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From 1a3dd33f98312421e0f3d654e8f5d56554557a8c Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Fri, 3 Oct 2014 21:34:14 -0400
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Subject: [PATCH] Revert "timedated: manage systemd-timesyncd directly instead
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 of lists of alternatives"
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This reverts commit b72ddf0f4f552dd53d6404b6ddbc9f17d02b8e12.
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Conflicts:
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	Makefile.am
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	NEWS
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	src/timedate/timedated.c
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---
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 Makefile.am              |   9 ++
23b3cf
 src/timedate/timedated.c | 252 +++++++++++++++++++++++++--------------
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 2 files changed, 170 insertions(+), 91 deletions(-)
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diff --git a/Makefile.am b/Makefile.am
Pablo Greco 48fc63
index 9e64d6f988..bf65b24060 100644
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--- a/Makefile.am
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+++ b/Makefile.am
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@@ -111,6 +111,7 @@ catalogdir=$(prefix)/lib/systemd/catalog
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 kernelinstalldir = $(prefix)/lib/kernel/install.d
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 factory_etcdir = $(prefix)/share/factory/etc
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 factory_pamdir = $(prefix)/share/factory/etc/pam.d
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+ntpunitsdir=$(prefix)/lib/systemd/ntp-units.d
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 # And these are the special ones for /
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 rootprefix=@rootprefix@
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@@ -5101,6 +5102,10 @@ dist_systemunit_DATA_busnames += \
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 polkitpolicy_files += \
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 	src/timedate/org.freedesktop.timedate1.policy
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+INSTALL_DIRS += \
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+	$(prefix)/lib/systemd/ntp-units.d \
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+	$(sysconfdir)/systemd/ntp-units.d
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+
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 SYSTEM_UNIT_ALIASES += \
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 	systemd-timedated.service dbus-org.freedesktop.timedate1.service
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@@ -5177,6 +5182,10 @@ EXTRA_DIST += \
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 CLEANFILES += \
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 	src/timesync/timesyncd.conf
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+
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+dist_ntpunits_DATA = \
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+	src/timesync/90-systemd.list
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+
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 endif
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 # ------------------------------------------------------------------------------
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diff --git a/src/timedate/timedated.c b/src/timedate/timedated.c
Pablo Greco 48fc63
index 753c3d1d65..66097ef741 100644
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--- a/src/timedate/timedated.c
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+++ b/src/timedate/timedated.c
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@@ -186,141 +186,211 @@ static int context_write_data_local_rtc(Context *c) {
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         return write_string_file_atomic_label("/etc/adjtime", w);
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 }
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+static char** get_ntp_services(void) {
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+        _cleanup_strv_free_ char **r = NULL, **files = NULL;
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+        char **i;
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+        int k;
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+
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+        k = conf_files_list(&files, ".list", NULL,
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+                            "/etc/systemd/ntp-units.d",
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+                            "/run/systemd/ntp-units.d",
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+                            "/usr/local/lib/systemd/ntp-units.d",
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+                            "/usr/lib/systemd/ntp-units.d",
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+                            NULL);
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+        if (k < 0)
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+                return NULL;
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+
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+        STRV_FOREACH(i, files) {
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+                _cleanup_fclose_ FILE *f;
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+
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+                f = fopen(*i, "re");
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+                if (!f)
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+                        continue;
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+
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+                for (;;) {
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+                        char line[PATH_MAX], *l;
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+
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+                        if (!fgets(line, sizeof(line), f)) {
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+                                if (ferror(f))
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+                                        log_error("Failed to read NTP unit file: %m");
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+
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+                                break;
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+                        }
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+
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+                        l = strstrip(line);
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+                        if (l[0] == 0 || l[0] == '#')
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+                                continue;
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+
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+                        if (strv_extend(&r, l) < 0) {
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+                                log_oom();
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+                                return NULL;
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+                        }
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+                }
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+        }
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+
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+        i = r;
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+        r = NULL; /* avoid cleanup */
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+
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+        return strv_uniq(i);
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+}
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+
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 static int context_read_ntp(Context *c, sd_bus *bus) {
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-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
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-        sd_bus_message *reply = NULL;
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-        const char *s;
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+        _cleanup_strv_free_ char **l;
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+        char **i;
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         int r;
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         assert(c);
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         assert(bus);
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-        r = sd_bus_call_method(
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-                        bus,
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-                        "org.freedesktop.systemd1",
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-                        "/org/freedesktop/systemd1",
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-                        "org.freedesktop.systemd1.Manager",
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-                        "GetUnitFileState",
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-                        &error,
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-                        &reply,
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-                        "s",
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-                        "systemd-timesyncd.service");
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+        l = get_ntp_services();
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+        STRV_FOREACH(i, l) {
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+                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
