+ int fd = open("/etc/localtime", O_RDONLY);
+ if(fd!=-1)
+ {
+ char hdr[44];
+ int len = read(fd, hdr, sizeof(hdr));
+ long gmtoff = -1;
+ string name;
+ if(len==44 && hdr[0]=='T' && hdr[1]=='Z' && hdr[2]=='i' && hdr[3]=='f')
+ {
+ char *ptr = hdr+20;
+ long isgmtcnt = get_long(ptr);
+ long isstdcnt = get_long(ptr);
+ long leapcnt = get_long(ptr);
+ long timecnt = get_long(ptr);
+ long typecnt = get_long(ptr);
+ long charcnt = get_long(ptr);
+ int size = timecnt*5+typecnt*6+isgmtcnt+isstdcnt+leapcnt*8+charcnt;
+ char *buf = new char[size];
+ len = read(fd, buf, size);
+ if(len==size)
+ {
+ ptr = buf;
+ int index = -1;
+ time_t cur_time = Msp::Time::now().to_unixtime();
+ for(int i=0; i<timecnt; ++i)
+ if(get_long(ptr)<=cur_time)
+ index = i;
+
+ if(index>0)
+ index = ptr[index];
+ ptr += timecnt;
+
+ int abbrind = 0;
+ for(int i=0; i<typecnt; ++i)
+ {
+ if((index>=0 && i==index) || (index<0 && !ptr[4] && gmtoff==-1))
+ {
+ gmtoff = get_long(ptr);
+ ++ptr;
+ abbrind = *ptr++;
+ }
+ else
+ ptr += 6;
+ }
+
+ name = ptr+abbrind;
+ }
+ delete[] buf;
+ }
+ close(fd);
+
+ if(gmtoff!=-1)
+ return TimeZone(gmtoff/60, name);
+ }
+ return TimeZone();