1 // Copyright 2018 The Prometheus Authors 2 // Licensed under the Apache License, Version 2.0 (the "License"); 3 // you may not use this file except in compliance with the License. 4 // You may obtain a copy of the License at 5 // 6 // http://www.apache.org/licenses/LICENSE-2.0 7 // 8 // Unless required by applicable law or agreed to in writing, software 9 // distributed under the License is distributed on an "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 // See the License for the specific language governing permissions and 12 // limitations under the License. 13 14 package procfs 15 16 import ( 17 "github.com/prometheus/procfs/internal/fs" 18 ) 19 20 // FS represents the pseudo-filesystem sys, which provides an interface to 21 // kernel data structures. 22 type FS struct { 23 proc fs.FS 24 isReal bool 25 } 26 27 // DefaultMountPoint is the common mount point of the proc filesystem. 28 const DefaultMountPoint = fs.DefaultProcMountPoint 29 30 // NewDefaultFS returns a new proc FS mounted under the default proc mountPoint. 31 // It will error if the mount point directory can't be read or is a file. 32 func NewDefaultFS() (FS, error) { 33 return NewFS(DefaultMountPoint) 34 } 35 36 // NewFS returns a new proc FS mounted under the given proc mountPoint. It will error 37 // if the mount point directory can't be read or is a file. 38 func NewFS(mountPoint string) (FS, error) { 39 fs, err := fs.NewFS(mountPoint) 40 if err != nil { 41 return FS{}, err 42 } 43 44 isReal, err := isRealProc(mountPoint) 45 if err != nil { 46 return FS{}, err 47 } 48 49 return FS{fs, isReal}, nil 50 } 51