sofdsnoop(8)

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

SEE ALSO
opensnoop(1)