Create a real arc4linux function so we don't have to visible seed random in dhcpcd main.

1 files changed, 23 insertions, 0 deletions

diff --git a/common.c b/common.c
index e207258e..91fcd7a9 100644
--- a/common.c
+++ b/common.c
@@ -33,9 +33,11 @@
 #ifdef BSD
 #  include <paths.h>
 #endif
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 #include <unistd.h>
 
 #include "common.h"
@@ -74,6 +76,27 @@ get_line(char **line, size_t *len, FILE *fp)
 	return last;
 }
 
+/* Simple hack to return a random number without arc4random */
+#ifndef HAVE_ARC4RANDOM
+uint32_t arc4random(void)
+{
+	int fd;
+	static unsigned long seed = 0;
+
+	if (!seed) {
+		fd = open("/dev/urandom", 0);
+		if (fd == -1 || read(fd,  &seed, sizeof(seed)) == -1)
+			seed = time(0);
+		if (fd >= 0)
+			close(fd);
+
+		srandom(seed);
+	}
+
+	return (uint32_t)random();
+}
+#endif
+
 /* strlcpy is nice, shame glibc does not define it */
 #if HAVE_STRLCPY
 #else