Linux ADSM Mini-Howto
  by Thomas König, Thomas.Koenig@ciw.uni-karlsruhe.de
  $Date: 1997/01/15 20:36:34 $

  This document describes how to install and use a client for the com­
  mercial ADSM backup system for Linux/i386.

  1.  Introduction

  ADSM is a network-based backup system, sold by IBM, in use at many
  organizations.  There are clients for a large variety of systems
  (different UNIX brands, Windows, Novell, Mac, Windows NT).
  Unfortunately, at the time of this writing, there is no native Linux
  version.

  You will have to use the SCO binary, and install the iBCS2-emulator
  for running ADSM.  This description is for ADSM v2r1.

  At the time if this writing, I am only aware of a version which works
  with the i386 version of Linux.

  2.  Installing the iBCS module

  The iBCS2 module is available from
  ftp://tsx-11.mit.edu/pub/linux/BETA/ibcs2.  If you are running kernel
  version 1.2.13, get ibcs-1.2-950721.tar.gz, unpac it and apply the
  patches ibcs-1.2-950808.patch1 and ibcs-1.2-950828.patch2.  You can
  then type "make" and install the iBCS modlue with "insmod".

  For a 2.0 kernel version, get ibcs-2.0-960610.tar.gz, unpack it in a
  suitable place, chdir into that directory, and apply the following
  patch:

  --- iBCSemul/ipc.c.orig Wed Jan 15 21:32:15 1997
  +++ iBCSemul/ipc.c      Wed Jan 15 21:32:31 1997
  @@ -212,7 +212,7 @@
          switch (command) {
                  case U_SEMCTL:
                          cmd = ibcs_sem_trans(arg3);
  -                       arg4 = (union semun *)get_syscall_parameter (regs, 4);
  +                       arg4 = (union semun *)(((unsigned long *) regs->esp) + (5));
                          is_p = (struct ibcs_semid_ds *)get_fs_long(arg4->buf);
   #ifdef IBCS_TRACE
                          if ((ibcs_trace & TRACE_API) || ibcs_func_p->trace)

  Then, copy CONFIG.i386 to CONFIG, and type make.

  If you don't have them already, create the needed device files by
  executing

  # cd /dev
  # ln -s null XOR
  # ln -s null X0R
  # mknod socksys c 30 0
  # mknod spx c 30 1

  3.  Installing the ADSM client

  The SCO binary is supplied as three tar files, or disks.  Change to
  the root directory, set your umask according to your policies, and
  unpack them from there (as root).  In your Directory /tmp, you will
  find an installation script; execute that.
  You will then have to hand-edit /usr/adsm/dsm.sys and
  /usr/adsm/dsm.opt.  In dsm.sys, important lines to specify are:

     Servername
        The name of the server

     TCPServeraddress
        The fully qualified host name of the server

     NODename
        Your own hostname

  In dsm.opt, you will have to specify

     Server
        As before

     Followsymbolic
        Wether or not to follow symbolic links (not a good idea, in
        general)

     SUbdir
        Wether to back up subdirectories (you usually want that)

     domain
        The file systems to back up

  You will then have to create a SCO-compatible /etc/mnttab from your
  /etc/fstab.  You can use the following Perl script, fstab2mnttab, for
  this.

       ______________________________________________________________________
       #!/usr/bin/perl

       $mnttab_struct = "a32 a32 I L";

       open(MTAB, "/etc/mtab") || die "Cannot open /etc/mtab: $!\n";
       open(MNTTAB, ">/etc/mnttab") || die "Cannot open /etc/mnttab: $!\n";

       while(<MTAB>) {
           next if /pid/;
           chop;
           /^(\S*)\s(\S*)\s(\S*)\s.*$/;
           $device = $1;
           $mountpt = $2;
           $fstype = $3;
           if($fstype ne "nfs" && $fstype ne "proc") {
               $mnttab_rec =
                   pack($mnttab_struct, $device, $mountpt, 0x9d2f, time());
               syswrite(MNTTAB, $mnttab_rec, 72);
               print "Made entry for: $device $mountpt $fstype\n";
           }
       }

       close(MNTTAB);
       exit 0;
       ______________________________________________________________________

  You do not need to install any shared libraries for these clients;
  everything is linked statically.

  4.  Running the client

  There are two clients, dsm, which is an X11 interface, and dsmc, a
  command-line interface.  Your computer centre will tell you how to run
  it.  Some startup script at boot, for example

  dsmc schedule -quiet 2>&1 >/dev/null &

  will probably be required.

  5.  Known Problems

  Unfortunately, SCO can only deal with hostnames no longer than eight
  characters.  If your hostname is longer, or fully qualified, you may
  need to specify your hostname on the NODename line in
  /usr/adsm/dsm.sys.

  If you use the DISPLAY variable, you will have to supply the fully
  qualified host name (i.e. DISPLAY=host.full.do.main:0 instead of
  DISPLAY=host:0).