Re: C Novice
Why not trying simple //OUTF DD SYSOUT=* ... That should go to SYSPRINT.
On Fri, Mar 6, 2009 at 9:29 PM, Lorne Dudley wrote:
> I'm a novice trying to get a simple C program running under MVS.
>
> I'm attempting to get file output to
> //OUTF DD SYSOUT=A
> with the following program.
>
> #include
> int main(void)
> {
> FILE *outf = NULL;
> printf("TESTFILE has been entered.\n");
> outf = fopen("dd:OUTF","recfm=fba, w+");
> if (!outf)
>{
>printf("fopen error on FILE *outf.\n");
>return 4;
>}
> fprintf(outf, "outf open ...\n");
> fclose(outf);
> return 0;
> }
>
> So far, with many variations to the fopen string, I get only the following
> output on SYSPRINT, no output to OUTF.
>
> TESTFILE has been entered.
> fopen error on FILE *outf.
>
> Can anyone give me some advice on how to code this correctly ?
>
> Regards
>
> Lorne Dudley
> Queen's University
> Kingston, Ontario
>
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Re: C Novice
I would suggest to avoid the MVS specific open mode strings
(that is, recfm, lrecl and so on) as often as possible, because,
if you use the simple "w" and "r" strings, the program will
probably run on every platform, which is not so in the other case.
My experience is that you don't need those MVS extensions most
of the time. One example where they are indeed needed is: if
you try to write a binary file with variable length (a VB file
with binary contents, not only text).
If you ever have questions about C on MVS, you could ask me offline
(15 years experience here).
Kind regards
Bernd
Am Samstag, 7. März 2009 06:35 schrieben Sie:
> Hi Bill !
>
> Thanks for all your assistance.
>
> outf = fopen("dd:OUTF","w");
> works for both the pre-assigned disk file and the SYSOUT=A .
>
> Regards
>
> Lorne
>
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Re: C Novice
Hi Bill !
Thanks for all your assistance.
outf = fopen("dd:OUTF","w");
works for both the pre-assigned disk file and the SYSOUT=A .
Regards
Lorne
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Re: C Novice
In the 2nd argument of fopen, the keyword parameters come after the mode.
Try it with just "w" or "w, recfm=fba".
Bill
On Fri, 6 Mar 2009 23:21:41 -0500, Lorne Dudley wrote:
>Hi Bill (or any other C programmer) !
>
>OK, perror("dd:OUTF"); gives me
>
>EDC5057I The open mode string was invalid. Explanation: The mode string
>passed to the fopen()/freopen() function was found to have invalid
>keywords, combinations, or characters. For example, if you are opening a
>ddname, be sure the DISP= specified on the DD statement is compatible
>with the open mode you specified. Programmer response: Correct the mode
>string and reissue the fopen()/freopen().
>
>I'm not much wiser with this explanation.
>
>I know that if I use only
>outf = fopen("dd:OUTF","w+");
>and
>//OUTF DD DISP=OLD,DSN=SYS2#.C.OUTF
>
>the program executes properly with zero return code.
>In this case the OUTF file is on disk with recfm=vb, lrecl=1028,
>blksize=6144.
>
>So I'm still in the dark as to how to get this to write to SYSOUT=A.
>
>Regards
>
>Lorne
>
>On Fri, 6 Mar 2009 21:29:17 -0500, Lorne Dudley wrote:
>
> > >I'm a novice trying to get a simple C program running under MVS.
> > >
> > >I'm attempting to get file output to
> > >//OUTF DD SYSOUT=A
> > >with the following program.
> > >
> > >#include
> > >int main(void)
> > >{
> > > FILE *outf = NULL;
> > > printf("TESTFILE has been entered.\n");
> > > outf = fopen("dd:OUTF","recfm=fba, w+");
> > > if (!outf)
> > > {
>
>perror("dd:OUTF");
>
> > > printf("fopen error on FILE *outf.\n");
> > > return 4;
> > > }
> > > fprintf(outf, "outf open ...\n");
> > > fclose(outf);
> > > return 0;
> > >}
> > >
> > >So far, with many variations to the fopen string, I get only the
> > >following output on SYSPRINT, no output to OUTF.
> > >
> > >TESTFILE has been entered.
> > >fopen error on FILE *outf.
> > >
> > >Can anyone give me some advice on how to code this correctly ?
> > >
>
>The "perror" function might give you more information about why fopen is
>failing. See above.
