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52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
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package fstestutil
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import (
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"errors"
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"io/ioutil"
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"strings"
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)
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// Linux /proc/mounts shows current mounts.
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// Same format as /etc/fstab. Quoting getmntent(3):
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//
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// Since fields in the mtab and fstab files are separated by whitespace,
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// octal escapes are used to represent the four characters space (\040),
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// tab (\011), newline (\012) and backslash (\134) in those files when
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// they occur in one of the four strings in a mntent structure.
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//
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// http://linux.die.net/man/3/getmntent
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var fstabUnescape = strings.NewReplacer(
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`\040`, "\040",
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`\011`, "\011",
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`\012`, "\012",
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`\134`, "\134",
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)
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var errNotFound = errors.New("mount not found")
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func getMountInfo(mnt string) (*MountInfo, error) {
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data, err := ioutil.ReadFile("/proc/mounts")
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if err != nil {
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return nil, err
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}
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for _, line := range strings.Split(string(data), "\n") {
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fields := strings.Fields(line)
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if len(fields) < 3 {
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continue
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}
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// Fields are: fsname dir type opts freq passno
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fsname := fstabUnescape.Replace(fields[0])
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dir := fstabUnescape.Replace(fields[1])
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fstype := fstabUnescape.Replace(fields[2])
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if mnt == dir {
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info := &MountInfo{
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FSName: fsname,
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Type: fstype,
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}
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return info, nil
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}
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}
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return nil, errNotFound
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}
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