File util-linux-2.14.1-hwclock_adjust_and_hctosys.patch of Package util-linux
From: Kurt Garloff <garloff@suse.de>
Subject: Allow to combine --adjust and --hctosys
Reference: bnc441106
Waiting for a clock tick twice when calling --adjust and --hctosys
is wasteful. Having to do it once is bad enough.
This patch allows combining the two options.
[Patch 1/5]
Index: util-linux-ng-2.14.1/hwclock/hwclock.c
===================================================================
--- util-linux-ng-2.14.1.orig/hwclock/hwclock.c
+++ util-linux-ng-2.14.1/hwclock/hwclock.c
@@ -490,13 +490,18 @@ set_hardware_clock(const time_t newtime,
}
+static int
+set_system_clock(const bool hclock_valid, const time_t newtime,
+ const bool testing, const int usec);
+
static void
set_hardware_clock_exact(const time_t sethwtime,
const struct timeval refsystime,
const bool universal,
- const bool testing) {
+ const bool testing,
+ const bool hctosys) {
/*----------------------------------------------------------------------------
Set the Hardware Clock to the time "sethwtime", in local time zone or UTC,
according to "universal".
@@ -539,8 +544,10 @@ set_hardware_clock_exact(const time_t se
if (tdiff < 0)
goto time_resync; /* probably time was reset */
} while (time_diff(nowsystime, refsystime) - 0.5 < newhwtime - sethwtime);
+ if (hctosys)
+ set_system_clock(TRUE, newhwtime, testing, 500000);
set_hardware_clock(newhwtime, universal, testing);
}
@@ -671,9 +678,9 @@ interpret_date_string(const char *date_o
static int
set_system_clock(const bool hclock_valid, const time_t newtime,
- const bool testing) {
+ const bool testing, const int usec) {
/*----------------------------------------------------------------------------
Set the System Clock to time 'newtime'.
Also set the kernel time zone value to the value indicated by the
@@ -699,9 +706,9 @@ set_system_clock(const bool hclock_valid
int minuteswest;
int rc;
tv.tv_sec = newtime;
- tv.tv_usec = 0;
+ tv.tv_usec = usec;
broken = localtime(&newtime);
#ifdef HAVE_TM_GMTOFF
minuteswest = -broken->tm_gmtoff/60; /* GNU extension */
@@ -935,9 +942,10 @@ save_adjtime(const struct adjtime adjtim
static void
do_adjustment(struct adjtime *adjtime_p,
const bool hclock_valid, const time_t hclocktime,
const struct timeval read_time,
- const bool universal, const bool testing) {
+ const bool universal, const bool testing,
+ const bool hctosys) {
/*---------------------------------------------------------------------------
Do the adjustment requested, by 1) setting the Hardware Clock (if
necessary), and 2) updating the last-adjusted time in the adjtime
structure.
@@ -990,9 +998,9 @@ do_adjustment(struct adjtime *adjtime_p,
&adjustment, &retro);
if (adjustment > 0 || adjustment < -1) {
set_hardware_clock_exact(hclocktime + adjustment,
time_inc(read_time, -retro),
- universal, testing);
+ universal, testing, hctosys);
adjtime_p->last_adj_time = hclocktime + adjustment;
adjtime_p->not_adjusted = 0;
adjtime_p->dirty = TRUE;
} else
@@ -1046,8 +1054,9 @@ manipulate_clock(const bool show, const
struct adjtime adjtime;
/* Contents of the adjtime file, or what they should be. */
int rc; /* local return code */
bool no_auth; /* User lacks necessary authorization to access the clock */
+ int usec = 0;
no_auth = ur->get_permissions();
if (no_auth)
return EX_NOPERM;
@@ -1097,15 +1106,15 @@ manipulate_clock(const bool show, const
display_time(hclock_valid, hclocktime,
time_diff(read_time, startup_time));
} else if (set) {
set_hardware_clock_exact(set_time, startup_time,
- universal, testing);
+ universal, testing, FALSE);
if (!noadjfile)
adjust_drift_factor(&adjtime, set_time, hclock_valid, hclocktime,
time_diff(read_time, startup_time));
} else if (adjust) {
do_adjustment(&adjtime, hclock_valid, hclocktime,
- read_time, universal, testing);
+ read_time, universal, testing, hctosys);
} else if (systohc) {
struct timeval nowtime, reftime;
/* We can only set_hardware_clock_exact to a whole seconds
time, so we set it with reference to the most recent
@@ -1115,14 +1124,14 @@ manipulate_clock(const bool show, const
reftime.tv_sec = nowtime.tv_sec;
reftime.tv_usec = 0;
set_hardware_clock_exact((time_t) reftime.tv_sec, reftime,
- universal, testing);
+ universal, testing, FALSE);
if (!noadjfile)
adjust_drift_factor(&adjtime, (time_t) reftime.tv_sec, hclock_valid,
hclocktime, (double) read_time.tv_usec / 1E6);
} else if (hctosys) {
- rc = set_system_clock(hclock_valid, hclocktime, testing);
+ rc = set_system_clock(hclock_valid, hclocktime, testing, usec);
if (rc) {
printf(_("Unable to set system clock.\n"));
return rc;
}
@@ -1442,9 +1451,16 @@ main(int argc, char **argv) {
"You supplied %d.\n"),
MYNAME, argc);
}
- if (show + set + systohc + hctosys + adjust + getepoch + setepoch > 1){
+ if (show + set + systohc + hctosys + getepoch + setepoch > 1){
+ fprintf(stderr, _("You have specified multiple functions.\n"
+ "You can only perform one function "
+ "at a time.\n"));
+ hwclock_exit(EX_USAGE);
+ }
+
+ if (show + set + systohc + adjust + getepoch + setepoch > 1){
fprintf(stderr, _("You have specified multiple functions.\n"
"You can only perform one function "
"at a time.\n"));
hwclock_exit(EX_USAGE);
Index: util-linux-ng-2.14.1/hwclock/hwclock.8
===================================================================
--- util-linux-ng-2.14.1.orig/hwclock/hwclock.8
+++ util-linux-ng-2.14.1/hwclock/hwclock.8
@@ -86,8 +86,12 @@ Set the Hardware Clock to the current Sy
.B \-\-adjust
Add or subtract time from the Hardware Clock to account for systematic
drift since the last time the clock was set or adjusted. See discussion
below.
+.B \-\-adjust
+can be used together with
+.B \-\-hctosys
+to speed up the boot process by 1s.
.TP
.B \-\-getepoch
Print the kernel's Hardware Clock epoch value to standard output.
This is the number of years into AD to which a zero year value in the
