#! /bin/bash -efu

# heavily based upon find-suggests.ksyms by Andreas Gruenbacher <agruen@suse.de>.

# with modifications by Michael Brown <Michael_E_Brown@dell.com>

#

# -- added module versioning info to modalias() symbols

# -- removed code which inspects spec files.

IFS=$'\n'

#

# Initially, dont generate modalias() lines for kernel package. This needs

# additional discussion. Would like to eventually add them for

# completeness, so that we can determine when drivers are folded into

# mainline kernel.

#

is_kernel_package=""

case "${1:-}" in

kernel-module-*)    ;; # Fedora kernel module package names start with

		       # kernel-module.

kernel*)	   is_kernel_package=1 ;;

esac

if ! [ -z "$is_kernel_package" ]; then

    cat > /dev/null

    exit 0

fi

# Check for presence of the commands used

which /sbin/modinfo >/dev/null || exit 0

which sed >/dev/null || exit 0

which sort >/dev/null || exit 0

print_modaliases() {

    declare class=$1 variants=$2 pos=$3

    if [ -n "$variants" ]; then

	echo "${class:0:pos}[$variants]${class:pos+1}"

    else

	[ -z "$class" ] || echo "$class"

    fi

}

combine_modaliases() {

    declare tag class variants="" pos="" n

    read class

    while read tag; do

	for ((n=0; n<${#class}; n++)); do

	    if [ "*" != "${class:n:1}" -a \

		 "${class:0:n}" = "${tag:0:n}" -a \

		 "${class:n+1}" = "${tag:n+1}" ] &&

	       ( [ -z "$pos" ] || [ $n = $pos ] ); then

		variants="${variants:-${class:n:1}}${tag:n:1}"

		pos=$n

		break

	    fi

	done

	if [ $n -eq ${#class} ]; then

	    print_modaliases "$class" "$variants" "$pos"

	    variants=

	    pos=

	    class=$tag

	fi

    done

    print_modaliases "$class" "$variants" "$pos"

}

for module in $(grep -E '/lib/modules/.+\.ko(\.gz|\.bz2|\.xz|\.zst)?$') "$@"; do

    # | head -n1 because some modules have *two* version tags. *cough*b44*cough*

    modver=$(/sbin/modinfo -F version "$module"| head -n1)

    modver=${modver//[^0-9a-zA-Z._]/_}

    # only add version tag if it has a version

    [ -z "$modver" ] || modver=" = $modver"

    /sbin/modinfo -F alias "$module" \

    | sed -nre "s,[^][0-9a-zA-Z._:*?/-],_,g; s,(.+),modalias(\\1)$modver,p"

done \

| sort -u \

| combine_modaliases