78 lines
1.7 KiB
Text
78 lines
1.7 KiB
Text
#
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# An almost-ksh compatible `whence' command. This is as hairy as it is
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# because of the desire to exactly mimic ksh.
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#
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# This depends somewhat on knowing the format of the output of the bash
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# `builtin type' command.
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#
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# Chet Ramey
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# chet@ins.CWRU.Edu
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#
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#
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# Chet Ramey <chet.ramey@case.edu>
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#
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# Copyright 1994 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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whence()
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{
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local vflag= path=
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if [ "$#" = "0" ] ; then
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echo "whence: argument expected"
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return 1
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fi
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case "$1" in
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-v) vflag=1
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shift 1
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;;
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-*) echo "whence: bad option: $1"
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return 1
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;;
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*) ;;
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esac
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if [ "$#" = "0" ] ; then
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echo "whence: bad argument count"
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return 1
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fi
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for cmd
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do
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if [ "$vflag" ] ; then
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echo $(builtin type $cmd | sed 1q)
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else
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path=$(builtin type -path $cmd)
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if [ "$path" ] ; then
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echo $path
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else
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case "$cmd" in
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/*) if [ -x "$cmd" ]; then
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echo "$cmd"
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fi
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;;
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*) case "$(builtin type -type $cmd)" in
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"") ;;
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*) echo "$cmd"
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;;
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esac
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;;
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esac
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fi
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fi
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done
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return 0
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}
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