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systemctl,pid1: do not warn about missing install info with "preset"
When "preset" was executed for a unit without install info, we'd warn similarly as for "enable" and "disable". But "preset" is usually called for all units, because the preset files are provided by the distribution, and the units are under control of individual programs, and it's reasonable to call "preset" for all units rather then try to do it only for the ones that can be installed. We also don't warn about missing info for "preset-all". Thus it seems reasonable to silently ignore units w/o install info when presetting. (In addition, when more than one unit was specified, we'd issue the warning only if none of them had install info. But this is probably something to fix for enable/disable too.)
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@ -1084,22 +1084,22 @@ kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service
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<term><command>preset <replaceable>NAME</replaceable>...</command></term>
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<listitem>
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<para>Reset one or more unit files, as specified on the
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command line, to the defaults configured in the preset
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policy files. This has the same effect as
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<command>disable</command> or <command>enable</command>,
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depending how the unit is listed in the preset files.</para>
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<para>Reset the enable/disable status one or more unit files, as specified on
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the command line, to the defaults configured in the preset policy files. This
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has the same effect as <command>disable</command> or
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<command>enable</command>, depending how the unit is listed in the preset
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files.</para>
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<para>Use <option>--preset-mode=</option> to control
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whether units shall be enabled and disabled, or only
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enabled, or only disabled.</para>
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<para>Use <option>--preset-mode=</option> to control whether units shall be
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enabled and disabled, or only enabled, or only disabled.</para>
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<para>For more information on the preset policy format,
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see
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<para>If the unit carries no install information, it will be silently ignored
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by this command.</para>
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<para>For more information on the preset policy format, see
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<citerefentry><refentrytitle>systemd.preset</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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For more information on the concept of presets, please
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consult the <ulink
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url="http://freedesktop.org/wiki/Software/systemd/Preset">Preset</ulink>
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For more information on the concept of presets, please consult the
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<ulink url="http://freedesktop.org/wiki/Software/systemd/Preset">Preset</ulink>
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document.</para>
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</listitem>
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</varlistentry>
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@ -5390,6 +5390,7 @@ static int enable_unit(int argc, char *argv[], void *userdata) {
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UnitFileChange *changes = NULL;
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unsigned n_changes = 0;
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int carries_install_info = -1;
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bool ignore_carries_install_info = false;
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int r;
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if (!argv[1])
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@ -5420,7 +5421,6 @@ static int enable_unit(int argc, char *argv[], void *userdata) {
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r = unit_file_link(arg_scope, arg_runtime, arg_root, names, arg_force, &changes, &n_changes);
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else if (streq(verb, "preset")) {
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r = unit_file_preset(arg_scope, arg_runtime, arg_root, names, arg_preset_mode, arg_force, &changes, &n_changes);
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carries_install_info = r;
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} else if (streq(verb, "mask"))
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r = unit_file_mask(arg_scope, arg_runtime, arg_root, names, arg_force, &changes, &n_changes);
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else if (streq(verb, "unmask"))
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@ -5437,7 +5437,7 @@ static int enable_unit(int argc, char *argv[], void *userdata) {
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} else {
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL, *m = NULL;
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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int expect_carries_install_info = false;
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bool expect_carries_install_info = false;
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bool send_runtime = true, send_force = true, send_preset_mode = false;
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const char *method;
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sd_bus *bus;
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@ -5468,6 +5468,7 @@ static int enable_unit(int argc, char *argv[], void *userdata) {
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method = "PresetUnitFiles";
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expect_carries_install_info = true;
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ignore_carries_install_info = true;
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} else if (streq(verb, "mask"))
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method = "MaskUnitFiles";
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else if (streq(verb, "unmask")) {
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@ -5532,7 +5533,7 @@ static int enable_unit(int argc, char *argv[], void *userdata) {
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r = 0;
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}
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if (carries_install_info == 0)
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if (carries_install_info == 0 && !ignore_carries_install_info)
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log_warning("The unit files have no installation config (WantedBy, RequiredBy, Also, Alias\n"
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"settings in the [Install] section, and DefaultInstance for template units).\n"
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"This means they are not meant to be enabled using systemctl.\n"
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