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DEPMOD.D
Section: depmod.d (5)Updated: 07/28/2020
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NAME
depmod.d - Configuration directory for depmodSYNOPSIS
/usr/lib/depmod.d/*.conf
/etc/depmod.d/*.conf
DESCRIPTION
The order in which modules are processed by the depmod command can be altered on a global or per-module basis. This is typically useful in cases where built-in kernel modules are complemented by custom built versions of the same and the user wishes to affect the priority of processing in order to override the module version supplied by the kernel.
The format of files under depmod.d is simple: one command per line, with blank lines and lines starting with '#' ignored (useful for adding comments). A '\' at the end of a line causes it to continue on the next line, which makes the files a bit neater.
COMMANDS
search subdirectory...
-
This allows you to specify the order in which /lib/modules (or other configured module location) subdirectories will be processed by
depmod. Directories are listed in order, with the highest priority given to the first listed directory and the lowest priority given to the last directory listed. The special keyword
built-in
refers to the standard module directories installed by the kernel.
By default, depmod will give a higher priority to a directory with the name updates using this built-in search string: "updates built-in" but more complex arrangements are possible and are used in several popular distributions.
override modulename kernelversion modulesubdirectory
-
This command allows you to override which version of a specific module will be used when more than one module sharing the same name is processed by the
depmod
command. It is possible to specify one kernel or all kernels using the * wildcard.
modulesubdirectory
is the name of the subdirectory under /lib/modules (or other module location) where the target module is installed.
For example, it is possible to override the priority of an updated test module called kmod by specifying the following command: "override kmod * extra". This will ensure that any matching module name installed under the extra subdirectory within /lib/modules (or other module location) will take priority over any likenamed module already provided by the kernel.
COPYRIGHT
This manual page Copyright 2006-2010, Jon Masters, Red Hat, Inc.
SEE ALSO
depmod(8)
AUTHORS
Jon Masters <jcm@jonmasters.org>
- Developer
Robby Workman <rworkman@slackware.com>
- Developer
Lucas De Marchi <lucas.de.marchi@gmail.com>
- Developer
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DEPMOD
Section: depmod (8)Updated: 07/28/2020
Index Return to Main Contents
NAME
depmod - Generate modules.dep and map files.SYNOPSIS
-
depmod [-b basedir] [-e] [-E Module.symvers] [-F System.map] [-n] [-v] [-A] [-P prefix] [-w] [version]
- depmod [-e] [-E Module.symvers] [-F System.map] [-m] [-n] [-v] [-P prefix] [-w] [version] [filename...]
DESCRIPTION
depmod creates a list of module dependencies by reading each module under /lib/modules/version and determining what symbols it exports and what symbols it needs. By default, this list is written to modules.dep, and a binary hashed version named modules.dep.bin, in the same directory. If filenames are given on the command line, only those modules are examined (which is rarely useful unless all modules are listed). depmod also creates a list of symbols provided by modules in the file named modules.symbols and its binary hashed version, modules.symbols.bin. Finally, depmod will output a file named modules.devname if modules supply special device names (devname) that should be populated in /dev on boot (by a utility such as systemd-tmpfiles).
If a version is provided, then that kernel version's module directory is used rather than the current kernel version (as returned by uname -r).
OPTIONS
-a, --all
- Probe all modules. This option is enabled by default if no file names are given in the command-line.
-A, --quick
- This option scans to see if any modules are newer than the modules.dep file before any work is done: if not, it silently exits rather than regenerating the files.
-b basedir, --basedir basedir
- If your modules are not currently in the (normal) directory /lib/modules/version, but in a staging area, you can specify a basedir which is prepended to the directory name. This basedir is stripped from the resulting modules.dep file, so it is ready to be moved into the normal location. Use this option if you are a distribution vendor who needs to pre-generate the meta-data files rather than running depmod again later.
-C, --config file or directory
- This option overrides the default configuration directory at /etc/depmod.d/.
-e, --errsyms
- When combined with the -F option, this reports any symbols which a module needs which are not supplied by other modules or the kernel. Normally, any symbols not provided by modules are assumed to be provided by the kernel (which should be true in a perfect world), but this assumption can break especially when additionally updated third party drivers are not correctly installed or were built incorrectly.
-E, --symvers
- When combined with the -e option, this reports any symbol versions supplied by modules that do not match with the symbol versions provided by the kernel in its Module.symvers. This option is mutually incompatible with -F.
-F, --filesyms System.map
- Supplied with the System.map produced when the kernel was built, this allows the -e option to report unresolved symbols. This option is mutually incompatible with -E.
-h, --help
- Print the help message and exit.
-n, --show, --dry-run
- This sends the resulting modules.dep and the various map files to standard output rather than writing them into the module directory.
-P
- Some architectures prefix symbols with an extraneous character. This specifies a prefix character (for example '_') to ignore.
-v, --verbose
- In verbose mode, depmod will print (to stdout) all the symbols each module depends on and the module's file name which provides that symbol.
-V, --version
- Show version of program and exit. See below for caveats when run on older kernels.
-w
- Warn on duplicate dependencies, aliases, symbol versions, etc.
COPYRIGHT
This manual page originally Copyright 2002, Rusty Russell, IBM Corporation. Portions Copyright Jon Masters, and others.
SEE ALSO
depmod.d(5), modprobe(8), modules.dep(5)
AUTHORS
Jon Masters <jcm@jonmasters.org>
- Developer
Robby Workman <rworkman@slackware.com>
- Developer
Lucas De Marchi <lucas.de.marchi@gmail.com>
- Developer
Index
This document was created by man2html, using the manual pages.
Time: 04:46:00 GMT, September 16, 2022
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