userbdctl: show 'mapped' user range only inside of userns

Outside of userns the concept makes no sense, there cannot be users
mapped from further outside.

(cherry picked from commit e412fc5e042b8f642bcba42f5c175124583e05ae)

diff --git a/src/userdb/userdbctl.c b/src/userdb/userdbctl.c
index 1718419407bc0089e379ef76174fd820f3eeb3dc..1ff7d946f03034b1a7ad02751d188d6137192a8e 100644 (file)
--- a/src/userdb/userdbctl.c
+++ b/src/userdb/userdbctl.c
@@ -23,6 +23,7 @@
 #include "user-util.h"
 #include "userdb.h"
 #include "verbs.h"
+#include "virt.h"
 
 static enum {
         OUTPUT_CLASSIC,
@@ -130,10 +131,16 @@ static int show_user(UserRecord *ur, Table *table) {
         return 0;
 }
 
+static bool test_show_mapped(void) {
+        /* Show mapped user range only in environments where user mapping is a thing. */
+        return running_in_userns() > 0;
+}
+
 static const struct {
         uid_t first, last;
         const char *name;
         UserDisposition disposition;
+        bool (*test)(void);
 } uid_range_table[] = {
         {
                 .first = 1,
@@ -166,6 +173,7 @@ static const struct {
                 .last = MAP_UID_MAX,
                 .name = "mapped",
                 .disposition = USER_REGULAR,
+                .test = test_show_mapped,
         },
 };
 
@@ -180,6 +188,9 @@ static int table_add_uid_boundaries(Table *table, const UIDRange *p) {
                 if (!uid_range_covers(p, i->first, i->last - i->first + 1))
                         continue;
 
+                if (i->test && !i->test())
+                        continue;
+
                 name = strjoin(special_glyph(SPECIAL_GLYPH_ARROW_DOWN),
                                " begin ", i->name, " users ",
                                special_glyph(SPECIAL_GLYPH_ARROW_DOWN));
@@ -538,6 +549,9 @@ static int table_add_gid_boundaries(Table *table, const UIDRange *p) {
                 if (!uid_range_covers(p, i->first, i->last - i->first + 1))
                         continue;
 
+                if (i->test && !i->test())
+                        continue;
+
                 name = strjoin(special_glyph(SPECIAL_GLYPH_ARROW_DOWN),
                                " begin ", i->name, " groups ",
                                special_glyph(SPECIAL_GLYPH_ARROW_DOWN));