---
name: "genpat"
section: "1"
platform: "linux"
package: "nsis"
version: "3.11-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/GenPat"
---

# genpat(1)

A program to create patch files in VPatch format.

Part of [GenPat(1)](/GenPat/1.md).

## NAME

GenPat - A program to create patch files in VPatch format.

## SYNOPSIS

**GenPat** \[**-R**\] \[**-B=***64*\] \[**-V**\] \[**-O**\] \[**-A=***500*\] \[*source*\] \[*target*\] \[*patch.pat*\]

## DESCRIPTION

This manual page documents briefly the **GenPat** command.

This manual page was written for the Debian (TM) distribution because the original program does not have a manual page. Instead, it has documentation in the HTML format; see below.

**GenPat** is a program that creates installer programs for Windows.

## OPTIONS

- **-R**

  Replace a patch with same contents as source silently if it already exists.

- **-B=***64*

  Set blocksize (default=64), multiple of 2 is required.

- **-V**

  More verbose information during patch creation.

- **-O**

  Deactivate match limit of the -A switch (sometimes smaller patches).

- **-A=***500*

  Maximum number of block matches per block (improves performance). Default is 500, larger is slower. Use -V to see the cut-off aborts.

## EXIT STATUS

0

Success

1

Arguments missing

2

Other error

3

Source file already has a patch in specified patch file (=error)

## SEE ALSO

GenPat is documented more fully in the HTML file /usr/share/doc/nsis/Docs/VPatch/Readme.html.

## AUTHOR

**Paul Wise** \<pabs@debian.org\>

This manual page was written by Paul Wise \<pabs@debian.org\> for the Debian (TM) system.

## COPYRIGHT

Copyright © 2005 Paul Wise\