/usr/lib/live/build/chroot_hooks is in live-build 4.0.3-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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## live-build(7) - System Build Scripts
## Copyright (C) 2006-2014 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="$(Echo 'execute hooks in chroot')"
HELP=""
USAGE="${PROGRAM} [--force]"
Arguments "${@}"
# Reading configuration files
Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
Set_defaults
Echo_message "Begin executing hooks..."
# Requiring stage file
Require_stagefile .build/config .build/bootstrap
# Checking stage file
Check_stagefile .build/chroot_hooks
# Checking lock file
Check_lockfile .lock
# Creating lock file
Create_lockfile .lock
## Processing distribution hooks
# Make build config available to chroot hooks. First, make the bind
# mount and then make it read-only. This can't happen in one mount
# command, then the resulting mount will be rw (see mount(8)). Making it
# ro prevents modifications and prevents accidentally removing the
# contents of the config directory when removing the chroot.
mkdir -p chroot/live-build/config
mount -o bind config chroot/live-build/config
mount -o remount,ro,bind config chroot/live-build/config
# Copying hooks
for _HOOK in ${LB_CHROOT_HOOKS}
do
for LOCATION in "${LIVE_BUILD}/hooks" /usr/share/live/build/hooks
do
for FILE in "${LOCATION}"/????-"${_HOOK}".chroot
do
if [ -e "${FILE}" ]
then
mkdir -p chroot/root/lb_chroot_hooks
cp "${FILE}" chroot/root/lb_chroot_hooks
fi
done
done
done
# Running hooks
if ls chroot/root/lb_chroot_hooks/* > /dev/null 2>&1
then
for _HOOK in chroot/root/lb_chroot_hooks/*
do
Chroot chroot "/root/lb_chroot_hooks/$(basename ${_HOOK})" || { Echo_error "${_HOOK} failed (exit non-zero). You should check for errors."; exit 1 ;}
rm -f chroot/root/lb_chroot_hooks/"$(basename ${_HOOK})"
done
rmdir chroot/root/lb_chroot_hooks
fi
## Processing local hooks
if Find_files config/hooks/*.chroot
then
# Restoring cache
Restore_cache cache/packages.chroot
for _HOOK in config/hooks/*.chroot
do
# Copying hook
cp "${_HOOK}" chroot/root
# Making hook executable
if [ ! -x chroot/root/"$(basename ${_HOOK})" ]
then
chmod +x chroot/root/"$(basename ${_HOOK})"
fi
# Executing hook
Chroot chroot "/root/$(basename ${_HOOK})" || { Echo_error "${_HOOK} failed (exit non-zero). You should check for errors."; exit 1 ;}
# Removing hook
rm -f chroot/root/"$(basename ${_HOOK})"
done
# Saving cache
Save_cache cache/packages.chroot
# Creating stage file
Create_stagefile .build/chroot_hooks
fi
# Remove bind mount of build config inside chroot.
umount chroot/live-build/config
rmdir chroot/live-build/config
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