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#! /bin/sh

 

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set -ef

 

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ALLMATCHES=0

 

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while getopts a whichopts

 

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do

 

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        case "$whichopts" in

 

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                a) ALLMATCHES=1 ;;

 

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                ?) printf "Usage: %s [-a] args\n" $0 ; exit 2 ;;

 

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        esac

 

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done

 

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shift $(($OPTIND - 1))

 

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if [ "$#" -eq 0 ]; then

 

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 ALLRET=1

 

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else

 

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 ALLRET=0

 

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fi

 

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case $PATH in

 

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 *::) : "not *DIR:" ;;

 

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  *:) PATH="$PATH:" ;;

 

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esac

 

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for PROGRAM in "$@"; do

 

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 RET=1

 

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 IFS_SAVE="$IFS"

 

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 IFS=:

 

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 case $PROGRAM in

 

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  */*)

 

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   if [ -f "$PROGRAM" ] && [ -x "$PROGRAM" ]; then

 

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    printf '%s\n' "$PROGRAM"

 

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    RET=0

 

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   fi

 

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   ;;

 

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  *)

 

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   for ELEMENT in $PATH; do

 

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    if [ -z "$ELEMENT" ]; then

 

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     ELEMENT=.

 

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    fi

 

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    if [ -f "$ELEMENT/$PROGRAM" ] && [ -x "$ELEMENT/$PROGRAM" ]; then

 

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     printf '%s\n' "$ELEMENT/$PROGRAM"

 

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     RET=0

 

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     [ "$ALLMATCHES" -eq 1 ] || break

 

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    fi

 

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   done

 

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   ;;

 

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 esac

 

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 IFS="$IFS_SAVE"

 

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 if [ "$RET" -ne 0 ]; then

 

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  ALLRET=1

 

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 fi

 

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done

 

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exit "$ALLRET"

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