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.
11 /* After libbb.h, since it needs sys/types.h on some systems */
12 #include <sys/utsname.h>
15 #if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
21 static const char *rtcname;
23 static time_t read_rtc(int utc)
28 fd = rtc_xopen(&rtcname, O_RDONLY);
29 ret = rtc_read_time(fd, utc);
35 static void write_rtc(time_t t, int utc)
38 int rtc = rtc_xopen(&rtcname, O_WRONLY);
46 xioctl(rtc, RTC_SET_TIME, &tm);
51 static void show_clock(int utc)
58 //ptm = localtime(&t); /* Sets 'tzname[]' */
62 cp[strlen(cp) - 1] = '\0';
64 //printf("%s %.6f seconds %s\n", cp, 0.0, utc ? "" : (ptm->tm_isdst ? tzname[1] : tzname[0]));
65 printf("%s 0.000000 seconds\n", cp);
68 static void to_sys_clock(int utc)
73 tz.tz_minuteswest = timezone/60 - 60*daylight;
76 tv.tv_sec = read_rtc(utc);
78 if (settimeofday(&tv, &tz))
79 bb_perror_msg_and_die("settimeofday() failed");
82 static void from_sys_clock(int utc)
86 gettimeofday(&tv, NULL);
87 //if (gettimeofday(&tv, NULL))
88 // bb_perror_msg_and_die("gettimeofday() failed");
89 write_rtc(tv.tv_sec, utc);
92 #define HWCLOCK_OPT_LOCALTIME 0x01
93 #define HWCLOCK_OPT_UTC 0x02
94 #define HWCLOCK_OPT_SHOW 0x04
95 #define HWCLOCK_OPT_HCTOSYS 0x08
96 #define HWCLOCK_OPT_SYSTOHC 0x10
97 #define HWCLOCK_OPT_RTCFILE 0x20
99 int hwclock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
100 int hwclock_main(int argc UNUSED_PARAM, char **argv)
105 #if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
106 static const char hwclock_longopts[] ALIGN1 =
107 "localtime\0" No_argument "l"
108 "utc\0" No_argument "u"
109 "show\0" No_argument "r"
110 "hctosys\0" No_argument "s"
111 "systohc\0" No_argument "w"
112 "file\0" Required_argument "f"
114 applet_long_options = hwclock_longopts;
116 opt_complementary = "r--ws:w--rs:s--wr:l--u:u--l";
117 opt = getopt32(argv, "lurswf:", &rtcname);
119 /* If -u or -l wasn't given check if we are using utc */
120 if (opt & (HWCLOCK_OPT_UTC | HWCLOCK_OPT_LOCALTIME))
121 utc = (opt & HWCLOCK_OPT_UTC);
123 utc = rtc_adjtime_is_utc();
125 if (opt & HWCLOCK_OPT_HCTOSYS)
127 else if (opt & HWCLOCK_OPT_SYSTOHC)
130 /* default HWCLOCK_OPT_SHOW */