Linux cli command peekfd

➡ A Linux man page (short for manual page) is a form of software documentation found on Linux and Unix-like operating systems. This man-page explains the command peekfd and provides detailed information about the command peekfd, system calls, library functions, and other aspects of the system, including usage, options, and examples of _. You can access this man page by typing man followed by the peekfd.

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NAME 🖥️ peekfd 🖥️

peek at file descriptors of running processes

SYNOPSIS

peekfd [-8,–eight-bit-clean] [-n,–no-headers] [-c,–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.

BUGS

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

AUTHOR

Trent Waddington

SEE ALSO

ttysnoop(8)

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