mirror of
https://https.git.savannah.gnu.org/git/bash.git
synced 2026-06-27 15:43:18 +02:00
Chet Ramey
96 lines
1.8 KiB
Plaintext
96 lines
1.8 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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# posix rules for assignments preceding export/readonly in functions, using
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# local and global vars; default rules for assignments preceding declare/local
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# in functions, always using local vars.
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#
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# changes to local variables should never propagate upward from the function
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# to its caller, even in posix mode
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x=1
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x=4 declare -r x
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declare -p x
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y=2
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y=5 readonly y
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declare -p y
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# can't use x and y from here on
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f() { local -r a=3; echo f:$a; }
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f1() { declare -r b=3; echo f1:$b; }
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a=4 f
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b=4 f1
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echo global1:$a $b
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set -o posix
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a=4 f
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b=4 f1
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echo global2:$a $b
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set +o posix
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unset -f f f1
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f() { local a=3; readonly a; echo f:$a; }
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f1() { local b=3; declare -r b; echo f1:$b; }
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a=4 f
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b=4 f1
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echo global:$a $b
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set -o posix
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a=4 f
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b=4 f1
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echo global:$a $b
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set +o posix
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unset -f f f1
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f() { local a; a=3 readonly a; echo f:$a; }
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a=4 f
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echo $a
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set -o posix
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a=4 f
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echo $a
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set +o posix
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f1() { a=3 readonly a; echo f1:$a; }
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a=7 f1
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echo global: $a
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set -o posix
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a=7 f1
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echo global: $a
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set +o posix
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unset -f f f1
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# can't use a from here on
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c=7 b=8
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f() { c=3 readonly c; echo f: $c; }
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f1() { b=4 declare -r b; echo f1: $b; }
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f
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echo global: $(declare -p c)
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f1
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echo global: $(declare -p b)
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unset -f f f1
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# can't use c from here on
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