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