libexec/rc/rc.d/dumpon

   1 #!/bin/sh
   2 #
   3 #
   4
   5 # PROVIDE: dumpon
   6 # BEFORE: disks
   7 # KEYWORD: nojail
   8
   9 . /etc/rc.subr
  10
  11 name="dumpon"
  12 desc="Dump kernel corefiles from swap to disk"
  13 start_cmd="dumpon_start"
  14 stop_cmd="dumpon_stop"
  15
  16 dumpon_try()
  17 {
  18         local flags
  19
  20         flags=${dumpon_flags}
  21         if [ -n "${dumppubkey}" ]; then
  22                 warn "The dumppubkey variable is deprecated.  Use dumpon_flags."
  23                 flags="${flags} -k ${dumppubkey}"
  24         fi
  25         /sbin/dumpon ${flags} "${1}"
  26         if [ $? -eq 0 ]; then
  27                 # Make a symlink in devfs for savecore
  28                 ln -fs "${1}" /dev/dumpdev
  29                 return 0
  30         fi
  31         warn "unable to specify $1 as a dump device"
  32         return 1
  33 }
  34
  35 dumpon_warn_unencrypted()
  36 {
  37         if [ -n "${dumppubkey}" ]; then
  38                 return
  39         fi
  40         for flag in ${dumpon_flags}; do
  41                 if [ $flag = -k ]; then
  42                         return
  43                 fi
  44         done
  45         warn "Kernel dumps will be written to the swap partition without encryption."
  46 }
  47
  48 dumpon_start()
  49 {
  50         # Enable dumpdev so that savecore can see it. Enable it
  51         # early so a crash early in the boot process can be caught.
  52         #
  53         case ${dumpdev} in
  54         [Nn][Oo])
  55                 ;;
  56         [Aa][Uu][Tt][Oo] | '')
  57                 root_hold_wait
  58                 dev=$(/bin/kenv -q dumpdev)
  59                 if [ -n "${dev}" ] ; then
  60                         dumpon_try "${dev}"
  61                         return $?
  62                 fi
  63                 if [ -z ${dumpdev} ] ; then
  64                         return
  65                 fi
  66                 while read dev mp type more ; do
  67                         [ "${type}" = "swap" ] || continue
  68                         case ${dev} in
  69                         *.bde|*.eli)
  70                                 dumpon_warn_unencrypted
  71                                 dev=${dev%.*}
  72                                 ;;
  73                         esac
  74                         [ -c "${dev}" ] || continue
  75                         dumpon_try "${dev}" 2>/dev/null && return 0
  76                 done </etc/fstab
  77                 echo "No suitable dump device was found." 1>&2
  78                 return 1
  79                 ;;
  80         *)
  81                 root_hold_wait
  82                 dumpon_try "${dumpdev}"
  83                 ;;
  84         esac
  85 }
  86
  87 dumpon_stop()
  88 {
  89         case ${dumpdev} in
  90         [Nn][Oo])
  91                 ;;
  92         *)
  93                 rm -f /dev/dumpdev
  94                 /sbin/dumpon -v off
  95                 ;;
  96         esac
  97 }
  98
  99 load_rc_config $name
 100 run_rc_command "$1"