Manual: statsnoop.bt

statsnoop.bt(8)					   System Manager's Manual				     statsnoop.bt(8)

NAME
       statsnoop.bt - Trace stat() syscalls. Uses bpftrace/eBPF.

SYNOPSIS
       statsnoop.bt

DESCRIPTION
       statsnoop  traces  the stat() syscall, showing which processes are attempting to stat which files. This can be useful
       for determining the location of config and log files, or for troubleshooting applications that are failing, specially
       on startup.

       This traces the tracepoints for statfs(), statx(),  newstat(),  and  newlstat().	 These	aren't	the  only  the	stat
       syscalls: if you are missing activity, you may need to add more variants.

       Since this uses BPF, only the root user can use this tool.

REQUIREMENTS
       CONFIG_BPF and bcc.

EXAMPLES
       Trace all stat() syscalls:
	      # statsnoop.bt

FIELDS
       PID Process ID

       COMM   Process name

       ERR    Error number (see the system's errno.h)

       PATH   Stat path

OVERHEAD
       This  traces  the  stat tracepoints and prints output for each event. As the rate of this is generally expected to be
       low (< 1000/s), the overhead is also expected to be negligible. If you have an application that	is  calling  a	high
       rate of stat()s, then test and understand overhead before use.

SOURCE
       This is from bpftrace.

	      https://github.com/bpftrace/bpftrace

       Also  look in the bpftrace distribution for a companion _examples.txt file containing example usage, output, and com‐
       mentary for this tool.

       This is a bpftrace version of the bcc tool of the same name. The bcc tool may provide  more  options  and  customiza‐
       tions.

	      https://github.com/iovisor/bcc

OS
       Linux

STABILITY
       Unstable - in development.

AUTHOR
       Brendan Gregg

SEE ALSO
       opensnoop.bt(8), execsnoop.bt(8)

USER COMMANDS						 2018-09-08					     statsnoop.bt(8)