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authorDenys Vlasenko <vda.linux@googlemail.com>2010-01-07 07:31:46 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2010-01-07 07:31:46 (GMT)
commit6959f6bc23abb9057c3ed4330dad1bc8f4a1dd7a (patch)
tree62eb6ad011ac1cb269e881c2b95c739ce8b948f6
parent5e3b14069e3fe25ec2595124e6e0103c7be4f813 (diff)
downloadbusybox-6959f6bc23abb9057c3ed4330dad1bc8f4a1dd7a.tar.gz
busybox-6959f6bc23abb9057c3ed4330dad1bc8f4a1dd7a.tar.bz2
hwclock: disable time diff code; ntpd -S script: do not wait for completion
function old new delta rtcname 4 - -4 run_script 278 273 -5 hwclock_main 466 439 -27 read_rtc 86 38 -48 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 0/3 up/down: 0/-84) Total: -84 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--networking/ntpd.c8
-rw-r--r--util-linux/hwclock.c51
2 files changed, 39 insertions, 20 deletions
diff --git a/networking/ntpd.c b/networking/ntpd.c
index d23b2c9..038f2bd 100644
--- a/networking/ntpd.c
+++ b/networking/ntpd.c
@@ -709,7 +709,10 @@ static void run_script(const char *action)
* last_update_offset, last_update_recv_time, discipline_jitter
*/
- wait4pid(spawn(argv));
+ /* Don't want to wait: it may run hwclock --systohc, and that
+ * may take some time (seconds): */
+ /*wait4pid(spawn(argv));*/
+ spawn(argv);
G.last_script_run = G.cur_time;
unsetenv("stratum");
@@ -1805,7 +1808,8 @@ static NOINLINE void ntp_init(char **argv)
setpriority(PRIO_PROCESS, 0, -15);
bb_signals((1 << SIGTERM) | (1 << SIGINT), record_signo);
- bb_signals((1 << SIGPIPE) | (1 << SIGHUP), SIG_IGN);
+ /* Removed SIGHUP here: */
+ bb_signals((1 << SIGPIPE) | (1 << SIGCHLD), SIG_IGN);
}
int ntpd_main(int argc UNUSED_PARAM, char **argv) MAIN_EXTERNALLY_VISIBLE;
diff --git a/util-linux/hwclock.c b/util-linux/hwclock.c
index 606721e..7f4c563 100644
--- a/util-linux/hwclock.c
+++ b/util-linux/hwclock.c
@@ -18,17 +18,29 @@
# endif
#endif
-static const char *rtcname;
-static time_t read_rtc(struct timeval *sys_tv, int utc)
+/* diff code is disabled: it's not sys/hw clock diff, it's some useless
+ * "time between hwclock was started and we saw CMOS tick" quantity.
+ * It's useless since hwclock is started at a random moment,
+ * thus the quantity is also random, useless. Showing 0.000000 does not
+ * deprive us from any useful info. */
+#define SHOW_HWCLOCK_DIFF 0
+
+
+#if !SHOW_HWCLOCK_DIFF
+# define read_rtc(pp_rtcname, sys_tv, utc) read_rtc(pp_rtcname, utc)
+#endif
+static time_t read_rtc(const char **pp_rtcname, struct timeval *sys_tv, int utc)
{
struct tm tm;
int fd;
- int before;
- fd = rtc_xopen(&rtcname, O_RDONLY);
+ fd = rtc_xopen(pp_rtcname, O_RDONLY);
rtc_read_tm(&tm, fd);
+
+#if SHOW_HWCLOCK_DIFF
+ int before;
before = tm.tm_sec;
while (1) {
rtc_read_tm(&tm, fd);
@@ -36,6 +48,7 @@ static time_t read_rtc(struct timeval *sys_tv, int utc)
if (before != tm.tm_sec)
break;
}
+#endif
if (ENABLE_FEATURE_CLEAN_UP)
close(fd);
@@ -43,19 +56,19 @@ static time_t read_rtc(struct timeval *sys_tv, int utc)
return rtc_tm2time(&tm, utc);
}
-static void show_clock(int utc)
+static void show_clock(const char **pp_rtcname, int utc)
{
- struct timeval sys_tv;
time_t t;
- long diff;
char *cp;
- t = read_rtc(&sys_tv, utc);
-
+ t = read_rtc(pp_rtcname, &sys_tv, utc);
cp = ctime(&t);
strchrnul(cp, '\n')[0] = '\0';
+ printf("%s 0.000000 seconds\n", cp);
- //printf("%s 0.000000 seconds %s\n", cp, utc ? "" : (ptm->tm_isdst ? tzname[1] : tzname[0]));
+#if SHOW_HWCLOCK_DIFF
+ struct timeval sys_tv;
+ long diff;
diff = sys_tv.tv_sec - t;
if (diff < 0 /*&& tv.tv_usec != 0*/) {
/* Why? */
@@ -68,9 +81,10 @@ static void show_clock(int utc)
sys_tv.tv_usec = 999999 - sys_tv.tv_usec;
}
printf("%s %ld.%06lu seconds\n", cp, diff, (unsigned long)sys_tv.tv_usec);
+#endif
}
-static void to_sys_clock(int utc)
+static void to_sys_clock(const char **pp_rtcname, int utc)
{
struct timeval tv;
struct timezone tz;
@@ -78,19 +92,19 @@ static void to_sys_clock(int utc)
tz.tz_minuteswest = timezone/60 - 60*daylight;
tz.tz_dsttime = 0;
- tv.tv_sec = read_rtc(NULL, utc);
+ tv.tv_sec = read_rtc(pp_rtcname, NULL, utc);
tv.tv_usec = 0;
if (settimeofday(&tv, &tz))
- bb_perror_msg_and_die("settimeofday() failed");
+ bb_perror_msg_and_die("settimeofday");
}
-static void from_sys_clock(int utc)
+static void from_sys_clock(const char **pp_rtcname, int utc)
{
#define TWEAK_USEC 200
struct tm tm;
struct timeval tv;
unsigned adj = TWEAK_USEC;
- int rtc = rtc_xopen(&rtcname, O_WRONLY);
+ int rtc = rtc_xopen(pp_rtcname, O_WRONLY);
/* Try to catch the moment when whole second is close */
while (1) {
@@ -165,6 +179,7 @@ static void from_sys_clock(int utc)
int hwclock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int hwclock_main(int argc UNUSED_PARAM, char **argv)
{
+ const char *rtcname = NULL;
unsigned opt;
int utc;
@@ -189,12 +204,12 @@ int hwclock_main(int argc UNUSED_PARAM, char **argv)
utc = rtc_adjtime_is_utc();
if (opt & HWCLOCK_OPT_HCTOSYS)
- to_sys_clock(utc);
+ to_sys_clock(&rtcname, utc);
else if (opt & HWCLOCK_OPT_SYSTOHC)
- from_sys_clock(utc);
+ from_sys_clock(&rtcname, utc);
else
/* default HWCLOCK_OPT_SHOW */
- show_clock(utc);
+ show_clock(&rtcname, utc);
return 0;
}