43 lines
1.3 KiB
Text
43 lines
1.3 KiB
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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# if IFS side effects in ${IFS=} assignments take place, how do you cope with
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# later changes to IFS in the same set of expansions? You've already
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# committed to using the first character of the (old) IFS to expand $* in
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# the previous expansions, and changing it to not include ' ', for instance,
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# results in the first couple of ${*} below not being split at all
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set -f -- a b c
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unset -v IFS
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printf '<%s> ' ${*}${IFS=}${*}${IFS:=-}"${*}"
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echo
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printf "after 1: IFS "
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echo "${IFS-unset}"
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recho "$*"
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set -f -- a 'b c' d
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unset -v IFS
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printf '<%s> ' ${*}${IFS=}${*}${IFS:=-}"${*}"
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echo
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printf "after 2: IFS "
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echo "${IFS-unset}"
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recho "$*"
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unset -v IFS
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recho $*
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recho "$*"
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IFS=' '
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recho $*
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recho "$*"
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