--- wait_on.1
+++ wait_on.1
@@ -42,8 +42,11 @@
 .Op Fl c
 .Op Fl h
 .Op Fl i
+.Op Fl p
+.Op Fl q
 .Op Fl v
 .Op Fl w
+.Op Fl x
 .Op Fl t Ar timeout
 .Ar
 .Sh DESCRIPTION
@@ -66,11 +69,19 @@
 .It Fl i
 Exit with an exit value that indicates to which file or directory an event has
 occured.
+.It Fl p
+Watch for processes IDs instead of files.
+.It Fl q
+Do not print error messages.
 .It Fl v
 Print version string, copyright notice and exit.
 .It Fl w
 Only exit when something is written (i.e. ignore all other types of events).
 Writing includes a file being added to a directory.
+.It Fl x
+Only exit when something is exited (i.e. ignore all other types of events).
+Makes sense only with
+.Fl p .
 .It Fl t
 Wait for
 .Ar timeout