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|
#!/bin/sh
. /etc/default/rcS
CFGDIR="/etc/default/volatiles"
TMPROOT="/var/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
[ -e "$1" ] && {
[ "${VERBOSE}" != "no" ] && echo "Target already exists. Skipping."
} || {
eval $EXEC
}
}
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
[ -e "$1" ] && {
[ "${VERBOSE}" != "no" ] && echo "Target already exists. Skipping."
} || {
eval $EXEC
}
}
link_file() {
EXEC="test -e \"$2\" -o -L $2 || ln -s \"$1\" \"$2\" >/dev/tty0 2>&1"
test "$VOLATILE_ENABLE_CACHE" = yes && echo " $EXEC" >> /etc/volatile.cache
[ -e "$2" ] && {
echo "Cannot create link over existing -${TNAME}-." >&2
} || {
eval $EXEC
}
}
check_requirements() {
cleanup() {
rm "${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.$$"
cat /etc/passwd | sed 's@\(^:\)*:.*@\1@' | sort | uniq > "${TMP_DEFINED}"
cat ${CFGFILE} | grep -v "^#" | cut -d " " -f 2 > "${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
}
cat /etc/group | sed 's@\(^:\)*:.*@\1@' | sort | uniq > "${TMP_DEFINED}"
cat ${CFGFILE} | grep -v "^#" | cut -d " " -f 3 > "${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"`
[ "${VERBOSE}" != "no" ] && echo "Checking for -${TNAME}-."
[ "${TTYPE}" = "l" ] && {
TSOURCE="$TLTARGET"
[ -L "${TNAME}" ] || {
[ "${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
}
SKEL_DIR="/etc/volatile/skel"
skel_mount() {
VOLATILE="$1"
[ -d "$VOLATILE" ] || mkdir -p "$VOLATILE"
mount -t tmpfs volatile "$VOLATILE" -omode=0755
}
skel_load() {
VOLATILE="$1"
if ! skel_mount "$VOLATILE"; then
echo "failed to mount $VOLATILE"
return 1
fi
cp -a "$SKEL_DIR"/* "$VOLATILE"/
}
skel_update() {
VOLATILE="$1"
if ! skel_mount "$VOLATILE"; then
echo "failed to update"
return 1
fi
echo -n "Populating volatile directory..."
for file in `ls -1 "${CFGDIR}" | sort`; do
apply_cfgfile "${CFGDIR}/${file}"
done
echo "done"
if [ -d "$SKEL_DIR" ]; then
rm -rf "$SKEL_DIR"
fi
mkdir -p "$SKEL_DIR"/tmp
cp -a "$VOLATILE"/* "$SKEL_DIR"/
}
populate() {
if [ -d "$SKEL_DIR"/tmp ]; then
skel_load /var/volatile
else
skel_update /var/volatile
fi
for d in /var/volatile/*
do
ln -sf "$d" /var
done
if ! test -L /tmp; then
rm -rf /tmp
ln -sf /var/tmp /tmp
fi
}
case "$1" in
start)
if grep -q "^volatile " /proc/mounts; then
echo "volatile directory is already mounted"
else
populate
fi
;;
stop)
: # no-op
;;
update)
if skel_update /var/volatile; then
umount /var/volatile
if grep -q "^volatile " /proc/mounts; then
cp -a "$SKEL_DIR"/* /var/volatile
fi
fi
;;
*)
echo "Usage: /etc/init.d/populate-volatile {start|stop|update}"
;;
esac
: exit 0
|
