From:	Mark Favata <favata AT epix DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Error Writing to File
Date:	Wed, 10 Dec 1997 15:29:12 -0500
Organization:	Scorpion Industries
Lines:	24
Message-ID:	<348EFB98.25F8@epix.net>
NNTP-Posting-Host:	svcr-84ppp163.epix.net
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Can someone please help me.  I am writing an encryption program and
want to add a file wipe feature.  I plan on overwriting the file with 1,
then 2, etc.  The problem is, it keeps writing past the eof mark. 
Within about 2 seconds it has already written 2 megs to the file.  My
code doesn't seem to stop for the EOF.  Can you tell me what is wrong
with my code?

This is like the code I am using:

if((in = fopen(argv[1], "rb+")) == NULL)
{
 printf("Error opening output file.\n");
 exit(-1);
}

while(!feof(in))
{
 fprintf(in, "0");
}

fclose(in);

Mark Favata
favata AT epix DOT net

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