51 lines
1.6 KiB
Go
51 lines
1.6 KiB
Go
// 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/>.
|
|
|
|
// +build linux darwin netbsd openbsd solaris
|
|
|
|
package utils
|
|
|
|
import "syscall"
|
|
|
|
// raiseFdLimit tries to maximize the file descriptor allowance of this process
|
|
// to the maximum hard-limit allowed by the OS.
|
|
func raiseFdLimit(max uint64) error {
|
|
// Get the current limit
|
|
var limit syscall.Rlimit
|
|
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
|
|
return err
|
|
}
|
|
// Try to update the limit to the max allowance
|
|
limit.Cur = limit.Max
|
|
if limit.Cur > max {
|
|
limit.Cur = max
|
|
}
|
|
if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// getFdLimit retrieves the number of file descriptors allowed to be opened by this
|
|
// process.
|
|
func getFdLimit() (int, error) {
|
|
var limit syscall.Rlimit
|
|
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &limit); err != nil {
|
|
return 0, err
|
|
}
|
|
return int(limit.Cur), nil
|
|
}
|