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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// +build linux
package fdtrack
import (
"io"
"os"
"syscall"
)
func fdlimit() int {
var nofile syscall.Rlimit
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &nofile); err != nil {
return 0
}
return int(nofile.Cur)
}
func fdusage() (int, error) {
f, err := os.Open("/proc/self/fd")
if err != nil {
return 0, err
}
defer f.Close()
const batchSize = 100
n := 0
for {
list, err := f.Readdirnames(batchSize)
n += len(list)
if err == io.EOF {
break
} else if err != nil {
return 0, err
}
}
return n, nil
}
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