NAME

sofdsnoop - Trace FDs passed through unix sockets. Uses Linux eBPF/bcc.

SYNOPSIS

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

DESCRIPTION

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.

AUTHOR

Jiri Olsa