82 lines
1.6 KiB
Go
82 lines
1.6 KiB
Go
// +build darwin dragonfly freebsd linux netbsd openbsd solaris
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// Functions shared between linux/darwin.
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package allocdir
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import (
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"fmt"
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"os"
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"os/user"
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"path/filepath"
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"strconv"
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"golang.org/x/sys/unix"
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)
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var (
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//Path inside container for mounted directory shared across tasks in a task group.
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SharedAllocContainerPath = filepath.Join("/", SharedAllocName)
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//Path inside container for mounted directory for local storage.
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TaskLocalContainerPath = filepath.Join("/", TaskLocal)
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)
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func (d *AllocDir) linkOrCopy(src, dst string, perm os.FileMode) error {
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// Attempt to hardlink.
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if err := os.Link(src, dst); err == nil {
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return nil
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}
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return fileCopy(src, dst, perm)
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}
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func (d *AllocDir) dropDirPermissions(path string) error {
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// Can't do anything if not root.
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if unix.Geteuid() != 0 {
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return nil
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}
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u, err := user.Lookup("nobody")
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if err != nil {
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return err
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}
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uid, err := getUid(u)
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if err != nil {
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return err
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}
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gid, err := getGid(u)
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if err != nil {
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return err
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}
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if err := os.Chown(path, uid, gid); err != nil {
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return fmt.Errorf("Couldn't change owner/group of %v to (uid: %v, gid: %v): %v", path, uid, gid, err)
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}
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if err := os.Chmod(path, 0777); err != nil {
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return fmt.Errorf("Chmod(%v) failed: %v", path, err)
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}
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return nil
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}
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func getUid(u *user.User) (int, error) {
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uid, err := strconv.Atoi(u.Uid)
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if err != nil {
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return 0, fmt.Errorf("Unable to convert Uid to an int: %v", err)
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}
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return uid, nil
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}
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func getGid(u *user.User) (int, error) {
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gid, err := strconv.Atoi(u.Gid)
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if err != nil {
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return 0, fmt.Errorf("Unable to convert Gid to an int: %v", err)
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}
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return gid, nil
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}
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