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Commit a454bb36 authored by Rusty Russell's avatar Rusty Russell
Browse files

lguest: have --rng read from /dev/urandom not /dev/random. 



Theoretical debates aside, now it boots.

Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent be8ff595

tools/lguest/lguest.c

+5 −5
Original line number Diff line number Diff line
@@ -1733,9 +1733,9 @@ static void setup_block_file(const char *filename) 
}



/*L:211

 * Our random number generator device reads from /dev/random into the Guest's

 * Our random number generator device reads from /dev/urandom into the Guest's

 * input buffers.  The usual case is that the Guest doesn't want random numbers

 * and so has no buffers although /dev/random is still readable, whereas

 * and so has no buffers although /dev/urandom is still readable, whereas

 * console is the reverse.

 *

 * The same logic applies, however.
@@ -1763,7 +1763,7 @@ static void rng_input(struct virtqueue *vq) 
	while (!iov_empty(iov, in_num)) {

		len = readv(rng_info->rfd, iov, in_num);

		if (len <= 0)

			err(1, "Read from /dev/random gave %i", len);

			err(1, "Read from /dev/urandom gave %i", len);

		iov_consume(iov, in_num, NULL, len);

		totlen += len;

	}
@@ -1780,8 +1780,8 @@ static void setup_rng(void) 
	struct device *dev;

	struct rng_info *rng_info = malloc(sizeof(*rng_info));



	/* Our device's privat info simply contains the /dev/random fd. */

	rng_info->rfd = open_or_die("/dev/random", O_RDONLY);

	/* Our device's private info simply contains the /dev/urandom fd. */

	rng_info->rfd = open_or_die("/dev/urandom", O_RDONLY);



	/* Create the new device. */

	dev = new_device("rng", VIRTIO_ID_RNG);