-WHO <#channel|nick|mask> [o]
+WHO <#channel|nick|mask> [o][%format]
The WHO command displays information about a user,
such as their GECOS information, their user@host,
A second parameter of a lowercase letter o ensures
only IRC operators are displayed.
+The second parameter may also contain a format
+specification starting with a percent sign.
+This causes the output to use numeric 354,
+with the selected fields:
+
+t - Query type. Outputs the given number in each reply.
+c - Channel.
+u - Username.
+i - IP address.
+h - Host.
+s - Server.
+n - Nickname.
+f - Status.
+d - Hop count.
+l - Idle time or 0 for users on other servers.
+a - Services account name or 0 if none.
+r - GECOS information.
+
+"WHO #lamers %tuhnf,42" would generate a brief listing
+of channel members and include the number 42 in each
+line.
+
See also: whois, userhost, cmode, umode