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.
CONFIG_BPF and bpftrace.
- Trace bash commands system wide:
A timestamp on the output, in "HH:MM:SS" format.
The process ID for bash.
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 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.
Unstable - in development.