spfdsnoop-bpfcc(8)

Usage

sofdsnoop [-h] [-T] [-p PID] [-t TID] [-n NAME] [-d DURATION]

Overview

sofdsnoop traces FDs passed through unix sockets

Every file descriptor that is passed via unix sockets os displayed on separate line together with process info (TID/COMM columns), ACTION details (SEND/RECV), file descriptor number (FD) and its translation to file if available (NAME).

Since this uses BPF, only the root user can use this tool.

Requirements

CONFIG_BPF and bcc.

Options

-h: Print usage message.

-T: Include a timestamp column.

-p PID: Trace this process ID only (filtered in-kernel).

-t TID: Trace this thread ID only (filtered in-kernel).

-d DURATION: Total duration of trace in seconds.

-n NAME: Only print command lines matching this command name (regex)

Examples

Trace all sockets:: # sofdsnoop

Trace all sockets, and include timestamps:: # sofdsnoop -T

Only trace sockets where the process contains "server":: # sofdsnoop -n server

Fields

TIME(s): Time of SEDN/RECV actions, in seconds.

ACTION: Operation on the fd SEND/RECV.

TID: Process TID

COMM: Parent process/command name.

SOCKET: The socket carrier.

FD: file descriptor number

NAME: file name for SEND lines

Source

This is from bcc.

: https://github.com/iovisor/bcc

Also look in the bcc distribution for a companion _examples.txt file containing example usage, output, and commentary for this tool.

OS

Linux

Stability

Unstable - in development.