net-snmp: check that executable is used before testing for existance

The recipe for net-snmp has snmpd and snmptrapd in seperate packages, so one or the other
or both could be installed. In a common case where only snmpd is installed, the startup
script will fail to run because the snmptrapd executable does not exist.

This patch simply qualifies the test by first checking to see if the executable is to
be used.

    -Bill

Signed-off-by: Bill Randle <bill.randle@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>

meta-networking/recipes-protocols/net-snmp/files/init

@@ -3,9 +3,6 @@
 
 . /etc/init.d/functions
 
-test -x /usr/sbin/snmpd || exit 0
-test -x /usr/sbin/snmptrapd || exit 0
-
 # Defaults
 export MIBDIRS=/usr/share/snmp/mibs
 SNMPDRUN=yes
@@ -18,6 +15,9 @@ SPIDFILE=/var/run/snmptrapd.pid
 # Reads config file if exists (will override defaults above)
 [ -r /etc/default/snmpd ] && . /etc/default/snmpd
 
+[ "$SNMPDRUN" = "yes" ] && { test -x /usr/sbin/snmpd || exit 0; }
+[ "$TRAPDRUN" = "yes" ] && { test -x /usr/sbin/snmptrapd || exit 0; }
+
 case "$1" in
   start)
     echo -n "Starting network management services:"