[pmg-devel] [PATCH pmg-api v2 9/9] fix #4926: run pmg-smtp-filter and pmgpolicy without root rights

[Maximiliano Sandoval]

New users 'pmg-smpt-filter' and 'pmgpolicy' are created for their
respective processes and we set their systemd units to use them.

Signed-off-by: Maximiliano Sandoval <m.sandoval at proxmox.com>
---
 debian/pmg-smtp-filter.service |  2 ++
 debian/pmgpolicy.service       |  2 ++
 debian/postinst                | 28 ++++++++++++++++++++++++++++
 3 files changed, 32 insertions(+)

diff --git a/debian/pmg-smtp-filter.service b/debian/pmg-smtp-filter.service
index c887dc2..c4d5e38 100644
--- a/debian/pmg-smtp-filter.service
+++ b/debian/pmg-smtp-filter.service
@@ -16,6 +16,8 @@ Type=forking
 Restart=on-abort
 RestartSec=10
 RuntimeDirectory=pmg-smtp-filter
+User=pmg-smtp-filter
+Group=pmg-smtp-filter
 
 [Install]
 WantedBy=multi-user.target
diff --git a/debian/pmgpolicy.service b/debian/pmgpolicy.service
index 21a403f..cd8ee60 100644
--- a/debian/pmgpolicy.service
+++ b/debian/pmgpolicy.service
@@ -13,6 +13,8 @@ ExecReload=/bin/kill -HUP $MAINPID
 PIDFile=/run/pmgpolicy/pmgpolicy.pid
 Type=forking
 RuntimeDirectory=pmgpolicy
+User=pmgpolicy
+Group=pmgpolicy
 
 [Install]
 WantedBy=multi-user.target
diff --git a/debian/postinst b/debian/postinst
index 716a5af..a00c99b 100644
--- a/debian/postinst
+++ b/debian/postinst
@@ -50,6 +50,8 @@ migrate_apt_auth_conf() {
 
 migrate_pmg_smtp_filter() {
     PMG_GROUP="pmg"
+    PMGPOLICY_USER="pmgpolicy"
+    PMG_SMTP_FILTER_USER="pmg-smtp-filter"
 
     # Add shared pmg group for shared functionality, e.g. rrdcached
     if ! getent group | grep -q "^$PMG_GROUP:" ; then
@@ -58,6 +60,32 @@ migrate_pmg_smtp_filter() {
         echo "..done"
     fi
 
+    for user in $PMGPOLICY_USER $PMG_SMTP_FILTER_USER; do
+        if ! getent passwd | grep -q "^$user:"; then
+            echo -n "Adding system user $user.."
+            adduser --quiet \
+                --system \
+                --no-create-home \
+                --disabled-password \
+                --home /nonexistent \
+                --group \
+                $user 2>/dev/null || true
+            echo "..done"
+        fi
+
+        if ! getent group $PMG_GROUP | grep -q "$user"; then
+            echo -n "Adding user $user to $PMG_GROUP group.."
+            adduser --quiet $user $PMG_GROUP 2>/dev/null ||true
+            echo "..done"
+        fi
+
+        if ! getent group systemd-journal | grep -q $user ; then
+            echo -n "Adding user $user to systemd-journal group.."
+            adduser --quiet $user systemd-journal 2>/dev/null ||true
+            echo "..done"
+        fi
+    done
+
     chown :pmg /var/spool/pmg/active
     chown :pmg /var/spool/pmg/virus
     chown :pmg /var/spool/pmg/spam
-- 
2.39.2