src/tests/lxc-test-symlink

   1 #!/bin/bash
   2
   3 set -ex
   4
   5 # lxc: linux Container library
   6
   7 # Authors:
   8 # Serge Hallyn <serge.hallyn@ubuntu.com>
   9 #
  10 # This is a regression test for symbolic links
  11
  12 dirname=$(mktemp -d)
  13 fname=$(mktemp)
  14 fname2=$(mktemp)
  15
  16 lxcpath=/var/lib/lxcsym1
  17
  18 cleanup() {
  19         lxc-destroy -P $lxcpath -f -n symtest1 || true
  20         rm -f $lxcpath
  21         rmdir $dirname || true
  22         rm -f $fname || true
  23         rm -f $fname2 || true
  24 }
  25
  26 trap cleanup EXIT SIGHUP SIGINT SIGTERM
  27
  28 testrun() {
  29         expected=$1
  30         run=$2
  31         pass="pass"
  32         lxc-start -P $lxcpath -n symtest1 -l trace -o $lxcpath/log || pass="fail"
  33         [ $pass = "pass" ] && lxc-wait -P $lxcpath -n symtest1 -t 10 -s RUNNING || pass="fail"
  34         if [ "$pass" != "$expected" ]; then
  35                 echo "Test $run: expected $expected but container did not.  Start log:"
  36                 cat $lxcpath/log
  37                 echo "FAIL: Test $run: expected $expected but container did not."
  38                 false
  39         fi
  40         lxc-stop -P $lxcpath -n symtest1 -k || true
  41 }
  42
  43 # make lxcpath a symlink - this should NOT cause failure
  44 ln -s /var/lib/lxc $lxcpath
  45
  46 lxc-destroy -P $lxcpath -f -n symtest1 || true
  47 lxc-create -P $lxcpath -t busybox -n symtest1
  48
  49 cat >> /var/lib/lxc/symtest1/config << EOF
  50 lxc.mount.entry = $dirname opt/xxx/dir none bind,create=dir
  51 lxc.mount.entry = $fname opt/xxx/file none bind,create=file
  52 lxc.mount.entry = $fname2 opt/xxx/file2 none bind
  53 lxc.mount.entry = $dirname /var/lib/lxc/symtest1/rootfs/opt/xxx/dir2 none bind,create=dir
  54 EOF
  55
  56 # Regular - should succeed
  57 mkdir -p /var/lib/lxc/symtest1/rootfs/opt/xxx
  58 touch /var/lib/lxc/symtest1/rootfs/opt/xxx/file2
  59 testrun pass 1
  60
  61 # symlink - should fail
  62 rm -rf /var/lib/lxc/symtest1/rootfs/opt/xxx
  63 mkdir -p /var/lib/lxc/symtest1/rootfs/opt/xxx2
  64 ln -s /var/lib/lxc/symtest1/rootfs/opt/xxx2 /var/lib/lxc/symtest1/rootfs/opt/xxx
  65 touch /var/lib/lxc/symtest1/rootfs/opt/xxx/file2
  66 testrun fail 2
  67
  68 # final final symlink - should fail
  69 rm -rf $lxcpath/symtest1/rootfs/opt/xxx
  70 mkdir -p $lxcpath/symtest1/rootfs/opt/xxx
  71 mkdir -p $lxcpath/symtest1/rootfs/opt/xxx/dir
  72 touch $lxcpath/symtest1/rootfs/opt/xxx/file
  73 touch $lxcpath/symtest1/rootfs/opt/xxx/file2src
  74 ln -s $lxcpath/symtest1/rootfs/opt/xxx/file2src $lxcpath/symtest1/rootfs/opt/xxx/file2
  75 testrun fail 3
  76
  77 # Ideally we'd also try a loop device, but that won't work in nested containers
  78 # anyway - TODO
  79
  80 # what about /proc itself
  81
  82 rm -rf $lxcpath/symtest1/rootfs/opt/xxx
  83 mkdir -p $lxcpath/symtest1/rootfs/opt/xxx
  84 touch $lxcpath/symtest1/rootfs/opt/xxx/file2
  85 mv $lxcpath/symtest1/rootfs/proc $lxcpath/symtest1/rootfs/proc1
  86 ln -s $lxcpath/symtest1/rootfs/proc1 $lxcpath/symtest1/rootfs/proc
  87 testrun fail 4
  88
  89 echo "all tests passed"