VxWorks file systems and devices

[Simon Roberts]

Can someone help me with the following problem.  I can successfully create a ram drive and dos filesystem in VxWorks, but I can't write a file to it or read what is on it.  When I use the device name (i.e. "/dos") the command abruptly returns with a syntax error.

Has anyone had a problem similar to this before or know of a patch I must install?

Note, I have installed a patch for SPR22610 and I have INCLUDE_DOSFS and INCLUDE_RAMDRV included.  My target is a Motorola PPC (MVME2400).  The example below is taken from the WRS Tornado training course, so it should work!

Thanks,
Simon.
 
 

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   //////  //////  //////  //////  //////         |     T  O  R  N  A  D  O
    /////   /////   /////   /////   /////         |
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     /////   /////   /////   /////   /////        |    Development  System
      ////    ////    ////    ////    ////        |
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        ////    ////    ////    ////    ////      |    Host  Based   Shell
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           ///     ///     ///     ///     ///    |    Version  1.0.1
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      Copyright Wind River Systems, Inc., 1995-1997

C++ Constructors/Destructors Strategy is AUTOMATIC

-> pBlkDrv = ramDevCreate (0,1024,0,64,0)
new symbol "pBlkDrv" added to symbol table.
pBlkDrv = 0x5afc18: value = 67105440 = 0x3fff2a0
->
-> dosFsMkfs "/dos", pBlkDrv
value = 62893360 = 0x3bfad30
-> devs
drv name
  0 /null
  1 /tyCo/0
  5 wheelie:
  6 /pty/telnet.S
  7 /pty/telnet.M
  8 /vio
  3 /dos
value = 0 = 0x0
-> fd = creat ("/dos/simon",2)
syntax error
->
-> ls "/dos"
Parameter format not correct - "dos".
value = -1 = 0xffffffff
->

[Simon Roberts]

I've solved my problem (with help from WRS support).  If the session below is conducted in the target shell I can make it work.  I now appreciate the difference between host base shell commands and target based shells (run from the serial port normally) which aren't necessarily the same thing.

e.g. to access a dosfs called '/dos' on the target server with a host based shell you can't use 'ls' - the correct usage would be '@ls' to force the command to executed on the target and not the host.

Now wiser!
Simon.