peekfd - peek at file descriptors of running processes

       Trent Waddington

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

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.

       The following diagnostics may be issued on stderr:

       Errorattachingtopid<PID>
              An unknown error occurred while attempted to attach to a process, you may need to be root.

       None.

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

       peekfd - peek at file descriptors of running processes

       -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.

ttysnoop(8)

psmisc                                             2021-12-01                                          PEEKFD(1)

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