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From: heilpern@ibd.BRL.MIL (Mark A. Heilpern )
Newsgroups: comp.unix.wizards
Subject: Unix problem or C problem?
Message-ID: <245@ibd.BRL.MIL>
Date: 17 Jan 89 13:57:01 GMT
Reply-To: heilpern@brl.arpa (Mark A. Heilpern (IBD) <heilpern>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 33


	HELPHELPHELPHELPHELPHELPHELPHELPHELPHELPHELPHELP

	When running a program with the following code:

	while (fscanf(input,"%d",stars)!=EOF) {
		fprintf(stderr,"OK to this point.\n");
		fprintf(output,"%4d |",lines++);
		stars /= 50;
		for (count = 0; count <= stars; count++)
			fprintf(output,"*");
		fprintf(output,"\n");
	}

	I get the following error message, NOT put out from my program:

PROTECTION VIOLATION: name='plot', pid=15943, pc=a410cdc, ps=80000180
Illegal instruction

	Although this section of code indicates otherwise, I am using
	standard input and output. The "OK to this point" message does
	not appear when put in this position, however it does when placed
	one line above. (Still giving the error message :)

	The 'plot' program is not setu/gid, I've never seen a PROTECTION
	VIOLATION error like this before. Any insights would be greatly
	appreciated.

		Mark A. Heilpern, heilpern@brl.mil
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