Fixed /proc/self/exe (and /proc/<MY_PID>/exe)

- Implemented a special mapping function for /proc, to be
  able to map the symlink at /proc/self/exe.
- This can be described as a countermeasure to side-effects of
  mapping exec parameters: /proc/self/exe (as well as
  /proc/<MY_PID>/exe, which is the same thing) need special care
  if the binary was started by anything else than direct exec.

Examples:
a) if CPU transparency is used, the real /proc/self/exe points
   to e.g. Qemu. Now SB2 can make it look like the link points
   to the binary which is running under qemu.
b) if "ld.so-start" was used, the real /proc/self/exe points to
   ld.so and not to the binary itself. Again, SB2 maps that
   to a symlink which points to the correct binary.

Other related things:
- all mapping modes use this feature now
- Lua <=> C interface version had to be incremented
- Lua mapping code <=> mapping rules version had to be incremented

1 files changed, 1 insertions, 0 deletions

diff --git a/utils/sb2 b/utils/sb2
index a97868f..7d9c667 100755
--- a/utils/sb2
+++ b/utils/sb2
@@ -721,6 +721,7 @@ function initialize_new_sb2_session()
 
 	mkdir -p $SBOX_SESSION_DIR
 	mkdir $SBOX_SESSION_DIR/tmp
+	mkdir $SBOX_SESSION_DIR/proc
 	mkdir $SBOX_SESSION_DIR/rules
 	mkdir $SBOX_SESSION_DIR/rev_rules