etc/autofs/special_media

   1 #!/bin/sh
   2 #
   3 # $FreeBSD$
   4 #
   5
   6 # Print newline-separated list of devices available for mounting.
   7 # If there is a filesystem label - use it, otherwise use device name.
   8 print_available() {
   9         local _fstype _fstype_and_label _label _p
  10
  11         for _p in ${providers}; do
  12                 _fstype_and_label="$(fstyp -l "/dev/${_p}" 2> /dev/null)"
  13                 if [ $? -ne 0 ]; then
  14                         # Ignore devices for which we were unable
  15                         # to determine filesystem type.
  16                         continue
  17                 fi
  18
  19                 _fstype="${_fstype_and_label%% *}"
  20                 if [ "${_fstype}" != "${_fstype_and_label}" ]; then
  21                         _label="${_fstype_and_label#* }"
  22                         echo "${_label}"
  23                         continue
  24                 fi
  25
  26                 echo "${_p}"
  27         done
  28 }
  29
  30 # Print a single map entry.
  31 print_one() {
  32         local _fstype _fstype_and_label _label _key _p
  33
  34         _key="$1"
  35
  36         _fstype="$(fstyp "/dev/${_key}" 2> /dev/null)"
  37         if [ $? -eq 0 ]; then
  38                 echo "-fstype=${_fstype},nosuid :/dev/${_key}"
  39                 return
  40         fi
  41
  42         for _p in ${providers}; do
  43                 _fstype_and_label="$(fstyp -l "/dev/${_p}" 2> /dev/null)"
  44                 if [ $? -ne 0 ]; then
  45                         # Ignore devices for which we were unable
  46                         # to determine filesystem type.
  47                         continue
  48                 fi
  49
  50                 _fstype="${_fstype_and_label%% *}"
  51                 if [ "${_fstype}" = "${_fstype_and_label}" ]; then
  52                         # No label, try another device.
  53                         continue
  54                 fi
  55
  56                 _label="${_fstype_and_label#* }"
  57                 if [ "${_label}" != "${_key}" ]; then
  58                         # Labels don't match, try another device.
  59                         continue
  60                 fi
  61
  62                 echo "-fstype=${_fstype},nosuid :/dev/${_p}"
  63         done
  64
  65         # No matching device - don't print anything, autofs will handle it.
  66 }
  67
  68 # Obtain a list of (geom-provider-name, access-count) pairs, turning this:
  69 #
  70 # z0xfffff80005085d00 [shape=hexagon,label="ada0\nr2w2e3\nerr#0\nsector=512\nstripe=0"];
  71 #
  72 # Into this:
  73 #
  74 # ada0 r2w2e3
  75 #
  76 # XXX: It would be easier to use kern.geom.conftxt instead, but it lacks
  77 #      access counts.
  78 pairs=$(sysctl kern.geom.confdot | sed -n 's/^.*hexagon,label="\([^\]*\)\\n\([^\]*\).*/\1 \2/p')
  79
  80 # Obtain a list of GEOM providers that are not already open - not mounted,
  81 # and without other GEOM class, such as gpart, attached.  In other words,
  82 # grep for "r0w0e0".  Skip providers with names containing slashes; we're
  83 # not interested in geom_label(4) creations.
  84 providers=$(echo "$pairs" | awk '$2 == "r0w0e0" && $1 !~ /\// { print $1 }')
  85
  86 if [ $# -eq 0 ]; then
  87         print_available
  88         exit 0
  89 fi
  90
  91 print_one "$1"
  92 exit 0
  93