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
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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); 
>}
>