mksquashfs: add '-min-sparse-copy <size>' option#335
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apeters1971 wants to merge 1 commit intoplougher:masterfrom
Open
mksquashfs: add '-min-sparse-copy <size>' option#335apeters1971 wants to merge 1 commit intoplougher:masterfrom
apeters1971 wants to merge 1 commit intoplougher:masterfrom
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This allows instead of copying full contents into an image to put a sparse file of the same size for all files which are atleast of size <size>. E.g. when using '-min-sparse-copy 1' the image contains only files with '0' bytes as contents and their original file size. For 'min-sparse-copy 1000' all files with atleast 1000 bytes contain only '0' as contents. Skip duplicate pre-check for synthetic sparse placeholders to avoid routing transient buffers through write_file_blocks_dup(), and fix long-option parsing for --min-sparse-copy=<size>.
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This allows instead of copying full contents into an image to put a sparse file of the same size for all files which are atleast of size . E.g. when using '-min-sparse-copy 1' the image contains only files with '0' bytes as contents and their original file size. For 'min-sparse-copy 1000' all files with atleast 1000 bytes contain only '0' as contents.