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# 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/>.
#
# builtins with exit status inverted
( true )
echo $?
( ! true )
echo $?
( false )
echo $?
( ! false )
echo $?
# inverting shouldn't affect exit
(exit 42)
echo $?
( ! exit 42 )
echo $?
# commands requiring an exec with exit status inverted -- broken in bash-2.04
( ls > /dev/null 2>&1 )
echo $?
( ! ls > /dev/null 2>&1 )
echo $?
touch /tmp/notwrite
chmod 400 /tmp/notwrite
# make sure redirection failures in commands whose exit status is inverted
# are handled correctly
( ls > /tmp/notwrite ) 2>/dev/null
echo $?
( ! ls > /tmp/notwrite ) 2>/dev/null
echo $?
# now add exit traps, true and false for commands with and without exit
# status inversion
(trap 'false' 0 ; ! ls > /tmp/notwrite ) 2>/dev/null
echo $?
(trap 'false' 0 ; ls > /tmp/notwrite ) 2>/dev/null
echo $?
(trap 'true' 0 ; ! ls > /tmp/notwrite ) 2>/dev/null
echo $?
(trap 'true' 0 ; ls > /tmp/notwrite ) 2>/dev/null
echo $?
rm -f /tmp/notwrite
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