https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221550
Bug ID: 221550
Summary: kern.bootfile returns only /kernel on mips64 (ERL)
platform
Product: Base System
Version: CURRENT
Hardware: mips
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: l...@freebsd.org
The kern.bootfile sysctl returns just /kernel on an ERL, using the stock
configuration where the boot filesystem (a FAT32 filesystem) is mounted
into /boot.
root@erl2-148: df
Filesystem 1K-blocks Used Avail Capacity Mounted on
/dev/da0s2a 28810359 9965044 16540487 38% /
devfs 1 1 0 100% /dev
/dev/da0s1 262008 181248 80760 69% /boot
fdescfs 1 1 0 100% /dev/fd
tmpfs 2062880 4 2062876 0% /tmp
>From the perspective of the uboot system, this is correct, as my uboot
boot command is similar to the ones referenced at rtfm.net:
setenv boot_freebsd 'fatload usb 0 $loadaddr kernel/kernel ; bootoctlinux
$loadaddr coremask=0x3'
However, since the uboot boot partition is mounted as /boot, the sysctl answer
is wrong.
Why do I care?
Because the logic that backs up the old kernel to kernel.old when running
'make installkernel' doesn't work right - my existing kernel is always
destroyed and the new kernel installed as /boot/kernel.
e.g.:
thiskernel=`sysctl -n kern.bootfile` ; if [ ! "`dirname "$thiskernel"`" -ef
/boot/kernel ] ; then chflags -R noschg /boot/kernel ; rm -rf /boot/kernel ;
rm -rf /usr/lib/debug/boot/kernel ; else if [ -d /boot/kernel.old ] ; then
chflags -R noschg /boot/kernel.old ; rm -rf /boot/kernel.old ; fi ; mv
/boot/kernel /boot/kernel.old ; if [ -n "/usr/lib/debug" -a -d
/usr/lib/debug/boot/kernel ]; then rm -rf /usr/lib/debug/boot/kernel.old ; mv
/usr/lib/debug/boot/kernel /usr/lib/debug/boot/kernel.old ; fi ; sysctl
kern.bootfile=/boot/kernel.old/"`basename "$thiskernel"`" ; fi
mkdir -p /boot/kernel
install -p -m 555 -o root -g wheel kernel /boot/kernel/
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