Open System Services System Calls Reference Manual (G06.25+, H06.03+)

System Functions (f - i) ioctl(2)
[ENOTSUP] The request parameter specifies an operation that is not supported on the device
specified by the filedes parameter.
[ENOTTY] The device parameter is not associated with a character-special device, or the
specified request does not apply to the type of object that descriptor device refer-
ences.
[ENXIO] No such device or address exists.
[EOPNOTSUPP]
Operation not supported on socket. The type of socket (address family or proto-
col) does not support the requested operation.
[EWRONGID] One of these conditions occurred:
• The process attempted an input or output operation on an input/output
process (such as a terminal server process) that has failed or is in the
down state.
• The processor for the disk process of the specified file failed during an
input or output operation, and takeover by the backup process occurred.
• The open file descriptor has migrated to a new processor, but the new
processor lacks a resource or system process needed for using the file
descriptor.
The file descriptor specified by the filedes parameter can only be closed.
For all other error conditions, errno is set to the appropriate Guardian file-system error number.
See the Guardian Procedure Errors and Messages Manual for more information about a specific
Guardian file-system error.
RELATED INFORMATION
Files: tty(7).
STANDARDS CONFORMANCE
The OSS version of this function does not conform to a published standard.
HP extensions to the XPG4 Version 2 specification are:
• The errno values [EFAULT], [ENETDOWN], [ENOTSUP], [ENXIO], [EOPNOTSUPP],
and [EWRONGID] can be returned.
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