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options.go
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options.go
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package fuse
import (
"errors"
"strings"
)
// MountConfig holds the configuration for a mount operation.
// Use it by passing MountOption values to Mount.
type MountConfig struct {
options map[string]string
}
func escapeComma(s string) string {
s = strings.Replace(s, `\`, `\\`, -1)
s = strings.Replace(s, `,`, `\,`, -1)
return s
}
// getOptions makes a string of options suitable for passing to FUSE
// mount flag `-o`. Returns an empty string if no options were set.
// Any platform specific adjustments should happen before the call.
func (m *MountConfig) getOptions() string {
var opts []string
for k, v := range m.options {
k = escapeComma(k)
if v != "" {
k += "=" + escapeComma(v)
}
opts = append(opts, k)
}
return strings.Join(opts, ",")
}
// MountOption is passed to Mount to change the behavior of the mount.
type MountOption func(*MountConfig) error
// FSName sets the file system name (also called source) that is
// visible in the list of mounted file systems.
func FSName(name string) MountOption {
return func(conf *MountConfig) error {
conf.options["fsname"] = name
return nil
}
}
// Subtype sets the subtype of the mount. The main type is always
// `fuse`. The type in a list of mounted file systems will look like
// `fuse.foo`.
//
// OS X ignores this option.
func Subtype(fstype string) MountOption {
return func(conf *MountConfig) error {
conf.options["subtype"] = fstype
return nil
}
}
// LocalVolume sets the volume to be local (instead of network),
// changing the behavior of Finder, Spotlight, and such.
//
// OS X only. Others ignore this option.
func LocalVolume() MountOption {
return localVolume
}
// VolumeName sets the volume name shown in Finder.
//
// OS X only. Others ignore this option.
func VolumeName(name string) MountOption {
return volumeName(name)
}
var ErrCannotCombineAllowOtherAndAllowRoot = errors.New("cannot combine AllowOther and AllowRoot")
// AllowOther allows other users to access the file system.
//
// Only one of AllowOther or AllowRoot can be used.
func AllowOther() MountOption {
return func(conf *MountConfig) error {
if _, ok := conf.options["allow_root"]; ok {
return ErrCannotCombineAllowOtherAndAllowRoot
}
conf.options["allow_other"] = ""
return nil
}
}
// AllowRoot allows other users to access the file system.
//
// Only one of AllowOther or AllowRoot can be used.
func AllowRoot() MountOption {
return func(conf *MountConfig) error {
if _, ok := conf.options["allow_other"]; ok {
return ErrCannotCombineAllowOtherAndAllowRoot
}
conf.options["allow_root"] = ""
return nil
}
}