I did say that there were ways to save/restore the original stdout...
I know that open("CON") is technically wrong, but at the same time it
works in most cases.
On 9/16/06, Arkady V.Belousov <[EMAIL PROTECTED]> wrote:
> Hi!
>
> 16-Сен-2006 02:29 [EMAIL PROTECTED] (Blair Campbell) wrote to
> freedos-user@lists.sourceforge.net:
>
> BC> Hi. It almost sounds to me like the destination file isn't getting
> BC> flushed to the disk. I would recommend doing the recirection
> BC> internally in the C program, and then you have direct control of the
> BC> file. A simple close(1); open("blah", O_WRONLY); /* system() stuff
> BC> here: */ blah blah blah close(1); open("CON", O_WRONLY);
> BC> should do but there are also ways to 'save' the original stdout and
> BC> restore it later. Get him to contact me for details.
> >> BUT, if I do it this way:
> >> command /c dir /b c:\testdir >d:\dirout.put
> >> The file dirout.put has the directory output but CUT... it never
> >> reaches the end of the output, it just cuts...
>
> This is bug in FreeCOM. And this is reason, why in my patches for
> FreeCOM I was tried to move command.com placement into bin/ subdirectory,
> else (buggy) command.com (may) interfere with building process, but by some
> unknown reason you reject this part of patches.
>
> About manual redirecting: using open("CON") is wrong, because this
> prevents using program with redirection. The more so, if program uses
> stdio..h, this way is even more wrong. I think, better way is something
> like:
>
> int redirfd = open ("d:\dirout.put", O_CREAT | O_TRUNC | O_RDWR,
> S_IREAD | S_IWRITE);
> if (redirfd != -1) { /* check for error */
> /* if using standard streams from stdio.h: */
> flushall (); /* flush all high level buffers */
> /* now privately store own stdout... */
> int oldstdout = dup (1);
> /* ...and open redirection */
> dup2 (redirfd, 1); close (redirfd);
>
> ...now do system(), spwan*() or exec*()...
>
> dup2 (oldstdout, 1); close (oldstdout);
> }
>
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