[wasi-libc.git] / libc-top-half / musl / src / misc / getentropy.c

#define _BSD_SOURCE
#include <unistd.h>
#include <sys/random.h>
#include <pthread.h>
#include <errno.h>

int getentropy(void *buffer, size_t len)
{
	int cs, ret = 0;
	char *pos = buffer;

	if (len > 256) {
		errno = EIO;
		return -1;
	}

	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);

	while (len) {
		ret = getrandom(pos, len, 0);
		if (ret < 0) {
			if (errno == EINTR) continue;
			else break;
		}
		pos += ret;
		len -= ret;
		ret = 0;
	}

	pthread_setcancelstate(cs, 0);

	return ret;
}
Commit	Line	Data
320054e8 DG	1	#define _BSD_SOURCE
	2	#include <unistd.h>
	3	#include <sys/random.h>
	4	#include <pthread.h>
	5	#include <errno.h>
	6
	7	int getentropy(void *buffer, size_t len)
	8	{
58795582	9	int cs, ret = 0;
320054e8 DG	10	char *pos = buffer;
	11
	12	if (len > 256) {
	13	errno = EIO;
	14	return -1;
	15	}
	16
	17	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
	18
	19	while (len) {
	20	ret = getrandom(pos, len, 0);
	21	if (ret < 0) {
	22	if (errno == EINTR) continue;
	23	else break;
	24	}
	25	pos += ret;
	26	len -= ret;
	27	ret = 0;
	28	}
	29
	30	pthread_setcancelstate(cs, 0);
	31
	32	return ret;
	33	}