Linux "peekfd" Command Line Options and Examples

peek at file descriptors of running processes

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..

Usage:

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

Command Line Options:

-8

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


                            peekfd -8 ...

-n

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


                            peekfd -n ...

-c

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


                            peekfd -c ...

-v

Display a version string.


                            peekfd -v ...

-h

FILES/proc/*/fdNot used but useful for the user to look at to get good file descriptor numbers.ENVIRONMENTNone.DIAGNOSTICSThe 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.BUGSProbably lots. Don't be surprised if the process you are monitoring dies.AUTHORTrent Waddington ⟨trent.waddington@gmail.com⟩


                            peekfd -h ...