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