diff options
Diffstat (limited to 'vendor/github.com/opencontainers/runc/libcontainer/utils')
3 files changed, 0 insertions, 264 deletions
diff --git a/vendor/github.com/opencontainers/runc/libcontainer/utils/cmsg.go b/vendor/github.com/opencontainers/runc/libcontainer/utils/cmsg.go deleted file mode 100644 index c8a9364d5..000000000 --- a/vendor/github.com/opencontainers/runc/libcontainer/utils/cmsg.go +++ /dev/null @@ -1,93 +0,0 @@ -// +build linux - -package utils - -/* - * Copyright 2016, 2017 SUSE LLC - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -import ( - "fmt" - "os" - - "golang.org/x/sys/unix" -) - -// MaxSendfdLen is the maximum length of the name of a file descriptor being -// sent using SendFd. The name of the file handle returned by RecvFd will never -// be larger than this value. -const MaxNameLen = 4096 - -// oobSpace is the size of the oob slice required to store a single FD. Note -// that unix.UnixRights appears to make the assumption that fd is always int32, -// so sizeof(fd) = 4. -var oobSpace = unix.CmsgSpace(4) - -// RecvFd waits for a file descriptor to be sent over the given AF_UNIX -// socket. The file name of the remote file descriptor will be recreated -// locally (it is sent as non-auxiliary data in the same payload). -func RecvFd(socket *os.File) (*os.File, error) { - // For some reason, unix.Recvmsg uses the length rather than the capacity - // when passing the msg_controllen and other attributes to recvmsg. So we - // have to actually set the length. - name := make([]byte, MaxNameLen) - oob := make([]byte, oobSpace) - - sockfd := socket.Fd() - n, oobn, _, _, err := unix.Recvmsg(int(sockfd), name, oob, 0) - if err != nil { - return nil, err - } - - if n >= MaxNameLen || oobn != oobSpace { - return nil, fmt.Errorf("recvfd: incorrect number of bytes read (n=%d oobn=%d)", n, oobn) - } - - // Truncate. - name = name[:n] - oob = oob[:oobn] - - scms, err := unix.ParseSocketControlMessage(oob) - if err != nil { - return nil, err - } - if len(scms) != 1 { - return nil, fmt.Errorf("recvfd: number of SCMs is not 1: %d", len(scms)) - } - scm := scms[0] - - fds, err := unix.ParseUnixRights(&scm) - if err != nil { - return nil, err - } - if len(fds) != 1 { - return nil, fmt.Errorf("recvfd: number of fds is not 1: %d", len(fds)) - } - fd := uintptr(fds[0]) - - return os.NewFile(fd, string(name)), nil -} - -// SendFd sends a file descriptor over the given AF_UNIX socket. In -// addition, the file.Name() of the given file will also be sent as -// non-auxiliary data in the same payload (allowing to send contextual -// information for a file descriptor). -func SendFd(socket *os.File, name string, fd uintptr) error { - if len(name) >= MaxNameLen { - return fmt.Errorf("sendfd: filename too long: %s", name) - } - oob := unix.UnixRights(int(fd)) - return unix.Sendmsg(int(socket.Fd()), []byte(name), oob, nil, 0) -} diff --git a/vendor/github.com/opencontainers/runc/libcontainer/utils/utils.go b/vendor/github.com/opencontainers/runc/libcontainer/utils/utils.go deleted file mode 100644 index baa54c9ba..000000000 --- a/vendor/github.com/opencontainers/runc/libcontainer/utils/utils.go +++ /dev/null @@ -1,127 +0,0 @@ -package utils - -import ( - "crypto/rand" - "encoding/hex" - "encoding/json" - "io" - "os" - "path/filepath" - "strings" - "unsafe" - - "golang.org/x/sys/unix" -) - -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 - } - if size > 64 { - size = 64 - } - 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) -} - -// ExitStatus returns the correct exit status for a process based on if it -// was signaled or exited cleanly -func ExitStatus(status unix.WaitStatus) int { - if status.Signaled() { - return exitSignalOffset + int(status.Signal()) - } - return status.ExitStatus() -} - -// WriteJSON writes the provided struct v to w using standard json marshaling -func WriteJSON(w io.Writer, v interface{}) error { - data, err := json.Marshal(v) - if err != nil { - return err - } - _, err = w.Write(data) - return err -} - -// CleanPath makes a path safe for use with filepath.Join. This is done by not -// only cleaning the path, but also (if the path is relative) adding a leading -// '/' and cleaning it (then removing the leading '/'). This ensures that a -// path resulting from prepending another path will always resolve to lexically -// be a subdirectory of the prefixed path. This is all done lexically, so paths -// that include symlinks won't be safe as a result of using CleanPath. -func CleanPath(path string) string { - // Deal with empty strings nicely. - if path == "" { - return "" - } - - // Ensure that all paths are cleaned (especially problematic ones like - // "/../../../../../" which can cause lots of issues). - path = filepath.Clean(path) - - // If the path isn't absolute, we need to do more processing to fix paths - // such as "../../../../<etc>/some/path". We also shouldn't convert absolute - // paths to relative ones. - if !filepath.IsAbs(path) { - path = filepath.Clean(string(os.PathSeparator) + path) - // This can't fail, as (by definition) all paths are relative to root. - path, _ = filepath.Rel(string(os.PathSeparator), path) - } - - // Clean the path again for good measure. - return filepath.Clean(path) -} - -// SearchLabels searches a list of key-value pairs for the provided key and -// returns the corresponding value. The pairs must be separated with '='. -func SearchLabels(labels []string, query string) string { - for _, l := range labels { - parts := strings.SplitN(l, "=", 2) - if len(parts) < 2 { - continue - } - if parts[0] == query { - return parts[1] - } - } - return "" -} - -// Annotations returns the bundle path and user defined annotations from the -// libcontainer state. We need to remove the bundle because that is a label -// added by libcontainer. -func Annotations(labels []string) (bundle string, userAnnotations map[string]string) { - userAnnotations = make(map[string]string) - for _, l := range labels { - parts := strings.SplitN(l, "=", 2) - if len(parts) < 2 { - continue - } - if parts[0] == "bundle" { - bundle = parts[1] - } else { - userAnnotations[parts[0]] = parts[1] - } - } - return -} - -func GetIntSize() int { - return int(unsafe.Sizeof(1)) -} diff --git a/vendor/github.com/opencontainers/runc/libcontainer/utils/utils_unix.go b/vendor/github.com/opencontainers/runc/libcontainer/utils/utils_unix.go deleted file mode 100644 index c96088988..000000000 --- a/vendor/github.com/opencontainers/runc/libcontainer/utils/utils_unix.go +++ /dev/null @@ -1,44 +0,0 @@ -// +build !windows - -package utils - -import ( - "io/ioutil" - "os" - "strconv" - - "golang.org/x/sys/unix" -) - -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 unix.CloseOnExec - unix.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 -} - -// NewSockPair returns a new unix socket pair -func NewSockPair(name string) (parent *os.File, child *os.File, err error) { - fds, err := unix.Socketpair(unix.AF_LOCAL, unix.SOCK_STREAM|unix.SOCK_CLOEXEC, 0) - if err != nil { - return nil, nil, err - } - return os.NewFile(uintptr(fds[1]), name+"-p"), os.NewFile(uintptr(fds[0]), name+"-c"), nil -} |