* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-//#include <sys/ioctl.h>
#include <sys/utsname.h>
-#include <getopt.h>
#include "libbb.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 */
+#include "rtc_.h"
#if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
# ifndef _GNU_SOURCE
static const char *rtcname;
-static int xopen_rtc(int flags)
-{
- int rtc;
-
- if (!rtcname) {
- rtc = open("/dev/rtc", flags);
- if (rtc >= 0)
- return rtc;
- rtc = open("/dev/rtc0", flags);
- if (rtc >= 0)
- return rtc;
- rtcname = "/dev/misc/rtc";
- }
- return xopen(rtcname, flags);
-}
-
static time_t read_rtc(int utc)
{
- struct tm tm;
- char *oldtz = 0;
- 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 */
+ time_t ret;
+ int fd;
- close(rtc);
+ fd = rtc_xopen(&rtcname, O_RDONLY);
+ ret = rtc_read_time(fd, utc);
+ close(fd);
- if (utc) {
- 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;
+ return ret;
}
static void write_rtc(time_t t, int utc)
{
struct tm tm;
- int rtc = xopen_rtc(O_WRONLY);
+ int rtc = rtc_xopen(&rtcname, O_WRONLY);
- tm = *(utc ? gmtime(&t) : localtime(&t));
+ if (utc)
+ gmtime_r(&t, &tm);
+ else
+ localtime_r(&t, &tm);
tm.tm_isdst = 0;
- if (ioctl(rtc, RTC_SET_TIME, &tm) < 0)
- bb_perror_msg_and_die("cannot set the RTC time");
+ xioctl(rtc, RTC_SET_TIME, &tm);
close(rtc);
}
-static int show_clock(int utc)
+static void show_clock(int utc)
{
- struct tm *ptm;
+ //struct tm *ptm;
time_t t;
- RESERVE_CONFIG_BUFFER(buffer, 64);
+ char *cp;
t = read_rtc(utc);
- ptm = localtime(&t); /* Sets 'tzname[]' */
-
- safe_strncpy(buffer, ctime(&t), 64);
- if (buffer[0])
- buffer[strlen(buffer) - 1] = 0;
+ //ptm = localtime(&t); /* Sets 'tzname[]' */
- //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);
+ cp = ctime(&t);
+ if (cp[0])
+ cp[strlen(cp) - 1] = '\0';
- return 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 int to_sys_clock(int utc)
+static void to_sys_clock(int utc)
{
- struct timeval tv = { 0, 0 };
+ 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");
-
- return 0;
}
-static int from_sys_clock(int utc)
+static void from_sys_clock(int utc)
{
- struct timeval tv = { 0, 0 };
- struct timezone tz = { 0, 0 };
-
- if (gettimeofday(&tv, &tz))
- bb_perror_msg_and_die("gettimeofday() failed");
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ //if (gettimeofday(&tv, NULL))
+ // bb_perror_msg_and_die("gettimeofday() failed");
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;
}
#define HWCLOCK_OPT_LOCALTIME 0x01
#define HWCLOCK_OPT_SYSTOHC 0x10
#define HWCLOCK_OPT_RTCFILE 0x20
-int hwclock_main(int argc, char **argv );
-int hwclock_main(int argc, char **argv )
+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 struct option hwclock_long_options[] = {
- { "localtime", 0, 0, 'l' },
- { "utc", 0, 0, 'u' },
- { "show", 0, 0, 'r' },
- { "hctosys", 0, 0, 's' },
- { "systohc", 0, 0, 'w' },
- { "file", 1, 0, 'f' },
- { 0, 0, 0, 0 }
- };
- applet_long_options = 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(argc, argv, "lurswf:", &rtcname);
+ 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;
+ 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
- utc = check_utc();
-
- if (opt & HWCLOCK_OPT_HCTOSYS) {
- return to_sys_clock(utc);
- }
- else if (opt & HWCLOCK_OPT_SYSTOHC) {
- return from_sys_clock(utc);
- } else {
/* default HWCLOCK_OPT_SHOW */
- return show_clock(utc);
- }
+ show_clock(utc);
+
+ return 0;
}
projects / oweals / busybox.git / blobdiff