github.com/rkt/rkt@v1.30.1-0.20200224141603-171c416fac02/pkg/fs/mount_linux.go (about) 1 // Copyright 2016 The rkt Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 //+build linux 16 17 package fs 18 19 import ( 20 "strings" 21 "syscall" 22 ) 23 24 // String returns a human readable representation of mountFlags based on which bits are set. 25 // E.g. for a value of syscall.MS_RDONLY|syscall.MS_BIND it will print "MS_RDONLY|MS_BIND" 26 func (f mountFlags) String() string { 27 var s []string 28 29 maybeAppendFlag := func(ff uintptr, desc string) { 30 if uintptr(f)&ff != 0 { 31 s = append(s, desc) 32 } 33 } 34 35 maybeAppendFlag(syscall.MS_DIRSYNC, "MS_DIRSYNC") 36 maybeAppendFlag(syscall.MS_MANDLOCK, "MS_MANDLOCK") 37 maybeAppendFlag(syscall.MS_NOATIME, "MS_NOATIME") 38 maybeAppendFlag(syscall.MS_NODEV, "MS_NODEV") 39 maybeAppendFlag(syscall.MS_NODIRATIME, "MS_NODIRATIME") 40 maybeAppendFlag(syscall.MS_NOEXEC, "MS_NOEXEC") 41 maybeAppendFlag(syscall.MS_NOSUID, "MS_NOSUID") 42 maybeAppendFlag(syscall.MS_RDONLY, "MS_RDONLY") 43 maybeAppendFlag(syscall.MS_REC, "MS_REC") 44 maybeAppendFlag(syscall.MS_RELATIME, "MS_RELATIME") 45 maybeAppendFlag(syscall.MS_SILENT, "MS_SILENT") 46 maybeAppendFlag(syscall.MS_STRICTATIME, "MS_STRICTATIME") 47 maybeAppendFlag(syscall.MS_SYNCHRONOUS, "MS_SYNCHRONOUS") 48 maybeAppendFlag(syscall.MS_REMOUNT, "MS_REMOUNT") 49 maybeAppendFlag(syscall.MS_BIND, "MS_BIND") 50 maybeAppendFlag(syscall.MS_SHARED, "MS_SHARED") 51 maybeAppendFlag(syscall.MS_PRIVATE, "MS_PRIVATE") 52 maybeAppendFlag(syscall.MS_SLAVE, "MS_SLAVE") 53 maybeAppendFlag(syscall.MS_UNBINDABLE, "MS_UNBINDABLE") 54 maybeAppendFlag(syscall.MS_MOVE, "MS_MOVE") 55 56 return strings.Join(s, "|") 57 }