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I want to add a group for permit user belong to group to shutdown the machine system is old sysv unix,with old bourne sh. I did
{
groufind=`groups|grep system|awk '{print $2}'`
}
groupscheck
eval `id | /usr/bin/sed 's/[^a-z0-9=].*//'`
if [ "$LOGNAME != "root" -o $groufind != "system" ];
then
echo "$0: Only root or system group can run /sbin/shutdown."
exit 2
fi
else
echo "$0: can't check user id."
exit 2
But doesn’t work,exit with error
/sbin/shutdown: test: argument expected
Where is wrong?
Sorry for incomplete script,i want a work like this
groupscheck()
{
groufind=`groups|grep system|awk '{print $2}'`
who=`id|cut -d "(" -f 2|cut -d ")" -f 1`
root=root
system=system
}
groupscheck
if [ $who != $root -o $groufind != $system ];
then
echo "OK"
else
echo "no"
fi
If root or user in system exec the script give OK otherwise no,but why don’t work?
Answer
There’s a missing quote… You should really check your code, at least with a syntax highlighter. This line…
if [ "$LOGNAME != "root" -o $groufind != "system" ];
Should be:
if [ "$LOGNAME" != "root" -o $groufind != "system" ];
Now for the rest, I’m gonna have to guess because your code sample is nothing close to helpful:
- This weird scope at the beginning is probably
groupchecks‘s definition. - I’m not really sure why you’re calling
eval. - I don’t why you added an
elsebranch in the end, since it has no matchingif.
Anyway, I’d say your script could be simplified as:
#!/bin/sh
groups $LOGNAME | grep system > /dev/null 2>&1
if [ $? -ne 0 -a "$LOGNAME" != "root" ]; then
echo "$0: Only root or system group can run /sbin/shutdown."
exit 1
else
echo "$0: Shutdown possible."
exit 0
fi
… even though I’m not quite sure if all of this runs on an old SYSv4 system.
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