applydeltarpm - reconstruct an rpm from a deltarpm
applydeltarpm [-v] [-p] [-r oldrpm] deltarpm newrpm
applydeltarpm -c|-C deltarpm
applydeltarpm [-c|-C] -s sequence
applydeltarpm -i deltarpm
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.
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.
applydeltarpm returns 0 if the rpm could be recreated or the checking
succeeded, it returns 1 and prints an error message to stderr if some‐
SEE ALSOmakedeltarpm(8), rpm(8)AUTHOR
Michael Schroeder <email@example.com>
Feb 2005 APPLYDELTARPM(8)