IBM MAINFRAME: Rexx not equals operator.
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And, of course, you can also write a REXX program to copy empty files. The DETACH command. The DETACH command writes the message with the process ID of the detached program to STDERR. To catch this ID, you can redirect STDERR of the DETACH command into a file (see Redirect STDOUT and STDERR). Than you can use any program that can read open files to process this file. Unfortunately REXX.
If script is not specified, the Rexx program to interpret will be read from standard input, and interpretation will start when the whole program has been read. If '-' is specified as script then the script will be read from standard input. The regina executable supports the use of external function packages written to the SAA API, and called with the rxfuncadd BIF. The rexx executable does not.
REXX is similar to the C language in that it has a small number of instructions, but a large number of functions (and users can write their own functions). A description of the most important instructions are described on the following pages. Instructions are not case-sensitive: they can be specified all in uppercase, all in lowercase, or any combination thereof.
It is possible to write REXX programs consisting of thousands of clauses with each one on a separate line and without using a single semicolon. So, the end of a line normally means the end of a clause as well. However, most REXX implementations place a limit on the length of a single line. Most editors or word processors used to write programs do, too. And for readability (always a very.
Built-in Functions. Rexx provides a set of built-in functions, including character manipulation, conversion, and information functions. The following are general notes on the built-in functions: The parentheses in a function are always needed, even if no arguments are required. The first parenthesis must follow the name of the function with no.
The REXX exec returns with a return code of 0 when it successfully issues the REPLY command, a return code of 4 when the console is not a primary EMCS console, a return code of 8 when the expected message is not found in the command responses, a return code of 12 when there is no outstanding reply, a return code of 16 when the reply is not issued with a primary EMCS console, a return code of.