Error closing read file

ALTRUNVRSOFLN · #1 (**permalink**) 09-18-2006

Every time I close a file that I opened for reading I get the following error: ”Memory fault(coredump)”. And, although it does not (I think) affect the overall process (I write another file based on the file I am reading); it is something I would rather not happen. I don’t know why this is happening but it is also not the only time. I am compiling with the following param: +DD64 -I ~/dev
I would be grateful for any help

jim mcnamara · #2 (**permalink**) 09-18-2006

This happens most often because:

the FILE *ptr has changed and no longer points to the FILE structure or points to an invalid struct. buffer overflow -- overwriting the stack -- is acommon way this ocurs.

Code:

FILE *myfile=NULL;
char whatever[4]={0x0};
char *toobig="12341234";
myfile=fopen("something","r");
strcpy(whatever,toobig);
flcose(myfile);

This is a programming error (runtime error). Normally it has very little to do with how you compile a program.

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