1 .TH XDELTA3 "1" "August 2009" "Xdelta3"
3 xdelta3 \- VCDIFF (RFC 3284) binary diff tool
12 is a binary diff tool that uses the VCDIFF (RFC 3284) format and compression.
16 prints xdelta3 configuration
19 decompress the input, also set by -d
22 compress the input, also set by -e (default)
28 print information about the entire delta
31 print information about the first window
34 print information about all windows
37 encode with new application/secondary settings
82 compression duplicates window
86 instruction buffer size (0 = unlimited)
93 source file to copy from (if any)
96 enable/disable secondary compression
99 disable small string-matching compression
102 disable external decompression (encode/decode)
105 disable external recompression (decode)
108 disable checksum (encode/decode)
111 soft config (encode, undocumented)
114 disable/provide application header (encode)
117 disable output (check/compute only)
120 use alternate code table (test)
125 environment variable may contain extra args:
128 XDELTA="-s source-x.y.tar.gz" \\
130 tar --use-compress-program=xdelta3 -cf \\
132 target-x.z.tar.gz.vcdiff target-x.y/
136 Compress the differences between SOURCE and TARGET, yielding OUT,
137 using "djw" secondary compression:
139 xdelta3 -S djw -s SOURCE TARGET OUT
141 Do the same, using standard input and output:
143 xdelta3 -S djw -s SOURCE < TARGET > OUT
145 To decompress OUT, using SOURCE, yielding TARGET:
147 xdelta3 -d -s SOURCE OUT TARGET
150 xdelta3 was written by Josh MacDonald <josh.macdonald@gmail.com>.
152 This manual page was written by Leo 'costela' Antunes <costela@debian.org>
153 for the Debian project (but may be used by others).