applydeltarpm(8) - phpMan

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 comple-
tion, 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 algo-
rithm 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.