I have a unix script in which I am calling functions. I want the function should return immediately if any of the command failed in between.
But checking $? after every command I can not do. Is there any other way to do this.
2 Answers
Maybe running the script from a file line by line (as long of course as each of your functions are one line long).
Maybe the following script can be a starting point:
#!/bin/sh
while read l
do
eval "$l || break"
done <<EOF
echo test | grep e
echo test2 | grep r
echo test3 grep 3
EOF
Comments
This is another idea after my previous answer. It works with bash script and requires your functions to be quite simple (pipes may cause some issues):
#!/bin/bash
set -o monitor
check() {
[ $? -eq 0 ] && exit
}
trap check SIGCHLD
/bin/echo $(( 1+1 ))
/bin/echo $(( 1/0 ))
/bin/echo $(( 2+2 ))
Furthermore: functions need to be external command (this is why I use /bin/echo rather than echo). Regards.
set -e?