core: send NULL instead of empty string
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@ -312,7 +312,7 @@ static int property_get_empty_string(
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assert(bus);
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assert(reply);
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return sd_bus_message_append(reply, "s", "");
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return sd_bus_message_append(reply, "s", NULL);
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}
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static int property_get_syscall_filter(
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@ -99,7 +99,7 @@ static int property_get_virtualization(
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return sd_bus_message_append(
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reply, "s",
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v == VIRTUALIZATION_NONE ? "" : virtualization_to_string(v));
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v == VIRTUALIZATION_NONE ? NULL : virtualization_to_string(v));
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}
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static int property_get_architecture(
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@ -81,7 +81,7 @@ static int property_get_following(
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assert(u);
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f = unit_following(u);
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return sd_bus_message_append(reply, "s", f ? f->id : "");
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return sd_bus_message_append(reply, "s", f ? f->id : NULL);
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}
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static int property_get_dependencies(
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@ -235,7 +235,7 @@ static int property_get_unit_file_preset(
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r = unit_get_unit_file_preset(u);
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return sd_bus_message_append(reply, "s",
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r < 0 ? "":
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r < 0 ? NULL:
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r > 0 ? "enabled" : "disabled");
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}
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@ -918,7 +918,7 @@ static int property_get_cgroup(
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sd_bus_error *error) {
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Unit *u = userdata;
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const char *t;
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const char *t = NULL;
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assert(bus);
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assert(reply);
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@ -932,8 +932,6 @@ static int property_get_cgroup(
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if (u->cgroup_path)
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t = isempty(u->cgroup_path) ? "/" : u->cgroup_path;
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else
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t = "";
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return sd_bus_message_append(reply, "s", t);
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}
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