/snap/core20/2922/usr/sbin
Edit: /snap/core20/2922/usr/sbin/add-shell (860B)
#!/bin/sh -e
if test $# -eq 0
then
echo usage: $0 shellname [shellname ...]
exit 1
fi
file=/etc/shells
# I want this to be GUARANTEED to be on the same filesystem as $file
tmpfile=${file}.tmp
set -o noclobber
trap "rm -f $tmpfile" EXIT
if ! awk '{print}' $file > $tmpfile
then
cat 1>&2 <
> $tmpfile
fi
done
done
chmod --reference=$file $tmpfile
chown --reference=$file $tmpfile
mv $tmpfile $file
trap "" EXIT
exit 0