package/block-mount/files/10-swap

   1 #!/bin/sh
   2 # Copyright (C) 2009-2010 OpenWrt.org
   3 # Copyright (C) 2010 Vertical Communications
   4 # This is free software, licensed under the GNU General Public License v2.
   5 # See /LICENSE for more information.
   6 #
   7
   8 . /lib/functions/block.sh
   9
  10 blkdev=`dirname $DEVPATH`
  11
  12 if [ `basename $blkdev` != "block" ]; then
  13
  14     device=`basename $DEVPATH`
  15
  16
  17     case "$ACTION" in
  18         add)
  19                 local autoswap_from_fstab
  20                 local automount_from_fstab
  21                 local from_fstab
  22                 local anon_mount
  23                 local anon_swap
  24                 local anon_fsck
  25                 local mds_mount_device
  26                 local sds_swap_device
  27                 local sds_swap_enabled
  28                 local use_device
  29                 local do_swap=0
  30
  31             mount_dev_section_cb() {
  32                         mds_mount_device="$3"
  33             }
  34
  35             swap_dev_section_cb() {
  36                         sds_swap_device="$2"
  37                         sds_swap_enabled="$3"
  38                         return 0
  39             }
  40
  41                 config_get_automount
  42                 automount_from_fstab="$from_fstab"
  43
  44                 [ "$automount_from_fstab" -eq 1 ] && {
  45                         config_get_mount_section_by_device "/dev/$device"
  46                 }
  47
  48                 # skip trying swap if this device is defined as a mount point
  49                 [ -z "$mds_mount_device" ] && {
  50                         config_get_autoswap
  51                         autoswap_from_fstab="$from_fstab"
  52
  53                         [ "$autoswap_from_fstab" -eq 1 ] && {
  54                                 config_get_swap_section_by_device "/dev/$device"
  55                                 use_device="$sds_swap_device"
  56                                 do_swap="$sds_swap_enabled"
  57                         }
  58
  59                         [ -z "$use_device" ] && [ "$anon_swap" -eq 1 ] && {
  60                                 use_device="/dev/$device" && do_swap=1
  61                         }
  62                 }
  63
  64                 [ -n "$use_device" ] && [ "$do_swap" -eq 1 ] && {
  65                         grep -q "$use_device" /proc/swaps || grep -q "$use_device" /proc/mounts || {
  66                                 swapon "$use_device"
  67                         }
  68                 }
  69                 reset_dev_section_cb
  70                 ;;
  71         remove)
  72                 grep -q "/dev/$device" /proc/swaps && {
  73                         swapoff "/dev/$device"
  74                 }
  75                 ;;
  76     esac
  77 fi
  78