mirror of
https://github.com/minio/minio.git
synced 2024-12-25 14:45:54 -05:00
72 lines
2.0 KiB
Go
72 lines
2.0 KiB
Go
/*
|
|
* Minio Cloud Storage, (C) 2016 Minio, Inc.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"os"
|
|
"syscall"
|
|
)
|
|
|
|
// Make sure that none of the other processes are listening on the
|
|
// specified port on any of the interfaces.
|
|
//
|
|
// On linux if a process is listening on 127.0.0.1:9000 then Listen()
|
|
// on ":9000" fails with the error "port already in use".
|
|
// However on Mac OSX Listen() on ":9000" falls back to the IPv6 address.
|
|
// This causes confusion on Mac OSX that minio server is not reachable
|
|
// on 127.0.0.1 even though minio server is running. So before we start
|
|
// the minio server we make sure that the port is free on each tcp network.
|
|
func checkPortAvailability(port int) error {
|
|
network := [3]string{"tcp", "tcp4", "tcp6"}
|
|
for _, n := range network {
|
|
l, err := net.Listen(n, fmt.Sprintf(":%d", port))
|
|
if err != nil {
|
|
if isAddrInUse(err) {
|
|
// Return error if another process is listening on the
|
|
// same port.
|
|
return err
|
|
}
|
|
// Ignore any other error (ex. EAFNOSUPPORT)
|
|
continue
|
|
}
|
|
|
|
// look for error so we don't have dangling connection
|
|
if err = l.Close(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Return true if err is "address already in use" error.
|
|
// syscall.EADDRINUSE is available on all OSes.
|
|
func isAddrInUse(err error) bool {
|
|
if opErr, ok := err.(*net.OpError); ok {
|
|
if sysErr, ok := opErr.Err.(*os.SyscallError); ok {
|
|
if errno, ok := sysErr.Err.(syscall.Errno); ok {
|
|
if errno == syscall.EADDRINUSE {
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false
|
|
}
|