systemd/sysusers.prov
Luca BRUNO 8117c94f49 sysusers/provides: parse and output static IDs
This adds support for parsing static UIDs and GIDs from sysusers.d
fragments, and automatically forwarding them to the generated
'Provides' entries.
It will allow inspecting users/groups with static IDs directly
from package metadata:
```
$ rpm --query --provides --package gdm-41.0-3.fc36.x86_64.rpm
[...]
group(gdm) = 42
user(gdm) = 42
```
2021-11-19 18:26:05 +01:00

61 lines
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Executable file

#!/bin/bash
process_u() {
if [ ! -z "${2##*[!0-9]*}" ]; then
# Single shared static ID.
echo "user($1) = $2"
echo "group($1) = $2"
elif [[ $2 == *:* ]]; then
# UID:<group>.
uid=$(echo $2 | cut -d':' -f1 -)
group=$(echo $2 | cut -d':' -f2 -)
if [ ! -z "${group##*[!0-9]*}" ]; then
# UID:GID.
echo "user($1) = ${uid}"
echo "group($1) = ${group}"
else
# UID:<groupname>.
echo "user($1) = ${uid}"
echo "group(${group})"
fi
else
# Dynamic (or something else uninteresting).
echo "user($1)"
echo "group($1)"
fi
}
process_g() {
if [ ! -z "${2##*[!0-9]*}" ]; then
# Static GID.
echo "group($1) = $2"
else
# Dynamic (or something else uninteresting).
echo "group($1)"
fi
}
parse() {
while read line; do
[ "${line:0:1}" = '#' -o "${line:0:1}" = ';' ] && continue
line="${line## *}"
[ -z "$line" ] && continue
set -- $line
case "$1" in
('u')
process_u "$2" "$3"
;;
('g')
process_g "$2" "$3"
;;
('m')
echo "user($2)"
echo "group($3)"
;;
esac
done
}
while read fn; do
parse < "$fn"
done