| Server IP : 15.235.198.142 / Your IP : 216.73.216.190 Web Server : Apache/2.4.58 (Ubuntu) System : Linux ballsack 6.8.0-45-generic #45-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 30 12:02:04 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 8.3.6 Disable Function : NONE MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : OFF Directory : /usr/share/doc/bpftrace/examples/ |
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Demonstrations of statsnoop, the Linux bpftrace/eBPF version. statsnoop traces different stat() syscalls system-wide, and prints details. Example output: # ./statsnoop.bt Attaching 9 probes... Tracing stat syscalls... Hit Ctrl-C to end. PID COMM ERR PATH 27835 bash 0 . 27835 bash 2 /usr/local/sbin/iconfig 27835 bash 2 /usr/local/bin/iconfig 27835 bash 2 /usr/sbin/iconfig 27835 bash 2 /usr/bin/iconfig 27835 bash 2 /sbin/iconfig 27835 bash 2 /bin/iconfig 27835 bash 2 /usr/games/iconfig 27835 bash 2 /usr/local/games/iconfig 27835 bash 2 /snap/bin/iconfig 27835 bash 2 /apps/python/bin/iconfig 30573 command-not-fou 2 /usr/bin/Modules/Setup 30573 command-not-fou 2 /usr/bin/lib/python3.5/os.py 30573 command-not-fou 2 /usr/bin/lib/python3.5/os.pyc 30573 command-not-fou 0 /usr/lib/python3.5/os.py 30573 command-not-fou 2 /usr/bin/pybuilddir.txt 30573 command-not-fou 2 /usr/bin/lib/python3.5/lib-dynload 30573 command-not-fou 0 /usr/lib/python3.5/lib-dynload 30573 command-not-fou 2 /usr/lib/python35.zip 30573 command-not-fou 0 /usr/lib 30573 command-not-fou 2 /usr/lib/python35.zip 30573 command-not-fou 0 /usr/lib/python3.5/ 30573 command-not-fou 0 /usr/lib/python3.5/ 30573 command-not-fou 0 /usr/lib/python3.5/ 30573 command-not-fou 2 /usr/lib/python3.5/encodings/__init__.cpython-35m-x86_64-linux- 30573 command-not-fou 2 /usr/lib/python3.5/encodings/__init__.abi3.so 30573 command-not-fou 2 /usr/lib/python3.5/encodings/__init__.so 30573 command-not-fou 0 /usr/lib/python3.5/encodings/__init__.py 30573 command-not-fou 0 /usr/lib/python3.5/encodings/__init__.py This output has caught me mistyping a command in another shell, "iconfig" instead of "ifconfig". The first several lines show the bash shell searching the $PATH (why is games in my $PATH??), and failing to find it (ERR == 2 is file not found). Then, a "command-not-found" program executes (the name is truncated to 16 characters in the COMM field, including the NULL), which begins the process of searching for and suggesting a package. ie, this: # iconfig The program 'iconfig' is currently not installed. You can install it by typing: apt install ipmiutil statsnoop can be used for general debugging, to see what file information has been requested, and whether those files exist. It can be used as a companion to opensnoop, which shows what files were actually opened. There is another version of this tool in bcc: https://github.com/iovisor/bcc The bcc version provides options to customize the output.