Re: Problem compiling kernel using fakeroot

17 Mar 2021

      I dont use git.

I wget the kernel and signature from kernel.org to my home directory. 
Then cp the verified and unpacked tar file to /usr/src. In there the 
usual sudo make -j4 all, sudo make modules install. Copy the System-map 
and arch/x86/boot/bzImage to /boot. And finally edit and run lilo.

This has always worked without any problem but if I try to reproduce 
those steps but doing the compilation phase with my user (or even 
fakeroot) in my /home dir, always results in a corrupted xz image error 
when i boot.

I suspected it was ownership issues compiling as regular user but not 
sure about that anymore.

On 3/17/21 2:37 PM, Steffen Nurpmeso wrote:
...
Erich Eckner wrote in
  <a44ccda3-bfd9-32d3-bb91-446a5d93a7@eckner.net>:
  |On Wed, 17 Mar 2021, Prophet wrote:
  |> Sorry for this newbie question.
  |
  |nothing to be sorry for.
  |
  |> Not sure if this is related to Crux but I always compiled the kernel \
  |> using
  |> sudo and never had any problems. Recently decided to try fakeroot \
  |> and always
  |> get corrupted xz image at boot. Is the kernel supposed to be always \
  |> compiled
  |> as root in Crux? What am I missing here?
  |
  |You should be able to compile the kernel as any user (no need for
  |fakeroot). The installation requires root, though (assuming, /boot is
  |owned by root, as it should be). I'm doing as a regular user:
  |
  |make oldconfig
  |make
  |
  |and then run as root:
  |
  |install -m644 --owner=root $kernelImage /boot/vmlinuz-$version
  |grub-mkconfig -o /boot/grub/grub.cfg
Yeah -- maybe the wrong (uncompressed) kernel?
|Note, that I do not have an initramdisk, but it should work similarily if
  |you have one.
Me neither (yet).  I compile the kernel as "ports":
hn=$(uname -n) ln=linux-version-as-major-minor
   objdir=/tmp/linuxobj
cp /root/hosts/$hn/linux-$ln.config \
      /usr/src/linux-$ln/.$hn-$ln.config || exit 2
   chown ports:ports /usr/src/linux-$ln/.$hn-$ln.config || exit 3
[ -x /root/bin/cpupower.sh ] && /root/bin/cpupower.sh hi
   sudo -u ports sh -c '
      (
      objdir='$objdir'
      cd /usr/src/linux-'$ln' || exit 10
      if [ -d $objdir ]; then
         if [ -n "$_cleanup" ]; then
            ( cd $objdir && make mrproper )
         fi
      else
         mkdir -p $objdir || exit 1
      fi
      printf -- "-'$hn'\n" > $objdir/localversion-build || exit 3
      cp .'$hn-$ln'.config $objdir/.config || exit 2
      #sudo -u ports make O=$objdir listnewconfig oldconfig || exit 4
      # Documentation/admin-guide/README.rst: "make localmodconfig"
      #[lsmod>f; LSMOD=f ]make O=$objdir localyesconfig oldconfig || exit 4
      nice -n +10 make O=$objdir oldconfig || exit 4
      cd $objdir || exit 5
      time nice -n +10 make -j`getconf _NPROCESSORS_ONLN`
      ) 2>&1
   '
   [ -x /root/bin/cpupower.sh ] && /root/bin/cpupower.sh default
followed by (well it is all optional ;) copies as "root":
cp $objdir/arch/x86/boot/bzImage $efipart/$hn-$xln-new.efi
    cp $objdir/System.map $efipart/System.map-$version-$hn
   ...
    make modules_install
(none, actually)
|What exactly are you trying, that fails? I had problems in the past with
  |left-over files from previous compilations - a `git clean -xdf .` did
  |help, there.
cleanup is then
if [ -n "$_cleanup" ]; then
      rm -rf /tmp/.$hn-fw
      if [ "${objdir%/*}" = /tmp ]; then
         rm -rf $objdir
      else
         (
         cd $objdir
         make mrproper
         ) >/dev/null
      fi
   fi
Anyhow, kernel building is not yet boxed.
I use efibootmgr:
if [ -n "$_efiactive" ]; then
       if command -v efibootmgr >/dev/null 2>&1 &&
             { efibootmgr | grep -q $hn-$ln-new; }; then
          bn=`efibootmgr | grep $hn-$ln-new |
                sed -Ee 's/^Boot([[:digit:]]+).+$/\1/'`
          efibootmgr -v -n $bn
       fi
    fi
Well i install the kernel as -new, and boot it once.  When booting
succeeds with the right kernel, it is moved automatically:
{
       i=1
       while :; do
          (
             set -C
             : > /root/hosts/$hn/.rc-late-hook-$i
          ) >/dev/null 2>&1 && break
          i=$((i + 1))
       done
printf "
          v=\`uname -r | cut -d- -f1\`
          if [ \"\$v\" = \"$version\" ]; then
             if [ "$efipart" != /boot ];then
                mount $efipart
             else
                mount -o remount,rw "$efipart"
             fi
             [ -f $efipart/$hn-$xln-new.efi ] &&
                mv -f $efipart/$hn-$xln-new.efi $efipart/$hn-$xln.efi
             if [ "$efipart" != /boot ]; then
                umount $efipart
             else
                mount -o remount,ro "$efipart"
             fi
             exit 0
          else
             echo >&2 'NOT moving kernel on EFI ('$efipart')!'
             exit 1
          fi
       " > /root/hosts/$hn/.rc-late-hook-$i
    }
Works pretty nice in practice ever since.
Yay!
--steffen
|
|Der Kragenbaer,                The moon bear,
|der holt sich munter           he cheerfully and one by one
|einen nach dem anderen runter  wa.ks himself off
|(By Robert Gernhardt)
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