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Introduction to the SAS/C Library |
ISO/ANSI C Standards |
Traditional UNIX Support |
The SAS/C library supports a number of functions defined by traditional
(pre-POSIX) UNIX systems. In some cases, these functions are limited to use
with the UNIX System Services (USS) OS/390 operating system, an International
Business Machines Corporation Product. However, in many cases, these functions
have been defined so that they are meaningful in native OS/390 and CMS environments.
For instance, although the
stat
and
link
functions are limited to use with USS files,
other functions such as
open
,
read
,
write
, and
access
can be used with most OS/390 and CMS file types.
Although SAS/C does not and cannot support every function
defined by every historical UNIX variant, the library does attempt to offer
support for a large subset of the core UNIX functionality, especially functions
frequently used in portable programs. Note, however, that some core functions,
such as
fork
and
kill
, cannot be implemented under OS/390 or CMS by an application-level
library such as the SAS/C library without operating system support (such as
USS OS/390).
POSIX Standards |
Using the underlying functionality of the OS/390 support for USS, SAS/C, Release 6.00 enables you to
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Copyright © 2001 by SAS Institute Inc., Cary, NC, USA. All rights reserved.