets
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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
 
Old 01-03-2008, 08:22 PM   #5
ghostdog74
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Code:
awk -F":" '
{ 
    path=$6"/.qmail"
    while ( ( getline line < path) > 0 ) {
          print line 
    }
    close( path )
}' /etc/passwd
 
Old 01-03-2008, 08:35 PM   #6
GushpinBob
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Quote:
Originally Posted by packets View Post
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.
 
  


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