user-tools/autosshfs-mount

   1 #!/bin/bash
   2
   3 set -e
   4 set -o pipefail
   5
   6 mountpoint_basedir=$1
   7
   8 if [ ! -d "$mountpoint_basedir" ]
   9 then
  10         echo "$0: supposed basedir is not a directory: $mountpoint_basedir" >&2
  11         exit 1
  12 fi
  13
  14 connection_params=$2
  15 connection_params=${connection_params##*/}
  16
  17 # connection_params is in form of:
  18 # %r@%n(%h):%p
  19 # relevant ssh config option: ControlPath /home/.../somewhere/%r@%n(%h):%p
  20 # see man ssh_config(5) for details.
  21 #
  22 # example incrontab:
  23 # /home/.../somewhere IN_CREATE autosshfs-mount mnt/ssh $#
  24
  25 if [[ $connection_params =~ ^([^@]+)@([^\(]+)\(([^\)]+)\):([0-9]+) ]]
  26 then
  27         user=${BASH_REMATCH[1]}
  28         host=${BASH_REMATCH[2]}
  29         hostname=${BASH_REMATCH[3]}
  30         port=${BASH_REMATCH[4]}
  31
  32         hash=`echo -n "$user$host$hostname$port" | md5sum | cut -c 1-32`
  33         exec {lockfd}>> /tmp/autosshfs-mount-$hash.lock
  34
  35         if flock --no-fork --exclusive --timeout 10 $lockfd
  36         then
  37                 mountname="$user@$host($hostname,$port)"
  38                 mountpoint="$mountpoint_basedir/$mountname"
  39                 mkdir -p "$mountpoint"
  40                 ln -snfT "$mountname" "$mountpoint_basedir/$host"
  41                 if ! mountpoint "$mountpoint"
  42                 then
  43                         sshfs -o allow_root,auto_unmount,Port=$port,ControlMaster=no,transform_symlinks,reconnect,Hostname="$hostname" "$user@$host:/" "$mountpoint" {lockfd}>&-
  44                         err=$?
  45                         if [ $err != 0 ]
  46                         then
  47                                 echo "$0: sshfs error $err" >&2
  48                         fi
  49                 fi
  50         else
  51                 echo "$0: can not acquire lock" >&2
  52                 exit 3
  53         fi
  54 else
  55         echo "$0: can not parse connection params: $connection_params" >&2
  56         exit 2
  57 fi