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make_listener_posix.go
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/
make_listener_posix.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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
package api
import (
"errors"
"fmt"
"net"
"os"
"github.com/elastic/elastic-agent-libs/api/npipe"
)
func makeListener(cfg Config) (net.Listener, error) {
if len(cfg.User) > 0 {
return nil, errors.New("specifying a user is not supported under this platform")
}
if len(cfg.SecurityDescriptor) > 0 {
return nil, errors.New("security_descriptor option for the HTTP endpoint only work on Windows")
}
if npipe.IsNPipe(cfg.Host) {
return nil, fmt.Errorf("cannot use %s as the host, named pipes are only supported on Windows", cfg.Host)
}
network, path, err := parse(cfg.Host, cfg.Port)
if err != nil {
return nil, err
}
if network == unixNetwork {
if _, err := os.Stat(path); !os.IsNotExist(err) {
if err := os.Remove(path); err != nil {
return nil, fmt.Errorf("cannot remove existing unix socket file at location %s: %w", path, err)
}
}
}
l, err := net.Listen(network, path)
if err != nil {
return nil, err
}
// Ensure file mode
if network == unixNetwork {
if err := os.Chmod(path, socketFileMode); err != nil {
return nil, fmt.Errorf("could not set mode %d for unix socket file at location %s: %w",
socketFileMode,
path,
err,
)
}
}
return l, nil
}