COMBINEDELTARPM

Section: Maintenance Commands (8)
Updated: May 2005
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NAME

combindeltarpm - combine multiple deltarpms to a single one

SYNOPSIS

combinedeltarpm [-v] [-V version] [-z compression] [-S signaturerpm] olddeltarpms... newdeltarpm

DESCRIPTION

combinedeltarpm creates a new deltarpm from multiple old ones. Applying the resulting deltarpm has the same effect as applying each of the old ones in the specified order. Use the -v option to make combinedeltarpm more verbose about its work.

combinedeltarpm normally produces a V3 format deltarpm, use the -V option to specify a different version if desired. The -z option can be used to specify a different compression method, the default is to use the same compression method as used in the last of the old deltarpms.

If you want to use a different header signature you can also specify a rpm with the -S option which will be used as signature reference. This feature can be used to if a deltarpm was made against an unsigned rpm which later got signed.

MEMORY CONSIDERATIONS

The implementation of combinedeltarpm currently unpacks the add-blocks of the deltarpms in memory, thus it needs about twice the uncompressed payload size of the target rpm.

AUTHOR

Michael Schroeder <mls@suse.de>