<Chuckle> REXX isn't so simple after all! You would have been better off
writing your code in Java, or if you have installed the new Open XL
C/C++ compiler/runtime you could use the C++17 filesystem library.
To me, just having to check return codes instead of relying on
exceptions is a good enough reason to dodge REXX.
On 29/06/2022 6:32 am, Charles Mills wrote:
I think that for write you pass the buffer by name, not its Rexx value. Believe
it or not.
That is what the example in the manual shows, and that is what is working in my
code:
"write" Filefd "Record" Length(Record)
Is writing the contents of Record, not the literal "Record". Definitely
counterintuitive. Definitely astonishing.
Maybe (Record) would work. I have not tried, and that is not what the examples
show.
Charles
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Paul Gilmartin
Sent: Tuesday, June 28, 2022 3:01 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Some questions on SYSCALL
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.
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