RAPATCH2(1)

✨ RAPATCH2(1) — binary patching utility ✨

okay bestie, so rapatch2 is a binary patching utility 💅 it's the section-1 manual page for it, and honestly? it's a whole vibe. let's get into it 🫶

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🌸 SYNOPSIS 🌸

rapatch2 [-psRqv] [patchfile] [targetfile]

that's the whole shape of it, babes. flags, then the patch file, then the target file. no cap. ✨

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🦋 DESCRIPTION 🦋

so this is a utility for applying binary patches to files using a human-friendly text format. yes queen, human-friendly. not some cursed hex-dump nightmare. 💖

the patches have to be written in a file, and they use this syntax here — writing them EXACTLY like this, character for character:

^# -> comments
! -> execute command
OFFSET { code block }
OFFSET "string"
OFFSET 01020304
OFFSET : assembly
+ {code}|"str"|0210|: asm

that's it, that's the grammar bestie, iykyk 😌 ^# for comments, ! to execute a command, an OFFSET followed by a code block, a string, raw hex bytes, or some assembly with :. and that last line? + {code}|"str"|0210|: asm — alternate forms, the way that it just lets you mix and match. iconic fr fr 🌈

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✨ OPTIONS ✨

• -p N — Patch level; skip N directories. like, N of them. gone. bye 💅
• -R — Reverse patch. undo arc, main character energy 👑
• -s — Sandbox mode: disable scripts and r2 command execution. safety first, gorgeous 🎀
• -q — be quiet 🤫
• -v — show version ⭐

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💜 ENVIRONMENT 💜

real talk: rapatch2 does not use any environment variables.

not a single one. zero. the environment could be empty and it would not care, and honestly? that's self-care 🌸

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🍓 EXAMPLES 🍓

1. generate a patch with radiff2 and then apply it with rapatch2: 🔥

$ radiff2 -u bin1 bin2 > patch
$ rapatch2 -p 1 < patch

2. patch a specific file:

$ rapatch2 bin1 patch

3. create a simple patch file manually: (yes, by hand, we're artisanal now 😭)

$ cat > mypatch.r2
0x100 "Hello World"
0x200 9090
0x300 : nop
^D
$ rapatch2 target_binary mypatch.r2

look at you, hand-writing offsets and a lil nop and everything. slay 🫶

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👑 SEE ALSO 👑

• radare2(1)
• radiff2(1)

(the whole fam, go read them too 💖)

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🌈 AUTHORS 🌈

Written by pancake <pancake@nopcode.org>.

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and that's the tea, bestie 🦋 this page is from Jul 10, 2025, man page RAPATCH2(1) — you now know binary patching better than half the internet. periodt. 💅✨