When /dev/urandom is not available, we have to use some kind of a hack
to generate a random MBR identifier. Use a better fallback that
incorporates the clock down to microsecond granularity.
---
fdisk/fdisk.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/fdisk/fdisk.c b/fdisk/fdisk.c
index cc71c5c..ede41b3 100644
--- a/fdisk/fdisk.c
+++ b/fdisk/fdisk.c
@@ -18,6 +18,7 @@
#include <errno.h>
#include <getopt.h>
#include <sys/stat.h>
+#include <sys/time.h>
#include <time.h>
#include "nls.h"
@@ -148,6 +149,7 @@ get_random_id(void) {
int fd;
unsigned int v;
ssize_t rv = -1;
+ struct timeval tv;
fd = open("/dev/urandom", O_RDONLY);
if (fd >= 0) {
@@ -159,7 +161,8 @@ get_random_id(void) {
return v;
/* Fallback: sucks, but better than nothing */
- return (unsigned int)(getpid() + time(NULL));
+ gettimeofday(&tv, NULL);
+ return (unsigned int)(tv.tv_sec + (tv.tv_usec << 12) + getpid());
}
/* normally O_RDWR, -l option gives O_RDONLY */
--
1.5.3.7
-
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