release/src/router/busybox/examples/depmod

   1 #!/bin/sh
   2 #
   3 # Simple depmod, use to generate modprobe.conf
   4 #
   5 # Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
   6 #
   7 # Licensed under GPLv2
   8 #
   9
  10 local BASE="${1:-/usr/lib/modules}"
  11
  12 find "$BASE" -name '*.ko.gz' | while read I ; do
  13         N=`basename "$I" '.ko.gz'`
  14         echo -n "@$N"
  15         zcat "$I" | strings | grep '^depends=' | sed -e 's/^depends=$//' -e 's/^depends=/,/' -e 's/,/ @/g'
  16 done | awk '
  17 {
  18         # modules which has no dependencies are resolved
  19         if ( NF == 1 ) { res[$1] = ""; next }
  20         # others have to be resolved based on those which already resolved
  21         i = $1; $1 = ""; deps[i] = $0; ++ndeps
  22 }
  23 END {
  24         # resolve implicit dependencies
  25         while ( ndeps ) for (mod in deps) {
  26                 if ( index(deps[mod], "@") > 0 ) {
  27                         $0 = deps[mod]
  28                         for ( i=1; i<=NF; ++i ) {
  29                                 if ( substr($i,1,1) == "@" ) {
  30                                         if ( $i in res ) {
  31                                                 $i = res[$i] " " substr($i,2)
  32                                         }
  33                                 }
  34                         }
  35                         deps[mod] = $0
  36                 } else {
  37                         res[mod] = deps[mod]
  38                         delete deps[mod]
  39                         --ndeps
  40                 }
  41         }
  42
  43         # output dependencies in modules.dep format
  44         for ( mod in res ) {
  45                 $0 = res[mod]
  46                 s = ""
  47                 delete a
  48                 for ( i=1; i<=NF; ++i ) {
  49                         if ( ! ($i in a) ) {
  50                                 a[$i] = $i
  51                                 s = " ," $i s
  52                         }
  53                 }
  54                 print "," substr(mod,2) ":" s
  55         }
  56 }
  57 ' | sort | sed -r -e "s!,([^,: ]*)!/usr/lib/modules/\\1.ko.gz!g"