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# Make sure mtab in the chroot reflects the currently mounted partitions.
update_mtab_procfs() {
grep "$ROOT" /proc/mounts | (
while read devpath mountpoint fstype options n1 n2 ; do
devpath=`mapdevfs $devpath || echo $devpath`
mountpoint=`echo $mountpoint | sed "s%^$ROOT%%"`
# The sed line removes the mount point for root.
if [ -z "$mountpoint" ] ; then
mountpoint="/"
fi
echo $devpath $mountpoint $fstype $options $n1 $n2
done ) > $mtab
}
# No /proc/mounts available, build one (Hurd)
update_mtab_scratch() {
echo "$rootfs / $rootfstype defaults 0 1" > $mtab
if [ "$bootfs" != "$rootfs" ]; then
echo "$bootfs /boot $bootfstype defaults 0 2" >> $mtab
fi
}
update_mtab() {
[ "$ROOT" ] || return 0
[ ! -h "$ROOT/etc/mtab" ] || return 0
mtab=$ROOT/etc/mtab
if [ -e /proc/mounts ]; then
update_mtab_procfs
else
update_mtab_scratch
fi
}
is_floppy () {
echo "$1" | grep -q '(fd' || echo "$1" | grep -q "/dev/fd" || echo "$1" | grep -q floppy
}
log () {
logger -t grub-installer "$*${DEBCONF_DEBUG:+ [${0##*/}]}"
}
error () {
log "error: $*"
}
info() {
log "info: $*"
}
debug () {
[ -z "${DEBCONF_DEBUG}" ] || log "debug: $*"
}
die () {
local template="$1" ; shift
local fstype="$1" ; shift
local path="$1" ; shift
error "$@"
db_subst "$template" FSTYPE "$fstype"
db_subst "$template" PATH "$path"
db_input critical "$template" || [ $? -eq 30 ]
db_go || true
exit 1
}
# on_exit() takes a command, and pushes it onto a stack of commands, which
# are later executed by perform_exit_stack() (via trap) in LIFO order.
EXIT_STACK=""
on_exit() {
if [ 1 != $# ]; then
error "$0: on_exit() expects exactly 1 argument, but was given $# ${*:+(args:$(printf " [%s]" "$@"))}"
exit 1
fi
EXIT_STACK=$(printf '%s\n%s' "$1" "$EXIT_STACK")
}
perform_exit_stack () {
printf '%s\n' "$EXIT_STACK" | \
while read -r cmd; do
debug "perform_exit_stack(): Running \"$cmd\""
eval "$cmd" || info "attempt to run \"$cmd\" failed [$?] when exiting \"$0\" (non-fatal)"
done
debug "perform_exit_stack(): exiting \"$0\""
}
trap perform_exit_stack HUP INT QUIT KILL PIPE TERM EXIT
mountvirtfs () {
fstype="$1"
path="$2"
failure_response="${3:-fatal}"
if grep -q "[[:space:]]$fstype\$" /proc/filesystems && \
! grep -q "^[^ ]\+ \+$path " /proc/mounts; then
if mkdir -p "$path"; then
if mount -t "$fstype" "$fstype" "$path"; then
log "Success mounting $path"
on_exit "umount '$path'"
return
else
failed_action="Mounting"
fi
else
failed_action="Creating"
fi
log_msg="$failed_action '$path' failed ($failure_response error)"
# if here, a failure has occured (otherwise would 'return' above)
if [ "$failure_response" != "fatal" ]; then
info "$log_msg"
else
die grub-installer/mounterr "$fstype" "$path" "$log_msg"
fi
fi
}
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