Make ELOOP be considered a File Not Found error when it comes from handlerton

Fix symlink-aria && symlink-myisam to account for this possibility.

mysql-test/r/symlink-aria-11902.result

@@ -14,7 +14,7 @@ set debug_sync='mi_open_datafile SIGNAL ok WAIT_FOR go';
 select * from t1;
 set debug_sync='now WAIT_FOR ok';
 set debug_sync='now SIGNAL go';
-ERROR HY000: File 'MYSQLTEST_VARDIR/tmp/foo/t1.MAD' not found (Errcode: 20 "Not a directory")
+ERROR HY000: File 'MYSQLTEST_VARDIR/tmp/foo/t1.MAD' not found (Errcode: 20 <errmsg>)
 flush tables;
 drop table if exists t1;
 create table t1 (a int, b char(16), index (a))
@@ -32,7 +32,7 @@ set debug_sync='mi_open_kfile SIGNAL waiting WAIT_FOR run';
 select a from t1;
 set debug_sync='now WAIT_FOR waiting';
 set debug_sync='now SIGNAL run';
-ERROR HY000: Can't find file: './test/t1.MAI' (errno: 20 "Not a directory")
+ERROR HY000: Can't find file: './test/t1.MAI' (errno: 20 <errmsg>)
 flush tables;
 drop table if exists t1;
 drop table mysql.t1;

mysql-test/r/symlink-myisam-11902.result

@@ -13,7 +13,7 @@ set debug_sync='mi_open_datafile SIGNAL ok WAIT_FOR go';
 select * from t1;
 set debug_sync='now WAIT_FOR ok';
 set debug_sync='now SIGNAL go';
-ERROR HY000: File 'MYSQLTEST_VARDIR/tmp/foo/t1.MYD' not found (Errcode: 20 "Not a directory")
+ERROR HY000: File 'MYSQLTEST_VARDIR/tmp/foo/t1.MYD' not found (Errcode: 20 <errmsg>)
 flush tables;
 drop table if exists t1;
 create table t1 (a int, b char(16), index (a))
@@ -31,7 +31,7 @@ set debug_sync='mi_open_kfile SIGNAL waiting WAIT_FOR run';
 select a from t1;
 set debug_sync='now WAIT_FOR waiting';
 set debug_sync='now SIGNAL run';
-ERROR HY000: Can't find file: './test/t1.MYI' (errno: 20 "Not a directory")
+ERROR HY000: Can't find file: './test/t1.MYI' (errno: 20 <errmsg>)
 flush tables;
 drop table if exists t1;
 drop table mysql.t1;

mysql-test/t/symlink-myisam-11902.test

@@ -25,7 +25,7 @@ exec rm -r $MYSQLTEST_VARDIR/tmp/foo;
 exec ln -s $datadir/mysql $MYSQLTEST_VARDIR/tmp/foo;
 set debug_sync='now SIGNAL go';
 connection default;
-replace_regex / '.*\/tmp\// 'MYSQLTEST_VARDIR\/tmp\// /31/20/;
+replace_regex / '.*\/tmp\// 'MYSQLTEST_VARDIR\/tmp\// /31/20/ /40/20/ /20.*/20 <errmsg>)/;
 error 29;
 reap;
 flush tables;
@@ -49,7 +49,7 @@ exec rm -r $MYSQLTEST_VARDIR/tmp/foo;
 exec ln -s $datadir/mysql $MYSQLTEST_VARDIR/tmp/foo;
 set debug_sync='now SIGNAL run';
 connection default;
-replace_regex / '.*\/test\// '.\/test\// /31/20/;
+replace_regex / '.*\/test\// '.\/test\// /31/20/ /40/20/ /20.*/20 <errmsg>)/;
 error ER_FILE_NOT_FOUND;
 reap;
 flush tables;

sql/handler.cc

@@ -3372,6 +3372,7 @@ void handler::print_error(int error, myf errflag)
     break;
   case ENOENT:
   case ENOTDIR:
+  case ELOOP:
     textno=ER_FILE_NOT_FOUND;
     break;
   case ENOSPC: