Provided by: psmisc_22.21-2.1build1_amd64
peekfd - peek at file descriptors of running processes
peekfd [-8,--eight-bit-clean] [-n,--no-headers] [-f,--follow] [-d,--duplicates-removed] [-V,--version] [-h,--help] pid [fd] [fd] ...
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.
-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.
/proc/*/fd Not used but useful for the user to look at to get good file descriptor numbers.
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.
Probably lots. Don't be surprised if the process you are monitoring dies.
Trent Waddington ⟨email@example.com⟩