centos man page for applydeltarpm

APPLYDELTARPM(8)					      System Manager's Manual						  APPLYDELTARPM(8)

NAME
       applydeltarpm - reconstruct an rpm from a deltarpm

SYNOPSIS
       applydeltarpm [-v] [-p] [-r oldrpm] deltarpm newrpm
       applydeltarpm -c|-C deltarpm
       applydeltarpm [-c|-C] -s sequence
       applydeltarpm -i deltarpm

DESCRIPTION
       applydeltarpm  applies a binary delta to either an old rpm or to on-disk data to re-create a new rpm. The old rpm can be specified with the
       -r option, if no rpm name is provided on-disk data is used. You can use -p to make applydeltarpm print the percentage of completion, or	-v
       to make it more verbose about its operation.

       The second an third form can be used to check if the reconstruction is possible. It may fail if the on-disk data got changed (deltarpms are
       created in a way that config file changes do not matter) or the deltarpm does not match the rpm the delta was generated with. The -c option
       selects full (i.e. slow) on-disk checking, whereas -C only checks if the filesizes have not changed.

       Instead	of  a full deltarpm a sequence id can be given with the -s sequence option. Such an id contains all the information that is needed
       to do reconstruction checking.

       Finally information about a deltarpm can be printed with the -i option.

MEMORY CONSIDERATIONS
       applydeltarpm was written to work on systems with limited memory.  It uses a paging algorithm to keep the size of in-core data low and  not
       bring the system in an out-of-memory situation.

EXIT STATUS
       applydeltarpm  returns  0  if  the  rpm could be recreated or the checking succeeded, it returns 1 and prints an error message to stderr if
       something failed.

SEE ALSO
       makedeltarpm(8), rpm(8)

AUTHOR
       Michael Schroeder <mls@suse.de>

								     Feb 2005							  APPLYDELTARPM(8)