Linux kernel mirror (for testing)
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linux
1#ifndef _LINUX_SECUREBITS_H
2#define _LINUX_SECUREBITS_H 1
3
4#define SECUREBITS_DEFAULT 0x00000000
5
6extern unsigned securebits;
7
8/* When set UID 0 has no special privileges. When unset, we support
9 inheritance of root-permissions and suid-root executable 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 */