uname (BPX1UNA, BPX4UNA) — Obtain the name of the current operating system

Function

The uname callable service obtains information about the z/OS UNIX system the caller is running on.

Requirements

Operation	Environment
Authorization:	Supervisor or problem state, any PSW key
Dispatchable unit mode:	Task
Cross memory mode:	PASN = HASN
AMODE (BPX1UNA):	31-bit
AMODE (BPX4UNA):	64-bit
ASC mode:	Primary mode
Interrupt status:	Enabled for interrupts
Locks:	Unlocked
Control parameters:	All parameters must be addressable by the caller and in the primary address space.

Format

CALL BPX1UNA,(Data_area_length,
              Data_area_address,
              Return_value,
              Return_code,
              Reason_code)

AMODE 64 callers use BPX4UNA with the same parameters. The Data_area_address parameter is a doubleword.

Parameters

Data_area_length

Supplied parameter

Type:: Integer
Length:: Fullword

The name of a fullword that contains the length of the data area that is pointed to by Data_area_address. The area must be at least the length of UTSN#LENGTH. For a mapping of this data area, refer to BPXYUTSN — Map the response structure for uname.

Data_area_address

Returned parameter

Type:: Address
Length:: Fullword (doubleword)

The name of a fullword (doubleword) that contains the address of the area in which the system information is to be returned. For a mapping of this data area, refer to BPXYUTSN — Map the response structure for uname.

Return_value

Returned parameter

Type:: Integer
Length:: Fullword

The name of a fullword in which the uname service returns a nonnegative value if the request is successful, or -1 if it is not successful.

Return_code

Returned parameter

Type:: Integer
Length:: Fullword

The name of a fullword in which the uname service stores the return code. The uname service returns Return_code only if Return_value is -1. See z/OS UNIX System Services Messages and Codes for a complete list of possible return code values. The uname service can return one of the following values in the Return_code parameter:

Return_code	Explanation
EFAULT	The pointer to the UTSN from the invoker is bad. The following reason code can accompany the return code: JRBadAddress.
EINVAL	The passed length of the invoker UTSN is not valid. The following reason code can accompany the return code: JROK.

Reason_code

Returned parameter

Type:: Integer
Length:: Fullword

The name of a fullword in which the uname service stores the reason code. The uname service returns Reason_code only if Return_value is -1. Reason_code further qualifies the Return_code value. For the reason codes, see z/OS UNIX System Services Messages and Codes.

Characteristics and restrictions

There are no restrictions on the use of the uname service.

Examples

For an example using this callable service, see BPX1UNA (uname) example.