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129 lines
4.4 KiB
129 lines
4.4 KiB
2 months ago
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#! /bin/bash -efu
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# heavily based upon find-suggests.ksyms by Andreas Gruenbacher <agruen@suse.de>.
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# with modifications by Michael Brown <Michael_E_Brown@dell.com>
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#
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# -- added module versioning info to modalias() symbols
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# -- removed code which inspects spec files.
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IFS=$'\n'
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#
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# Initially, dont generate modalias() lines for kernel package. This needs
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# additional discussion. Would like to eventually add them for
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# completeness, so that we can determine when drivers are folded into
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# mainline kernel.
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#
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is_kernel_package=""
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case "${1:-}" in
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kernel-module-*) ;; # Fedora kernel module package names start with
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# kernel-module.
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kernel*) is_kernel_package=1 ;;
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esac
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if ! [ -z "$is_kernel_package" ]; then
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cat > /dev/null
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exit 0
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fi
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# Check for presence of the commands used.
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# "command" is a builtin, faster to use than fork+execing "which" - see
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# https://pubs.opengroup.org/onlinepubs/9699919799/utilities/command.html
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command -v /sbin/modinfo >/dev/null || exit 1
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command -v sed >/dev/null || exit 1
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command -v sort >/dev/null || exit 1
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print_modaliases() {
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local class="$1" variants="$2" pos="$3"
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if [ -n "$variants" ]; then
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echo "${class:0:pos}[$variants]${class:pos+1}"
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else
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[ -z "$class" ] || echo "$class"
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fi
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}
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# Try to make "provides" list a bit smaller:
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# find "mergeable" strings a-la
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# modalias(pci:v0000168Cd00000023sv*sd*bc*sc*i*)
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# modalias(pci:v0000168Cd00000024sv*sd*bc*sc*i*)
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# modalias(pci:v0000168Cd00000027sv*sd*bc*sc*i*)
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# modalias(pci:v0000168Cd00000029sv*sd*bc*sc*i*)
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# replace with
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# modalias(pci:v0000168Cd0000002[3479]sv*sd*bc*sc*i*)
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combine_modaliases() {
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local unused_len next prev variants="" pos="" n end xc
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# Due to set -e, we can exit with exitcode 1 on read EOF
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# and this makes our caller think we failed. "|| return 0" prevents this:
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IFS=' ' read unused_len prev || return 0
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# For each line after the first...
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while IFS=' ' read unused_len next; do
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if [ -z "$pos" ]; then
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# 2nd line: after "modalias(" prefix, for each char in prev line...
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n=9
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end=${#prev}
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# TODO speedup? if [ $end != ${#next} ]; then line is not mergeable
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else
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# 3rd+ lines: only check the char at the same position
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n=$pos
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end=$((pos + 1))
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fi
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# Search for aaaNbbb,aaaMbbb line pair, where N and M chars differ.
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# sort -u guarantees there are no identical line pairs.
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# We assume that lines will not differ only in " = version" suffix.
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for ((; n < $end; n++)); do
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if [ "${prev:0:n}" != "${next:0:n}" ]; then
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# the prefixes already aren't the same: break
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n=$end
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break
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fi
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# If suffixes differ, go to next char
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[ x"${prev:n+1}" != x"${next:n+1}" ] && continue
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# Found aaaNbbb,aaaMbbb. If N and M aren't special...
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xc=x"${prev:n:1}"
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[ x"[" = "$xc" -o x"]" = "$xc" ] && continue
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[ x"?" = "$xc" -o x"*" = "$xc" ] && continue
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xc=x"${next:n:1}"
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[ x"[" = "$xc" -o x"]" = "$xc" ] && continue
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[ x"?" = "$xc" -o x"*" = "$xc" ] && continue
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# Add M (and maybe N) to $variants, go to next line
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variants="${variants:-${prev:n:1}}${next:n:1}"
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pos=$n
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break
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done
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if [ $n -eq $end ]; then
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# This line is not mergeable with the previous one(s),
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# print collected merged line and reset the state
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print_modaliases "$prev" "$variants" "$pos"
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variants=""
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pos=""
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prev=$next
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fi
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done
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# Print last collected merged line
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print_modaliases "$prev" "$variants" "$pos"
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}
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for module in $(grep -E '/lib/modules/.+\.ko(\.gz|\.bz2|\.xz|\.zst)?$') "$@"; do
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modver=$(/sbin/modinfo -F version "$module")
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# delete possible extra lines because some modules have *two* version tags. *cough*b44*cough*
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modver=${modver%%$'\n'*} # using $'' bashism, avoid running "head -n1" process
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# replace any strange chars with underscores.
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# [!...] is glob's "match any char not in set" pattern
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# (although bash supports [^...] too, it is not standard)
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modver=${modver//[!0-9a-zA-Z._]/_}
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# only add version tag if it indeed has a version
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[ -z "$modver" ] || modver=" = $modver"
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/sbin/modinfo -F alias "$module" \
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| sed -E "s,[^][0-9a-zA-Z._:*?/-],_,g; s,(.+),modalias(\\1)$modver,"
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# Below: combining code can only possibly combine lines of equal length.
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# Prepend line lengths before sort, so that same-length lines end up next
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# to each other. (The lengths are discarded by combine_modaliases).
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done \
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| { while read line; do echo "${#line} $line"; done } \
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| LC_ALL=C sort -u \
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| combine_modaliases
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