1XDELTA3(1)                  General Commands Manual                 XDELTA3(1)
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NAME

6       xdelta3 - VCDIFF (RFC 3284) binary diff tool
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SYNOPSIS

9       xdelta3 [command] [options] [input [output]]
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DESCRIPTION

12       xdelta3  is  a  binary diff tool that uses the VCDIFF (RFC 3284) format
13       and compression.
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COMMANDS

16       config prints xdelta3 configuration
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18       decode decompress the input, also set by -d
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20       encode compress the input, also set by -e (default)
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22       test   run the builtin tests
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24       printdelta
25              print information about the entire delta
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27       printhdr
28              print information about the first window
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30       printhdrs
31              print information about all windows
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33       recode encode with new application/secondary settings
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OPTIONS

37       standard options:
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39       -0 .. -9
40              compression level
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42       -c     use stdout
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44       -d     decompress
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46       -e     compress
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48       -f     force overwrite
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50       -F     force the external-compression subprocess
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52       -h     show help
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54       -q     be quiet
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56       -v     be verbose (max 2)
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58       -V     show version
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61       memory options:
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63       -B     bytes source window size
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65       -W     bytes input window size
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67       -P     size compression duplicates window
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69       -I     size instruction buffer size (0 = unlimited)
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72       compression options:
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74       -s     source source file to copy from (if any)
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76       -S [djw|fgk]
77              enable/disable secondary compression
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79       -N     disable small string-matching compression
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81       -D     disable external decompression (encode/decode)
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83       -R     disable external recompression (decode)
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85       -n     disable checksum (encode/decode)
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87       -C     soft config (encode, undocumented)
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89       -A [apphead]
90              disable/provide application header (encode)
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92       -J     disable output (check/compute only)
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94       -T     use alternate code table (test)
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96       -m     arguments for "merge"
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NOTES

100       The XDELTA environment variable may contain extra args:
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102              XDELTA="-s source-x.y.tar.gz" \
103              tar --use-compress-program=xdelta3 -cf \
104              target-x.z.tar.gz.vcdiff target-x.y/
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EXAMPLES

108       Compress the differences between SOURCE and TARGET, yielding OUT, using
109       "djw" secondary compression:
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111       xdelta3 -S djw -s SOURCE TARGET OUT
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113       Do the same, using standard input and output:
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115       xdelta3 -S djw -s SOURCE < TARGET > OUT
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117       To decompress OUT, using SOURCE, yielding TARGET:
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119       xdelta3 -d -s SOURCE OUT TARGET
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AUTHOR

123       xdelta3 was written by Josh MacDonald <josh.macdonald@gmail.com>.
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125       This    manual    page   was   written   by   Leo   'costela'   Antunes
126       <costela@debian.org> for the Debian project (but may be  used  by  oth‐
127       ers).
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131Xdelta3                           August 2013                       XDELTA3(1)