1 #ifndef _LINUX_SECUREBITS_H
2 #define _LINUX_SECUREBITS_H 1
3
4 #define SECUREBITS_DEFAULT 0x00000000
5
6 extern unsigned securebits;
7
8 /* When set UID 0 has no special privileges. When unset, we support
9 inheritance of root-permissions and suid-root executablew under
10 compatibility mode. We raise the effective and inheritable bitmasks
11 *of the executable file* if the effective uid of the new process is
12 0. If the real uid is 0, we raise the inheritable bitmask of the
13 executable file. */
14 #define SECURE_NOROOT 0
15
16 /* When set, setuid to/from uid 0 does not trigger capability-"fixes"
17 to be compatible with old programs relying on set*uid to loose
18 privileges. When unset, setuid doesn't change privileges. */
19 #define SECURE_NO_SETUID_FIXUP 2
20
21 /* Each securesetting is implemented using two bits. One bit specify
22 whether the setting is on or off. The other bit specify whether the
23 setting is fixed or not. A setting which is fixed cannot be changed
24 from user-level. */
25
26 #define issecure(X) ( (1 << (X+1)) & SECUREBITS_DEFAULT ? \
27 (1 << (X)) & SECUREBITS_DEFAULT : \
28 (1 << (X)) & securebits )
29
30 #endif /* !_LINUX_SECUREBITS_H */
31
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