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pkg/mount: include optional field

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one linux, the optional field designates the sharedsubtree information,
if any.

Signed-off-by: Vincent Batts <vbatts@redhat.com>
This commit is contained in:
Vincent Batts 2014-11-03 22:05:04 -05:00
parent 5b03a21963
commit 91b4ac320f
2 changed files with 12 additions and 7 deletions
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2
pkg/mount/mountinfo.go
View file

@ -2,6 +2,6 @@ package mount
type MountInfo struct {
Id, Parent, Major, Minor int
Root, Mountpoint, Opts string
Root, Mountpoint, Opts, Optional string
Fstype, Source, VfsOpts string
}

9
pkg/mount/mountinfo_linux.go
View file

@ -23,7 +23,7 @@ const (
(9) filesystem type: name of filesystem of the form "type[.subtype]"
(10) mount source: filesystem specific information or "none"
(11) super options: per super block options*/
mountinfoFormat = "%d %d %d:%d %s %s %s "
mountinfoFormat = "%d %d %d:%d %s %s %s %s"
)
// Parse /proc/self/mountinfo because comparing Dev and ino does not work from bind mounts
@ -51,11 +51,12 @@ func parseInfoFile(r io.Reader) ([]*MountInfo, error) {
var (
p = &MountInfo{}
text = s.Text()
optionalFields string
)
if _, err := fmt.Sscanf(text, mountinfoFormat,
&p.Id, &p.Parent, &p.Major, &p.Minor,
&p.Root, &p.Mountpoint, &p.Opts); err != nil {
&p.Root, &p.Mountpoint, &p.Opts, &optionalFields); err != nil {
return nil, fmt.Errorf("Scanning '%s' failed: %s", text, err)
}
// Safe as mountinfo encodes mountpoints with spaces as \040.
@ -65,6 +66,10 @@ func parseInfoFile(r io.Reader) ([]*MountInfo, error) {
return nil, fmt.Errorf("Error found less than 3 fields post '-' in %q", text)
}
if optionalFields != "-" {
p.Optional = optionalFields
}
p.Fstype = postSeparatorFields[0]
p.Source = postSeparatorFields[1]
p.VfsOpts = strings.Join(postSeparatorFields[2:], " ")