UserParameter not working

[whitehat]

Hi!
Added two UserParameter strings into zabbix_agentd.conf:

UserParameter=mdstat[*],grep -A1 $1 /proc/mdstat | grep -c UU                                                    
UserParameter=smartd[*],/usr/bin/sudo /usr/sbin/smartctl -H /dev/$1|/bin/grep -c PASSED

First string works great and returns real values,

52sh-3.2$ whoami 
zabbix
sh-3.2$ grep -A1 md0 /proc/mdstat | grep -c U
1

and in log

88:20100723:201620.808 Requested [mdstat[md0]]
  5288:20100723:201620.814 Run remote command [grep -A1 md0 /proc/mdstat | grep -c U] Result [1] [1]...

but the second always returns "0"

sh-3.2$ /usr/bin/sudo /usr/sbin/smartctl -H /dev/sda|/bin/grep -c PASSED
1

but in log

 5288:20100723:201846.891 Requested [smartd[sda]]
  5288:20100723:201846.898 Run remote command [/usr/bin/sudo /usr/sbin/smartctl -H /dev/sda|/bin/grep -c PASSED] Result [1] [0]...

Why? (the second value should be 1)

[Wonderer]

UserParameter commands are run with zabbix user permissions.
Are you sure that sudo has proper rights set for the zabbix user?

Try to log as zabbix user, and then run you command.

[whitehat]

UserParameter commands are run with zabbix user permissions.
Are you sure that sudo has proper rights set for the zabbix user?

Try to log as zabbix user, and then run you command.

Hi. I've already done so, as you can see from my first post. Zabbix is in the sudoers without password...

[whitehat]

solved

The problem was with "sudo" command:
You must add string:
Defaults:zabbix !requiretty
with visudo