HP-UX Reference (11i v2 07/12) - 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 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)). Note that

errno is not cleared on successful

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