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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 occurred 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)

psmisc                                      2012-07-28                                  PEEKFD(1)

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