On Tue, 28 Jun 2022 14:42:45 -0700, Charles Mills wrote:
>I am still not quite understanding the usage of Rexx variables with SYSCALL.
>
>If myFileName = "/u/myfile" then do I want to code
>
>"SYSCALL open myFileName" or "SYSCALL open" myFileName ?
>
address SYSCALL "open" myFileName /* Rexx evaluates myFileName. */
>In other words, does myFileName get passed by value, or does SYSCALL do an
>IRXEXCOM to find its value from its name?
>
Not really.
say myFileName /* Rexx evaluates. */
>Ditto for SYSCALL write. The example on
>https://www.ibm.com/docs/en/zos/2.1.0?topic=scd-write shows
>
>"write" fd "buf"
>
>Which makes no sense to me at all. fd is passed by value but "buf" by name?
>
Both by value.
string = "Hello world"ESC_N
address SYSCALL "write 1 (string)"
Specifying a syscall command
Specifying strings
A variable name enclosed in parentheses.
Strings that contain both the single quotation mark and
double quotation mark characters must be stored in a variable,
and you must use the variable name.
--
gil
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