NAME

intro − introduction to system calls

HP-UX COMPATIBILITY

Level: This entry describes where in the HP-UX compatibility model this capability appears. 

Origin:
The system or systems from which this facility is derived.

DESCRIPTION

This section describes all of the system calls.  All of these calls return a function result.  This result indicates the status of the call.  Typically, a zero or positive result indicates that the call completed successfully, and −1 indicates an error.  The individual descriptions specify the details.  An error number is also made available in the external variable errno (see errno(2)).  Errno is not cleared on successful calls, so it should be tested only after an error has been indicated. 

The descriptions of the facilities in this section depend on the definitions of several terms.  See glossary(9) for precise definitions.

HARDWARE DEPENDENCIES

Series 500:
A second error indicator, errinfo, is implemented in addition to errno.  See errinfo(2). 

SEE ALSO

intro(3), glossary(9). 

Hewlett-Packard  —  last mod. May 11, 2021