mirror of
https://github.com/containerd/containerd.git
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43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"fmt"
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"log"
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"net"
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"github.com/vishvananda/netlink"
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)
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// isLoInterfaceUp validates whether the lo interface is up
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func isLoInterfaceUp() (bool, error) {
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link, err := netlink.LinkByName("lo")
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if err != nil {
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return false, fmt.Errorf("could not find interface lo: %w", err)
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}
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return link.Attrs().Flags&net.FlagUp != 0, nil
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}
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func main() {
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up, err := isLoInterfaceUp()
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if err != nil {
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log.Fatalf("could not check lo interface status: %v", err)
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}
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fmt.Printf("Loopback interface is %s\n", map[bool]string{true: "UP", false: "DOWN"}[up])
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}
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