sscanf always generates error condition

[Geraldo Veiga]

Is there a good reason why "sscanf" under ISC 2.2 always sets
"errno=9" even though it executed successfully?

This is an example:

#include <stdio.h>
extern int errno;
char s[] = "10000";
main ()
{
int tmp;
sscanf(s,"%d",&tmp);
perror("System error");
}

This is the output of the above code:

	System error: Bad file number
	(This message corresponds to errno=9)

If this a bug?  BSD's sscanf doesn't display this behavior.