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+                sd_bus_message *reply = NULL;
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+                const char *s;
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-        if (r < 0) {
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-                if (sd_bus_error_has_name(&error, SD_BUS_ERROR_FILE_NOT_FOUND) ||
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-                    sd_bus_error_has_name(&error, "org.freedesktop.systemd1.LoadFailed") ||
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-                    sd_bus_error_has_name(&error, "org.freedesktop.systemd1.NoSuchUnit"))
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-                        return 0;
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+                r = sd_bus_call_method(
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+                                bus,
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+                                "org.freedesktop.systemd1",
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+                                "/org/freedesktop/systemd1",
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+                                "org.freedesktop.systemd1.Manager",
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+                                "GetUnitFileState",
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+                                &error,
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+                                &reply,
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+                                "s",
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+                                *i);
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-                return r;
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-        }
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+                if (r < 0) {
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+                        /* This implementation does not exist. Try the next one. */
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+                        if (sd_bus_error_has_name(&error, SD_BUS_ERROR_FILE_NOT_FOUND))
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+                                continue;
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-        r = sd_bus_message_read(reply, "s", &s);
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-        if (r < 0)
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-                return r;
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+                        return r;
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+                }
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+
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+                r = sd_bus_message_read(reply, "s", &s);
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+                if (r < 0)
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+                        return r;
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-        c->can_ntp = true;
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-        c->use_ntp = STR_IN_SET(s, "enabled", "enabled-runtime");
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+                c->can_ntp = true;
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+                c->use_ntp = STR_IN_SET(s, "enabled", "enabled-runtime");
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+
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+                return 0;
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+        }
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         return 0;
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 }
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 static int context_start_ntp(Context *c, sd_bus *bus, sd_bus_error *error) {
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+        _cleanup_strv_free_ char **l = NULL;
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+        char **i;
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         int r;
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         assert(c);
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         assert(bus);
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         assert(error);
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-        if (c->use_ntp)
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-                r = sd_bus_call_method(
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-                                bus,
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-                                "org.freedesktop.systemd1",
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-                                "/org/freedesktop/systemd1",
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-                                "org.freedesktop.systemd1.Manager",
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-                                "StartUnit",
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-                                error,
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-                                NULL,
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-                                "ss",
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-                                "systemd-timesyncd.service",
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-                                "replace");
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-        else
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-                r = sd_bus_call_method(
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-                                bus,
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-                                "org.freedesktop.systemd1",
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-                                "/org/freedesktop/systemd1",
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-                                "org.freedesktop.systemd1.Manager",
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-                                "StopUnit",
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-                                error,
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-                                NULL,
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-                                "ss",
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-                                "systemd-timesyncd.service",
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-                                "replace");
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+        l = get_ntp_services();
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+        STRV_FOREACH(i, l) {
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+
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+                if (c->use_ntp)
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+                        r = sd_bus_call_method(
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+                                        bus,
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+                                        "org.freedesktop.systemd1",
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+                                        "/org/freedesktop/systemd1",
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+                                        "org.freedesktop.systemd1.Manager",
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+                                        "StartUnit",
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+                                        error,
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+                                        NULL,
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+                                        "ss", *i, "replace");
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+                else
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+                        r = sd_bus_call_method(
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+                                        bus,
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+                                        "org.freedesktop.systemd1",
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+                                        "/org/freedesktop/systemd1",
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+                                        "org.freedesktop.systemd1.Manager",
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+                                        "StopUnit",
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+                                        error,
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+                                        NULL,
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+                                        "ss", *i, "replace");
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+
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+                if (r < 0) {
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+                        if (sd_bus_error_has_name(error, SD_BUS_ERROR_FILE_NOT_FOUND) ||
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+                            sd_bus_error_has_name(error, "org.freedesktop.systemd1.LoadFailed") ||
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+                            sd_bus_error_has_name(error, "org.freedesktop.systemd1.NoSuchUnit")) {
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+                                /* This implementation does not exist. Try the next one. */
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+                                sd_bus_error_free(error);
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+                                continue;
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+                        }
