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#include <u.h>
#include <libc.h>
#include <auth.h>
#include <fcall.h>
#include "../boot/boot.h"
static long lusertime(char*);
char *timeserver = "#s/boot";
void
settime(int islocal, int afd, char *rp)
{
int n, f;
int timeset;
Dir dir[2];
char timebuf[64];
print("time...");
timeset = 0;
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)
int
g2(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 long
lusertime(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;
}
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