1 /* vi: set sw=4 ts=4: */
3 * Mini hwclock implementation for busybox
5 * Copyright (C) 2002 Robert Griebl <griebl@gmx.de>
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
10 #include <sys/utsname.h>
14 #if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
20 static const char *rtcname;
22 static time_t read_rtc(int utc)
27 fd = rtc_xopen(&rtcname, O_RDONLY);
28 ret = rtc_read_time(fd, utc);
34 static void write_rtc(time_t t, int utc)
37 int rtc = rtc_xopen(&rtcname, O_WRONLY);
45 xioctl(rtc, RTC_SET_TIME, &tm);
50 static void show_clock(int utc)
57 //ptm = localtime(&t); /* Sets 'tzname[]' */
61 cp[strlen(cp) - 1] = '\0';
63 //printf("%s %.6f seconds %s\n", cp, 0.0, utc ? "" : (ptm->tm_isdst ? tzname[1] : tzname[0]));
64 printf("%s 0.000000 seconds\n", cp);
67 static void to_sys_clock(int utc)
70 const struct timezone tz = { timezone/60 - 60*daylight, 0 };
72 tv.tv_sec = read_rtc(utc);
74 if (settimeofday(&tv, &tz))
75 bb_perror_msg_and_die("settimeofday() failed");
78 static void from_sys_clock(int utc)
82 gettimeofday(&tv, NULL);
83 //if (gettimeofday(&tv, NULL))
84 // bb_perror_msg_and_die("gettimeofday() failed");
85 write_rtc(tv.tv_sec, utc);
88 #define HWCLOCK_OPT_LOCALTIME 0x01
89 #define HWCLOCK_OPT_UTC 0x02
90 #define HWCLOCK_OPT_SHOW 0x04
91 #define HWCLOCK_OPT_HCTOSYS 0x08
92 #define HWCLOCK_OPT_SYSTOHC 0x10
93 #define HWCLOCK_OPT_RTCFILE 0x20
95 int hwclock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
96 int hwclock_main(int argc UNUSED_PARAM, char **argv)
101 #if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
102 static const char hwclock_longopts[] ALIGN1 =
103 "localtime\0" No_argument "l"
104 "utc\0" No_argument "u"
105 "show\0" No_argument "r"
106 "hctosys\0" No_argument "s"
107 "systohc\0" No_argument "w"
108 "file\0" Required_argument "f"
110 applet_long_options = hwclock_longopts;
112 opt_complementary = "r--ws:w--rs:s--wr:l--u:u--l";
113 opt = getopt32(argv, "lurswf:", &rtcname);
115 /* If -u or -l wasn't given check if we are using utc */
116 if (opt & (HWCLOCK_OPT_UTC | HWCLOCK_OPT_LOCALTIME))
117 utc = (opt & HWCLOCK_OPT_UTC);
119 utc = rtc_adjtime_is_utc();
121 if (opt & HWCLOCK_OPT_HCTOSYS)
123 else if (opt & HWCLOCK_OPT_SYSTOHC)
126 /* default HWCLOCK_OPT_SHOW */