topic Re: Shell command SU destroys script execution in Operating System - HP-UX

Shell command SU destroys script execution

Tim Marsh_1 — Tue, 30 Oct 2001 20:39:46 GMT

I have a shell script that works perfectly, the script basically kills processes based on user ID. As I add the SU - command to the script to change to that user the script bombs. The script uses Korn shell command like for loops etc. The user I switch to .profile indicates the Korn shell. I have added a part of the script below. By the way, I cannot run one script from the other, that is SU and launch another script. The purpose of this script is to be used in SD-UX as a preinstall script of which only one can exist. Any help would be greatly appreciated.

su - ecometry <exitval=0
r=`ps -e | grep exe | grep -v grep | grep -v hello.exe`
if [ ! "$r" = "" ]
then
s=`echo "$r" | awk '{ print $1 }'`
for t in $s
do
echo $t
echo "- PID: $t has been echoed by the user."
done
fi
EO

Re: Shell command SU destroys script execution

Craig Rants — Tue, 30 Oct 2001 20:47:43 GMT

Try using the -c option, i.e.

su - ecometry -c

Re: Shell command SU destroys script execution

G. Vrijhoeven — Tue, 30 Oct 2001 20:51:04 GMT

Hi Tim,

There are several options:
1. just a check... has the user on all the systems you are planning to install the same UID and GID?

2 put the script in the fileset execute it from configure script and remove it .

3. put all the env settings you will need in the script PATH... etc. and exec an su command.

Hope this will give you some options.

Gideon

Re: Shell command SU destroys script execution

James R. Ferguson — Tue, 30 Oct 2001 21:06:10 GMT

Hi Tim:

Unless you are 'root' the 'su' command will require a password to be entered from stdin (as the controlling terminal).

Regardless of this, add the '-c' option to your script as:

su - ecometry -c <...
EOF

Regards!

...JRF...

Re: Shell command SU destroys script execution

Tim Marsh_1 — Tue, 30 Oct 2001 21:56:50 GMT

I've tried the -c option with no luck. Any other ideas???

Re: Shell command SU destroys script execution

Roger Baptiste — Tue, 30 Oct 2001 22:35:11 GMT

hi,

Put all the contents between
EOF into a file and call
that file through
su - userid -c "filename"

Remember that the su - will
make the script inherit
the profile settings of
the userid .

HTH
raj

Re: Shell command SU destroys script execution

harry d brown jr — Wed, 31 Oct 2001 03:36:54 GMT

Well I have a big question. if this is a preinstall script for SDux, that is to be run by root, then why do you need to SU??

live free or die
harry

Re: Shell command SU destroys script execution

Bill Hassell — Wed, 31 Oct 2001 03:48:29 GMT

It's really important to write all scripts with the first line directing which interpreter to use:

#!/usr/bin/ksh

Also, when you are troubleshooting the script, add the trace capability with the command:

set -x

The trace lines always go to stderr so if you want to page through the output, do something like this:

./myscript any-options 2>&1 | pg