HP-UX Reference (11i v2 04/09) - 2 System Calls (vol 5)

intro(2) intro(2)

NAME

intro - introduction to system calls

DESCRIPTION

This section describes all of the system calls. All of these calls return a function result. This result indi-

cates the status of the call. Typically, a zero or positive result indicates that the call completed success-

fully, 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)). Note:

errno is not cleared on success-

ful calls. Therefore, it should be tested only after an error has been indicated.