| //go:build !windows |
| // +build !windows |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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. |
| */ |
| |
| package os |
| |
| import ( |
| "fmt" |
| "runtime" |
| ) |
| |
| import ( |
| "golang.org/x/sys/unix" |
| ) |
| |
| func setFileLimit(n uint64) error { |
| limit := unix.Rlimit{ |
| Cur: n, |
| Max: n, |
| } |
| |
| if err := unix.Setrlimit(unix.RLIMIT_NOFILE, &limit); err != nil { |
| return fmt.Errorf("failed to set open file limit to %d: %w", limit.Cur, err) |
| } |
| |
| return nil |
| } |
| |
| // RaiseFileLimit raises the soft open file limit to match the hard limit. |
| func RaiseFileLimit() error { |
| limit := unix.Rlimit{} |
| if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &limit); err != nil { |
| return fmt.Errorf("failed to query open file limits: %w", err) |
| } |
| |
| // Darwin sets the max to unlimited, but it is actually limited |
| // (typically to 24K) by the "kern.maxfilesperproc" systune. |
| // Since we only run on Darwin for test purposes, just clip this |
| // to a reasonable value. |
| if runtime.GOOS == "darwin" && limit.Max > 10240 { |
| limit.Max = 10240 |
| } |
| |
| return setFileLimit(limit.Max) |
| } |
| |
| // CurrentFileLimit reports the current soft open file limit. |
| func CurrentFileLimit() (uint64, error) { |
| limit := unix.Rlimit{} |
| if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &limit); err != nil { |
| return 0, fmt.Errorf("failed to query open file limits: %w", err) |
| } |
| |
| return limit.Cur, nil |
| } |