Does fgets(3) really work right?

[brad at bradley.UUCP]

A student here pointed this out to me,  is this a bug?  I checked
it out on our 3B15 (V5), VAX 11/750 (4.3) and IBMPC (VENIX/86 2.0).

you check the output,  should we not get 15 chars on the first
line?  Mine prints the whole thing.

========cut here for file named "in"=========
12345678901234567890
12345
aaaaa
========cut here for "temp.c"=============
#include	<stdio.h>

main()
{
	char str[15], *cp;
	FILE *fp;

	fp = fopen("in","r");
	while((cp = fgets(str, 15, fp)) != NULL) 
		printf("%s", str);
	fclose(fp);
	exit(0);
}