[src/trunk]: src/sys provide KERN_URND, which extracts sizeof(int) random num...

[itojun <itojun%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/53d3137ba94b
branches:  trunk
changeset: 533506:53d3137ba94b
user:      itojun <itojun%NetBSD.org@localhost>
date:      Tue Jul 02 17:06:17 2002 +0000

description:
provide KERN_URND, which extracts sizeof(int) random number from the kernel
(similar to /dev/urandom, for use within chroot jail).

diffstat:

 sys/kern/kern_sysctl.c |  22 ++++++++++++++++++++--
 sys/sys/sysctl.h       |   9 +++++++--
 2 files changed, 27 insertions(+), 4 deletions(-)

diffs (94 lines):

diff -r 53bf2ed335b6 -r 53d3137ba94b sys/kern/kern_sysctl.c
--- a/sys/kern/kern_sysctl.c    Tue Jul 02 16:22:28 2002 +0000
+++ b/sys/kern/kern_sysctl.c    Tue Jul 02 17:06:17 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_sysctl.c,v 1.108 2002/05/14 02:58:32 matt Exp $   */
+/*     $NetBSD: kern_sysctl.c,v 1.109 2002/07/02 17:06:17 itojun Exp $ */
 
 /*-
  * Copyright (c) 1982, 1986, 1989, 1993
@@ -43,7 +43,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.108 2002/05/14 02:58:32 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.109 2002/07/02 17:06:17 itojun Exp $");
 
 #include "opt_ddb.h"
 #include "opt_insecure.h"
@@ -51,6 +51,7 @@
 #include "opt_pipe.h"
 #include "opt_sysv.h"
 #include "pty.h"
+#include "rnd.h"
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -102,6 +103,10 @@
 #include <sys/pipe.h>
 #endif
 
+#if NRND > 0
+#include <sys/rnd.h>
+#endif
+
 #define PTRTOINT64(foo)        ((u_int64_t)(uintptr_t)(foo))
 
 static int sysctl_file(void *, size_t *);
@@ -327,6 +332,9 @@
        int old_autonicetime;
        int old_vnodes;
        dev_t consdev;
+#if NRND > 0
+       int v;
+#endif
 
        /* All sysctl names at this level, except for a few, are terminal. */
        switch (name[0]) {
@@ -568,6 +576,16 @@
                    newp));
        case KERN_MONOTONIC_CLOCK:      /* XXX _POSIX_VERSION */
                return (sysctl_rdint(oldp, oldlenp, newp, 200112));
+       case KERN_URND:
+#if NRND > 0
+               if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) ==
+                   sizeof(v))
+                       return (sysctl_rdint(oldp, oldlenp, newp, v));
+               else
+                       return (EIO);   /*XXX*/
+#else
+               return (EOPNOTSUPP);
+#endif
        default:
                return (EOPNOTSUPP);
        }
diff -r 53bf2ed335b6 -r 53d3137ba94b sys/sys/sysctl.h
--- a/sys/sys/sysctl.h  Tue Jul 02 16:22:28 2002 +0000
+++ b/sys/sys/sysctl.h  Tue Jul 02 17:06:17 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sysctl.h,v 1.74 2002/03/20 00:23:46 christos Exp $     */
+/*     $NetBSD: sysctl.h,v 1.75 2002/07/02 17:06:19 itojun Exp $       */
 
 /*
  * Copyright (c) 1989, 1993
@@ -180,7 +180,11 @@
 #define        KERN_SBMAX              58      /* int: max socket buffer size */
 #define        KERN_TKSTAT             59      /* tty in/out counters */
 #define        KERN_MONOTONIC_CLOCK    60      /* int: POSIX monotonic clock */
-#define        KERN_MAXID              61      /* number of valid kern ids */
+#define        KERN_URND               61      /* int: random integer from urandom */
+#ifndef _KERNEL
+#define        KERN_ARND               KERN_URND       /* compat w/ openbsd */
+#endif
+#define        KERN_MAXID              62      /* number of valid kern ids */
 
 #define        CTL_KERN_NAMES { \
        { 0, 0 }, \
@@ -244,6 +248,7 @@
        { "sbmax", CTLTYPE_INT }, \
        { "tkstat", CTLTYPE_NODE }, \
        { "monotonic_clock", CTLTYPE_INT }, \
+       { "urandom", CTLTYPE_INT }, \
 }
 
 /*