vp-build/xbps-src/triggers/register-shell

#!/bin/sh -e
#
# Registers or unregisters a shell in /etc/shells.
#
# Arguments:	$ACTION = [run/targets]
#		$TARGET = [post-install/post-remove]
#		$PKGNAME
#		$VERSION
#		$UPDATE = [yes/no]
#
ACTION="$1"
TARGET="$2"
PKGNAME="$3"
VERSION="$4"
UPDATE="$5"

case "$ACTION" in
targets)
	echo "post-install post-remove"
	;;
run)
	[ "$TARGET" != "post-install" -a "$TARGET" != "post-remove" ] && exit 1

	if [ -z "$register_shell" ]; then
		echo "Trigger register-shell: empty \$register_shell!"
		exit 1
	fi

	case "$TARGET" in
	post-install)
		if [ ! -f etc/shells ]; then
			for f in ${register_shell}; do
				echo $f >> etc/shells
				echo "Registered $f into /etc/shells."
			done
			chmod 644 etc/shells
		else
			for f in ${register_shell}; do
				if ! grep -q $f etc/shells; then
					echo $f >> etc/shells
					echo -n "Registered $f into "
					echo "/etc/shells."
				fi
			done
		fi
		;;
	post-remove)
		if [ -f etc/shells ]; then
			for f in ${register_shell}; do
				if grep -q $f etc/shells; then
					shell=$(echo $f|sed "s|\\/|\\\/|g")
					sed -i -e "/$shell/d" etc/shells
					echo -n "Unregistered $f from "
					echo "/etc/shells."
				fi
			done
		fi
		;;
	esac
	;;
*)
	exit 1
	;;
esac

exit 0