#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# non-interactive

# error
read -n -1

# from pipe -- should work, but doesn't change tty attributes
echo abcdefg | {
	read -n 3 xyz
	echo $xyz
	cat -	# make sure we don't read too much
}

# fewer chars than specified
echo ab | {
	read -n 3 xyz
	echo $xyz
}

echo abc | {
	read -N 4 -d$'\n' foo
	echo $foo
}

read -n 1 < $0
echo "$REPLY"

# succeed if fd is valid
read -n 0 var <<<'abc'
echo $?
