#ifndef _LINUX_SECUREBITS_H
  #define _LINUX_SECUREBITS_H 1
  
  #define SECUREBITS_DEFAULT 0x00000000
  
  extern unsigned securebits;
  
  /* When set UID 0 has no special privileges. When unset, we support
     inheritance of root-permissions and suid-root executable under
     compatibility mode. We raise the effective and inheritable bitmasks
     *of the executable file* if the effective uid of the new process is
     0. If the real uid is 0, we raise the inheritable bitmask of the
     executable file. */
  #define SECURE_NOROOT            0
  
  /* When set, setuid to/from uid 0 does not trigger capability-"fixes"
     to be compatible with old programs relying on set*uid to loose
     privileges. When unset, setuid doesn't change privileges. */
  #define SECURE_NO_SETUID_FIXUP   2
  
  /* Each securesetting is implemented using two bits. One bit specify
     whether the setting is on or off. The other bit specify whether the
     setting is fixed or not. A setting which is fixed cannot be changed
     from user-level. */
  
  #define issecure(X) ( (1 << (X+1)) & SECUREBITS_DEFAULT ? 	\
  		      (1 << (X)) & SECUREBITS_DEFAULT :		\
  		      (1 << (X)) & securebits )
  
  #endif /* !_LINUX_SECUREBITS_H */