ersh - rsh frontend hack returning exit status of remote cmd

[Maarten Litmaath]

#!/bin/sh
# @(#)ersh 2.4 91/01/30 Maarten Litmaath
# This rsh front-end returns the exit status of the remote command.
# It works OK with sh/csh-compatible shells on the remote (!) side.
# If there is no remote command present, /usr/ucb/rlogin is invoked.
# Usage: see rsh(1).

unset hostname lflag nflag user

case $1 in
-l)
;;
*)
hostname=$1
shift
esac

case $1 in
-l)
lflag=-l
user=$2
shift 2
esac

case $1 in
-n)
nflag=-n
shift
esac

case $hostname in
'')
hostname=$1
shift
esac

case $# in
0)
exec /usr/ucb/rlogin $lflag ${user+"$user"} "$hostname"
esac

AWK='
NR > 1 {
print prev;
prev = $0;
prev1 = $1;
prev2 = $2;
}
NR == 1 {
prev = $0;
prev1 = $1;
prev2 = $2;
}
END {
if (prev1 ~ /[0-9]*[0-9]0/)
exit(prev1 / 10);
if (prev1 == "0")
exit(prev2);
print prev;
exit(1);
}
'

exec 3>&1

/usr/ucb/rsh "$hostname" $lflag ${user+"$user"} $nflag \
"(${*-:}); sh -c '"'echo "$0 $1" >&2'\'' $?0 "$status"' \
2>&1 >&3 3>&- | awk "$AWK" >&2 3>&-
--
Temporary files like /tmp/sh$$ are an abomination.