bashreadline - Print entered bash commands system wide. Uses Linux eBPF/bcc. bashreadline [-h] [-s SHARED] bashreadline traces the return of the readline() function using uprobes, to show the bash commands that were entered interactively, system wide. The entered command may fail: this is just showing what was entered. This program is also a basic example of eBPF/bcc and uprobes. This makes use of a Linux 4.4 feature (bpf_perf_event_output()); for kernels older than 4.4, see the version under tools/old, which uses an older mechanism Since this uses BPF, only the root user can use this tool. CONFIG_BPF and bcc.

-h Print usage message.

-s Specify the location of libreadline.so shared library when you failed to run the script directly with error: "Exception: could not determine address of symbol \'readline\'". Default value is /lib/libreadline.so.

Trace bash commands system wide: # bashreadline

TIME Time of the command (HH:MM:SS).

PID Process ID of the bash shell.

COMMAND Entered command.

As the rate of interactive bash commands is expected to be very low (<<100/s), the overhead of this program is expected to be negligible. 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.

Linux Unstable - in development. Brendan Gregg opensnoop(8)