* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#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 */
+/* After libbb.h, since it needs sys/types.h on some systems */
+#include <sys/utsname.h>
+#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 void to_sys_clock(int utc)
{
struct timeval tv;
- const struct timezone tz = { timezone/60 - 60*daylight, 0 };
+ struct timezone tz;
+
+ tz.tz_minuteswest = timezone/60 - 60*daylight;
+ tz.tz_dsttime = 0;
tv.tv_sec = read_rtc(utc);
tv.tv_usec = 0;
write_rtc(tv.tv_sec, utc);
}
-#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_UTC 0x02
#define HWCLOCK_OPT_SHOW 0x04
#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 = check_utc();
+ utc = rtc_adjtime_is_utc();
- if (opt & HWCLOCK_OPT_HCTOSYS) {
+ if (opt & HWCLOCK_OPT_HCTOSYS)
to_sys_clock(utc);
- return 0;
- }
- if (opt & HWCLOCK_OPT_SYSTOHC) {
+ else if (opt & HWCLOCK_OPT_SYSTOHC)
from_sys_clock(utc);
- return 0;
- }
- /* default HWCLOCK_OPT_SHOW */
- show_clock(utc);
+ else
+ /* default HWCLOCK_OPT_SHOW */
+ show_clock(utc);
+
return 0;
}