/* vi: set sw=4 ts=4: */ /* * Mini hwclock implementation for busybox * * Copyright (C) 2002 Robert Griebl <griebl@gmx.de> * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ #include <sys/utsname.h> #include "libbb.h" #include "rtc_.h" #if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS # ifndef _GNU_SOURCE # define _GNU_SOURCE # endif #endif static const char *rtcname; static time_t read_rtc(int utc) { time_t ret; int fd; fd = rtc_xopen(&rtcname, O_RDONLY); ret = rtc_read_time(fd, utc); close(fd); return ret; } static void write_rtc(time_t t, int utc) { struct tm tm; int rtc = rtc_xopen(&rtcname, O_WRONLY); tm = *(utc ? gmtime(&t) : localtime(&t)); tm.tm_isdst = 0; xioctl(rtc, RTC_SET_TIME, &tm); close(rtc); } static void show_clock(int utc) { //struct tm *ptm; time_t t; char *cp; t = read_rtc(utc); //ptm = localtime(&t); /* Sets 'tzname[]' */ cp = ctime(&t); if (cp[0]) cp[strlen(cp) - 1] = '\0'; //printf("%s %.6f seconds %s\n", cp, 0.0, utc ? "" : (ptm->tm_isdst ? tzname[1] : tzname[0])); printf("%s 0.000000 seconds\n", cp); } static void to_sys_clock(int utc) { struct timeval tv; const struct timezone tz = { timezone/60 - 60*daylight, 0 }; tv.tv_sec = read_rtc(utc); tv.tv_usec = 0; if (settimeofday(&tv, &tz)) bb_perror_msg_and_die("settimeofday() failed"); } static void from_sys_clock(int utc) { struct timeval tv; gettimeofday(&tv, NULL); //if (gettimeofday(&tv, NULL)) // bb_perror_msg_and_die("gettimeofday() failed"); write_rtc(tv.tv_sec, utc); } #define HWCLOCK_OPT_LOCALTIME 0x01 #define HWCLOCK_OPT_UTC 0x02 #define HWCLOCK_OPT_SHOW 0x04 #define HWCLOCK_OPT_HCTOSYS 0x08 #define HWCLOCK_OPT_SYSTOHC 0x10 #define HWCLOCK_OPT_RTCFILE 0x20 int hwclock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int hwclock_main(int argc UNUSED_PARAM, char **argv) { unsigned opt; int utc; #if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS static const char hwclock_longopts[] ALIGN1 = "localtime\0" No_argument "l" "utc\0" No_argument "u" "show\0" No_argument "r" "hctosys\0" No_argument "s" "systohc\0" No_argument "w" "file\0" Required_argument "f" ; applet_long_options = hwclock_longopts; #endif opt_complementary = "r--ws:w--rs:s--wr:l--u:u--l"; opt = getopt32(argv, "lurswf:", &rtcname); /* If -u or -l wasn't given check if we are using utc */ if (opt & (HWCLOCK_OPT_UTC | HWCLOCK_OPT_LOCALTIME)) utc = (opt & HWCLOCK_OPT_UTC); else utc = rtc_adjtime_is_utc(); if (opt & HWCLOCK_OPT_HCTOSYS) to_sys_clock(utc); else if (opt & HWCLOCK_OPT_SYSTOHC) from_sys_clock(utc); else /* default HWCLOCK_OPT_SHOW */ show_clock(utc); return 0; }