The tcgetpgrp callable service gets the process group ID of the foreground process group that is associated with a terminal, which is identified by its file descriptor.
Operation | Environment |
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Authorization: | Supervisor or problem state, any PSW key |
Dispatchable unit mode: | Task |
Cross memory mode: | PASN = HASN |
AMODE (BPX1TGP): | 31-bit |
AMODE (BPX4TGP): | 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. |
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AMODE 64 callers use BPX4TGP with the same parameters.
The name of a fullword that contains the file descriptor for the terminal.
The name of a fullword in which the tcgetpgrp service returns the process group ID of the foreground process group that is associated with the terminal, if the request is successful; or -1, if it is not successful. If there is no foreground process group, a positive value, not equal to any existing process group, is returned.
Return_code | Explanation |
---|---|
EBADF | The File_descriptor parameter does not specify a valid open file descriptor. |
ENOTTY | The file descriptor is not associated with a terminal. |
The name of a fullword in which the tcgetpgrp service stores the reason code. The tcgetpgrp 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.
There are no restrictions on the use of the tcgetpgrp service.
For an example using this callable service, see BPX1TGP (tcgetpgrp) example.