systemd/sysusers.prov
Luca BRUNO 21ca64d8e0
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
```
2021-11-16 16:36:58 +00:00

62 lines
1.4 KiB
Bash
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