NAME¶

undump.bt - Catch UNIX domain socket packages. Uses bpftrace/eBPF.

SYNOPSIS¶

undump.bt

DESCRIPTION¶

undump.bt tracked reception of UNIX domain sockets.

This program is also a basic example of bpftrace and kprobes.

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

REQUIREMENTS¶

CONFIG_BPF and bpftrace.

EXAMPLES¶

Trace reception of UNIX domain sockets:

# undump.bt

FIELDS¶

TIME

A timestamp on the output, in "HH:MM:SS" format.

COMM

The process COMM.

PID

The process ID.

SIZE

The size of the received packet, in bytes.

DATA

Display received packets in hex or string.

OVERHEAD¶

The overhead of this program mainly comes from the data packets received by the terminal output.

SOURCE¶

This is from bpftrace.

https://github.com/bpftrace/bpftrace

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

This is a bpftrace version of the bcc examples/tracing of the same name. The bcc tool may provide more options and customizations.

https://github.com/iovisor/bcc

OS¶

Linux

STABILITY¶

Unstable - in development.

AUTHOR¶

Rong Tao

SEE ALSO¶

opensnoop.bt(8)