/usr/lib/live/build/chroot_hosts is in open-infrastructure-system-build 20161101-lts2-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97  | #!/bin/sh
## live-build(7) - System Build Scripts
## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
##
## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.
set -e
# Including common functions
[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
# Setting static variables
DESCRIPTION="$(Echo 'manage /etc/hosts')"
HELP=""
USAGE="${PROGRAM} {install|remove} [--force]"
Arguments "${@}"
# Reading configuration files
Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
Set_defaults
# Requiring stage file
Require_stagefile .build/config .build/bootstrap
case "${1}" in
	install)
		Echo_message "Configuring file /etc/hosts"
		# Checking stage file
		Check_stagefile .build/chroot_hosts
		# Checking lock file
		Check_lockfile .lock
		# Creating lock file
		Create_lockfile .lock
		if [ -f chroot/etc/hosts ]
		then
			# Save hosts file
			mv chroot/etc/hosts chroot/etc/hosts.orig
		fi
		# Creating hosts file
cat > chroot/etc/hosts << EOF
127.0.0.1	localhost localhost.localdomain
127.0.1.1	debian
EOF
		if [ -f /etc/hosts ]
		then
			# Append hosts file
			#grep -e "127.0.0.1" -e "127.0.1.1" /etc/hosts >> chroot/etc/hosts
			cat /etc/hosts >> chroot/etc/hosts
		fi
		# Creating stage file
		Create_stagefile .build/chroot_hosts
		;;
	remove)
		Echo_message "Deconfiguring file /etc/hosts"
		# Checking lock file
		Check_lockfile .lock
		# Creating lock file
		Create_lockfile .lock
		if [ -e config/includes.chroot/etc/hosts ]
		then
			# Copying local hosts
			cp -a config/includes.chroot/etc/hosts chroot/etc/hosts
			rm -f chroot/etc/hosts.orig
		elif [ -f chroot/etc/hosts.orig ]
		then
			# Restore hosts file
			mv chroot/etc/hosts.orig chroot/etc/hosts
		else
			# Blank out hosts file, don't remove in case its a symlink
			Truncate chroot/etc/hosts
		fi
		# Removing stage file
		rm -f .build/chroot_hosts
		;;
	*)
		Usage
		;;
esac
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