File: linux-rng-support.c

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (26 lines) | stat: -rw-r--r-- 518 bytes parent folder | download 
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
 
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <stdint.h>

#ifdef __linux__ 

ssize_t getrandom(void *buf, size_t len, unsigned int flags);

void arc4random_buf(void *buf, size_t nbytes) {
  while (nbytes > 0) {
    ssize_t actual_nbytes = 0;
    do {
    	actual_nbytes = getrandom(buf, nbytes, 0);
    } while (actual_nbytes == -1 && errno == EINTR);

    if (actual_nbytes == -1) {
      abort();
    }
    
    buf = (uint8_t *)(buf) + actual_nbytes;
    nbytes -= actual_nbytes;
  }
}

#endif