Solved

Korn shell script

Posted on 1998-10-05
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Last Modified: 2010-05-18
I wrote the following script, but it is not working when I run it as root. It is supposed to read one line at a time and process each line. As root it only reads one line. As my userid it reads each line, but can't rsh to the computer name listed in the file it reads. Any suggestions?
#!/usr/bin/ksh
while read dev
do
   if [[ $dev != lastrecord ]]
   then
     echo "-"$dev"-"
     var1=`rsh -l root $dev lpstat -d | awk '{print $4}'`
     echo $dev"  "$var1 >> ./test.file
   else
     break
   fi
done < ./hp.txt
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Question by:carydb
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7 Comments
 
LVL 51

Expert Comment

by:ahoffmann
ID: 2007213
1. your rsh command misses the hostname (typo?)
2. check your  /.rhosts file
0
 

Author Comment

by:carydb
ID: 2007214
I did some further checking and found that the while loop breaks after the rsh command succeeds. I have to rewrite the script. Thanks anyway.
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LVL 51

Expert Comment

by:ahoffmann
ID: 2007215
so my suggestion was right
0
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Author Comment

by:carydb
ID: 2007216
ahoffmann - No, your suggestion was not right. What happened is the rsh was working fine. It would log on to the remote and write the default printer to a file, but when the rsh line completed the input file to the script was already closed so the while loop would not continue. the ./rhost file was not a problem and my rsh command did not miss the host name, thus no typo? I appriciate you input, but I rewrote the script to write a script that had multiple rsh commands to get rid of the while loop.  Perhaps I should withdraw the question since I already solved it. Can I withdraw a question? How?
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LVL 51

Expert Comment

by:ahoffmann
ID: 2007217
look at the Support topic at E-E, I think email was support@experts-exchange.com
0
 
LVL 1

Accepted Solution

by:
ksb earned 50 total points
ID: 2007218
The "rsh" command is reading all of stdin when it fails.

Use "rsh -n" and the original code will work fine.


0
 

Author Comment

by:carydb
ID: 2007219
Sheesh! It was that easy huh? I rewrote the script from a Korn script to a C program that used system calls to get around the problem. I tested the "-n" flag on rsh and the script ran just fine. Thanks a bunch! :)  
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