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Linux 2.6 - man page for peekfd (linux section 1)

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PEEKFD(1)				  User Commands 				PEEKFD(1)

NAME
       peekfd - peek at file descriptors of running processes

SYNOPSIS
       peekfd  [-8,--eight-bit-clean]  [-n,--no-headers]  [-f,--follow] [-d,--duplicates-removed]
       [-V,--version] [-h,--help] pid [fd] [fd] ...

DESCRIPTION
       peekfd attaches to a running process and intercepts all reads and writes to file  descrip-
       tors.  You can specify the desired file descriptor numbers or dump all of them.

OPTIONS
       -8     Do no post-processing on the bytes being read or written.

       -n     Do not display headers indicating the source of the bytes dumped.

       -c     Also  dump  the  requested file descriptor activity in any new child processes that
	      are created.

       -d     Remove duplicate read/writes from the output.  If you're	looking  at  a	tty  with
	      echo, you might want this.

       -v     Display a version string.

       -h     Display a help message.

FILES
       /proc/*/fd
	      Not used but useful for the user to look at to get good file descriptor numbers.

ENVIRONMENT
       None.

DIAGNOSTICS
       The following diagnostics may be issued on stderr:

       Error attaching to pid ...
	      An  unknown  error occured while attempted to attach to a process.. you may need to
	      be root.

BUGS
       Probably lots.  Don't be surprised if the process you are monitoring dies.

AUTHOR
       Trent Waddington <trent.waddington@gmail.com>

SEE ALSO
       ttysnoop(8)

Linux					    APRIL 2007					PEEKFD(1)
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