NAME

       bashreadline - Print entered bash commands system wide. Uses Linux eBPF/bcc.

SYNOPSIS

       bashreadline [-h] [-s SHARED]

DESCRIPTION

       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.

REQUIREMENTS

       CONFIG_BPF and bcc.

OPTIONS

       -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.

EXAMPLES

       Trace bash commands system wide:
              # bashreadline

FIELDS

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

       PID    Process ID of the bash shell.

       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 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

       Brendan Gregg

SEE ALSO

       opensnoop(8)