sbin/reboot/nextboot.sh

   1 #! /bin/sh
   2 #
   3 # Copyright 2002. Gordon Tetlow.
   4 # gordon@FreeBSD.org
   5 # Copyright (c) 2012 Sandvine Incorporated. All rights reserved.
   6 #
   7 # $FreeBSD$
   8
   9 delete="NO"
  10 kenv=
  11 force="NO"
  12 nextboot_file="/boot/nextboot.conf"
  13
  14 add_kenv()
  15 {
  16         local var value
  17
  18         var=$1
  19         # strip literal quotes if passed in
  20         value=${2%\"*}
  21         value=${value#*\"}
  22
  23         if [ -n "${kenv}" ]; then
  24                 kenv="${kenv}
  25 "
  26         fi
  27         kenv="${kenv}${var}=\"${value}\""
  28 }
  29
  30 display_usage() {
  31         echo "Usage: nextboot [-e variable=value] [-f] [-k kernel] [-o options]"
  32         echo "       nextboot -D"
  33 }
  34
  35 while getopts "De:fk:o:" argument ; do
  36         case "${argument}" in
  37         D)
  38                 delete="YES"
  39                 ;;
  40         e)
  41                 var=${OPTARG%%=*}
  42                 value=${OPTARG#*=}
  43                 if [ -z "$var" -o -z "$value" ]; then
  44                         display_usage
  45                         exit 1
  46                 fi
  47                 add_kenv "$var" "$value"
  48                 ;;
  49         f)
  50                 force="YES"
  51                 ;;
  52         k)
  53                 kernel="${OPTARG}"
  54                 add_kenv kernel "$kernel"
  55                 ;;
  56         o)
  57                 add_kenv kernel_options "${OPTARG}"
  58                 ;;
  59         *)
  60                 display_usage
  61                 exit 1
  62                 ;;
  63         esac
  64 done
  65
  66 if [ ${delete} = "YES" ]; then
  67         rm -f ${nextboot_file}
  68         exit 0
  69 fi
  70
  71 if [ -z "${kenv}" ]; then
  72         display_usage
  73         exit 1
  74 fi
  75
  76 if [ -n "${kernel}" -a ${force} = "NO" -a ! -d /boot/${kernel} ]; then
  77         echo "Error: /boot/${kernel} doesn't exist. Use -f to override."
  78         exit 1
  79 fi
  80
  81 df -Tn "/boot/" 2>/dev/null | while read _fs _type _other ; do
  82         [ "zfs" = "${_type}" ] || continue
  83         cat 1>&2 <<-EOF
  84                 WARNING: loader(8) has only R/O support for ZFS
  85                 nextboot.conf will NOT be reset in case of kernel boot failure
  86         EOF
  87 done
  88
  89 cat > ${nextboot_file} << EOF
  90 nextboot_enable="YES"
  91 $kenv
  92 EOF