## NAME

peekfd - peek at file descriptors of running processes

## SYNOPSIS

peekfd

pid

...

## DESCRIPTION

peekfd attaches to a running process and intercepts all reads and writes to file descriptors. 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

## SEE ALSO

ttysnoop (8)