Man Depmod en anglais
depmod(8)                                                            depmod(8)



 

NAME


       depmod -- program to generate modules.dep and map files.

 

SYNOPSIS


       depmod [-b basedir]  [-e]  [-F System.map]  [-n]  [-v]  [version]  [-A]

       depmod [-e]  [-FSystem.map]  [-n]  [-v]  [version]  [filename ...]

 

DESCRIPTION






       Linux kernel modules can provide services (called "symbols") for  other
       modules  to  use (using EXPORT_SYMBOL in the code).  If a second module
       uses this symbol, that second module clearly depends on the first  mod-
       ule.  These dependencies can get quite complex.


       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
       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).


       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").


       depmod will also generate various map files in this directory, for  use
       by the hotplug infrastructure.


 

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.


       -C --config file or directory
                 This  option  overrides  the   default   configuration   file
                 (/etc/depmod.conf or /etc/depmod.d/ if that is not found).


       -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).


       -F --filesyms System.map
                 Supplied  with  the  System.map  produced when the kernel was
                 built, this allows the -e option to  report  unresolved  sym-
                 bols.


       -h --help Print the help message, and exit.


       -n --dry-run
                 This  sends  the  resulting modules.dep, then the various map
                 files, to standard output, rather than writing them into  the
                 module directory.


       -v --verbose
                 In verbose mode depmod will print (to stdout) all the symbols
                 each module depends on and the module's file name which  pro-
                 vides that symbol.


       -V --version
                 Show version of program, and exit. See below for caveats when
                 run on older kernels.


 

BACKWARDS COMPATIBILITY


       This version of depmod is for kernels 2.5.48 and above.  If it  detects
       a  kernel  with support for old-style modules, or the version specified
       is before 2.5.48, it will attempt to run depmod.old in its place, so it
       is completely transparent to the user.


 

COPYRIGHT


       This manual page Copyright 2002, Rusty Russell, IBM Corporation.


 

SEE ALSO


       modprobe(8), modules.dep(5), depmod.old(8)



                                                                     depmod(8)