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HTML rendering created 2026-01-16 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | EXIT STATUS | EXAMPLES | SEE ALSO | COLOPHON |
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GENDIFF(1) General Commands Manual GENDIFF(1)
gendiff - Utility to aid in error-free diff file generation
gendiff DIRECTORY DIFF-EXTENSION
gendiff is a tool for generating a diff file from a single
directory. The generated diff can be applied with the patch(1)
program to recreate the changes.
gendiff looks for any files with DIFF-EXTENSION as their extension
in the specified DIRECTORY, and runs diff(1) on the files with
DIFF-EXTENSION and the counterpart without it, in that order. This
allows for generating diffs from source code without making a full
copy of the directory, which you'd otherwise need when using the
diff(1) utility directly.
gendiff is commonly used to creating patches for the purposes of
packaging software with rpmbuild(1).
DIRECTORY
The directory to generate a diff from.
DIFF-EXTENSION
The diff extension to look for.
On success, 0 is returned, a nonzero failure code otherwise.
Assuming you need to modify a source file called somefile.cpp and
have chosen the extension fix, copy it to somefile.cpp.fix before
editing it. Then edit the original file (somefile.cpp).
After editing all the files you need to edit in this fashion,
enter the directory one level above where the source code resides,
and run gendiff on it:
gendiff myproject-1.0 .fix > myproject-1.0-fix.patch
diff(1), patch(1)
This page is part of the rpm (RPM Package Manager) project.
Information about the project can be found at
⟨https://github.com/rpm-software-management/rpm⟩. It is not known
how to report bugs for this man page; if you know, please send a
mail to man-pages@man7.org. This page was obtained from the
project's upstream Git repository
⟨https://github.com/rpm-software-management/rpm.git⟩ on
2026-01-16. (At that time, the date of the most recent commit
that was found in the repository was 2026-01-15.) If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a
mail to man-pages@man7.org
RPM 6.0.90 2026-01-16 GENDIFF(1)
Pages that refer to this page: rpmbuild(1)
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HTML rendering created 2026-01-16 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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