3 files changed, 32 insertions, 14 deletions
diff --git a/Completion/BSD/Type/_jails b/Completion/BSD/Type/_jails
index 36bffeceb..89e34ba4f 100644
--- a/Completion/BSD/Type/_jails
+++ b/Completion/BSD/Type/_jails
@@ -1,5 +1,33 @@
 #autoload
 
-jails=( ${${${${(f)"$(_call_program jails jls -n)"}##*jid=}/ name=/:}%% *} )
+# Options:
+#
+# -0        include jid 0 as a match for the host system
+# -o param  jail parameter to complete instead of jid -
+#              e.g. name, path, ip4.addr, host.hostname
 
-_describe -t jails jail jails "$@"
+local addhost host param desc=1
+local -a jails args expl
+zparseopts -D -K -E 0=addhost o:=param
+param=${param[2]:-name}
+
+jails=( ${${(f)"$(_call_program jails jls $param name)"}/ /:} )
+case $param in
+  jid) host=0 ;;
+  name)
+    host=0
+    desc=0
+  ;;
+  path)
+    host=/
+    args=( -M 'r:|/=* r:|=*' )
+  ;;
+  ip4.addr) args=( -M 'r:|.=* r:|=*' ) ;;
+esac
+[[ -n $addhost && -n $host ]] && jails+=( "$host:$HOST" )
+
+if (( desc )); then
+  _describe -t jails jail jails "$@" "$args[@]"
+else
+  _wanted jails expl jail compadd "$@" "$args[@]" - ${jails%:*}
+fi
diff --git a/Completion/Unix/Command/_pgrep b/Completion/Unix/Command/_pgrep
index 3af55a379..d3dcd1812 100644
--- a/Completion/Unix/Command/_pgrep
+++ b/Completion/Unix/Command/_pgrep
@@ -8,7 +8,7 @@ arguments=('-P[parent process id]:parent process id:->ppid'
      '-F[match only in process in pidfile]:files:_files'
      '-g[match only in process group ids]:group:->pgid'
      '-G[match only real group id]:group:_groups'
-     '-j[match only in processes inside jails]:jail id:->jid'
+     '-j[match only in processes inside jails]:jail id:_sequence _jails -0 -o jid'
      '-J[match only in project ids]:project id:->projid'
      '-M[extract the name list from the specified core]:files:_files'
      '-N[extract the name list from the specified system]:files:_files'
@@ -93,16 +93,6 @@ case $state in
     _wanted sid expl 'session id' compadd -S ',' -q -F used $sid
     ;;
 
-  (jid)
-    compset -P '*,'
-
-    local -a used jid
-    used=(${(s:,:)IPREFIX})
-    jid=(${(uon)$(ps -ax -o jid=)})
-
-    _wanted jid expl 'jail id' compadd -S ',' -q -F used $jid
-    ;;
-
   (ppid)
     compset -P '*,'
 
diff --git a/Completion/Unix/Command/_ps b/Completion/Unix/Command/_ps
index 925f48390..e557b27b9 100644
--- a/Completion/Unix/Command/_ps
+++ b/Completion/Unix/Command/_ps
@@ -160,7 +160,7 @@ if (( CURRENT > 1 )) && [[ $OSTYPE != solaris* || ( $OSTYPE = linux-gnu && $word
       _wanted -C option-k-1 properties expl 'property' _sequence -s , _ps_props -s - && return
     ;;
     *G) _sequence -s , _groups && return ;;
-    *J) _sequence -s , _jails && return ;;
+    *J) _sequence _jails -0 && return ;;
     *[MNW]) _files && return ;;
     *t)
       _wanted -C option-t-1 ttys expl tty _sequence -s , \