Bug 859

'sh -c command' does not ignore/handle SIGINT while waiting for command
to complete.

Fix: 

none
How-To-Repeat: 
keyboard SIGINT in emacs or vi while posting in trn, or try
this interactive ditty and see if the subshell keeps on running:

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#!/bin/sh
#
# test sig handling in sh -c
#
# create second script
TF=/tmp/test.$$
cat > $TF <<\/EOF
#!/bin/sh
echo -e "shell c flags: $-"
trap
trap : 2 3
echo "Type ^C and ^\\"
for i in a b c d e
do
  sleep 1
  echo shell c: $i
done
/EOF
chmod a+x $TF

if [ $# != 1 ]
then
  echo "$0 shell-to-test"
  exit 1
fi
SHELL=$1
echo -e "shell a flags: $-"
trap
trap : 2 3
$SHELL -c "echo shell b flags: $-; trap; $TF"
echo 'shell a exit: ' $?
rm $TF
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