z/OS Using REXX and z/OS UNIX System Services
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isatty

z/OS Using REXX and z/OS UNIX System Services
SA23-2283-00 

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>>-isatty--fd--------------------------------------------------><

Function

isatty invokes the isatty callable service to determine if a file is a terminal.

Parameters

fd
The file descriptor (a number) for the file.

Usage notes

Upon return, RETVAL contains either 0 (not a tty) or 1 (a tty).

Example

To test if file descriptor 0 is a terminal: 
"isatty 0"
Parent topic: Syscall command descriptions

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