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linux.go
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linux.go
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !windows
// +build !windows
package healthchecks
import (
"errors"
"net"
"os/exec"
"syscall"
)
func isSubagentActive(subagent string) (bool, error) {
_, err := exec.Command("systemctl", "is-active", "--quiet", subagent).Output()
if err != nil {
// if the unit is not active return false with no error
if exiterr, ok := err.(*exec.ExitError); ok && exiterr.ProcessState.ExitCode() == 3 {
return false, nil
}
return false, err
}
return true, nil
}
func isPortUnavailableError(err error) bool {
return errors.Is(err, syscall.EADDRINUSE)
}
func isTimeoutError(err error) bool {
if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
return true
}
if errors.Is(err, syscall.ETIMEDOUT) {
return true
}
return false
}
func isConnectionRefusedError(err error) bool {
return errors.Is(err, syscall.ECONNREFUSED)
}