docs/depmod: and example of depmod in shell/sed/awk...

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+#!/bin/sh
+#
+# Simple depmod, use to generate modprobe.conf
+#
+# Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
+#
+# Licensed under GPLv2
+#
+
+local BASE="${1:-/usr/lib/modules}"
+
+find "$BASE" -name '*.ko.gz' | while read I ; do
+        N=`basename "$I" '.ko.gz'`
+        echo -n "@$N"
+        zcat "$I" | strings | grep '^depends=' | sed -e 's/^depends=$//' -e 's/^depends=/,/' -e 's/,/ @/g'
+done | awk '
+{
+        # modules which has no dependencies are resolved
+        if ( NF == 1 ) { res[$1] = ""; next }
+        # others have to be resolved based on those which already resolved
+        i = $1; $1 = ""; deps[i] = $0; ++ndeps
+}
+END {
+        # resolve implicit dependencies
+        while ( ndeps ) for (mod in deps) {
+                if ( index(deps[mod], "@") > 0 ) {
+                        $0 = deps[mod]
+                        for ( i=1; i<=NF; ++i ) {
+                                if ( substr($i,1,1) == "@" ) {
+                                        if ( $i in res ) {
+                                                $i = res[$i] " " substr($i,2)
+                                        }
+                                }
+                        }
+                        deps[mod] = $0
+                } else {
+                        res[mod] = deps[mod]
+                        delete deps[mod]
+                        --ndeps
+                }
+        }
+
+        # output dependencies in modules.dep format
+        for ( mod in res ) {
+                $0 = res[mod]
+                s = ""
+                delete a
+                for ( i=1; i<=NF; ++i ) {
+                        if ( ! ($i in a) ) {
+                                a[$i] = $i
+                                s = " ," $i s
+                        }
+                }
+                print "," substr(mod,2) ":" s
+        }
+}
+' | sort | sed -r -e "s!,([^,: ]*)!/usr/lib/modules/\\1.ko.gz!g"