Subversion Repositories planix.SVN

#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;
        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)

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;
}