mod-suspend.sh

   1 #!/bin/sh
   2 # geninitrd mod: suspend
   3 USE_SUSPEND=${USE_SUSPEND:-yes}
   4
   5 # resume device
   6 resume_dev=""
   7
   8 # setup geninitrd module
   9 # @access       public
  10 setup_mod_suspend() {
  11         # XXX this needs tuxonice loaded first
  12         if is_yes "$USE_SUSPEND" && is_yes "$USE_TUXONICE"; then
  13                 warn "Tuxonice and mainline suspend are exclusive!"
  14         fi
  15
  16         resume=$(find_tool $(get_libdir /usr/LIBDIR/suspend/resume) $initrd_dir/resume /usr/sbin/resume)
  17
  18         if [ ! -x "$resume" ] || [ ! -f /etc/suspend.conf ]; then
  19                 USE_SUSPEND=no
  20         else
  21                 resume_dev="$(awk '/^resume device =/ { print $4 } ' /etc/suspend.conf)"
  22                 if [ -z "$resume_dev" ]; then
  23                         warn "Option 'resume device' not found in /etc/suspend.conf. Disabling suspend support."
  24                         USE_SUSPEND=no
  25                 fi
  26         fi
  27 }
  28
  29 # find modules for for suspend
  30 # @access       public
  31 find_modules_suspend() {
  32         resume_dev="$(awk '/^resume device =/ { print $4 } ' /etc/suspend.conf)"
  33
  34         # save state
  35         local vgvolumes=$LVM_VGVOLUMES
  36         find_modules_for_devpath $resume_dev
  37
  38         # check for saved state, differenciate between rootfs VG
  39         if [ "$LVM_VGVOLUMES" != "$vgvolumes" ]; then
  40                 # save suspend VG int oseparate var
  41                 LVM_SUSPENDVG=$LVM_VGVOLUMES
  42                 LVM_VGVOLUMES=$vgvolumes
  43                 verbose "suspend device is on LVM"
  44         fi
  45 }
  46
  47 # generate initrd fragment
  48 # @access       public
  49 initrd_gen_suspend() {
  50         if ! is_yes "$USE_SUSPEND"; then
  51                 return
  52         fi
  53
  54         verbose "Setting up suspend..."
  55
  56         mknod -m 640 $DESTDIR/dev/snapshot c 10 231
  57         mkdir -p $DESTDIR${resume_dev%/*}
  58         inst $resume_dev $resume_dev
  59
  60         inst /etc/suspend.conf /etc/suspend.conf
  61         inst_exec $resume /bin/resume
  62
  63         add_linuxrc <<-'EOF'
  64         resume=no
  65         for arg in $CMDLINE; do
  66                 if [ "${arg##resume=}" != "${arg}" ]; then
  67                         resume=${arg##resume=}
  68                 fi
  69         done
  70         if [ "$resume" = "yes" ]; then
  71                 resume
  72         fi
  73         EOF
  74 }