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-        if (r < 0) {
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-                if (sd_bus_error_has_name(error, SD_BUS_ERROR_FILE_NOT_FOUND) ||
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-                    sd_bus_error_has_name(error, "org.freedesktop.systemd1.LoadFailed") ||
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-                    sd_bus_error_has_name(error, "org.freedesktop.systemd1.NoSuchUnit"))
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-                        return sd_bus_error_set_const(error, "org.freedesktop.timedate1.NoNTPSupport", "NTP not supported.");
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+                        return r;
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+                }
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-                return r;
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+                return 1;
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         }
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-        return 0;
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+        sd_bus_error_set_const(error, "org.freedesktop.timedate1.NoNTPSupport", "NTP not supported.");
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+        return -ENOTSUP;
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 }
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 static int context_enable_ntp(Context*c, sd_bus *bus, sd_bus_error *error) {
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+        _cleanup_strv_free_ char **l = NULL;
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+        char **i;
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         int r;
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         assert(c);
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         assert(bus);
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         assert(error);
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-        if (c->use_ntp)
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-                r = sd_bus_call_method(
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-                                bus,
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-                                "org.freedesktop.systemd1",
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-                                "/org/freedesktop/systemd1",
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-                                "org.freedesktop.systemd1.Manager",
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-                                "EnableUnitFiles",
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-                                error,
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-                                NULL,
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-                                "asbb", 1,
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-                                "systemd-timesyncd.service",
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-                                false, true);
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-        else
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+        l = get_ntp_services();
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+        STRV_FOREACH(i, l) {
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+                if (c->use_ntp)
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+                        r = sd_bus_call_method(
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+                                        bus,
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+                                        "org.freedesktop.systemd1",
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+                                        "/org/freedesktop/systemd1",
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+                                        "org.freedesktop.systemd1.Manager",
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+                                        "EnableUnitFiles",
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+                                        error,
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+                                        NULL,
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+                                        "asbb", 1, *i, false, true);
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+                else
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+                        r = sd_bus_call_method(
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+                                        bus,
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+                                        "org.freedesktop.systemd1",
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+                                        "/org/freedesktop/systemd1",
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+                                        "org.freedesktop.systemd1.Manager",
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+                                        "DisableUnitFiles",
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+                                        error,
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+                                        NULL,
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+                                        "asb", 1, *i, false);
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+
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+                if (r < 0) {
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+                        if (sd_bus_error_has_name(error, SD_BUS_ERROR_FILE_NOT_FOUND)) {
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+                                /* This implementation does not exist. Try the next one. */
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+                                sd_bus_error_free(error);
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+                                continue;
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+                        }
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+
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+                        return r;
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+                }
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+
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                 r = sd_bus_call_method(
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                                 bus,
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                                 "org.freedesktop.systemd1",
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                                 "/org/freedesktop/systemd1",
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                                 "org.freedesktop.systemd1.Manager",
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-                                "DisableUnitFiles",
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+                                "Reload",
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                                 error,
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                                 NULL,
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-                                "asb", 1,
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-                                "systemd-timesyncd.service",
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-                                false);
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-
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-        if (r < 0) {
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-                if (sd_bus_error_has_name(error, SD_BUS_ERROR_FILE_NOT_FOUND))
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-                        return sd_bus_error_set_const(error, "org.freedesktop.timedate1.NoNTPSupport", "NTP not supported.");
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+                                NULL);
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+                if (r < 0)
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+                        return r;
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-                return r;
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+                return 1;
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         }
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-        r = sd_bus_call_method(
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-                        bus,
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-                        "org.freedesktop.systemd1",
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-                        "/org/freedesktop/systemd1",
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-                        "org.freedesktop.systemd1.Manager",
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-                        "Reload",
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-                        error,
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-                        NULL,
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-                        NULL);
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-        if (r < 0)
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-                return r;
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-
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-        return 0;
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+        sd_bus_error_set_const(error, "org.freedesktop.timedate1.NoNTPSupport", "NTP not supported.");
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+        return -ENOTSUP;
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 }
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 static int property_get_rtc_time(