peekfd (1) Linux Manual Page
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 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 <PID>
- An unknown error occurred while attempted to attach to a process, you may need to be root.