mjhjmtu

I have bash script and inside it part with expect code:

#!/bin/bash
set -ex

funct()

pass3="some_pass"

 expect -c "
 spawn su - oracle
 expect "Password:"
 send "$pass3n"
 interact
 "

funct

var_ulimit=`ulimit -Ha |grep "open files" |awk 'print $4'`
echo $var_ulimit

when i execute the script ./script.sh, part with exepct work's ok i have switched to correct user. Problem is that script stop's at that point when executed from shell. Only when i do exit from shell bash script continues. Is it possible to tune expect part of the script to proceed with the rest of the bash script and to preserve shell for the rest of the script when do su - oracle?

Thnx

The last two commands will never be executed in the shell of the oracle user. Try that:

expect -c "
 log_user 0
 spawn su - oracle -c "ulimit -Hn"
 expect "Passwort:"
 send "$pass3n"
 expect eof
 puts "$expect_out(buffer)"
"

Also assuming that you only want the open files limit, with the -n flag (no need to grep, awk, ...).

This is largely untested. The aim is to send the commands you want to run as user "oracle" to the function as a parameter, and then get those to execute within the expect session.

This uses single-quoted here-docs to contain both the commands you want to run as oracle and the expect body, so take care to match the quoting I'm demonstrating here.

#!/bin/bash
set -ex

as_oracle() 
 local pass="the_password"
 local cmds=$(cat -) # read the oracle commands from stdin

 # quoting in the next line is very important
 expect -f - "$pass" "$cmds" <<'END_EXPECT'
 lassign $argv pass3 commands

 spawn su - oracle
 expect "Password:"
 send -- "$pass3r"

 # this is the regular expression that matches the end
 # of oracle's prompt: please change it if it's not correct
 set prompt $ $

 expect -re $prompt
 send -- "eval "$commands"r"
 expect -re $prompt
 send -- "exitr"
 expect eof
END_EXPECT



as_oracle <<'END_ORACLE'
 var_ulimit=$(ulimit -Ha | awk '/open files/ print $4')
 echo $var_ulimit
END_ORACLE

I'm not certain that eval is the way to execute those commands. This may be better:

send -- ". <(echo "$commands")r"

Create a new script file for your expect script like "expect.sh".
And call it in your bash script:

./expect.sh

Now your expect script will work in your bash script.