Diff of /trunk/mkinitrd-magellan/busybox/util-linux/hwclock.c

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	revision 532 by niro, Sat Sep 1 22:45:15 2007 UTC	revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
#	Line 7	Line 7
7	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8	*/	*/
9
	#include <sys/ioctl.h>
10	#include <sys/utsname.h>	#include <sys/utsname.h>
11	#include <getopt.h>	#include "libbb.h"
12	#include "busybox.h"	#include "rtc_.h"
	/* Copied from linux/rtc.h to eliminate the kernel dependency */
	struct linux_rtc_time {
	int tm_sec;
	int tm_min;
	int tm_hour;
	int tm_mday;
	int tm_mon;
	int tm_year;
	int tm_wday;
	int tm_yday;
	int tm_isdst;
	};
	#define RTC_SET_TIME   _IOW('p', 0x0a, struct linux_rtc_time) /* Set RTC time    */
	#define RTC_RD_TIME    _IOR('p', 0x09, struct linux_rtc_time) /* Read RTC time   */
13
14	#if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS	#if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
15	# ifndef _GNU_SOURCE	# ifndef _GNU_SOURCE
#	Line 35  struct linux_rtc_time {	Line 17  struct linux_rtc_time {
17	# endif	# endif
18	#endif	#endif
19
20	static int xopen_rtc(int flags)	static const char *rtcname;
	{
	int rtc;
	rtc = open("/dev/rtc", flags);
	if (rtc < 0) {
	rtc = open("/dev/misc/rtc", flags);
	if (rtc < 0)
	bb_perror_msg_and_die("cannot access RTC");
	}
	return rtc;
	}
21
22	static time_t read_rtc(int utc)	static time_t read_rtc(int utc)
23	{	{
24	struct tm tm;	time_t ret;
25	char *oldtz = 0;	int fd;
	time_t t = 0;
	int rtc = xopen_rtc(O_RDONLY);
	memset(&tm, 0, sizeof(struct tm));
	if (ioctl(rtc, RTC_RD_TIME, &tm) < 0 )
	bb_perror_msg_and_die("cannot read time from RTC");
	tm.tm_isdst = -1; /* not known */
26
27	close(rtc);	fd = rtc_xopen(&rtcname, O_RDONLY);
28		ret = rtc_read_time(fd, utc);
29		close(fd);
30
31	if (utc) {	return ret;
	oldtz = getenv("TZ");
	setenv("TZ", "UTC 0", 1);
	tzset();
	}
	t = mktime(&tm);
	if (utc) {
	if (oldtz)
	setenv("TZ", oldtz, 1);
	else
	unsetenv("TZ");
	tzset();
	}
	return t;
32	}	}
33
34	static void write_rtc(time_t t, int utc)	static void write_rtc(time_t t, int utc)
35	{	{
36	struct tm tm;	struct tm tm;
37	int rtc = xopen_rtc(O_WRONLY);	int rtc = rtc_xopen(&rtcname, O_WRONLY);
38
39	tm = *(utc ? gmtime(&t) : localtime(&t));	tm = *(utc ? gmtime(&t) : localtime(&t));
40	tm.tm_isdst = 0;	tm.tm_isdst = 0;
41
42	if (ioctl(rtc, RTC_SET_TIME, &tm) < 0)	xioctl(rtc, RTC_SET_TIME, &tm);
	bb_perror_msg_and_die("cannot set the RTC time");
43
44	close(rtc);	close(rtc);
45	}	}
46
47	static int show_clock(int utc)	static void show_clock(int utc)
48	{	{
49	struct tm *ptm;	//struct tm *ptm;
50	time_t t;	time_t t;
51	RESERVE_CONFIG_BUFFER(buffer, 64);	char *cp;
52
53	t = read_rtc(utc);	t = read_rtc(utc);
54	ptm = localtime(&t);  /* Sets 'tzname[]' */	//ptm = localtime(&t);  /* Sets 'tzname[]' */
55
56	safe_strncpy(buffer, ctime(&t), 64);	cp = ctime(&t);
57	if (buffer[0])	if (cp[0])
58	buffer[strlen(buffer) - 1] = 0;	cp[strlen(cp) - 1] = '\0';
	//printf("%s  %.6f seconds %s\n", buffer, 0.0, utc ? "" : (ptm->tm_isdst ? tzname[1] : tzname[0]));
	printf( "%s  %.6f seconds\n", buffer, 0.0);
	RELEASE_CONFIG_BUFFER(buffer);
59
60	return 0;	//printf("%s  %.6f seconds %s\n", cp, 0.0, utc ? "" : (ptm->tm_isdst ? tzname[1] : tzname[0]));
61		printf("%s  0.000000 seconds\n", cp);
62	}	}
63
64	static int to_sys_clock(int utc)	static void to_sys_clock(int utc)
65	{	{
66	struct timeval tv = { 0, 0 };	struct timeval tv;
67	const struct timezone tz = { timezone/60 - 60*daylight, 0 };	const struct timezone tz = { timezone/60 - 60*daylight, 0 };
68
