2.11BSD/src/lib/libc/gen/strcpy.c

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#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)strcpy.c	5.2 (Berkeley) 3/9/86";
#endif LIBC_SCCS and not lint

/*
 * Copy string s2 to s1.  s1 must be large enough.
 * return s1
 */

char *
strcpy(s1, s2)
register char *s1, *s2;
{
	register char *os1;

	os1 = s1;
	while (*s1++ = *s2++)
		;
	return(os1);
}