mirror of
https://https.git.savannah.gnu.org/git/bash.git
synced 2026-06-21 21:07:57 +02:00
Chet Ramey
80 lines
1.9 KiB
Plaintext
80 lines
1.9 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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# more odds and ends for nofork command substitution
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# make sure parsing is right within conditional commands
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[[ ${ echo -n "[${ echo -n foo; }]" ; } == '[foo]' ]] || echo bad 1
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[[ "${ echo -n "[${ echo -n foo; }]" ; }" == '[foo]' ]] || echo bad 1
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# mix multiple calls to parse_and_execute
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got=$(eval 'x=${ for i in test; do case $i in test) echo .;; esac; done; }' ; echo $x)
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echo $got
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# mix compound assignment and nofork command substitution
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: ${ a=(1 2 3 ${ echo 4;} ); }
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declare -p a
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unset a
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# function execution with side effects
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int=0
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incr()
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{
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echo incr: $int
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(( int++ ))
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}
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: ${ incr; }
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: ${ incr; }
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declare -p int
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# expansion inside here-document body
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int=0
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: <<EOF
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${ incr; }
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EOF
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echo after here-doc: $int
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# jobs list in nofork command substitution
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sleep 1 &
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sleep 1 &
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jl1=${ jobs; }
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printf '%s\n' "$jl1"
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jl2=${ jobs; }
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printf '%s\n' "$jl2"
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# nofork command substitution doesn't affect the shell's random number sequence
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RANDOM=42
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echo $RANDOM ${ echo $RANDOM; }
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RANDOM=42
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echo $RANDOM $RANDOM
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# here-documents and other word expansions with comsub/funsub on the rhs
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exec 4<<EOF
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we should try rhs
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${word-$(echo comsub)}
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and
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${word-${ echo funsub; }}
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in here-documents
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EOF
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cat <&4
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exec 4<&-
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echo after all they ${word-$(echo work here)}
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echo and ${word-${ echo work here; }}
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