From:	rafael AT geninfor DOT com (Rafael García)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Multiplie Redirections in dos.
Date:	Wed, 03 Jul 2002 18:00:22 GMT
Organization:	Telefonica Data Espagna
Lines:	44
Message-ID:	<3d233985.12726555@news.mad.ttd.net>
References:	<BC9127369D17D511B3FB00D0B79134770A8BFC30 AT snlams200 DOT netherlands DOT ncr DOT com>
NNTP-Posting-Host:	80-24-251-44.uc.nombres.ttd.es
X-Trace:	nsnmrro2-gest.nuria.telefonica-data.net 1025719044 26502 80.24.251.44 (3 Jul 2002 17:57:24 GMT)
X-Complaints-To:	usenet AT nsnmrro2-gest DOT nuria DOT telefonica-data DOT net
NNTP-Posting-Date:	Wed, 3 Jul 2002 17:57:24 +0000 (UTC)
X-Newsreader:	Forte Free Agent 1.21/32.243
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

On Wed, 3 Jul 2002 12:08:22 +0200, "Allsted, Geir"
<ga180600 AT exchange DOT Netherlands DOT NCR DOT COM> wrote:

>Hi.
>
>I've encountered a problem, that I'm not sure is related to djgpp or windows
>itself.
>The problem is when you redirect from stdin to stdout several times. I've
>been able to narrow it
>down to this:
>
>Source:
>
>#include <stdio.h>
>
>int main()
>{
>  char textline[1024]; 
>  while(gets(textline))
>  {
>        printf(textline); 


this has at least three problems:

1)  printf will try to use textline as a mask for output parameters,
it will break if textline contains '%'.

Use printf("%s",textline) instead.

2) this skip new lines, so when you give its output to the same
program you get lines larger than 1024 chars. 

Use  printf("%s\n",textline) instead

3) given an input file with large lines your 1024 char vector could be
too short. Use fgets() instead.

>
>  }                      
>        fflush (stdout); 
>}
>

- Raw text -