[Pkg-net-snmp-devel] Bug#992328: snmpd init script isn't sourcing /etc/default/snmpd, uses always default parameters

[Marcel Meckel]

Package: snmpd
Version: 5.7.3+dfsg-5+deb10u2

When starting snmpd on a non-systemd machine the init script

   /etc/init.d/snmpd

fails to source the file

   /etc/default/snmpd

which results in SNMPDOPTS specified in the default file
being ignored:

   % grep ^SNMPDOPTS /etc/default/snmpd
   SNMPDOPTS='-Lf /dev/null -u Debian-snmp -g Debian-snmp -I 
-smux,mteTrigger,mteTriggerConf -p /run/snmpd.pid'

   % service snmpd restart
   [ ok ] Restarting SNMP Services: snmpd.

   % ps auxf|grep snmpd
   Debian-+  3480  0.0  0.0  33872  8344 ?        S    12:28   0:00 
/usr/sbin/snmpd -Lsd -Lf /dev/null -u Debian-snmp -g Debian-snmp -I 
-smux mteTrigger mteTriggerConf -p /run/snmpd.pid

Please note the parameter "-Lsd" to snmpd in the process list
which is not present in SNMPDOPTS in /etc/default/snmpd.

Snippet from the init script:

   DEFAULT_SNMPDOPTS="-Lsd -Lf /dev/null -u Debian-snmp -g Debian-snmp -I 
-smux,mteTrigger,mteTriggerConf"
   [ -z "$SNMPDOPTS" ] && SNMPDOPTS=$DEFAULT_SNMPDOPTS

It checks $SNMPDOPTS which isn't defined because the defaults file 
wasn't sourced.

The init script from snmpd from stretch has these lines:

   # Reads config file (will override defaults above)
   [ -r /etc/default/snmpd ] && . /etc/default/snmpd

After updating snmpd from stretch to buster the default file is being 
ignored.

This affects

   buster (oldstable) snmpd-5.7.3+dfsg-5+deb10u2
   bullseye  (stable) snmpd-5.9+dfsg-3+b1