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+.\"-
+.\" Copyright (c) 2007 Robert N. M. Watson
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd October 30, 2007
+.Dt PROCSTAT 1
+.Os
+.Sh NAME
+.Nm procstat
+.Nd get detailed process information
+.Sh SYNOPSIS
+.Nm
+.Op Fl h
+.Op Fl w Ar interval
+.Op Fl b | c | f | k | s | t | v
+.Op Fl a | Ar pid ...
+.Sh DESCRIPTION
+The
+.Nm
+utility displays detailed information about the processes identified by the
+.Ar pid
+arguments, or if the
+.Fl a
+flag is used, all processes.
+.Pp
+By default, basic process statistics are printed; one of the following
+options may be specified in order to select more detailed process information
+for printing:
+.Bl -tag -width indent
+.It Fl b
+Display binary information for the process.
+.It Fl c 
+Display command line arguments for the process.
+.It Fl f
+Display file descriptor information for the process.
+.It Fl k
+Display the stacks of kernel threads in the process, excluding stacks of
+threads currently running on a CPU and threads with stacks swapped to disk.
+If the flag is repeated, function offsets as well as function names are
+printed.
+This feature requires
+.Cd "options STACK"
+or
+.Cd "options DDB"
+to be compiled into the kernel.
+.It Fl s
+Display security credential information for the process.
+.It Fl t
+Display thread information for the process.
+.It Fl v
+Display virtual memory mappings for the process.
+.El
+.Pp
+All options generate output in the format of a table, the first field of
+which is the process ID to which the row of information corresponds.
+The
+.Fl h
+flag may be used to suppress table headers.
+.Pp
+The
+.Fl w
+flag may be used to specify a wait interval at which to repeat the printing
+of the requested process information.
+If the
+.Fl w
+flag is not specified, the output will not repeat.
+.Pp
+Some information, such as VM and file descriptor information, is available
+only to the owner of a process or the superuser.
+.Sh EXIT STATUS
+.Ex -std
+.Sh SEE ALSO
+.Xr fstat 1 ,
+.Xr ps 1 ,
+.Xr sockstat 1 ,
+.Xr DDB 4 ,
+.Xr stack 9
+.Sh AUTHORS
+.An Robert N M Watson
+.Sh BUGS
+Some field values may include spaces, which limits the extent to which the
+output of
+.Nm
+may be mechanically parsed.
+.Pp
+The display of open file or memory mapping pathnames is implemented using the
+kernel's name cache.
+It therefore does not work for file systems
+that do not use the name cache, such as
+.Xr devfs 4 ,
+or if the name is not present in the cache due to removal.