libexec/rc/rc.d/dumpon

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