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man/depmod.8.scd
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Emil Velikov
man: remove outdated COPYRIGHT section
03 фев 2026, 07:59
03 фев 2026, 07:59
cee17b5
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DEPMOD(8) "kmod" "depmod" # NAME depmod - Generate modules.dep and map files. # SYNOPSIS *depmod* [*-b* _basedir_] [*-m* _moduledir_] [*-o* _outdir_] [*-e*] [*-E* _Module.symvers_] \ \ \ \ \ \ \ \[*-F* _System.map_] [*-n*] [*-v*] [*-A*] [*-P* _prefix_] [*-w*] [_version_] *depmod* [*-e*] [*-E* _Module.symvers_] [*-F* _System.map_] [*-n*] [*-v*] [*-P* _prefix_] \ \ \ \ \ \ \ \[*-w*] [_version_] [_filename_] # DESCRIPTION Linux kernel modules can provide services (called "symbols") for other modules to use (using one of the EXPORT_SYMBOL variants in the code). If a second module uses this symbol, that second module clearly depends on the first module. These dependencies can get quite complex. *depmod* creates a list of module dependencies by reading each module under <BASEDIR>/<MODULEDIR>/_version_. By default <MODULEDIR> is @MODULE_DIRECTORY@ and <BASEDIR> is empty. See options below to override when needed. It determines what symbols each module exports and needs. 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_ Override the base directory <BASEDIR> where modules are located. If your modules are not currently in the (normal) directory @MODULE_DIRECTORY@/_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. If a relative path is given, it's relative to the current working directory. Example: depmod -b /my/build/staging/dir/ This expects all input files under _/my/build/staging/dir@MODULE_DIRECTORY@/$(uname -r)_ and generates index files under that same directory. *-m* _moduledir_, *--moduledir* _moduledir_ Override the module directory <MODULEDIR>, which defaults to @MODULE_DIRECTORY@ prefix set at build time. This is useful when building *modules.dep* file in _basedir_ for a system that uses a different prefix, e.g. _/usr/lib/modules_ vs _/lib/modules_. Relative and absolute paths are accepted, but they are always relative to the _basedir_. Examples: depmod -b /tmp/build -m /kernel-modules++ depmod -b /tmp/build -m kernel-modules This expects all input files under _/tmp/build/kernel-modules/$(uname -r)_ and generates index files under that same directory. Without an accompanying *-b* argument, the moduledir is relative to _/_. Example: depmod -m foo/bar This expects all input files under _/foo/bar/$(uname -r)_ and generates index files under the same directory. Unless libkmod is prepared to handle that arbitrary location, it won't work in runtime. *-o* _outdir_, *--outdir* _outdir_ Set the output directory where *depmod* will store any generated file. _outdir_ serves as a root to that location, similar to how _basedir_ is used. Also this setting takes precedence and if used together with _basedir_ it will result in the input being that directory, but the output being the one set by _outdir_. If a relative path is given, it's relative to the current working directory. Example: depmod -o /my/build/staging/dir/ This expects all input files under _@MODULE_DIRECTORY@/$(uname -r)_ and generates index files under _/my/build/staging/dir@MODULE_DIRECTORY@/$(uname -r)_. *-C* _file_ _or_ _directory_, *--config* _file_ _or_ _directory_ This option overrides the default configuration files. See *depmod.d*(5). *-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* _Module.symvers_, *--symvers* _Module.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* _System.map_, *--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. # SEE ALSO *depmod.d*(5), *modprobe*(8), *modules.dep*(5)