245 lines
6.6 KiB
Bash
245 lines
6.6 KiB
Bash
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#!/bin/sh
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### BEGIN INIT INFO
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# Provides: volatile
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# Required-Start: $local_fs
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# Required-Stop: $local_fs
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# Default-Start: S
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# Default-Stop:
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# Short-Description: Populate the volatile filesystem
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### END INIT INFO
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# Get ROOT_DIR
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DIRNAME=`dirname $0`
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ROOT_DIR=`echo $DIRNAME | sed -ne 's:/etc/.*::p'`
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[ -e ${ROOT_DIR}/etc/default/rcS ] && . ${ROOT_DIR}/etc/default/rcS
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# When running populate-volatile.sh at rootfs time, disable cache.
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[ -n "$ROOT_DIR" ] && VOLATILE_ENABLE_CACHE=no
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# If rootfs is read-only, disable cache.
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[ "$ROOTFS_READ_ONLY" = "yes" ] && VOLATILE_ENABLE_CACHE=no
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CFGDIR="${ROOT_DIR}/etc/default/volatiles"
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TMPROOT="${ROOT_DIR}/var/volatile/tmp"
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COREDEF="00_core"
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[ "${VERBOSE}" != "no" ] && echo "Populating volatile Filesystems."
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create_file() {
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EXEC=""
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[ -z "$2" ] && {
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EXEC="
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touch \"$1\";
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"
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} || {
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EXEC="
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cp \"$2\" \"$1\";
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"
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}
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EXEC="
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${EXEC}
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chown ${TUSER}.${TGROUP} $1 || echo \"Failed to set owner -${TUSER}- for -$1-.\" >/dev/tty0 2>&1;
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chmod ${TMODE} $1 || echo \"Failed to set mode -${TMODE}- for -$1-.\" >/dev/tty0 2>&1 "
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test "$VOLATILE_ENABLE_CACHE" = yes && echo "$EXEC" >> /etc/volatile.cache.build
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[ -e "$1" ] && {
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[ "${VERBOSE}" != "no" ] && echo "Target already exists. Skipping."
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} || {
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if [ -z "$ROOT_DIR" ]; then
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eval $EXEC
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else
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# Creating some files at rootfs time may fail and should fail,
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# but these failures should not be logged to make sure the do_rootfs
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# process doesn't fail. This does no harm, as this script will
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# run on target to set up the correct files and directories.
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eval $EXEC > /dev/null 2>&1
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fi
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}
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}
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mk_dir() {
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EXEC="
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mkdir -p \"$1\";
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chown ${TUSER}.${TGROUP} $1 || echo \"Failed to set owner -${TUSER}- for -$1-.\" >/dev/tty0 2>&1;
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chmod ${TMODE} $1 || echo \"Failed to set mode -${TMODE}- for -$1-.\" >/dev/tty0 2>&1 "
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test "$VOLATILE_ENABLE_CACHE" = yes && echo "$EXEC" >> /etc/volatile.cache.build
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[ -e "$1" ] && {
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[ "${VERBOSE}" != "no" ] && echo "Target already exists. Skipping."
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} || {
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if [ -z "$ROOT_DIR" ]; then
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eval $EXEC
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else
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# For the same reason with create_file(), failures should
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# not be logged.
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eval $EXEC > /dev/null 2>&1
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fi
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}
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}
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link_file() {
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EXEC="
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if [ -L \"$2\" ]; then
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[ \"\$(readlink -f \"$2\")\" != \"$1\" ] && { rm -f \"$2\"; ln -sf \"$1\" \"$2\"; };
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elif [ -d \"$2\" ]; then
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if awk '\$2 == \"$2\" {exit 1}' /proc/mounts; then
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cp -a $2/* $1 2>/dev/null;
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cp -a $2/.[!.]* $1 2>/dev/null;
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rm -rf \"$2\";
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ln -sf \"$1\" \"$2\";
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fi
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else
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ln -sf \"$1\" \"$2\";
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fi
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"
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test "$VOLATILE_ENABLE_CACHE" = yes && echo " $EXEC" >> /etc/volatile.cache.build
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if [ -z "$ROOT_DIR" ]; then
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eval $EXEC
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else
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# For the same reason with create_file(), failures should
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# not be logged.