69	tv.tv_sec = read_rtc(utc);	tv.tv_sec = read_rtc(utc);
70		tv.tv_usec = 0;
71	if (settimeofday(&tv, &tz))	if (settimeofday(&tv, &tz))
72	bb_perror_msg_and_die("settimeofday() failed");	bb_perror_msg_and_die("settimeofday() failed");
	return 0;
73	}	}
74
75	static int from_sys_clock(int utc)	static void from_sys_clock(int utc)
76	{	{
77	struct timeval tv = { 0, 0 };	struct timeval tv;
	struct timezone tz = { 0, 0 };
	if (gettimeofday(&tv, &tz))
	bb_perror_msg_and_die("gettimeofday() failed");
78
79		gettimeofday(&tv, NULL);
80		//if (gettimeofday(&tv, NULL))
81		// bb_perror_msg_and_die("gettimeofday() failed");
82	write_rtc(tv.tv_sec, utc);	write_rtc(tv.tv_sec, utc);
	return 0;
	}
	#ifdef CONFIG_FEATURE_HWCLOCK_ADJTIME_FHS
	# define ADJTIME_PATH "/var/lib/hwclock/adjtime"
	#else
	# define ADJTIME_PATH "/etc/adjtime"
	#endif
	static int check_utc(void)
	{
	int utc = 0;
	FILE *f = fopen(ADJTIME_PATH, "r");
	if (f) {
	RESERVE_CONFIG_BUFFER(buffer, 128);
	while (fgets(buffer, sizeof(buffer), f)) {
	int len = strlen(buffer);
	while (len && isspace(buffer[len - 1]))
	len--;
	buffer[len] = 0;
	if (strncmp(buffer, "UTC", 3) == 0 ) {
	utc = 1;
	break;
	}
	}
	fclose(f);
	RELEASE_CONFIG_BUFFER(buffer);
	}
	return utc;
83	}	}
84
85	#define HWCLOCK_OPT_LOCALTIME   0x01	#define HWCLOCK_OPT_LOCALTIME   0x01
#	Line 175  static int check_utc(void)	Line 87  static int check_utc(void)
87	#define HWCLOCK_OPT_SHOW        0x04	#define HWCLOCK_OPT_SHOW        0x04
88	#define HWCLOCK_OPT_HCTOSYS     0x08	#define HWCLOCK_OPT_HCTOSYS     0x08
89	#define HWCLOCK_OPT_SYSTOHC     0x10	#define HWCLOCK_OPT_SYSTOHC     0x10
90		#define HWCLOCK_OPT_RTCFILE     0x20
91
92	int hwclock_main(int argc, char **argv )	int hwclock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
93		int hwclock_main(int argc UNUSED_PARAM, char **argv)
94	{	{
95	unsigned opt;	unsigned opt;
96	int utc;	int utc;
97
98	#if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS	#if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
99	static const struct option hwclock_long_options[] = {	static const char hwclock_longopts[] ALIGN1 =
100	{ "localtime", 0, 0, 'l' },	"localtime\0" No_argument "l"
101	{ "utc",       0, 0, 'u' },	"utc\0"       No_argument "u"
102	{ "show",      0, 0, 'r' },	"show\0"      No_argument "r"
103	{ "hctosys",   0, 0, 's' },	"hctosys\0"   No_argument "s"
104	{ "systohc",   0, 0, 'w' },	"systohc\0"   No_argument "w"
105	{ 0,           0, 0, 0 }	"file\0"      Required_argument "f"
106	};	;
107	applet_long_options = hwclock_long_options;	applet_long_options = hwclock_longopts;
108	#endif	#endif
109	opt_complementary = "?:r--ws:w--rs:s--wr:l--u:u--l";	opt_complementary = "r--ws:w--rs:s--wr:l--u:u--l";
110	opt = getopt32(argc, argv, "lursw");	opt = getopt32(argv, "lurswf:", &rtcname);
111
112	/* If -u or -l wasn't given check if we are using utc */	/* If -u or -l wasn't given check if we are using utc */
113	if (opt & (HWCLOCK_OPT_UTC | HWCLOCK_OPT_LOCALTIME))	if (opt & (HWCLOCK_OPT_UTC | HWCLOCK_OPT_LOCALTIME))
114	utc = opt & HWCLOCK_OPT_UTC;	utc = (opt & HWCLOCK_OPT_UTC);
115	else	else
116	utc = check_utc();	utc = rtc_adjtime_is_utc();
117
118	if (opt & HWCLOCK_OPT_HCTOSYS) {	if (opt & HWCLOCK_OPT_HCTOSYS)
119	return to_sys_clock(utc);	to_sys_clock(utc);
120	}	else if (opt & HWCLOCK_OPT_SYSTOHC)
121	else if (opt & HWCLOCK_OPT_SYSTOHC) {	from_sys_clock(utc);
122	return from_sys_clock(utc);	else
	} else {
123	/* default HWCLOCK_OPT_SHOW */	/* default HWCLOCK_OPT_SHOW */
124	return show_clock(utc);	show_clock(utc);
125	}
126		return 0;
127	}	}

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