+def_ucmd who {
+ if {[ta_anymore]} {
+ set target [ta_word]; ta_nomore
+ set myself 1
+ } else {
+ prefix_nick
+ set target $n
+ set myself [expr {"$target" != "$n"}]
+ }
+ upvar #0 nick_case([irctolower $target]) nc
+ set nshow $target
+ if {[info exists nc]} {
+ upvar #0 nick_onchans($nc) oc
+ upvar #0 nick_username($nc) nu
+ if {[info exists oc]} { set nshow $nc }
+ }
+ if {![nickdb_exists $target]} {
+ set ol "$nshow is not a registered nick."
+ } elseif {[string length [set username [nickdb_opt $target username]]]} {
+ set ol "The nick $nshow belongs to the user $username."
+ } else {
+ set ol "The nick $nshow is registered (but not to a username)."
+ }
+ if {![info exists nc] || ![info exists oc]} {
+ if {$myself} {
+ append ol "\nI can't see $nshow on anywhere."
+ } else {
+ append ol "\nYou aren't on any channels with me."
+ }
+ } elseif {![info exists nu]} {
+ append ol "\n$nshow has not identified themselves."
+ } elseif {![info exists username]} {
+ append ol "\n$nshow has identified themselves as the user $nu."
+ } elseif {"$nu" != "$username"} {
+ append ol "\nHowever, $nshow is being used by the user $nu."
+ } else {
+ append ol "\n$nshow has identified themselves to me."
+ }
+ ucmdr {} $ol
+}
+