capable(8) | System Manager's Manual | capable(8) |
NAME¶
capable.bt - Trace security capability checks (cap_capable()).SYNOPSIS¶
capable.btDESCRIPTION¶
This traces security capability checks in the kernel, and prints details for each call. This can be useful for general debugging, and also security enforcement: determining a white list of capabilities an application needs.Since this uses BPF, only the root user can use this tool.
REQUIREMENTS¶
CONFIG_BPF, bpftrace.EXAMPLES¶
- Trace all capability checks system-wide:
- # capable.bt
FIELDS¶
- TIME(s)
- Time of capability check: HH:MM:SS.
- UID
- User ID.
- PID
- Process ID.
- COMM
- Process name. CAP Capability number. NAME Capability name. See capabilities(7) for descriptions.
- AUDIT
- Whether this was an audit event.
OVERHEAD¶
This adds low-overhead instrumentation to capability checks, which are expected to be low frequency, however, that depends on the application. Test in a lab environment before use.SOURCE¶
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 provides options to customize the output.
OS¶
LinuxSTABILITY¶
Unstable - in development.AUTHOR¶
Brendan GreggSEE ALSO¶
capabilities(7)2018-09-08 | USER COMMANDS |