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#!/bin/sh
### BEGIN INIT INFO
# Provides: volatile
# Required-Start: $local_fs
# Required-Stop: $local_fs
# Default-Start: S
# Default-Stop:
# Short-Description: Populate the volatile filesystem
### END INIT INFO
# Get ROOT_DIR
DIRNAME=`dirname $0`
ROOT_DIR=`echo $DIRNAME | sed -ne 's:/etc/.*::p'`
[ -e ${ROOT_DIR}/etc/default/rcS ] && . ${ROOT_DIR}/etc/default/rcS
# When running populate-volatile.sh at rootfs time, disable cache.
[ -n "$ROOT_DIR" ] && VOLATILE_ENABLE_CACHE=no
# If rootfs is read-only, disable cache.
[ "$ROOTFS_READ_ONLY" = "yes" ] && VOLATILE_ENABLE_CACHE=no
CFGDIR="${ROOT_DIR}/etc/default/volatiles"
TMPROOT="${ROOT_DIR}/var/volatile/tmp"
COREDEF="00_core"
[ "${VERBOSE}" != "no" ] && echo "Populating volatile Filesystems."
create_file() {
EXEC="
touch \"$1\";
chown ${TUSER}.${TGROUP} $1 || echo \"Failed to set owner -${TUSER}- for -$1-.\" >/dev/tty0 2>&1;
chmod ${TMODE} $1 || echo \"Failed to set mode -${TMODE}- for -$1-.\" >/dev/tty0 2>&1 "
test "$VOLATILE_ENABLE_CACHE" = yes && echo "$EXEC" >> /etc/volatile.cache.build
[ -e "$1" ] && {
[ "${VERBOSE}" != "no" ] && echo "Target already exists. Skipping."
} || {
if [ -z "$ROOT_DIR" ]; then
eval $EXEC &
else
# Creating some files at rootfs time may fail and should fail,
# but these failures should not be logged to make sure the do_rootfs
# process doesn't fail. This does no harm, as this script will
# run on target to set up the correct files and directories.
eval $EXEC > /dev/null 2>&1
fi
}
}
mk_dir() {
EXEC="
mkdir -p \"$1\";
chown ${TUSER}.${TGROUP} $1 || echo \"Failed to set owner -${TUSER}- for -$1-.\" >/dev/tty0 2>&1;
chmod ${TMODE} $1 || echo \"Failed to set mode -${TMODE}- for -$1-.\" >/dev/tty0 2>&1 "
test "$VOLATILE_ENABLE_CACHE" = yes && echo "$EXEC" >> /etc/volatile.cache.build
[ -e "$1" ] && {
[ "${VERBOSE}" != "no" ] && echo "Target already exists. Skipping."
} || {
if [ -z "$ROOT_DIR" ]; then
eval $EXEC
else
# For the same reason with create_file(), failures should
# not be logged.
eval $EXEC > /dev/null 2>&1
fi
}
}
link_file() {
EXEC="
if [ -L \"$2\" ]; then
[ \"\$(readlink -f \"$2\")\" != \"\$(readlink -f \"$1\")\" ] && { rm -f \"$2\"; ln -sf \"$1\" \"$2\"; };
elif [ -d \"$2\" ]; then
if awk '\$2 == \"$2\" {exit 1}' /proc/mounts; then
cp -a $2/* $1 2>/dev/null;
cp -a $2/.[!.]* $1 2>/dev/null;
rm -rf \"$2\";
ln -sf \"$1\" \"$2\";
fi
else
ln -sf \"$1\" \"$2\";
fi
"
test "$VOLATILE_ENABLE_CACHE" = yes && echo " $EXEC" >> /etc/volatile.cache.build
