IABSD.fr/src/libexec/reorder_kernel/reorder_kernel.sh

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• Author : kn
  Date : 2022-11-07 15:55:56
  Hash : f29e23ab
  Message : Use variable and shorter logic for NFS check No need to hardcode a parent path if we can reuse an existing variable for the specific path that is in being used. Negate the file system type in df(1) so the `|| exit 1' can be dropped in favour of the errexit option, as is done for everything else in there. Clarify the comment how this is intentionally NOT logged, i.e. the test happens before the error trap/syslog/logfile handling. OK millert

• libexec/reorder_kernel/reorder_kernel.sh

• #!/bin/ksh
  #
  # $OpenBSD: reorder_kernel.sh,v 1.13 2022/11/07 15:55:56 kn Exp $
  #
  # Copyright (c) 2017 Robert Peichaer <rpe@openbsd.org>
  #
  # Permission to use, copy, modify, and distribute this software for any
  # purpose with or without fee is hereby granted, provided that the above
  # copyright notice and this permission notice appear in all copies.
  #
  # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  
  set -o errexit
  
  export PATH=/usr/bin:/bin:/usr/sbin:/sbin
  
  KERNEL=$(sysctl -n kern.osversion)
  KERNEL=${KERNEL%#*}
  KERNEL_DIR=/usr/share/relink/kernel
  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
  
  # 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
  
  # Create kernel compile dir and redirect stdout/stderr to a logfile.
  mkdir -m 700 -p $KERNEL_DIR/$KERNEL
  exec 1>$LOGFILE
  exec 2>&1
  
  ERRMSG="failed -- see $LOGFILE"
  
  if [[ -f $KERNEL_DIR.tgz ]]; then
  	rm -rf $KERNEL_DIR/$KERNEL/*
  	# The directory containing the logfile was just deleted, redirect
  	# stdout/stderr again to a new logfile.
  	exec 1>$LOGFILE
  	exec 2>&1
  	tar -C $KERNEL_DIR -xzf $KERNEL_DIR.tgz $KERNEL
  	rm -f $KERNEL_DIR.tgz
  fi
  
  if ! sha256 -C $SHA256 /bsd; then
  	cat <<__EOF
  
  Failed to verify /bsd's checksum, therefore a randomly linked kernel (KARL)
  is not being built. KARL can be re-enabled for next boot by issuing as root:
  
  sha256 -h $SHA256 /bsd
  __EOF
  	# Trigger ERR trap
  	false
  fi
  
  cd $KERNEL_DIR/$KERNEL
  make newbsd
  [ -f /etc/bsd.re-config ] && config -e -c /etc/bsd.re-config -f bsd
  make newinstall
  sync
  
  echo "\nKernel has been relinked and is active on next reboot.\n"
  cat $SHA256