🚀 go-pugleaf

(I posted this to C370-L.  ASM370 readers should see it too.)

On Tue, 10 Mar 1992 18:01:09 GMT "Mark R. Ludwig"
<mrl%UAI.COM@ncsuvm.cc.ncsu.edu> wrote:

>I am looking for an easier way to interact with a TSO user from a
>program than using the PUTLINE, GETLINE, PUTGET, TPUT, TGET, or TPG
>MACROs which IBM supplies.  My requirement is to be able to issue a
>prompt on a line and have the user enter the response on the same
>line.  Does the C environment support the Unix semantics, such that I
>could have code like:
>
>        printf("...");  /* No \n at the end of the string */
>        gets(...);
>
>to do what I want?  Note that the program is fundamentally
>interactive, and there's no way for me to have a CLIST run "before"
>the program to get the information.  The program must be able to
>interact directly with the user.  Thanks in advance.$$

You can do this as follows:

(1) Use PUTLINE or TPUT with the ASIS option.  Its main effect is to
    suppress the carriage return at the end of a line.  That's what
    the CLIST statement WRITENR does.

(2) Use printf() from C without a \n, as you suggest.  This works with
    the MVS PTF that corresponds to VM PTF UL66364 (APAR PL54700) for
    V1R2 - I think the fix has been incorporated into V2, but I'm not
    sure. (I can't find the PTF number on MVS that fixes this.)
    I do know that it works properly on my system.

(3) *** NEVER, NEVER, NEVER *** use gets()!  Use fgets() specifying
    stdin instead.  Or else your user will clobber your data area
    whenever (s)he types more than you expect...

hope(this) { helps; }

   - SEB