Open System Services System Calls Reference Manual (G06.29+, H06.08+, J06.03+)

System Functions (w) waitpid(2)
• In addition to the status information mandated by the POSIX.1 standard, the HP imple-
mentation also returns status information for processes that terminate as a result of Guar-
dian procedure calls. In addition, status is returned for processes that terminate abnor-
mally as a result of a situation that is unique to HP NonStop server architecture, such as
failure of the child process’s processor while the parent process continues to execute.
• The POSIX.1 standard indicates that the value in the location pointed to by the
status_location parameter is undefined when errno returns the value [EINTR]. HP’s
implementation also does not return meaningful information, and the value should not be
used for further processing.
This function is an extension to the XPG4 Version 2 specification.
The use of this function with the POSIX User Thread Model library conforms to the following
industry standards:
• IEEE Std 1003.1-2004, POSIX System Application Program Interface
This function does not conform to the async-signal safe requirement of the POSIX.1 standard.
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