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94 lines
2.7 KiB
Go
94 lines
2.7 KiB
Go
package mount
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import (
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"sort"
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"strings"
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"github.com/sirupsen/logrus"
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)
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// GetMounts retrieves a list of mounts for the current running process.
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func GetMounts() ([]*Info, error) {
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return parseMountTable()
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}
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// Mounted determines if a specified mountpoint has been mounted.
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// On Linux it looks at /proc/self/mountinfo.
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func Mounted(mountpoint string) (bool, error) {
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entries, err := parseMountTable()
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if err != nil {
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return false, err
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}
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// Search the table for the mountpoint
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for _, e := range entries {
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if e.Mountpoint == mountpoint {
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return true, nil
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}
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}
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return false, nil
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}
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// Mount will mount filesystem according to the specified configuration, on the
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// condition that the target path is *not* already mounted. Options must be
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// specified like the mount or fstab unix commands: "opt1=val1,opt2=val2". See
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// flags.go for supported option flags.
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func Mount(device, target, mType, options string) error {
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flag, _ := parseOptions(options)
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if flag&REMOUNT != REMOUNT {
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if mounted, err := Mounted(target); err != nil || mounted {
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return err
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}
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}
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return ForceMount(device, target, mType, options)
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}
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// ForceMount will mount a filesystem according to the specified configuration,
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// *regardless* if the target path is not already mounted. Options must be
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// specified like the mount or fstab unix commands: "opt1=val1,opt2=val2". See
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// flags.go for supported option flags.
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func ForceMount(device, target, mType, options string) error {
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flag, data := parseOptions(options)
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return mount(device, target, mType, uintptr(flag), data)
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}
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// Unmount lazily unmounts a filesystem on supported platforms, otherwise
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// does a normal unmount.
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func Unmount(target string) error {
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if mounted, err := Mounted(target); err != nil || !mounted {
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return err
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}
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return unmount(target, mntDetach)
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}
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// RecursiveUnmount unmounts the target and all mounts underneath, starting with
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// the deepsest mount first.
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func RecursiveUnmount(target string) error {
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mounts, err := GetMounts()
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if err != nil {
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return err
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}
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// Make the deepest mount be first
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sort.Sort(sort.Reverse(byMountpoint(mounts)))
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for i, m := range mounts {
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if !strings.HasPrefix(m.Mountpoint, target) {
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continue
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}
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logrus.Debugf("Trying to unmount %s", m.Mountpoint)
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err = Unmount(m.Mountpoint)
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if err != nil && i == len(mounts)-1 {
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if mounted, err := Mounted(m.Mountpoint); err != nil || mounted {
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return err
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}
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// Ignore errors for submounts and continue trying to unmount others
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// The final unmount should fail if there ane any submounts remaining
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} else if err != nil {
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logrus.Errorf("Failed to unmount %s: %v", m.Mountpoint, err)
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} else if err == nil {
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logrus.Debugf("Unmounted %s", m.Mountpoint)
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}
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}
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return nil
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}
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