- Add support for filtering the the list of providers by a regular

  expression, which makes it possible to only see interesting
  providers.  "f" is used inside gstat to set a filter, "F" is used to
  remove current filter.
- Do not print some uninteresting values in the gstat title line.
- Do not print past the end of the screen.
- Read multiple keystrokes per "wait" when gstat is running.
- Remove a redundant != check, right after check of NULL against the
  same variable ("gid").
- Use sysexits.h.
- Do not link against libkvm and libsbuf, they are not actually used.
- Fix a few style(9) issues where I had to touch nearby code anyway.

Approved by:	cperciva (mentor)
MFC after:	2 weeks

1 files changed, 10 insertions, 1 deletions

diff --git a/usr.sbin/gstat/gstat.8 b/usr.sbin/gstat/gstat.8
index 2dce5c3..08a92fb 100644
--- a/usr.sbin/gstat/gstat.8
+++ b/usr.sbin/gstat/gstat.8
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd March 3, 2003
+.Dd May 20, 2006
 .Dt GSTAT 8
 .Os
 .Sh NAME
@@ -33,6 +33,7 @@
 .Sh SYNOPSIS
 .Nm
 .Op Fl acd
+.Op Fl f Ar filter
 .Op Fl I Ar interval
 .Sh DESCRIPTION
 The
@@ -56,6 +57,14 @@ producers.
 Enable display of statistics for delete
 .Pq Dv BIO_DELETE
 operations.
+.It Fl f Ar filter
+A regular expression that can be used to only show statistics for some
+devices.
+Only devices which name match
+.Ar filter
+will be displayed.
+The format of the regular expression is described in
+.Xr re_format 7 .
 .It Fl I Ar interval
 Refresh the
 .Nm