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kmod - Linux kernel module handling
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Emil Velikov d6cd6c74d2 libkmod: use a dup()'d fd for zlib 
The gzdopen() API used, takes ownership of the fd. To make that more
explicit we clear it (-1) as applicable.

Yet again, kmod has explicit API to return the fd to the user - which
currently is used solely when uncompressed, so we're safe.

Regardless - simply duplicate the fd locally and use that with zlib.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
2024-04-30 12:33:52 -05:00
libkmod libkmod: use a dup()'d fd for zlib 2024-04-30 12:33:52 -05:00
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shared libkmod: add fallback MODULE_INIT_COMPRESSED_FILE define 2023-09-27 22:37:45 -05:00
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README.md

kmod - Linux kernel module handling

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Information

Mailing list: linux-modules@vger.kernel.org (no subscription needed) https://lore.kernel.org/linux-modules/

Signed packages: http://www.kernel.org/pub/linux/utils/kernel/kmod/

Git: git://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git http://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git

Gitweb: http://git.kernel.org/?p=utils/kernel/kmod/kmod.git https://github.com/kmod-project/kmod

Irc: #kmod on irc.freenode.org

License: LGPLv2.1+ for libkmod, testsuite and helper libraries GPLv2+ for tools/*

OVERVIEW

kmod is a set of tools to handle common tasks with Linux kernel modules like insert, remove, list, check properties, resolve dependencies and aliases.

These tools are designed on top of libkmod, a library that is shipped with kmod. See libkmod/README for more details on this library and how to use it. The aim is to be compatible with tools, configurations and indexes from module-init-tools project.

Compilation and installation

In order to compiler the source code you need following software packages: - GCC compiler - GNU C library

Optional dependencies: - ZLIB library - LZMA library - ZSTD library - OPENSSL library (signature handling in modinfo)

Typical configuration: ./configure CFLAGS="-g -O2" --prefix=/usr
--sysconfdir=/etc --libdir=/usr/lib

Configure automatically searches for all required components and packages.

To compile and install run: make && make install

Hacking

Run 'autogen.sh' script before configure. If you want to accept the recommended flags, you just need to run 'autogen.sh c'.

Make sure to read the CODING-STYLE file and the other READMEs: libkmod/README and testsuite/README.

Compatibility with module-init-tools

kmod replaces module-init-tools, which is end-of-life. Most of its tools are rewritten on top of libkmod so it can be used as a drop in replacements. Somethings however were changed. Reasons vary from "the feature was already long deprecated on module-init-tools" to "it would be too much trouble to support it".

There are several features that are being added in kmod, but we don't keep track of them here.

modprobe

  • 'modprobe -l' was marked as deprecated and does not exist anymore

  • 'modprobe -t' is gone, together with 'modprobe -l'

  • modprobe doesn't parse configuration files with names not ending in '.alias' or '.conf'. modprobe used to warn about these files.

  • modprobe doesn't parse 'config' and 'include' commands in configuration files.

  • modprobe from m-i-t does not honour softdeps for install commands. E.g.: config:

      install bli "echo bli"

    install bla "echo bla" softdep bla pre: bli

    With m-i-t, the output of 'modprobe --show-depends bla' will be: install "echo bla"

    While with kmod: install "echo bli" install "echo bla"

  • kmod doesn't dump the configuration as is in the config files. Instead it dumps the configuration as it was parsed. Therefore, comments and file names are not dumped, but on the good side we know what the exact configuration kmod is using. We did this because if we only want to know the entire content of configuration files, it's enough to use find(1) in modprobe.d directories

depmod

  • there's no 'depmod -m' option: legacy modules.*map files are gone

lsmod

  • module-init-tools used /proc/modules to parse module info. kmod uses /sys/module/*, but there's a fallback to /proc/modules if the latter isn't available