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Updated godeps

Signed-off-by: Jana Radhakrishnan <mrjana@docker.com>
This commit is contained in:
Jana Radhakrishnan 2015-04-13 18:41:51 +00:00
parent 68ae284db5
commit 53c755b79d
5 changed files with 203 additions and 1 deletions

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@ -1,12 +1,20 @@
{
"ImportPath": "github.com/docker/libnetwork",
"GoVersion": "go1.2.1",
"GoVersion": "go1.4.2",
"Packages": [
"./..."
],
"Deps": [
{
"ImportPath": "github.com/Sirupsen/logrus",
"Comment": "v0.6.4-12-g467d9d5",
"Rev": "467d9d55c2d2c17248441a8fc661561161f40d5e"
},
{
"ImportPath": "github.com/docker/docker/pkg/common",
"Comment": "v1.4.1-1379-g8e107a9",
"Rev": "8e107a93210c54f22ec1354d969c771b1abfbe05"
},
{
"ImportPath": "github.com/docker/docker/pkg/iptables",
"Comment": "v1.4.1-2492-ge690ad9",
@ -27,6 +35,11 @@
"Comment": "v1.4.1-2492-ge690ad9",
"Rev": "e690ad92925a045344bde8d2d59d7a7f602dded6"
},
{
"ImportPath": "github.com/docker/libcontainer/utils",
"Comment": "v1.4.0-324-g88989e6",
"Rev": "88989e66d3a1ab960deb37f3dd7f824d85e1b9bc"
},
{
"ImportPath": "github.com/vishvananda/netlink",
"Rev": "8eb64238879fed52fd51c5b30ad20b928fb4c36c"

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@ -0,0 +1,47 @@
package common
import (
"crypto/rand"
"encoding/hex"
"io"
"strconv"
)
// TruncateID returns a shorthand version of a string identifier for convenience.
// A collision with other shorthands is very unlikely, but possible.
// In case of a collision a lookup with TruncIndex.Get() will fail, and the caller
// will need to use a langer prefix, or the full-length Id.
func TruncateID(id string) string {
shortLen := 12
if len(id) < shortLen {
shortLen = len(id)
}
return id[:shortLen]
}
// GenerateRandomID returns an unique id
func GenerateRandomID() string {
for {
id := make([]byte, 32)
if _, err := io.ReadFull(rand.Reader, id); err != nil {
panic(err) // This shouldn't happen
}
value := hex.EncodeToString(id)
// if we try to parse the truncated for as an int and we don't have
// an error then the value is all numberic and causes issues when
// used as a hostname. ref #3869
if _, err := strconv.ParseInt(TruncateID(value), 10, 64); err == nil {
continue
}
return value
}
}
func RandomString() string {
id := make([]byte, 32)
if _, err := io.ReadFull(rand.Reader, id); err != nil {
panic(err) // This shouldn't happen
}
return hex.EncodeToString(id)
}

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@ -0,0 +1,59 @@
package common
import (
"testing"
)
func TestShortenId(t *testing.T) {
id := GenerateRandomID()
truncID := TruncateID(id)
if len(truncID) != 12 {
t.Fatalf("Id returned is incorrect: truncate on %s returned %s", id, truncID)
}
}
func TestShortenIdEmpty(t *testing.T) {
id := ""
truncID := TruncateID(id)
if len(truncID) > len(id) {
t.Fatalf("Id returned is incorrect: truncate on %s returned %s", id, truncID)
}
}
func TestShortenIdInvalid(t *testing.T) {
id := "1234"
truncID := TruncateID(id)
if len(truncID) != len(id) {
t.Fatalf("Id returned is incorrect: truncate on %s returned %s", id, truncID)
}
}
func TestGenerateRandomID(t *testing.T) {
id := GenerateRandomID()
if len(id) != 64 {
t.Fatalf("Id returned is incorrect: %s", id)
}
}
func TestRandomString(t *testing.T) {
id := RandomString()
if len(id) != 64 {
t.Fatalf("Id returned is incorrect: %s", id)
}
}
func TestRandomStringUniqueness(t *testing.T) {
repeats := 25
set := make(map[string]struct{}, repeats)
for i := 0; i < repeats; i = i + 1 {
id := RandomString()
if len(id) != 64 {
t.Fatalf("Id returned is incorrect: %s", id)
}
if _, ok := set[id]; ok {
t.Fatalf("Random number is repeated")
}
set[id] = struct{}{}
}
}

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@ -0,0 +1,68 @@
package utils
import (
"crypto/rand"
"encoding/hex"
"io"
"io/ioutil"
"path/filepath"
"strconv"
"syscall"
)
const (
exitSignalOffset = 128
)
// GenerateRandomName returns a new name joined with a prefix. This size
// specified is used to truncate the randomly generated value
func GenerateRandomName(prefix string, size int) (string, error) {
id := make([]byte, 32)
if _, err := io.ReadFull(rand.Reader, id); err != nil {
return "", err
}
return prefix + hex.EncodeToString(id)[:size], nil
}
// ResolveRootfs ensures that the current working directory is
// not a symlink and returns the absolute path to the rootfs
func ResolveRootfs(uncleanRootfs string) (string, error) {
rootfs, err := filepath.Abs(uncleanRootfs)
if err != nil {
return "", err
}
return filepath.EvalSymlinks(rootfs)
}
func CloseExecFrom(minFd int) error {
fdList, err := ioutil.ReadDir("/proc/self/fd")
if err != nil {
return err
}
for _, fi := range fdList {
fd, err := strconv.Atoi(fi.Name())
if err != nil {
// ignore non-numeric file names
continue
}
if fd < minFd {
// ignore descriptors lower than our specified minimum
continue
}
// intentionally ignore errors from syscall.CloseOnExec
syscall.CloseOnExec(fd)
// the cases where this might fail are basically file descriptors that have already been closed (including and especially the one that was created when ioutil.ReadDir did the "opendir" syscall)
}
return nil
}
// ExitStatus returns the correct exit status for a process based on if it
// was signaled or existed cleanly.
func ExitStatus(status syscall.WaitStatus) int {
if status.Signaled() {
return exitSignalOffset + int(status.Signal())
}
return status.ExitStatus()
}

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package utils
import "testing"
func TestGenerateName(t *testing.T) {
name, err := GenerateRandomName("veth", 5)
if err != nil {
t.Fatal(err)
}
expected := 5 + len("veth")
if len(name) != 5+len("veth") {
t.Fatalf("expected name to be %d chars but received %d", expected, len(name))
}
}