33 lines
908 B
Text
33 lines
908 B
Text
# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# make sure commands before the last one in the pipeline can't change $?
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false
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false | echo $?
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false
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(false) | echo $?
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false
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true | echo $?
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false
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(true) | echo $?
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true
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false | echo $?
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true
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(false) | echo $?
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true
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true | echo $?
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true
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(true) | echo $?
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