--- linux-user/syscall.c.orig	2004-04-27 00:17:28.000000000 +0300
+++ linux-user/syscall.c	2004-04-27 11:02:20.000000000 +0300
@@ -51,6 +51,7 @@
 #include <netinet/ip.h>
 #include <netinet/tcp.h>
 #include <sys/un.h>
+#include <sys/sysctl.h>
 
 #define termios host_termios
 #define winsize host_winsize
@@ -2572,9 +2573,31 @@
         ret = get_errno(fdatasync(arg1));
         break;
     case TARGET_NR__sysctl:
-        /* We don't implement this, but ENODIR is always a safe
-           return value. */
-        return -ENOTDIR;
+        {
+            struct __sysctl_args *args = (struct __sysctl_args *) arg1;
+            int *name, nlen, *oldlenp, oldlen, newlen;
+            void *oldval, *newval;
+
+            name = (int *) tswapl((long) args->name);
+            nlen = tswapl(args->nlen);
+            oldval = (void *) tswapl((long) args->oldval);
+            oldlenp = (int *) tswapl((long) args->oldlenp);
+            oldlen = tswapl(*oldlenp);
+            newval = (void *) tswapl((long) args->newval);
+            newlen = tswapl(args->newlen);
+
+            if (nlen == 2 && name[0] == CTL_KERN && name[1] == KERN_VERSION) {
+                ret = get_errno(
+                        sysctl(name, nlen, oldval, &oldlen, newval, newlen));
+                if (!is_error(ret)) {
+                    *oldlenp = tswapl(oldlen);
+                }
+            } else {
+                gemu_log("qemu: Unsupported sysctl name\n");
+                ret = -ENOSYS;
+            }
+        }
+        break;
     case TARGET_NR_sched_setparam:
         {
             struct sched_param *target_schp = (void *)arg2;