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// Copyright 2018 The Hugo Authors. All rights reserved.
//
// 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 commands
import (
"syscall"
"github.com/spf13/cobra"
jww "github.com/spf13/jwalterweatherman"
)
var _ cmder = (*limitCmd)(nil)
type limitCmd struct {
*baseCmd
}
func newLimitCmd() *limitCmd {
ccmd := &cobra.Command{
Use: "ulimit",
Short: "Check system ulimit settings",
Long: `Hugo will inspect the current ulimit settings on the system.
This is primarily to ensure that Hugo can watch enough files on some OSs`,
RunE: func(cmd *cobra.Command, args []string) error {
var rLimit syscall.Rlimit
err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
if err != nil {
return newSystemError("Error Getting rlimit ", err)
}
jww.FEEDBACK.Println("Current rLimit:", rLimit)
if rLimit.Cur >= newRlimit {
return nil
}
jww.FEEDBACK.Println("Attempting to increase limit")
rLimit.Cur = newRlimit
err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
if err != nil {
return newSystemError("Error Setting rLimit ", err)
}
err = syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
if err != nil {
return newSystemError("Error Getting rLimit ", err)
}
jww.FEEDBACK.Println("rLimit after change:", rLimit)
return nil
},
}
return &limitCmd{baseCmd: newBaseCmd(ccmd)}
}
const newRlimit = 10240
func tweakLimit() {
var rLimit syscall.Rlimit
err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
if err != nil {
jww.WARN.Println("Unable to get rlimit:", err)
return
}
if rLimit.Cur < newRlimit {
rLimit.Cur = newRlimit
err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
if err != nil {
// This may not succeed, see https://github.com/golang/go/issues/30401
jww.INFO.Println("Unable to increase number of open files limit:", err)
}
}
}
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