[src/trunk]: src/sys/compat/linux/common allow writing of kernel.version, ker...

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

details:   https://anonhg.NetBSD.org/src/rev/d289a1510ef7
branches:  trunk
changeset: 522514:d289a1510ef7
user:      christos <christos%NetBSD.org@localhost>
date:      Wed Feb 20 17:02:48 2002 +0000

description:
allow writing of kernel.version, kernel.osrelease, kernel.ostype... I might
revert that l8r if I come up with something better.

diffstat:

 sys/compat/linux/common/linux_sysctl.c |  33 ++++++++++++++++++++++++---------
 1 files changed, 24 insertions(+), 9 deletions(-)

diffs (64 lines):

diff -r 3a9f2bfc194a -r d289a1510ef7 sys/compat/linux/common/linux_sysctl.c
--- a/sys/compat/linux/common/linux_sysctl.c    Wed Feb 20 16:10:34 2002 +0000
+++ b/sys/compat/linux/common/linux_sysctl.c    Wed Feb 20 17:02:48 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: linux_sysctl.c,v 1.1 2002/02/15 20:02:56 christos Exp $        */
+/*     $NetBSD: linux_sysctl.c,v 1.2 2002/02/20 17:02:48 christos Exp $        */
 
 /*-
  * Copyright (c) 1982, 1986, 1989, 1993
@@ -43,7 +43,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_sysctl.c,v 1.1 2002/02/15 20:02:56 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_sysctl.c,v 1.2 2002/02/20 17:02:48 christos Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -168,9 +168,17 @@
        return (error);
 }
 
-extern char linux_sysname[];
-extern char linux_release[];
-extern char linux_version[];
+/*
+ * NOTE: DO NOT CHANGE THIS
+ * Linux makes assumptions about specific features being present with
+ * more recent kernels. Specifically, LinuxThreads use RT queued
+ * signals if the kernel release is bigger. Since we don't support them
+ * yet, the version needs to stay this way until we'd have the RT queued
+ * signals implemented.
+ */
+char linux_sysname[128] = "Linux";
+char linux_release[128] = "2.0.38";
+char linux_version[128] = "#0 Sun Apr 1 11:11:11 MET 2000";
 
 /*
  * kernel related system variables.
@@ -179,13 +187,20 @@
 linux_kern_sysctl(int *name, u_int nlen, void *oldp, size_t *oldlenp,
     void *newp, size_t newlen, struct proc *p)
 {
+       /*
+        * Note that we allow writing into this, so that userland
+        * programs can setup things as they see fit. This is suboptimal.
+        */
        switch (name[0]) {
        case LINUX_KERN_OSTYPE:
-               return sysctl_rdstring(oldp, oldlenp, newp, linux_sysname);
+               return sysctl_string(oldp, oldlenp, newp, newlen,
+                   linux_sysname, sizeof(linux_sysname));
        case LINUX_KERN_OSRELEASE:
-               return sysctl_rdstring(oldp, oldlenp, newp, linux_release);
-       case KERN_VERSION:
-               return sysctl_rdstring(oldp, oldlenp, newp, linux_version);
+               return sysctl_string(oldp, oldlenp, newp, newlen,
+                   linux_release, sizeof(linux_release));
+       case LINUX_KERN_VERSION:
+               return sysctl_string(oldp, oldlenp, newp, newlen,
+                   linux_version, sizeof(linux_version));
        default:
                return EOPNOTSUPP;
        }