blob: 6548b654aa1f495c6308f167280c6fcc0e7789ec (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
use crate::Result;
use crate::errno::Errno;
use libc::{self, c_int, c_ulong};
libc_bitflags! {
/// Flags used and returned by [`get()`](fn.get.html) and
/// [`set()`](fn.set.html).
pub struct Persona: c_int {
ADDR_COMPAT_LAYOUT;
ADDR_NO_RANDOMIZE;
ADDR_LIMIT_32BIT;
ADDR_LIMIT_3GB;
#[cfg(not(target_env = "musl"))]
FDPIC_FUNCPTRS;
MMAP_PAGE_ZERO;
READ_IMPLIES_EXEC;
SHORT_INODE;
STICKY_TIMEOUTS;
#[cfg(not(target_env = "musl"))]
UNAME26;
WHOLE_SECONDS;
}
}
/// Retrieve the current process personality.
///
/// Returns a Result containing a Persona instance.
///
/// Example:
///
/// ```
/// # use nix::sys::personality::{self, Persona};
/// let pers = personality::get().unwrap();
/// assert!(!pers.contains(Persona::WHOLE_SECONDS));
/// ```
pub fn get() -> Result<Persona> {
let res = unsafe {
libc::personality(0xFFFFFFFF)
};
Errno::result(res).map(|r| Persona::from_bits_truncate(r))
}
/// Set the current process personality.
///
/// Returns a Result containing the *previous* personality for the
/// process, as a Persona.
///
/// For more information, see [personality(2)](https://man7.org/linux/man-pages/man2/personality.2.html)
///
/// **NOTE**: This call **replaces** the current personality entirely.
/// To **update** the personality, first call `get()` and then `set()`
/// with the modified persona.
///
/// Example:
///
/// ```
/// # use nix::sys::personality::{self, Persona};
/// let mut pers = personality::get().unwrap();
/// assert!(!pers.contains(Persona::ADDR_NO_RANDOMIZE));
/// personality::set(pers | Persona::ADDR_NO_RANDOMIZE);
/// ```
pub fn set(persona: Persona) -> Result<Persona> {
let res = unsafe {
libc::personality(persona.bits() as c_ulong)
};
Errno::result(res).map(|r| Persona::from_bits_truncate(r))
}
|
