On Tue, Nov 08, 2022 at 11:10:19AM +0000, Klemens Nanni wrote: > More read-only filesystems mean less fsck during boot after crashes. > Especially on crappy machines like the Pinebook Poop, I keep /usr > read-only and run with this diff so I still get a relinked kernel. > > rc's reorder_libs() already does the same remount dance, but for > multiple directories/filesystems. > > My diff works as expected with read-write and read-only /usr as well as > interrupting /usr/libexec/reorder_kernel runs with ^C, i.e. a failed run > will correctly mount /usr ro again if it was ro before the run. > > Feedback? OK?
Ping. Index: libexec/reorder_kernel/reorder_kernel.sh =================================================================== RCS file: /cvs/src/libexec/reorder_kernel/reorder_kernel.sh,v retrieving revision 1.13 diff -u -p -r1.13 reorder_kernel.sh --- libexec/reorder_kernel/reorder_kernel.sh 7 Nov 2022 15:55:56 -0000 1.13 +++ libexec/reorder_kernel/reorder_kernel.sh 14 Nov 2022 19:33:25 -0000 @@ -27,13 +27,32 @@ LOGFILE=$KERNEL_DIR/$KERNEL/relink.log PROGNAME=${0##*/} SHA256=/var/db/kernel.SHA256 -# Silently skip if on a NFS mounted filesystem. -df -t nonfs $KERNEL_DIR >/dev/null 2>&1 +# Silently skip if on NFS, otherwise remount the filesystem read-write. +DEV=$(df -t ffs $KERNEL_DIR 2>/dev/null | awk 'NR == 2 { print $1 }') +MP=$(mount | grep ^$DEV) +RO=false +if [[ $MP == *read-only* ]]; then + MP=${MP%% *} + mount -u -w $MP + RO=true +fi + +restore_mount() { + if $RO; then + # Close the logfile to unbusy $MP by switching back to console. + exec 1>/dev/console + exec 2>&1 + mount -u -r $MP + fi +} # Install trap handlers to inform about success or failure via syslog. ERRMSG='failed' -trap 'trap - EXIT; logger -st $PROGNAME "$ERRMSG" >/dev/console 2>&1' ERR -trap 'logger -t $PROGNAME "kernel relinking done"' EXIT +trap 'trap - EXIT + logger -st $PROGNAME "$ERRMSG" 2>/dev/console + restore_mount' ERR +trap 'logger -t $PROGNAME "kernel relinking done" + restore_mount' EXIT # Create kernel compile dir and redirect stdout/stderr to a logfile. mkdir -m 700 -p $KERNEL_DIR/$KERNEL