if [ -z "$ROOT_DIR" ]; then
eval $EXEC &
else
# For the same reason with create_file(), failures should
# not be logged.
eval $EXEC > /dev/null 2>&1
fi
}
check_requirements() {
cleanup() {
rm "${TMP_INTERMED}"
rm "${TMP_DEFINED}"
rm "${TMP_COMBINED}"
}
CFGFILE="$1"
[ `basename "${CFGFILE}"` = "${COREDEF}" ] && return 0
TMP_INTERMED="${TMPROOT}/tmp.$$"
TMP_DEFINED="${TMPROOT}/tmpdefined.$$"
TMP_COMBINED="${TMPROOT}/tmpcombined.$$"
sed 's@\(^:\)*:.*@\1@' ${ROOT_DIR}/etc/passwd | sort | uniq > "${TMP_DEFINED}"
cat ${CFGFILE} | grep -v "^#" | cut -s -d " " -f 2 > "${TMP_INTERMED}"
cat "${TMP_DEFINED}" "${TMP_INTERMED}" | sort | uniq > "${TMP_COMBINED}"
NR_DEFINED_USERS="`cat "${TMP_DEFINED}" | wc -l`"
NR_COMBINED_USERS="`cat "${TMP_COMBINED}" | wc -l`"
[ "${NR_DEFINED_USERS}" -ne "${NR_COMBINED_USERS}" ] && {
echo "Undefined users:"
diff "${TMP_DEFINED}" "${TMP_COMBINED}" | grep "^>"
cleanup
return 1
}
sed 's@\(^:\)*:.*@\1@' ${ROOT_DIR}/etc/group | sort | uniq > "${TMP_DEFINED}"
cat ${CFGFILE} | grep -v "^#" | cut -s -d " " -f 3 > "${TMP_INTERMED}"
cat "${TMP_DEFINED}" "${TMP_INTERMED}" | sort | uniq > "${TMP_COMBINED}"
NR_DEFINED_GROUPS="`cat "${TMP_DEFINED}" | wc -l`"
NR_COMBINED_GROUPS="`cat "${TMP_COMBINED}" | wc -l`"
[ "${NR_DEFINED_GROUPS}" -ne "${NR_COMBINED_GROUPS}" ] && {
echo "Undefined groups:"
diff "${TMP_DEFINED}" "${TMP_COMBINED}" | grep "^>"
cleanup
return 1
}
# Add checks for required directories here
cleanup
return 0
}
apply_cfgfile() {
CFGFILE="$1"
check_requirements "${CFGFILE}" || {
echo "Skipping ${CFGFILE}"
return 1
}
cat ${CFGFILE} | grep -v "^#" | \
while read LINE; do
eval `echo "$LINE" | sed -n "s/\(.*\)\ \(.*\) \(.*\)\ \(.*\)\ \(.*\)\ \(.*\)/TTYPE=\1 ; TUSER=\2; TGROUP=\3; TMODE=\4; TNAME=\5 TLTARGET=\6/p"`
TNAME=${ROOT_DIR}${TNAME}
[ "${VERBOSE}" != "no" ] && echo "Checking for -${TNAME}-."
[ "${TTYPE}" = "l" ] && {
TSOURCE="$TLTARGET"
[ "${VERBOSE}" != "no" ] && echo "Creating link -${TNAME}- pointing to -${TSOURCE}-."
link_file "${TSOURCE}" "${TNAME}"
continue
}
[ -L "${TNAME}" ] && {
[ "${VERBOSE}" != "no" ] && echo "Found link."
NEWNAME=`ls -l "${TNAME}" | sed -e 's/^.*-> \(.*\)$/\1/'`
echo ${NEWNAME} | grep -v "^/" >/dev/null && {
TNAME="`echo ${TNAME} | sed -e 's@\(.*\)/.*@\1@'`/${NEWNAME}"
[ "${VERBOSE}" != "no" ] && echo "Converted relative linktarget to absolute path -${TNAME}-."
} || {
TNAME="${NEWNAME}"
[ "${VERBOSE}" != "no" ] && echo "Using absolute link target -${TNAME}-."
}
}
case "${TTYPE}" in
"f") [ "${VERBOSE}" != "no" ] && echo "Creating file -${TNAME}-."
create_file "${TNAME}" &
;;
"d") [ "${VERBOSE}" != "no" ] && echo "Creating directory -${TNAME}-."
mk_dir "${TNAME}"
# Add check to see if there's an entry in fstab to mount.
;;
*) [ "${VERBOSE}" != "no" ] && echo "Invalid type -${TTYPE}-."
continue
;;
esac
done
return 0
}
clearcache=0
exec 9</proc/cmdline
while read line <&9
do
case "$line" in
*clearcache*) clearcache=1
;;
*) continue
;;
esac
done
exec 9>&-
if test -e ${ROOT_DIR}/etc/volatile.cache -a "$VOLATILE_ENABLE_CACHE" = "yes" -a "x$1" != "xupdate" -a "x$clearcache" = "x0"
then
sh ${ROOT_DIR}/etc/volatile.cache
else
rm -f ${ROOT_DIR}/etc/volatile.cache ${ROOT_DIR}/etc/volatile.cache.build
for file in `ls -1 "${CFGDIR}" | sort`; do
apply_cfgfile "${CFGDIR}/${file}"
done
[ -e ${ROOT_DIR}/etc/volatile.cache.build ] && sync && mv ${ROOT_DIR}/etc/volatile.cache.build ${ROOT_DIR}/etc/volatile.cache
fi
if [ -z "${ROOT_DIR}" ] && [ -f /etc/ld.so.cache ] && [ ! -f /var/run/ld.so.cache ]
then
ln -s /etc/ld.so.cache /var/run/ld.so.cache
fi
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