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---
layout: "docs"
page_title: "Vault Agent Auto-Auth File Sink"
New Docs Website (#5535)
* conversion stage 1
* correct image paths
* add sidebar title to frontmatter
* docs/concepts and docs/internals
* configuration docs and multi-level nav corrections
* commands docs, index file corrections, small item nav correction
* secrets converted
* auth
* add enterprise and agent docs
* add extra dividers
* secret section, wip
* correct sidebar nav title in front matter for apu section, start working on api items
* auth and backend, a couple directory structure fixes
* remove old docs
* intro side nav converted
* reset sidebar styles, add hashi-global-styles
* basic styling for nav sidebar
* folder collapse functionality
* patch up border length on last list item
* wip restructure for content component
* taking middleman hacking to the extreme, but its working
* small css fix
* add new mega nav
* fix a small mistake from the rebase
* fix a content resolution issue with middleman
* title a couple missing docs pages
* update deps, remove temporary markup
* community page
* footer to layout, community page css adjustments
* wip downloads page
* deps updated, downloads page ready
* fix community page
* homepage progress
* add components, adjust spacing
* docs and api landing pages
* a bunch of fixes, add docs and api landing pages
* update deps, add deploy scripts
* add readme note
* update deploy command
* overview page, index title
* Update doc fields
Note this still requires the link fields to be populated -- this is solely related to copy on the description fields
* Update api_basic_categories.yml
Updated API category descriptions. Like the document descriptions you'll still need to update the link headers to the proper target pages.
* Add bottom hero, adjust CSS, responsive friendly
* Add mega nav title
* homepage adjustments, asset boosts
* small fixes
* docs page styling fixes
* meganav title
* some category link corrections
* Update API categories page
updated to reflect the second level headings for api categories
* Update docs_detailed_categories.yml
Updated to represent the existing docs structure
* Update docs_detailed_categories.yml
* docs page data fix, extra operator page remove
* api data fix
* fix makefile
* update deps, add product subnav to docs and api landing pages
* Rearrange non-hands-on guides to _docs_
Since there is no place for these on learn.hashicorp, we'll put them
under _docs_.
* WIP Redirects for guides to docs
* content and component updates
* font weight hotfix, redirects
* fix guides and intro sidenavs
* fix some redirects
* small style tweaks
* Redirects to learn and internally to docs
* Remove redirect to `/vault`
* Remove `.html` from destination on redirects
* fix incorrect index redirect
* final touchups
* address feedback from michell for makefile and product downloads
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sidebar_title: "File"
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sidebar_current: "docs-agent-autoauth-sinks-file"
description: |-
File sink for Vault Agent Auto-Auth
---
# Vault Agent Auto-Auth File Sink
The `file` sink writes tokens, optionally response-wrapped and/or encrypted, to
a file. This may be a local file or a file mapped via some other process (NFS,
Gluster, CIFS, etc.).
Once the sink writes the file, it is up to the client to control lifecycle;
generally it is best for the client to remove the file as soon as it is seen.
It is also best practice to write the file to a ramdisk, ideally an encrypted
ramdisk, and use appropriate filesystem permissions. The file is currently
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written with `0640` permissions as default, but can be overridden with the optional
'mode' setting.
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## Configuration
- `path` `(string: required)` - The path to use to write the token file
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- `mode` `(int: optional)` - A string containing an octal number representing the bit pattern for the file mode, similar to chmod. Set to "0000" to prevent Vault from modifying the file mode
