core: add a new unit file state "generated"

Now that we store the generator directories in LookupPaths we can use this to
intrdouce a new unit file state called "generated", for units in these
directories.

Fixes: #2348

4 files changed, 37 insertions, 7 deletions

diff --git a/man/systemctl.xml b/man/systemctl.xml
index 089fb0f5c3..0febdfd4de 100644
--- a/man/systemctl.xml
+++ b/man/systemctl.xml
@@ -1168,22 +1168,27 @@ kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service
                   </row>
                   <row>
                     <entry><literal>static</literal></entry>
-                    <entry>The unit file is not enabled, and has no provisions for enabling in the <literal>[Install]</literal> section.</entry>
+                    <entry>The unit file is not enabled, and has no provisions for enabling in the <literal>[Install]</literal> unit file section.</entry>
                     <entry>0</entry>
                   </row>
                   <row>
                     <entry><literal>indirect</literal></entry>
-                    <entry>The unit file itself is not enabled, but it has a non-empty <varname>Also=</varname> setting in the <literal>[Install]</literal> section, listing other unit files that might be enabled.</entry>
+                    <entry>The unit file itself is not enabled, but it has a non-empty <varname>Also=</varname> setting in the <literal>[Install]</literal> unit file section, listing other unit files that might be enabled.</entry>
                     <entry>0</entry>
                   </row>
                   <row>
                     <entry><literal>disabled</literal></entry>
-                    <entry>Unit file is not enabled, but contains an <literal>[Install]</literal> section with installation instructions.</entry>
+                    <entry>The unit file is not enabled, but contains an <literal>[Install]</literal> section with installation instructions.</entry>
                     <entry>&gt; 0</entry>
                   </row>
                   <row>
+                    <entry><literal>generated</literal></entry>
+                    <entry>The unit file was generated dynamically via a generator tool. See <citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>. Generated unit files may not be enabled, they are enabled implicitly by their generator.</entry>
+                    <entry>0</entry>
+                  </row>
+                  <row>
                     <entry><literal>bad</literal></entry>
-                    <entry>Unit file is invalid or another error occurred. Note that <command>is-enabled</command> will not actually return this state, but print an error message instead. However the unit file listing printed by <command>list-unit-files</command> might show it.</entry>
+                    <entry>The unit file is invalid or another error occurred. Note that <command>is-enabled</command> will not actually return this state, but print an error message instead. However the unit file listing printed by <command>list-unit-files</command> might show it.</entry>
                     <entry>&gt; 0</entry>
                   </row>
                 </tbody>
diff --git a/src/shared/install.c b/src/shared/install.c
index e232d76dd7..202d16e129 100644
--- a/src/shared/install.c
+++ b/src/shared/install.c
@@ -82,6 +82,20 @@ static int in_search_path(const char *path, char **search) {
         return false;
 }
 
+static int unit_file_is_generated(const LookupPaths *p, const char *path) {
+        _cleanup_free_ char *parent = NULL;
+
+        assert(path);
+
+        parent = dirname_malloc(path);
+        if (!parent)
+                return -ENOMEM;
+
+        return path_equal(p->generator, parent) ||
+                path_equal(p->generator_early, parent) ||
+                path_equal(p->generator_late, parent);
+}
+
 static int get_config_path(UnitFileScope scope, bool runtime, const char *root_dir, char **ret) {
         char *p = NULL;
         int r;
@@ -2023,6 +2037,14 @@ int unit_file_lookup_state(
                 break;
 
         case UNIT_FILE_TYPE_REGULAR:
+                r = unit_file_is_generated(paths, i->path);
+                if (r < 0)
+                        return r;
+                if (r > 0) {
+                        state = UNIT_FILE_GENERATED;
+                        break;
+                }
+
                 r = find_symlinks_in_scope(scope, root_dir, i->name, &state);
                 if (r < 0)
                         return r;
@@ -2453,6 +2475,7 @@ static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = {
         [UNIT_FILE_STATIC] = "static",
         [UNIT_FILE_DISABLED] = "disabled",
         [UNIT_FILE_INDIRECT] = "indirect",
+        [UNIT_FILE_GENERATED] = "generated",
         [UNIT_FILE_BAD] = "bad",
 };
 
diff --git a/src/shared/install.h b/src/shared/install.h
index 82b6d425eb..18aad65d50 100644
--- a/src/shared/install.h
+++ b/src/shared/install.h
@@ -54,6 +54,7 @@ enum UnitFileState {
         UNIT_FILE_STATIC,
         UNIT_FILE_DISABLED,
         UNIT_FILE_INDIRECT,
+        UNIT_FILE_GENERATED,
         UNIT_FILE_BAD,
         _UNIT_FILE_STATE_MAX,
         _UNIT_FILE_STATE_INVALID = -1
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 4d0b4754ae..6394b4749e 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -5783,7 +5783,8 @@ static int unit_is_enabled(int argc, char *argv[], void *userdata) {
                                    UNIT_FILE_ENABLED,
                                    UNIT_FILE_ENABLED_RUNTIME,
                                    UNIT_FILE_STATIC,
-                                   UNIT_FILE_INDIRECT))
+                                   UNIT_FILE_INDIRECT,
+                                   UNIT_FILE_GENERATED))
                                 enabled = true;
 
                         if (!arg_quiet)
@@ -5818,7 +5819,7 @@ static int unit_is_enabled(int argc, char *argv[], void *userdata) {
                         if (r < 0)
                                 return bus_log_parse_error(r);
 
-                        if (STR_IN_SET(s, "enabled", "enabled-runtime", "static", "indirect"))
+                        if (STR_IN_SET(s, "enabled", "enabled-runtime", "static", "indirect", "generated"))
                                 enabled = true;
 
                         if (!arg_quiet)
@@ -5826,7 +5827,7 @@ static int unit_is_enabled(int argc, char *argv[], void *userdata) {
                 }
         }
 
-        return !enabled;
+        return enabled ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 
 static int is_system_running(int argc, char *argv[], void *userdata) {