Added tunctl (since it is difficult to find for many distros).

contrib/bochs/.cvsignore

 parport.out
 ne2k-tx.log
 ne2k-txdump.txt
-
+tunctl

contrib/bochs/Makefile

-all : serial-console.1
+all : tunctl serial-console.1
 
 %.1 : %
 	pod2man $< > $@
 
+tunctl : tunctl.c
+	$(CC) -o $@ $<
+
 clean :
-	rm -f serial-console.1
+	rm -f serial-console.1 tunctl

contrib/bochs/README

 
 To get bochs running is fairly simple:
 
-1.  Get the bochs source code:
+1.  Build the utilities in this directory
+      make
+
+2.  Get the bochs source code:
       cvs -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/bochs login
       cvs -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/bochs co bochs
 
-2.  Configure bochs with
+3.  Configure bochs with
       pushd bochs
       ./configure --enable-all-optimisations --enable-pci --enable-pnic
                   --enable-debugger --enable-magic-breakpoints --enable-disasm
       popd
 
-3.  Build bochs:
+4.  Build bochs:
       make -C bochs
 
-4.  Set up a TAP virtual network device:
+5.  Set up a TAP virtual network device:
       modprobe tun
-      tunctl -u <username> -t tap0
+      ./tunctl -u <username> -t tap0
       ifconfig tap0 up 10.254.254.2 netmask 255.255.255.0
 
-5.  Add the following fragment to /etc/dhcpd.conf:
+6.  Add the following fragment to /etc/dhcpd.conf:
       subnet 10.254.254.0 netmask 255.255.255.252 {
         range dynamic-bootp 10.254.254.1 10.254.254.1;
       }
     machine you are using for running Bochs.  If not, then you're on
     your own.
 
-6.  Restart dhcpd
+7.  Restart dhcpd
       /etc/init.d/dhcpd restart
 
-7.  Build Etherboot images
+8.  Build Etherboot images
       pushd ../../src
       make bin/pnic.dsk
       popd
 
-8.  Start Bochs
+9.  Start Bochs
       ./bochs/bochs -q
     You should get to the debugger prompt "<bochs:1>".  Type "c" to
     start running Bochs.

contrib/bochs/tunctl.c

+/* Copyright 2002 Jeff Dike
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <linux/if_tun.h>
+
+static void Usage(char *name)
+{
+  fprintf(stderr, "Create: %s [-b] [-u owner] [-t device-name] "
+	  "[-f tun-clone-device]\n", name);
+  fprintf(stderr, "Delete: %s -d device-name [-f tun-clone-device]\n\n", 
+	  name);
+  fprintf(stderr, "The default tun clone device is /dev/net/tun - some systems"
+	  " use\n/dev/misc/net/tun instead\n\n");
+  fprintf(stderr, "-b will result in brief output (just the device name)\n");
+  exit(1);
+}
+
+int main(int argc, char **argv)
+{
+  struct ifreq ifr;
+  struct passwd *pw;
+  long owner = geteuid();
+  int tap_fd, opt, delete = 0, brief = 0;
+  char *tun = "", *file = "/dev/net/tun", *name = argv[0], *end;
+
+  while((opt = getopt(argc, argv, "bd:f:t:u:")) > 0){
+    switch(opt) {
+      case 'b':
+        brief = 1;
+        break;
+      case 'd':
+        delete = 1;
+	tun = optarg;
+        break;
+      case 'f':
+	file = optarg;
+	break;
+      case 'u':
+	pw = getpwnam(optarg);
+	if(pw != NULL){
+	  owner = pw->pw_uid;
+	  break;
+	}
+        owner = strtol(optarg, &end, 0);
+	if(*end != '\0'){
+	  fprintf(stderr, "'%s' is neither a username nor a numeric uid.\n",
+		  optarg);
+	  Usage(name);
+	}
+        break;
+      case 't':
+        tun = optarg;
+        break;
+      case 'h':
+      default:
+        Usage(name);
+    }
+  }
+
+  argv += optind;
+  argc -= optind;
+
+  if(argc > 0)
+    Usage(name);
+
+  if((tap_fd = open(file, O_RDWR)) < 0){
+    fprintf(stderr, "Failed to open '%s' : ", file);
+    perror("");
+    exit(1);
+  }
+
+  memset(&ifr, 0, sizeof(ifr));
+
+  ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+  strncpy(ifr.ifr_name, tun, sizeof(ifr.ifr_name) - 1);
+  if(ioctl(tap_fd, TUNSETIFF, (void *) &ifr) < 0){
+    perror("TUNSETIFF");
+    exit(1);
+  }
+
+  if(delete){
+    if(ioctl(tap_fd, TUNSETPERSIST, 0) < 0){
+      perror("TUNSETPERSIST");
+      exit(1);
+    }    
+    printf("Set '%s' nonpersistent\n", ifr.ifr_name);
+  }
+  else {
+    if(ioctl(tap_fd, TUNSETPERSIST, 1) < 0){
+      perror("TUNSETPERSIST");
+      exit(1);
+    }
+    if(ioctl(tap_fd, TUNSETOWNER, owner) < 0){
+      perror("TUNSETPERSIST");
+      exit(1);
+    } 
+    if(brief)
+      printf("%s\n", ifr.ifr_name);
+    else printf("Set '%s' persistent and owned by uid %ld\n", ifr.ifr_name, 
+		owner);
+  }
+  return(0);
+}