#include <u.h>#include <libc.h>#include <auth.h>#include <fcall.h>#include "../boot/boot.h" static long lusertime(char*); char *timeserver = "#s/boot"; voidsettime(int islocal, int afd, char *rp){	int n, f;	Dir dir[2];	char timebuf[64];	static int timeset; 	if(timeset)		return;	print("time...");	if(islocal){		/*		 *  set the time from the real time clock		 */		f = open("#r/rtc", ORDWR);		if(f >= 0){			if((n = read(f, timebuf, sizeof(timebuf)-1)) > 0){				timebuf[n] = '\0';				timeset = 1;			}			close(f);		}else do{			strcpy(timebuf, "yymmddhhmm[ss]");			outin("\ndate/time ", timebuf, sizeof(timebuf));		}while((timeset=lusertime(timebuf)) <= 0);	}	if(timeset == 0){		/*		 *  set the time from the access time of the root		 */		f = open(timeserver, ORDWR);		if(f < 0)			return;		if(mount(f, afd, "/tmp", MREPL, rp) < 0){			warning("settime mount");			close(f);			return;		}		close(f);		if(stat("/tmp", statbuf, sizeof statbuf) < 0)			fatal("stat");		convM2D(statbuf, sizeof statbuf, &dir[0], (char*)&dir[1]);		sprint(timebuf, "%ld", dir[0].atime);		unmount(0, "/tmp");	} 	f = open("#c/time", OWRITE);	if(write(f, timebuf, strlen(timebuf)) < 0)		warning("can't set #c/time");	close(f);	print("\n");} #define SEC2MIN 60L#define SEC2HOUR (60L*SEC2MIN)#define SEC2DAY (24L*SEC2HOUR) intg2(char **pp){	int v; 	v = 10*((*pp)[0]-'0') + (*pp)[1]-'0';	*pp += 2;	return v;} /* *  days per month plus days/year */static	int	dmsize[] ={	365, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};static	int	ldmsize[] ={	366, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; /* *  return the days/month for the given year */static int *yrsize(int y){ 	if((y%4) == 0 && ((y%100) != 0 || (y%400) == 0))		return ldmsize;	else		return dmsize;} /* *  compute seconds since Jan 1 1970 */static longlusertime(char *argbuf){	char *buf;	ulong secs;	int i, y, m;	int *d2m; 	buf = argbuf;	i = strlen(buf);	if(i != 10 && i != 12)		return -1;	secs = 0;	y = g2(&buf);	m = g2(&buf);	if(y < 70)		y += 2000;	else		y += 1900; 	/*	 *  seconds per year	 */	for(i = 1970; i < y; i++){		d2m = yrsize(i);		secs += d2m[0] * SEC2DAY;	} 	/*	 *  seconds per month	 */	d2m = yrsize(y);	for(i = 1; i < m; i++)		secs += d2m[i] * SEC2DAY; 	secs += (g2(&buf)-1) * SEC2DAY;	secs += g2(&buf) * SEC2HOUR;	secs += g2(&buf) * SEC2MIN;	if(*buf)		secs += g2(&buf); 	sprint(argbuf, "%ld", secs);	return secs;}