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debian-installer-utils 1.132%2Bdeb10u1
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#!/bin/sh
set -e
# A cut-down version of 'which' from debianutils. Returns zero if executable
# $1 is found on $PATH.
PROGRAM="$1"
IFS=:
RET=1
case $PROGRAM in
	*/*)
		if [ -f "$ELEMENT/$PROGRAM" ] && \
		   [ -x "$ELEMENT/$PROGRAM" ]; then
			exit 0
		fi
		;;
	*)
		for ELEMENT in $PATH; do
			if [ -z "$ELEMENT" ]; then ELEMENT=.; fi
			if [ -f "$ELEMENT/$PROGRAM" ] && \
			   [ -x "$ELEMENT/$PROGRAM" ]; then
				exit 0
			fi
		done
		;;
esac
exit 1