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Subsystem for UNIX-based Applications

Updated: November 14, 2007

Applies To: Windows Server 2008

Subsystem for UNIX-based Applications (SUA) is a source-compatibility subsystem for compiling and running custom UNIX-based applications on a computer running a Microsoft® Windows® server-class operating system. You can make your UNIX applications fully interoperable with Windows in SUA with little or no change to your original source code.

Hierarchy of Managed Entities

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Managed Entities

Name Description

Subsystem for UNIX-based Applications -- Psxss utility

Subsystem for UNIX-based Applications (SUA) processes, including network-related send and receive processes, are handled by psxss.exe.

Subsystem for UNIX-based Applications -- Psxrun utility

Subsystem for UNIX-based Applications (SUA) uses the psxrun command-line utility to start an SUA process without the need for a controlling terminal. The program psxrun.exe is a Win32 application that queues POSIX processes that must access the Windows Service Control Manager.

When you use either the Windows Services utility or the Subsystem for UNIX-based Applications service utility to terminate a service, the program psxrun.exe sends a SIGTERM signal to the service.

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