core: move ManagerRunningAs to shared

Note: I did s/MANAGER/SYSTEMD/ everywhere, even though it makes the
patch quite verbose. Nevertheless, keeping MANAGER prefix in some
places, and SYSTEMD prefix in others would just lead to confusion down
the road. Better to rip off the band-aid now.

src/shared/install.c

@@ -59,7 +59,7 @@ static int lookup_paths_init_from_scope(LookupPaths *paths, UnitFileScope scope)
         zero(*paths);
 
         return lookup_paths_init(paths,
-                                 scope == UNIT_FILE_SYSTEM ? MANAGER_SYSTEM : MANAGER_USER,
+                                 scope == UNIT_FILE_SYSTEM ? SYSTEMD_SYSTEM : SYSTEMD_USER,
                                  scope == UNIT_FILE_USER,
                                  NULL, NULL, NULL);
 }

src/shared/path-lookup.c

@@ -22,6 +22,7 @@
 #include <assert.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <unistd.h>
 #include <errno.h>
 
@@ -31,6 +32,13 @@
 #include "path-util.h"
 #include "path-lookup.h"
 
+static const char* const systemd_running_as_table[_SYSTEMD_RUNNING_AS_MAX] = {
+        [SYSTEMD_SYSTEM] = "system",
+        [SYSTEMD_USER] = "user"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(systemd_running_as, SystemdRunningAs);
+
 int user_config_home(char **config_home) {
         const char *e;
 
@@ -224,7 +232,7 @@ fail:
 
 int lookup_paths_init(
                 LookupPaths *p,
-                ManagerRunningAs running_as,
+                SystemdRunningAs running_as,
                 bool personal,
                 const char *generator,
                 const char *generator_early,
@@ -256,7 +264,7 @@ int lookup_paths_init(
                  * for the system stuff but avoid it for user
                  * stuff. */
 
-                if (running_as == MANAGER_USER) {
+                if (running_as == SYSTEMD_USER) {
 
                         if (personal)
                                 p->unit_path = user_dirs(generator, generator_early, generator_late);
@@ -323,7 +331,7 @@ int lookup_paths_init(
                 p->unit_path = NULL;
         }
 
-        if (running_as == MANAGER_SYSTEM) {
+        if (running_as == SYSTEMD_SYSTEM) {
 #ifdef HAVE_SYSV_COMPAT
                 /* /etc/init.d/ compatibility does not matter to users */
 

src/shared/path-lookup.h

@@ -29,9 +29,17 @@ typedef struct LookupPaths {
 #endif
 } LookupPaths;
 
-#include "manager.h"
+typedef enum SystemdRunningAs {
+        SYSTEMD_SYSTEM,
+        SYSTEMD_USER,
+        _SYSTEMD_RUNNING_AS_MAX,
+        _SYSTEMD_RUNNING_AS_INVALID = -1
+} SystemdRunningAs;
+
+const char* systemd_running_as_to_string(SystemdRunningAs i);
+SystemdRunningAs systemd_running_as_from_string(const char *s);
 
 int user_config_home(char **config_home);
 
-int lookup_paths_init(LookupPaths *p, ManagerRunningAs running_as, bool personal, const char *generator, const char *generator_early, const char *generator_late);
+int lookup_paths_init(LookupPaths *p, SystemdRunningAs running_as, bool personal, const char *generator, const char *generator_early, const char *generator_late);
 void lookup_paths_free(LookupPaths *p);