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¥ˆ¿ã 0¾á " §ˆl–Ým_JÅ4Ÿº‚ \P Üd %1hßä ƒm÷Û¿â k §#!/bin/sh # dash shell does not have "{varname}>&1" feature that bash shell has # for auto-assignment of new filedescriptors. # It is cumbersome to write the 'eval' to use our own variables in redirections. # Therefore use fixed numbers. export fd_result=3 # file descriptor for external results export fd_logger=9 # file descriptor for input to logger . /usr/share/os-prober/common.sh set -e newns "$@" require_tmpdir ERR="n" tmpmnt=/var/lib/os-prober/mount if [ ! -d "$tmpmnt" ]; then mkdir "$tmpmnt" fi mounted= bootmnt= bootsv= bootuuid= grep "^/dev/" /proc/mounts | parse_proc_mounts >"$OS_PROBER_TMP/mounted-map" || true if [ -z "$1" ]; then ERR=y elif [ "$1" = btrfs -a -z "$2" ]; then ERR=y elif [ "$1" = btrfs -a -z "$3" ]; then ERR=y elif [ "$1" = btrfs ]; then type=btrfs echo "$2" | grep -q "^UUID=" || ERR=y echo "$3" | grep -q "^subvol=" || ERR=y export "$2" export "$3" partition=$(blkid | grep "$UUID" | cut -d ':' -f 1 | tr '\n' ' ' | cut -d ' ' -f 1) debug "btrfs: partition=$partition, UUID=$UUID, subvol=$subvol" else partition="$1" type=other fi if [ "x$ERR" != xn ]; then echo "usage: linux-boot-prober partition" >&2 echo " linux-boot-prober btrfs UUID=<> subvol=<>" >&2 exit 1 fi if [ "$type" = btrfs ]; then # handle all of the btrfs stuff here if [ ! -e "/proc/self/mountinfo" ]; then warn "/proc/self/mountinfo does not exist, exiting" umount "$tmpmnt" 2>/dev/null rmdir "$tmpmnt" 2>/dev/null exit 1 fi mpoint=$(grep "btrfs" /proc/self/mountinfo | grep " /$subvol " | grep " $partition " | cut -d ' ' -f 5) if [ "$mpoint" = "/" ]; then warn "specifying active root not valid, exiting" umount "$tmpmnt" 2>/dev/null rmdir "$tmpmnt" 2>/dev/null exit 1 fi if [ "$mpoint" = "$tmpmnt" ]; then warn "btrfs subvol=$subvool, UUID=$UUID, already mounted on $tmpmnt **ERROR**" umount "$tmpmnt" 2>/dev/null rmdir "$tmpmnt" 2>/dev/null exit 1 fi if [ -z "$mpoint" ]; then # mount the btrfs root if ! mount -o subvol=$subvol -t btrfs -U $UUID "$tmpmnt" 2>/dev/null; then warn "error mounting btrfs subvol=$subvol UUID=$UUID" umount "$tmpmnt/boot" 2>/dev/null umount "$tmpmnt" 2>/dev/null rmdir "$tmpmnt" 2>/dev/null exit 1 fi else # bind-mount if ! mount -o bind "$mpoint" "$tmpmnt" 2>/dev/null; then warn "error mounting btrfs bindfrom=$mpoint subvol=$subvol UUID=$UUID" umount "$tmpmnt/boot" 2>/dev/null umount "$tmpmnt" 2>/dev/null rmdir "$tmpmnt" 2>/dev/null exit 1 fi fi debug "mounted btrfs $partition, subvol=$subvol on $tmpmnt" if [ ! -e "$tmpmnt/etc/fstab" ]; then warn "btrfs subvol=$subvol not root" umount "$tmpmnt" 2>/dev/null rmdir "$tmpmnt" 2>/dev/null exit 1 fi bootmnt=$(parsefstab < "$tmpmnt/etc/fstab" | grep " /boot ") || true if [ -z "$bootmnt" ]; then # /boot is part of the root bootpart="$partition" bootsv="$subvol" elif echo "$bootmnt" | cut -d ' ' -f 3 | grep -q "btrfs"; then # separate btrfs /boot subvolume bootsv=$(echo "$bootmnt" | cut -d ' ' -f 4 | grep "^subvol=" | sed "s/subvol=//" ) bootuuid=$(echo "$bootmnt" | cut -d ' ' -f 1 | grep "^UUID=" | sed "s/UUID=//" ) debug "mounting btrfs $tmpmnt/boot