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eval $EXEC > /dev/null 2>&1
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fi
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}
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check_requirements() {
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cleanup() {
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rm "${TMP_INTERMED}"
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rm "${TMP_DEFINED}"
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rm "${TMP_COMBINED}"
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}
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CFGFILE="$1"
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[ `basename "${CFGFILE}"` = "${COREDEF}" ] && return 0
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TMP_INTERMED="${TMPROOT}/tmp.$$"
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TMP_DEFINED="${TMPROOT}/tmpdefined.$$"
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TMP_COMBINED="${TMPROOT}/tmpcombined.$$"
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sed 's@\(^:\)*:.*@\1@' ${ROOT_DIR}/etc/passwd | sort | uniq > "${TMP_DEFINED}"
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cat ${CFGFILE} | grep -v "^#" | cut -s -d " " -f 2 > "${TMP_INTERMED}"
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cat "${TMP_DEFINED}" "${TMP_INTERMED}" | sort | uniq > "${TMP_COMBINED}"
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NR_DEFINED_USERS="`cat "${TMP_DEFINED}" | wc -l`"
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NR_COMBINED_USERS="`cat "${TMP_COMBINED}" | wc -l`"
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[ "${NR_DEFINED_USERS}" -ne "${NR_COMBINED_USERS}" ] && {
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echo "Undefined users:"
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diff "${TMP_DEFINED}" "${TMP_COMBINED}" | grep "^>"
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cleanup
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return 1
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}
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sed 's@\(^:\)*:.*@\1@' ${ROOT_DIR}/etc/group | sort | uniq > "${TMP_DEFINED}"
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cat ${CFGFILE} | grep -v "^#" | cut -s -d " " -f 3 > "${TMP_INTERMED}"
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cat "${TMP_DEFINED}" "${TMP_INTERMED}" | sort | uniq > "${TMP_COMBINED}"
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NR_DEFINED_GROUPS="`cat "${TMP_DEFINED}" | wc -l`"
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NR_COMBINED_GROUPS="`cat "${TMP_COMBINED}" | wc -l`"
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[ "${NR_DEFINED_GROUPS}" -ne "${NR_COMBINED_GROUPS}" ] && {
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echo "Undefined groups:"
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diff "${TMP_DEFINED}" "${TMP_COMBINED}" | grep "^>"
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cleanup
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return 1
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}
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# Add checks for required directories here
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cleanup
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return 0
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}
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apply_cfgfile() {
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CFGFILE="$1"
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check_requirements "${CFGFILE}" || {
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echo "Skipping ${CFGFILE}"
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return 1
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}
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cat ${CFGFILE} | sed 's/#.*//' | \
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while read TTYPE TUSER TGROUP TMODE TNAME TLTARGET; do
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test -z "${TLTARGET}" && continue
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TNAME=${ROOT_DIR}${TNAME}
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[ "${VERBOSE}" != "no" ] && echo "Checking for -${TNAME}-."
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[ "${TTYPE}" = "l" ] && {
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TSOURCE="$TLTARGET"
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[ "${VERBOSE}" != "no" ] && echo "Creating link -${TNAME}- pointing to -${TSOURCE}-."
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link_file "${TSOURCE}" "${TNAME}"
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continue
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}
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[ "${TTYPE}" = "b" ] && {
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TSOURCE="$TLTARGET"
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[ "${VERBOSE}" != "no" ] && echo "Creating mount-bind -${TNAME}- from -${TSOURCE}-."
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mount --bind "${TSOURCE}" "${TNAME}"
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EXEC="
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mount --bind \"${TSOURCE}\" \"${TNAME}\""
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test "$VOLATILE_ENABLE_CACHE" = yes && echo "$EXEC" >> /etc/volatile.cache.build
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continue
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}
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[ -L "${TNAME}" ] && {
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[ "${VERBOSE}" != "no" ] && echo "Found link."
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NEWNAME=`ls -l "${TNAME}" | sed -e 's/^.*-> \(.*\)$/\1/'`
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echo ${NEWNAME} | grep -v "^/" >/dev/null && {
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TNAME="`echo ${TNAME} | sed -e 's@\(.*\)/.*@\1@'`/${NEWNAME}"
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[ "${VERBOSE}" != "no" ] && echo "Converted relative linktarget to absolute path -${TNAME}-."
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} || {
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TNAME="${NEWNAME}"
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[ "${VERBOSE}" != "no" ] && echo "Using absolute link target -${TNAME}-."
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}
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}
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case "${TTYPE}" in
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"f") [ "${VERBOSE}" != "no" ] && echo "Creating file -${TNAME}-."
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TSOURCE="$TLTARGET"
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[ "${TSOURCE}" = "none" ] && TSOURCE=""
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create_file "${TNAME}" "${TSOURCE}" &
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;;
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"d") [ "${VERBOSE}" != "no" ] && echo "Creating directory -${TNAME}-."
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mk_dir "${TNAME}"
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# Add check to see if there's an entry in fstab to mount.
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;;
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*) [ "${VERBOSE}" != "no" ] && echo "Invalid type -${TTYPE}-."
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continue
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;;
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esac
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done
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return 0
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}
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clearcache=0
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exec 9</proc/cmdline
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while read line <&9
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do
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case "$line" in
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*clearcache*) clearcache=1
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;;
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*) continue
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;;
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esac
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done
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exec 9>&-
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if test -e ${ROOT_DIR}/etc/volatile.cache -a "$VOLATILE_ENABLE_CACHE" = "yes" -a "x$1" != "xupdate" -a "x$clearcache" = "x0"
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then
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sh ${ROOT_DIR}/etc/volatile.cache
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else
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rm -f ${ROOT_DIR}/etc/volatile.cache ${ROOT_DIR}/etc/volatile.cache.build
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for file in `ls -1 "${CFGDIR}" | sort`; do
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apply_cfgfile "${CFGDIR}/${file}"
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done
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[ -e ${ROOT_DIR}/etc/volatile.cache.build ] && sync && mv ${ROOT_DIR}/etc/volatile.cache.build ${ROOT_DIR}/etc/volatile.cache
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fi
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if [ -z "${ROOT_DIR}" ] && [ -f /etc/ld.so.cache ] && [ ! -f /var/run/ld.so.cache ]
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then
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ln -s /etc/ld.so.cache /var/run/ld.so.cache
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fi
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