libcups 3.0.0

Author: michaelrsweet

_posts/2026-01-08-libcups-3.0.0.md

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+---
+title: libcups v3.0.0
+layout: single
+author: Mike
+excerpt: libcups v3.0.0 is the first stable release of the CUPS v3 library and tools which remove deprecated APIs, add new APIs, and normalize existing APIs.
+---
+
+libcups v3.0.0 is the first stable release of the CUPS v3 library and tools which remove deprecated APIs, add new APIs, and normalize existing APIs.  Changes include:
+
+- Added `cupsLangIsRTL` API.
+- Added `cupsOAuthGetDeviceGrant`, `cupsOAuthGetJWKS`, and `cupsOAuthGetUserId` APIs.
+- Added `httpGetCookieValue` and `httpGetSecurity` APIs.
+- Added an "install" sub-command to the `cups-x509` command.
+- Added a "--user-agent" option to the `ipptool` command.
+- Updated documentation (Issue #113)
+- Updated the `cupsOAuth` APIs to support sharing of some OAuth values between the system (root) and per-user cache values.
+- Updated the `cupsJWTNew` API to accept an optional JSON claims object.
+- Updated the `httpSetCookie` API to support multiple "Set-Cookie:" header values.
+- Updated `ippfind` to use the `cupsGetClock` API.
+- Updated `ippeveprinter` to include all ready and supported attributes and values in the environment when processing a job.
+- Fixed `ipptransform` media handling to preserve input document dimensions when "media" or "media-col" are not specified (Issue #102)
+- Fixed `cupsJSONExport` functions with empty arrays or objects.
+- Fixed `httpGetDateTime` for dates in the far future (Issue #124)
+- Fixed input checks for `cupsCreateCredentials` and `cupsCreateCredentialsRequest` APIs (Issue #125)
+- Fixed return values of `ippDateToTime` when the timezone isn't GMT.
+- Fixed a potential timing issue with `cupsEnumDests`.
+- Fixed a bug in the Avahi implementation of `cupsDNSSDBrowseNew`.
+- Fixed a memory leak in `httpClose`.
+- Fixed some Coverity-detected issues.
+- Fixed support for device authorization grants.
+
+Enjoy!
+
+* <a href="https://github.com/OpenPrinting/libcups/releases/tag/v3.0.0" itemprop="sameAs" rel="nofollow noopener noreferrer"><i class="fas fa-fw fa-download" aria-hidden="true"></i>Download v3.0.0</a>