>
>Bill
>
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Re: C Novice
Hi Bill !
Through trial and error and the use of perror("dd:OUTF"); I have
determined that this syntax works as expected.
outf = fopen("dd:OUTF", "w");
Thanks for the lead.
Regards
Lorne
Bill Godfrey wrote:
On Fri, 6 Mar 2009 21:29:17 -0500, Lorne Dudley wrote:
I'm a novice trying to get a simple C program running under MVS.
I'm attempting to get file output to
//OUTF DD SYSOUT=A
with the following program.
#include
int main(void)
{
FILE *outf = NULL;
printf("TESTFILE has been entered.\n");
outf = fopen("dd:OUTF","recfm=fba, w+");
if (!outf)
{
perror("dd:OUTF");
printf("fopen error on FILE *outf.\n");
return 4;
}
fprintf(outf, "outf open ...\n");
fclose(outf);
return 0;
}
So far, with many variations to the fopen string, I get only the
following output on SYSPRINT, no output to OUTF.
TESTFILE has been entered.
fopen error on FILE *outf.
Can anyone give me some advice on how to code this correctly ?
The "perror" function might give you more information about why fopen is
failing. See above.
Bill
--
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send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO
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Re: C Novice
Hi Bill (or any other C programmer) !
OK, perror("dd:OUTF"); gives me
EDC5057I The open mode string was invalid. Explanation: The mode string
passed to the fopen()/freopen() function was found to have invalid
keywords, combinations, or characters. For example, if you are opening a
ddname, be sure the DISP= specified on the DD statement is compatible
with the open mode you specified. Programmer response: Correct the mode
string and reissue the fopen()/freopen().
I'm not much wiser with this explanation.
I know that if I use only
outf = fopen("dd:OUTF","w+");
and
//OUTF DD DISP=OLD,DSN=SYS2#.C.OUTF
the program executes properly with zero return code.
In this case the OUTF file is on disk with recfm=vb, lrecl=1028,
blksize=6144.
So I'm still in the dark as to how to get this to write to SYSOUT=A.
Regards
Lorne
On Fri, 6 Mar 2009 21:29:17 -0500, Lorne Dudley wrote:
> >I'm a novice trying to get a simple C program running under MVS.
> >
> >I'm attempting to get file output to
> >//OUTF DD SYSOUT=A
> >with the following program.
> >
> >#include
> >int main(void)
> >{
> > FILE *outf = NULL;
> > printf("TESTFILE has been entered.\n");
> > outf = fopen("dd:OUTF","recfm=fba, w+");
> > if (!outf)
> > {
perror("dd:OUTF");
> > printf("fopen error on FILE *outf.\n");
> > return 4;
> > }
> > fprintf(outf, "outf open ...\n");
> > fclose(outf);
> > return 0;
> >}
> >
> >So far, with many variations to the fopen string, I get only the
> >following output on SYSPRINT, no output to OUTF.
> >
> >TESTFILE has been entered.
> >fopen error on FILE *outf.
> >
> >Can anyone give me some advice on how to code this correctly ?
> >
The "perror" function might give you more information about why fopen is
failing. See above.
Bill
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Re: C Novice
Thanks for the hint Bill. That gives me dd:OUTF: EDC5057I The open mode string was invalid. (errno2=0xC00B0022) I'll chase that mesage and see what I can decipher. Regards Lorne -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C Novice
On Fri, 6 Mar 2009 21:29:17 -0500, Lorne Dudley wrote:
>I'm a novice trying to get a simple C program running under MVS.
>
>I'm attempting to get file output to
>//OUTF DD SYSOUT=A
>with the following program.
>
>#include
>int main(void)
>{
> FILE *outf = NULL;
> printf("TESTFILE has been entered.\n");
> outf = fopen("dd:OUTF","recfm=fba, w+");
> if (!outf)
> {
perror("dd:OUTF");
> printf("fopen error on FILE *outf.\n");
> return 4;
> }
> fprintf(outf, "outf open ...\n");
> fclose(outf);
> return 0;
>}
>
>So far, with many variations to the fopen string, I get only the
>following output on SYSPRINT, no output to OUTF.
>
>TESTFILE has been entered.
>fopen error on FILE *outf.
>
>Can anyone give me some advice on how to code this correctly ?
>
The "perror" function might give you more information about why fopen is
failing. See above.
Bill
--
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