操作系统SunOS 4.1.3版本的源码

				#ifndef lint				static	char sccsid[] = "@(#)strncpy.c 1.1 92/07/30 SMI"; /* from S5R2 1.3 */				#endif								/*LINTLIBRARY*/				/*				 * Copy s2 to s1, truncating or null-padding to always copy n bytes				 * return s1				 */								char *				strncpy(s1, s2, n)				register char *s1, *s2;				register int n;				{					register char *os1 = s1;									while (--n >= 0)						if ((*s1++ = *s2++) == '\0')							while (--n >= 0)								*s1++ = '\0';					return (os1);				}