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provide getrandom wrapper to support glibc < 2.25

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Debian stretch (currently stable) only has glibc 2.24...
This commit is contained in:
Daniel Micay 2018-08-24 18:44:49 -04:00
parent 35c9e6f16d
commit 71dde7c4f8
1 changed files with 12 additions and 2 deletions
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14
random.c
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@ -1,11 +1,21 @@
#include <errno.h>
#include <string.h>
#include <sys/random.h>
#include "random.h"
#include "util.h"
#if __has_include(<sys/random.h>)
// glibc 2.25 and later
#include <sys/random.h>
#else
#include <unistd.h>
#include <sys/syscall.h>
static ssize_t getrandom(void *buf, size_t buflen, unsigned int flags) {
return syscall(SYS_getrandom, buf, buflen, flags);
}
#endif
void get_random_seed(void *buf, size_t size) {
while (size > 0) {
ssize_t r;