Differential D18578 Diff 52080 contrib/openrc/sh/binfmt.sh.in

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contrib/openrc/sh/binfmt.sh.in

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				#!@SHELL@
				# This is a reimplementation of the systemd binfmt.d code to register
				# misc binary formats with the kernel.
				#
				# See the binfmt.d manpage as well:
				# http://0pointer.de/public/systemd-man/binfmt.d.html
				# This script should match the manpage as of 2015/03/31

				# Copyright (c) 2015 The OpenRC Authors.
				# See the Authors file at the top-level directory of this distribution and
				# https://github.com/OpenRC/openrc/blob/master/AUTHORS
				#
				# This file is part of OpenRC. It is subject to the license terms in
				# the LICENSE file found in the top-level directory of this
				# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
				# This file may not be copied, modified, propagated, or distributed
				# except according to the terms contained in the LICENSE file.
				apply_file() {
				[ $# -lt 1 ] && return 0
				FILE="$1"
				LINENUM=0

				### FILE FORMAT ###
				# See https://www.kernel.org/doc/Documentation/binfmt_misc.txt
				while read -r line; do
				LINENUM=$(( LINENUM+1 ))
				case $line in
				\#*) continue ;;
				\;*) continue ;;
				esac

				echo "${line}" > /proc/sys/fs/binfmt_misc/register
				rc=$?
				if [ $rc -ne 0 ]; then
				printf "binfmt: invalid entry on line %d of \`%s'\n" \
				"$LINENUM" "$FILE" >&2
				error=1
				fi
				done <$FILE
				return $rc
				}

				[ -e /proc/sys/fs/binfmt_misc/register ] \|\| exit 0
				error=0
				if [ $# -gt 0 ]; then
				while [ $# -gt 0 ]; do
				apply_file "$1"
				shift
				done
				else
				# The hardcoding of these paths is intentional; we are following the
				# systemd spec.
				binfmt_dirs='/usr/lib/binfmt.d/ /run/binfmt.d/ /etc/binfmt.d/'
				binfmt_basenames=''
				binfmt_d=''

				# Build a list of sorted unique basenames
				# directories declared later in the binfmt_d list will override earlier
				# directories, on a per file basename basis.
				# `/run/binfmt.d/foo.conf' supersedes `/usr/lib/binfmt.d/foo.conf'.
				# `/run/binfmt.d/foo.conf' will always be read after `/etc/binfmt.d/bar.conf'
				for d in ${binfmt_dirs} ; do
				[ -d $d ] && for f in ${d}/*.conf ; do
				case "${f##*/}" in
				systemd.conf\|systemd-*.conf) continue;;
				esac
				[ -e $f ] && binfmt_basenames="${binfmt_basenames}\n${f##*/}"
				done # for f in ${d}
				done # for d in ${binfmt_dirs}
				binfmt_basenames="$(printf "${binfmt_basenames}\n" \| sort -u )"

				for b in $binfmt_basenames ; do
				real_f=''
				for d in $binfmt_dirs ; do
				f=${d}/${b}
				[ -e "${f}" ] && real_f=$f
				done
				[ -e "${real_f}" ] && binfmt_d="${binfmt_d} ${real_f}"
				done

				# loop through the gathered fragments, sorted globally by filename.
				# `/run/binfmt.d/foo.conf' will always be read after `/etc/binfmt.d/bar.conf'
				for FILE in $binfmt_d ; do
				apply_file "$FILE"
				done
				fi

				exit $error

				# vim: set ts=2 sw=2 sts=2 noet ft=sh: