---
name: "filebyproc.d"
section: "1m"
platform: "macos"
package: "dtrace"
version: "413"
release: "macOS 26.5"
platforms: ["macos"]
url: "https://new.carta.tech/filebyproc.d"
---

# filebyproc.d(1m)

snoop opens by process name. Uses DTrace.

## NAME

filebyproc.d - snoop opens by process name. Uses DTrace.

## SYNOPSIS

**filebyproc.d**

## DESCRIPTION

filebyproc.d is a DTrace OneLiner to print file pathnames as they are opened, including the name of the process calling the open. A line will be printed regardless of whether the open is actually successful or not.

This is useful to learn which files applications are attempting to open, such as config files, database files, log files, etc.

Docs/oneliners.txt and Docs/Examples/oneliners\_examples.txt in the DTraceToolkit contain this as a oneliner that can be cut-n-paste to run.

Since this uses DTrace, only users with root privileges can run this command.

## EXAMPLES

- This prints new process name and pathnames until Ctrl-C is hit.

  \#  **filebyproc.d**

## FIELDS

- CPU

  The CPU that recieved the event

- ID

  A DTrace probe ID for the event

- FUNCTION:NAME

  The DTrace probe name for the event

- remaining fields

  The first is the name of the process, the second is the file pathname.

## DOCUMENTATION

See the DTraceToolkit for further documentation under the  Docs directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output.

## EXIT

filebyproc.d will run forever until Ctrl-C is hit.

## AUTHOR

Brendan Gregg \[Sydney, Australia\]

## SEE ALSO

opensnoop(1M), dtrace(1M), [truss(1)](/truss/1.md)