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Shell Programming and Scripting

Get execute result of su

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# 1  
Old 02-12-2009
Get execute result of su
I wrote a shell script.

Code:
 
su user << EOF
some commands
result=$?
EOF
 
echo $result
Other program determined by $result

It outputs nothing.

How to pass the variable 'result' "inside su" to "outside su"?
# 2  
Old 02-12-2009
not tested
try echoing the value like

RETURN_VAL=`su user << EOF
some commands
result=$?
echo $result
EOF`

echo $RETURN_VAL
# 3  
Old 02-12-2009
Quote:
Originally Posted by rakeshou
try echoing the value like

RETURN_VAL=`su user << EOF
some commands
result=$?
echo $result
EOF`

echo $RETURN_VAL
Thank you for your reply
I tried your method but the output is my whole code.

su user << EOF
some commands
result=$?
echo $result
EOF

I tried another one

Code:
 
RETURN_VAL=$(su user << EOF
some commands
result=$?
echo $result
EOF)
 
echo $RETURN_VAL

but it is still nothing not 0 or some error number
what I did wrongly?
# 4  
Old 02-14-2009
Any guys here could help for my problem?
thanks a lot.
# 5  
Old 02-14-2009
Quote:
Originally Posted by uativan
Any guys here could help for my problem?
thanks a lot.
Code:
#! /bin/bash

echo $?
su user
echo $?

the running result is,
Code:
-bash-3.00$ ./su.sh
0
su: user user does not exist
1

$? can be helpful?
# 6  
Old 02-14-2009
put the commands in a script then run. you really want to use the su - option to get a clean environment.

Code:
su - user -c "/foo/bar/command.script.sh"

if [[ $? -ne 0 ]]
then
   echo "bad return code"
fi

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