common/fdlimit: Move fdlimit files to separate package (#15850)

* common/fdlimit: Move fdlimit files to separate package

When go-ethereum is used as a library the calling program need to set
the FD limit.

This commit extract fdlimit files to a separate package so it can be
used outside of go-ethereum.

* common/fdlimit: Remove FdLimit from functions signature

* common/fdlimit: Rename fdlimit functions

1 files changed, 0 insertions, 45 deletions

diff --git a/cmd/utils/fdlimit_test.go b/cmd/utils/fdlimit_test.go
deleted file mode 100644
index 48489cf4c..000000000
--- a/cmd/utils/fdlimit_test.go
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2016 The go-ethereum Authors
-// This file is part of go-ethereum.
-//
-// go-ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// go-ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
-
-package utils
-
-import (
-	"fmt"
-	"testing"
-)
-
-// TestFileDescriptorLimits simply tests whether the file descriptor allowance
-// per this process can be retrieved.
-func TestFileDescriptorLimits(t *testing.T) {
-	target := 4096
-	hardlimit, err := getFdMaxLimit()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if hardlimit < target {
-		t.Skip(fmt.Sprintf("system limit is less than desired test target: %d < %d", hardlimit, target))
-	}
-
-	if limit, err := getFdLimit(); err != nil || limit <= 0 {
-		t.Fatalf("failed to retrieve file descriptor limit (%d): %v", limit, err)
-	}
-	if err := raiseFdLimit(uint64(target)); err != nil {
-		t.Fatalf("failed to raise file allowance")
-	}
-	if limit, err := getFdLimit(); err != nil || limit < target {
-		t.Fatalf("failed to retrieve raised descriptor limit (have %v, want %v): %v", limit, target, err)
-	}
-}