Re: Q's about IBM TSM (was Re: HEADSUP: ibcs2 and svr4 compat headed for history)

From: Daniel O'Connor (doconnor_at_gsoft.com.au)
Date: 06/30/04

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    To: freebsd-current@freebsd.org
Date: Wed, 30 Jun 2004 12:11:21 +0930

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    On Wed, 30 Jun 2004 01:11, Paul Mather wrote:
    > I'm using the Linux 5.1.5.15 TSM client on a FreeBSD 5.2.1-RELEASE-p8
    > system. (See previous message in this thread.) It was a bit finicky to
    > get going. I found I had better luck using emulators/linux_base-8 than
    > emulators/linux_base, though I did get it running under both. One
    > hurdle for most people is that the client aborts with an out of memory
    > error during file activities. I discovered that this is caused by
    > having an empty or missing /compat/linux/etc/mtab file. Creating a
    > proper mtab file solves these problems. One way to do this is via
    > something like the following:
    >
    > sed 's/ufs/ext2/' < /etc/fstab > /compat/linux/etc/mtab
    >
    > That way, the Linux TSM "sees" your UFS partitions and will
    > backup/restore to them.

    I wonder if it could work with an LD_PRELOAD or some other linker trickery..

    ie replace open()/read()/write() with something that looks for /etc/mtab and
    instead opens /etc/fstab and translates it on the fly..

    I don't use TSM though so I couldn't test it :)

    (BTW linux_devtools can be used to make something like this, I wrote one for
    the TeamSpeak port to hide an unimplemented sound ioctl)

    - --
    Daniel O'Connor software and network engineer
    for Genesis Software - http://www.gsoft.com.au
    "The nice thing about standards is that there
    are so many of them to choose from."
      -- Andrew Tanenbaum
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