Viewing file:  securebits.h (1.15 KB) -rw-r--r--
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#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 executablew 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 */
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