if : ; then set -e N=95 while :; do # expr returns 1 if expression is null or 0 set +e N_MOD_100=`expr $N % 100` set -e echo $N_MOD_100 N=`expr $N + 1` if [ $N -eq 110 ]; then break fi done set +e fi ( set -e false echo bad ) echo $? x=$( set -e false echo bad ) echo $? $x # command subst should not inherit -e set -e echo $(false; echo ok) if set +e then false fi echo hi set -e # a failing command in the compound list following a while, until, or # if should not cause the shell to exit while false; do echo hi done echo while succeeded x=1 until (( x == 4 )); do x=4 done echo until succeeded: $x if false; then echo oops fi echo if succeeded # failing commands that are part of an AND or OR list should not # cause the shell to exit false && echo AND list failed echo AND list succeeded false || echo OR list succeeded ! false echo ! succeeded # make sure eval preserves the state of the -e flag and `!' reserved word set -e if eval false; then echo oops fi echo eval succeeded ! eval false echo ! eval succeeded -- 1 ! eval '(exit 5)' echo ! eval succeeded -- 2 set -e until builtin false; do echo a; break; done echo $? until eval false; do echo b; break; done echo $? : ${TMPDIR:=/tmp} FN=$TMPDIR/set-e-$$ cat > $FN false echo after 1 false EOF set -e until . $FN; do echo a; break; done echo $? rm -f $FN set +e ${THIS_SH} ./set-e1.sub ${THIS_SH} ./set-e2.sub
