uncompvm(1M)                                                      uncompvm(1M)



NAME
     uncompvm - expand a compressed IRIX vmcore dump of the operating system

SYNOPSIS
     /etc/uncompvm [ -h ] [ -s max_mbytes ] corename [ outfile ]

DESCRIPTION
     uncompvm expands IRIX vmcore.n.comp files into standard vmcore.n files.

     Under some circumstances, an IRIX operating system core dump may be made
     in a special compressed format.  Running file(1) on a vmcore.n.comp file
     yields something like the following:

          vmcore.0.comp:  IRIX vmcore dump of  'IRIX abu stever-j 03080214 IP19'

     uncompvm without any command-line options uncompresses these into files
     of up to the size of the physical memory on the system that created the
     dump.  For this reason, it may not be advisable to expand such dumps.  If
     outfile is not specified, uncompvm expands the dump into vmcore.n without
     the .comp extension.

     The options are:

     -h              Header mode.  In header mode, uncompvm does not
                     uncompress the entire dump file, but rather decodes the
                     dump header which contains information about the system
                     and the reason it created a vmcore file.

     -s max_mbytes   Specifies the maximum size of the expanded vmcore.n file
                     in megabytes.

EXAMPLE
          uncompvm -s 16 vmcore.0.comp

     This uncompresses vmcore.0.comp into vmcore.0, truncating the size of
     vmcore.0 to 16 megabytes if necessary.

DIAGNOSTICS
     uncompvm: filename is not an IRIX compressed dump file! is printed if
     uncompvm doesn't recognize the file as a compressed dump file.

SEE ALSO
     savecore(1M).












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