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moby--moby/pkg/fileutils/fileutils_unix.go

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// +build linux freebsd
package fileutils
import (
"fmt"
"io/ioutil"
"os"
"github.com/sirupsen/logrus"
)
// GetTotalUsedFds Returns the number of used File Descriptors by
// reading it via /proc filesystem.
func GetTotalUsedFds() int {
if fds, err := ioutil.ReadDir(fmt.Sprintf("/proc/%d/fd", os.Getpid())); err != nil {
logrus.Errorf("Error opening /proc/%d/fd: %s", os.Getpid(), err)
} else {
return len(fds)
}
return -1
}