bashreadline - Man Page
Print bash commands system wide. Uses bpftrace/eBPF.
Synopsis
bashreadline.bt
Description
bashreadline traces the return of the readline() function using uretprobes, 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 bpftrace and uretprobes.
Since this uses BPF, only the root user can use this tool.
Requirements
CONFIG_BPF and bpftrace.
Examples
- Trace bash commands system wide:
# bashreadline.bt
Fields
- TIME
A timestamp on the output, in "HH:MM:SS" format.
- PID
The process ID for bash.
- COMMAND
Entered command.
Overhead
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.
Source
This is from bpftrace.
https://github.com/iovisor/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 tool of the same name. The bcc tool may provide more options and customizations.
OS
Linux
Stability
Unstable - in development.
Author
Brendan Gregg