else
sed_script="s|^|${i}:|"
fi
- $grep $opt "$pat" | sed "$sed_script"
+ # Hack adapted from GPLed code at
+ # http://home.comcast.net/~j.p.h/cus-faq-2
+ # Has the same effect as the following two lines of bash:
+ #
+ # $grep $opt "$pat" | sed "$sed_script"
+ # exit ${PIPESTATUS[0]}
+ #
+ # Inside the `...`, fd4 goes to the pipe whose other end is read
+ # and passed to eval; fd1 is the normal standard output
+ # preserved the line before with exec 3>&1
+ exec 3>&1
+ eval `
+ exec 4>&1 >&3 3>&-
+ {
+ $grep $opt "$pat" 4>&-; echo "r=$?;" >&4
+ } | sed "$sed_script"
+ `
+ exit $r
fi
r=$?
test $res -lt $r && res=$r