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)