From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Weird : Segmentation fault on fwrite :(
Date: Sat, 29 Apr 2000 10:38:41 +0200
Organization: NetVision Israel	
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To: djgpp AT delorie DOT com
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HPMAN wrote:
> 
> char TestBuff[32]="123456789012345678901234567890";
> FILE *output;
> 
> int main(void) {
> if((output=fopen("file.tst","wb"))==NULL) {
>     printf("Error Opening Output File, Exiting...\n");
>     exit(0);
> } else {
>         fwrite(&TestBuff,sizeof(char),32,output);
>         fclose(output);
>        }
> return(1);
> }
> 
> Well, this sample works (hard to do fewer things ;p)
> 
> The problem is I included this test pattern in my program causing problems,
> and it doesn't work (functions are enclosed between lots of other code of
> course, but remain 100% the same...
> 
> I got a segmentation fault : fwrite doesn't report an error, the program
> crashes at the call...

Since the test program above works, it is not useful for helping you find the
problem.

I suggest to read section 12.2 of the DJGPP FAQ list, and use techniques
described there to debug your problem.