1bashreadline(8) System Manager's Manual bashreadline(8)
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6 bashreadline - Print entered bash commands system wide. Uses Linux
7 eBPF/bcc.
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10 bashreadline [-h] [-s SHARED]
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13 bashreadline traces the return of the readline() function using
14 uprobes, to show the bash commands that were entered interactively,
15 system wide. The entered command may fail: this is just showing what
16 was entered.
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18 This program is also a basic example of eBPF/bcc and uprobes.
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20 This makes use of a Linux 4.4 feature (bpf_perf_event_output()); for
21 kernels older than 4.4, see the version under tools/old, which uses an
22 older mechanism
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24 Since this uses BPF, only the root user can use this tool.
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27 CONFIG_BPF and bcc.
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30 -h Print usage message.
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32 -s Specify the location of libreadline.so shared library when you
33 failed to run the script directly with error: "Exception: could
34 not determine address of symbol ´readline´". Default value is
35 /lib/libreadline.so.
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38 Trace bash commands system wide:
39 # bashreadline
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42 TIME Time of the command (HH:MM:SS).
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44 PID Process ID of the bash shell.
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46 COMMAND
47 Entered command.
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50 As the rate of interactive bash commands is expected to be very low
51 (<<100/s), the overhead of this program is expected to be negligible.
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54 This is from bcc.
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56 https://github.com/iovisor/bcc
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58 Also look in the bcc distribution for a companion _examples.txt file
59 containing example usage, output, and commentary for this tool.
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62 Linux
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65 Unstable - in development.
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68 Brendan Gregg
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71 opensnoop(8)
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75USER COMMANDS 2016-01-28 bashreadline(8)