CUPS

CUPS is a standards-based, open source printing system developed by Apple Inc. for macOS® and other UNIX®-like operating systems. CUPS uses the Internet Printing Protocol ("IPP") and provides System V and Berkeley command-line interfaces, a web interface, and a C API to manage printers and print jobs. It supports printing to both local (parallel, serial, USB) and networked printers, and printers can be shared from one computer to another, even over the Internet!

Internally, CUPS uses PostScript Printer Description ("PPD") files to describe printer capabilities and features and a wide variety of generic and device- specific programs to convert and print many types of files. Sample drivers are included with CUPS to support many Dymo, EPSON, HP, Intellitech, OKIDATA, and Zebra printers. Many more drivers are available online and (in some cases) on the driver CD-ROM that came with your printer.

CUPS is licensed under the Apache License Version 2.0. See the file "LICENSE" for more information.

It is a bug fix release that addresses issues in the scheduler, IPP Everywhere support, CUPS library, and USB printer support.

Changes include:

• Running ppdmerge with the same input and output filenames did not work as advertised
• Fixed a potential memory leak when reading at the end of a file
• Fixed potential unaligned accesses in the string pool
• Fixed a potential memory leak when loading a PPD file
• Added a USB quirks rule for the Lexmark E120n
• Updated the USB quirks rule for Zebra label printers
• Fixed a compile error on Linux
• The lpadmin command, web interface, and scheduler all queried an IPP Everywhere printer differently, resulting in different PPDs for the same printer
• Fixed an issue with the self-signed certificates generated by GNU TLS
• The ippValidateAttribute function did not catch all instances of invalid UTF-8 strings
• Non-Kerberized printing to Windows via IPP was broken
• The scheduler no longer stops a printer if an error occurs when a job is canceled or aborted
• Added a USB quirks rule for the DYMO 450 Turbo
• Added a USB quirks rule for Xerox printers
• The scheduler's self-signed certificate did not include all of the alternate names for the server when using GNU TLS
• Fixed compiler warnings with newer versions of GCC
• Fixed some PPD caching and IPP Everywhere PPD accounting/password bugs
• Fixed PreserveJobHistory bug with time values
• Media size matching now uses a tolerance of 0.5mm
• The lpadmin command would hang with a bad PPD file
• Fixed a potential crash bug in cups-driverd
• Fixed a performance regression with large PPDs
• The scheduler did not always idle exit as quickly as it could