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modalias.prov: rename "class" and "tag" variables to "prev" and "next"

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The old names are misleading.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
This commit is contained in:
Denys Vlasenko 2023-05-08 11:11:40 +02:00
parent 5683c50270
commit f46d3e8522
1 changed files with 14 additions and 13 deletions
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27
modalias.prov
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@ -51,18 +51,19 @@ print_modaliases() {
# replace with
# modalias(pci:v0000168Cd0000002[3479]sv*sd*bc*sc*i*)
combine_modaliases() {
local unused_len tag class variants="" pos="" n end xc
local unused_len next prev variants="" pos="" n end xc
# Due to set -e, we can exit with exitcode 1 on read EOF
# and this makes our caller think we failed. "|| return 0" prevents this:
IFS=' ' read unused_len class || return 0
IFS=' ' read unused_len prev || return 0
# For each line after the first...
while IFS=' ' read unused_len tag; do
while IFS=' ' read unused_len next; do
if [ -z "$pos" ]; then
# 2nd line: after "modalias(" prefix, for each char in prev line...
n=9
end=${#class}
end=${#prev}
# TODO speedup? if [ $end != ${#next} ]; then line is not mergeable
else
# 3rd+ lines: only check the char at the same position
n=$pos
@ -72,36 +73,36 @@ combine_modaliases() {
# sort -u guarantees there are no identical line pairs.
# We assume that lines will not differ only in " = version" suffix.
for ((; n < $end; n++)); do
if [ "${class:0:n}" != "${tag:0:n}" ]; then
if [ "${prev:0:n}" != "${next:0:n}" ]; then
# the prefixes already aren't the same: break
n=$end
break
fi
# If suffixes differ, go to next char
[ x"${class:n+1}" != x"${tag:n+1}" ] && continue
# aaaNbbb = aaaMbbb. If N and M aren't special...
xc=x"${class:n:1}"
[ x"${prev:n+1}" != x"${next:n+1}" ] && continue
# Found aaaNbbb,aaaMbbb. If N and M aren't special...
xc=x"${prev:n:1}"
[ x"[" = "$xc" -o x"]" = "$xc" ] && continue
[ x"?" = "$xc" -o x"*" = "$xc" ] && continue
xc=x"${tag:n:1}"
xc=x"${next:n:1}"
[ x"[" = "$xc" -o x"]" = "$xc" ] && continue
[ x"?" = "$xc" -o x"*" = "$xc" ] && continue
# Add M (and maybe N) to $variants, go to next line
variants="${variants:-${class:n:1}}${tag:n:1}"
variants="${variants:-${prev:n:1}}${next:n:1}"
pos=$n
break
done
if [ $n -eq $end ]; then
# This line is not mergeable with the previous one(s),
# print collected merged line and reset the state
print_modaliases "$class" "$variants" "$pos"
print_modaliases "$prev" "$variants" "$pos"
variants=""
pos=""
class=$tag
prev=$next
fi
done
# Print last collected merged line
print_modaliases "$class" "$variants" "$pos"
print_modaliases "$prev" "$variants" "$pos"
}
for module in $(grep -E '/lib/modules/.+\.ko(\.gz|\.bz2|\.xz|\.zst)?$') "$@"; do