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

System Functions (f - i) getpriority(2)
[ENOTOSS] The calling process is not an OSS process. The requested operation is not sup-
ported from the Guardian environment.
[ESRCH] No process was located using the which and who parameter values specified.
RELATED INFORMATION
Functions: nice(2).
STANDARDS CONFORMANCE
The following is an HP extension to the XPG4 Version 2 specification:
The function can return the errno value [ENOTOSS].
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