| # 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/>. |
| # |
| # make sure commands before the last one in the pipeline can't change $? |
| false |
| false | echo $? |
| false |
| (false) | echo $? |
| |
| false |
| true | echo $? |
| false |
| (true) | echo $? |
| |
| true |
| false | echo $? |
| true |
| (false) | echo $? |
| |
| true |
| true | echo $? |
| true |
| (true) | echo $? |