1 2#------------------------------------------------------------------------------ 3# $File: diff,v 1.21 2024/07/13 14:47:09 christos Exp $ 4# diff: file(1) magic for diff(1) output 5# 6# Update: Joerg Jenderek 7# URL: https://en.wikipedia.org/wiki/Diff 8# Reference: http://mark0.net/download/triddefs_xml.7z/defs/d/diff.trid.xml 9# Note: called "diff output text" by TrID and 10# "Differences between files" by shared MIME-info database from freedesktop.org 11# According to shared MIME-info database also tabulator character instead of space character and 12# by TrID minus character after space character 130 search/1 diff\040 diff output text 14# diff output text (strength=40=40+0) after unified diff output (strength=131=38+93) 15#!:strength +0 16!:mime text/x-diff 17#!:mime text/x-patch 18!:ext diff/patch 19# no short named pch dif examples found 20#!:ext diff/patch/dif/pch 21# URL: https://en.wikipedia.org/wiki/Diff_utility#Context_format 22# Reference: http://mark0.net/download/triddefs_xml.7z/defs/d/diff-context.trid.xml 23# Note: called "context diff output" by TrID 24# and "Differences between files" by shared MIME-info database from freedesktop.org 250 search/1 ***\040 26# context diff output text (strength=42=38+4) before 27# C source (strength=41,39,37) exported SGML document (strength=39,28) 28!:strength +4 29>&0 search/1024 \n---\040 context diff output text 30!:mime text/x-diff 31#!:mime text/x-patch 32!:ext diff/patch 33# no short named pch dif examples found 34#!:ext diff/patch/dif/pch 350 search/1 Only\040in\040 diff output text 36# diff output text output text (strength=38=38+0) after unified diff output (strength=131=38+93) 37#!:strength +0 38!:mime text/x-diff 39#!:mime text/x-patch 40!:ext diff 410 search/1 Common\040subdirectories:\040 diff output text 42!:mime text/x-diff 43 44# URL: https://en.wikipedia.org/wiki/Diff#Extensions 45# Reference: http://mark0.net/download/triddefs_xml.7z/defs/d/diff-rcs.trid.xml 46# Note: called "RCS/CVS diff output" by TrID 47# and "Differences between files" by shared MIME-info database from freedesktop.org 480 search/1 Index: RCS/CVS diff output text 49# RCS/CVS diff output text (strength=36=36+0) after unified diff output (strength=131=38+93) 50#!:strength +0 51!:mime text/x-diff 52#!:mime text/x-patch 53!:ext diff/patch 54 55# bsdiff: file(1) magic for bsdiff(1) output 56# Update: Joerg Jenderek 57# URL: http://www.daemonology.net/bsdiff/ 58# Reference: https://github.com/cperciva/bsdiff/blob/master/bsdiff-ra/FORMAT 59# http://mark0.net/download/triddefs_xml.7z/defs/b/bsdiff.trid.xml 60# Note: called "bsdiff patch" by TrID and and "BSDIFF" version 4.0 by DROID via PUID fmt/439 and 61# "Binary differences between files" by shared MIME-info database from freedesktop.org 620 string/b BSDIFF40 63# skip DROID fmt-439-signature-id-672.bsdiff with invalid new file segment length 0 64>16 long !0 bsdiff(1) patch file 65#!:mime application/octet-stream 66!:mime application/x-bsdiff 67!:ext bsdiff 68# new file length 69#>>8 lequad x \b, new length %lld 70# new file segment length 71#>>16 lelong x \b, new segment length %d 72# compressed header block length 73#>>20 lelong !0 \b, compressed header length %d 74# patch data block length 75#>>24 lequad x \b, data length %lld 76# look for bzip data by ./compress after message with 1 space at end 77>>0x20 indirect x \b, at 0x20 78 79# From: Joerg Jenderek 80# URL: https://www.chromium.org/developers/design-documents/software-updates-courgette/ 81# Reference: https://github.com/adobe/chromium/blob/master/courgette/third_party/bsdiff.h 82# http://mark0.net/download/triddefs_xml.7z/defs/b/bsdiff-chrome.trid.xml 83# Note: called "Courgette Binary Diff output" by TrID 84# the Courgette bsdiff tool use a total different file format compared with BSD variant from Colin Percival 850 string/b GBSDIF42 Courgette binary diff output 86#!:mime application/octet-stream 87!:mime application/x-patch 88!:ext patch/bsdiff 89# slen; length of the file to be patched 90#>8 ubelong x \b, source length %u 91# scrc32; CRC32 of the file to be patched 92>12 ubelong x \b, crc %#8.8x 93# dlen; length of the result file 94#>16 ubelong x \b, result length %u 95# cblen; length of the control block 96#>20 ubelong x \b, control length %u 97# difflen; length of the diff block 98#>24 ubelong x \b, patch length %u 99# extralen; length of the extra block 100#>28 ubelong x \b, extra length %u 101 102# unified diff 103# URL: http://fileformats.archiveteam.org/wiki/Unified_diff 104# https://en.wikipedia.org/wiki/Diff_utility#Unified_format 105# Reference: https://www.artima.com/weblogs/viewpost.jsp?thread=164293 106# http://mark0.net/download/triddefs_xml.7z/defs/d/diff-unified.trid.xml 107# Note: called "unified diff output" by TrID and 108# "Differences between files" by shared MIME-info database from freedesktop.org 109# use b flag to forces the test to be done for binary files (non ASCII text like with Ctrl-D Ctrl-V Ctrl-Z) 1100 search/4096/b ---\040 111!:strength + 93 112>0 use diff-unified 113# most samples are just pure ASCII text like: ShellR64.patch 1140 search/11054 ---\040 115# unified diff (strength=131=38+93) before 116# HTML document text (strength=170,90,71,53,52,51,49) POSIX shell script (fix-qt5.6-build.patch strength=130 ./commands) 117# JavaScript source (strength=112,84,81,80,79,78,72,69) C++ source (strength=71,70,69,68,67,54), 118# Python script (strength=69,67,63,60,58,57,56,54,52,37)LaTeX document text (strength=62,56,55,51,43) 119# TeX document (strength=51,38) C source (strength=41,39,37) 120# exported SGML document (strength=39,28) diff output text (strength=38=38+0) 121# Pascal source (strength=37) RCS/CVS diff (strength=36=36+0), 122# Algol 68 source (strength=?) CSV ASCII text (strength=?) 123!:strength + 93 124>0 use diff-unified 125# check for 3 characteristic lines of unified diff 1260 name diff-unified 127>0 search/11084 +++\040 128>>&0 search/1024 \n 129# at signs line sometimes other (with 2 space chars before) like: indent-header.patch 130>>>&0 search/2 @@\040- unified diff output text 131!:mime text/x-diff 132#!:mime text/x-patch 133# https://file-extension.net/seeker/file_extension_dif file_extension_pch file_extension_rej 134!:ext diff/patch/dif/pch/rej 135# GRR: mainly for debugging purpose for variants with text before real diff output 136>>>>0 string !---\040 137>>>>>0 string x \b, 1st line "%s" 138>>>>>>&1 string x \b, 2nd line "%s" 139>>>>>>>&1 string x \b, 3rd line "%s" 140 141# librsync -- the library for network deltas 142# 143# Copyright (C) 2001 by Martin Pool. You may do whatever you want with 144# this file. 145# 1460 belong 0x72730236 rdiff network-delta data 147 1480 belong 0x72730136 rdiff network-delta signature data 149>4 belong x (block length=%d, 150>8 belong x signature strength=%d) 151