69 lines
1.7 KiB
Text
69 lines
1.7 KiB
Text
#
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# Chet Ramey <chet.ramey@case.edu>
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#
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# Copyright 2001 Chester Ramey
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#
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# 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 2, or (at your option)
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# any later version.
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#
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# TThis 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, write to the Free Software Foundation,
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# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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# Sort the positional paramters.
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# Make sure the positional parameters are passed as arguments to the function.
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# If -u is the first arg, remove duplicate array members.
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sort_posparams()
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{
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local -a R
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local u
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case "$1" in
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-u) u=-u ; shift ;;
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esac
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# if you want the case of no positional parameters to return success,
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# remove the error message and return 0
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if [ $# -eq 0 ]; then
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echo "$FUNCNAME: argument expected" >&2
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return 1
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fi
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# make R a copy of the positional parameters
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R=( "${@}" )
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# sort R.
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R=( $( printf "%s\n" "${R[@]}" | sort $u) )
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printf "%s\n" "${R[@]}"
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return 0
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}
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# will print everything on separate lines
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set -- 3 1 4 1 5 9 2 6 5 3 2
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sort_posparams "$@"
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# sets without preserving quoted parameters
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set -- $( sort_posparams "$@" )
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echo "$@"
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echo $#
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# sets preserving quoted parameters, beware pos params with embedded newlines
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set -- 'a b' 'a c' 'x z'
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oifs=$IFS
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IFS=$'\n'
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set -- $( sort_posparams "$@" )
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IFS="$oifs"
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echo "$@"
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echo $#
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sort_posparams
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