mirror of
https://github.com/sheumann/hush.git
synced 2024-12-30 05:29:47 +00:00
128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/* 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 ATTRIBUTE_UNUSED, 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;
|
|
}
|