[PATCH] setup: Use systemd sysusers mechanism to create users/groups

[Stefan Schantl <stefan.schantl@ipfire.org>]

[-- Attachment #1: Type: text/plain, Size: 2914 bytes --]

The sysusers files will be generated by the corresponding script file,
based on the passwd and group file in the source directory.

So we easily can edit the files stored in git and the changes will be
taken.

Signed-off-by: Stefan Schantl <stefan.schantl(a)ipfire.org>
---
 dbus/dbus.sysusers                   |  7 +++++++
 setup/generate-sysusers-fragments.sh | 31 ++++++++++++++++++++++++++++
 setup/setup.nm                       |  7 ++++++-
 3 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 dbus/dbus.sysusers
 create mode 100755 setup/generate-sysusers-fragments.sh

diff --git a/dbus/dbus.sysusers b/dbus/dbus.sysusers
new file mode 100644
index 000000000..2ed994442
--- /dev/null
+++ b/dbus/dbus.sysusers
@@ -0,0 +1,7 @@
+#Type Name ID REMARK Home directory Shell
+
+# Dbus group
+g dbus 61
+
+# Dbus user
+u dbus 61 "User for dbus service" / /usr/sbin/nologin	 
diff --git a/setup/generate-sysusers-fragments.sh b/setup/generate-sysusers-fragments.sh
new file mode 100755
index 000000000..194c7204b
--- /dev/null
+++ b/setup/generate-sysusers-fragments.sh
@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+#SPDX-License-Identifier: 0BSD
+
+set -euo pipefail
+
+test -f group
+test -f passwd
+
+mkdir -p sysusers.d
+
+while read -r line; do
+  groupname=$(echo "${line}" | cut -d: -f1)
+  gid=$(echo "${line}" | cut -d: -f3)
+  echo "g ${groupname} ${gid}"
+done <group >sysusers.d/20-setup-groups.conf
+
+while read -r line; do
+  username=$(echo "${line}" | cut -d: -f1)
+  uid=$(echo "${line}" | cut -d: -f3)
+  gid=$(echo "${line}" | cut -d: -f4)
+  gecos=$(echo "${line}" | cut -d: -f5)
+  homedir=$(echo "${line}" | cut -d: -f6)
+  if [ "${homedir}" == "/" ]; then
+    homedir="-"
+  fi
+  shell=$(echo "${line}" | cut -d: -f7)
+  if [ "${shell}" == "/usr/sbin/nologin" ]; then
+    shell="-"
+  fi
+  echo "u ${username} ${uid}:${gid} \"${gecos}\" ${homedir} ${shell}"
+done <passwd >sysusers.d/20-setup-users.conf
diff --git a/setup/setup.nm b/setup/setup.nm
index cee66fab4..d4fd041ec 100644
--- a/setup/setup.nm
+++ b/setup/setup.nm
@@ -5,7 +5,7 @@
 
 name       = setup
 version    = 3.0
-release    = 18
+release    = 19
 arch       = noarch
 
 groups     = Base Build System/Base
@@ -29,6 +29,7 @@ build
 	end
 
 	build
+		bash ./generate-sysusers-fragments.sh
 		bash ./shadowconvert.sh
 	end
 
@@ -69,6 +70,10 @@ build
 		echo "d /run/motd.d 0755 root root -" >> %{BUILDROOT}%{tmpfilesdir}/%{name}.conf
 		chmod 0644 %{BUILDROOT}%{tmpfilesdir}/%{name}.conf
 
+		# Install generated sysusers files.
+		mkdir -pv %{BUILDROOT}%{sysusersdir}
+		install -v -m 0644 %{DIR_APP}/sysusers.d/*.conf %{BUILDROOT}%{sysusersdir}
+
 		mkdir -pv %{BUILDROOT}%{sysconfdir}/sysctl.d
 		install -m 644 %{DIR_APP}/sysctl/printk.conf \
 			%{BUILDROOT}%{sysconfdir}/sysctl.d/printk.conf
-- 
2.30.2