mirror of https://github.com/n-hys/bash.git
71 lines
1.4 KiB
Plaintext
71 lines
1.4 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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var=$'\01\02\03\177'
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bar=${unset:-$var}
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recho "$bar"
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unset -v bar
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bar=${unset:-"$var"}
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recho "$bar"
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foo=${parameter:=$var}
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recho "$foo"
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recho "$parameter"
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unset -v foo parameter
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foo=${parameter:="$var"}
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recho "$foo"
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recho "$parameter"
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unset -v foo parameter
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foo="${parameter:=$var}"
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recho "$foo"
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recho "$parameter"
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unset -v foo parameter
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recho ${parameter:=a\ b}
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unset -v parameter
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recho ${parameter:="a b"}
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unset -v parameter
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v='a b'
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recho ${parameter:=$v}
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unset -v parameter
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recho ${parameter:="$v"}
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unset -v parameter
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# unsetting IFS here
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set " abc " " def ghi " "jkl "
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unset -v IFS var
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var=${var-$*}/${var-$*}
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printf '[%s]\n' "$var"
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unset -v var
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: ${var=$*}
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printf '[%s]\n' "$var"
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unset -v var
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: ${var:=$*/$*/${var-$*}}
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printf '[%s]\n' "$var"
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