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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