use drand48 et al. instead of random

[ppp.git] / pppd / magic.c

diff --git a/pppd/magic.c b/pppd/magic.c
index 20dfd6fe3a4823ee285fce41f89705ac35f3bddb..7391b1405df8a52b7649bd3390f2f24bcd06afc1 100644 (file)
--- a/pppd/magic.c
+++ b/pppd/magic.c
@@ -18,53 +18,70 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: magic.c,v 1.1 1993/11/11 03:54:25 paulus Exp $";
+static char rcsid[] = "$Id: magic.c,v 1.4 1995/04/24 05:57:01 paulus Exp $";
 #endif
 
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/time.h>
 
+#include "pppd.h"
 #include "magic.h"
 
+static u_int32_t next;         /* Next value to return */
 
-static u_long next;            /* Next value to return */
-
-extern u_long gethostid __ARGS((void));
-extern long random __ARGS((void));
-extern void srandom __ARGS((int));
+extern int gethostid __P((void));
+extern long mrand48 __P((void));
+extern void srand48 __P((long));
 
 
 /*
  * magic_init - Initialize the magic number generator.
  *
- * Computes first magic number and seed for random number generator.
  * Attempts to compute a random number seed which will not repeat.
- * The current method uses the current hostid and current time.
+ * The current method uses the current hostid and current time, currently.
  */
-void magic_init()
+void
+magic_init()
 {
-    struct timeval tv;
-
-    next = gethostid();
-    if (gettimeofday(&tv, NULL)) {
-       perror("gettimeofday");
-       exit(1);
-    }
-    next ^= (u_long) tv.tv_sec ^ (u_long) tv.tv_usec;
+    long seed;
 
-    srandom((int) next);
+    seed = gethostid() ^ time(NULL);
+    srand48(seed);
 }
 
-
 /*
  * magic - Returns the next magic number.
  */
-u_long magic()
+u_int32_t
+magic()
+{
+    return (u_int32_t) mrand48();
+}
+
+#ifdef NO_DRAND48
+/*
+ * Substitute procedures for those systems which don't have
+ * drand48 et al.
+ */
+
+double
+drand48()
+{
+    return (double)random() / (double)0x7fffffffL; /* 2**31-1 */
+}
+
+long
+mrand48()
 {
-    u_long m;
+    return random();
+}
 
-    m = next;
-    next = (u_long) random();
-    return (m);
+void
+srand48(seedval)
+long seedval;
+{
+    srandom((int)seedval);
 }
+
+#endif