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|
package sockaddr
import (
"fmt"
"strings"
)
type UnixSock struct {
SockAddr
path string
}
type UnixSocks []*UnixSock
// unixAttrMap is a map of the UnixSockAddr type-specific attributes.
var unixAttrMap map[AttrName]func(UnixSock) string
var unixAttrs []AttrName
func init() {
unixAttrInit()
}
// NewUnixSock creates an UnixSock from a string path. String can be in the
// form of either URI-based string (e.g. `file:///etc/passwd`), an absolute
// path (e.g. `/etc/passwd`), or a relative path (e.g. `./foo`).
func NewUnixSock(s string) (ret UnixSock, err error) {
ret.path = s
return ret, nil
}
// CmpAddress follows the Cmp() standard protocol and returns:
//
// - -1 If the receiver should sort first because its name lexically sorts before arg
// - 0 if the SockAddr arg is not a UnixSock, or is a UnixSock with the same path.
// - 1 If the argument should sort first.
func (us UnixSock) CmpAddress(sa SockAddr) int {
usb, ok := sa.(UnixSock)
if !ok {
return sortDeferDecision
}
return strings.Compare(us.Path(), usb.Path())
}
// DialPacketArgs returns the arguments required to be passed to net.DialUnix()
// with the `unixgram` network type.
func (us UnixSock) DialPacketArgs() (network, dialArgs string) {
return "unixgram", us.path
}
// DialStreamArgs returns the arguments required to be passed to net.DialUnix()
// with the `unix` network type.
func (us UnixSock) DialStreamArgs() (network, dialArgs string) {
return "unix", us.path
}
// Equal returns true if a SockAddr is equal to the receiving UnixSock.
func (us UnixSock) Equal(sa SockAddr) bool {
usb, ok := sa.(UnixSock)
if !ok {
return false
}
if us.Path() != usb.Path() {
return false
}
return true
}
// ListenPacketArgs returns the arguments required to be passed to
// net.ListenUnixgram() with the `unixgram` network type.
func (us UnixSock) ListenPacketArgs() (network, dialArgs string) {
return "unixgram", us.path
}
// ListenStreamArgs returns the arguments required to be passed to
// net.ListenUnix() with the `unix` network type.
func (us UnixSock) ListenStreamArgs() (network, dialArgs string) {
return "unix", us.path
}
// MustUnixSock is a helper method that must return an UnixSock or panic on
// invalid input.
func MustUnixSock(addr string) UnixSock {
us, err := NewUnixSock(addr)
if err != nil {
panic(fmt.Sprintf("Unable to create a UnixSock from %+q: %v", addr, err))
}
return us
}
// Path returns the given path of the UnixSock
func (us UnixSock) Path() string {
return us.path
}
// String returns the path of the UnixSock
func (us UnixSock) String() string {
return fmt.Sprintf("%+q", us.path)
}
// Type is used as a type switch and returns TypeUnix
func (UnixSock) Type() SockAddrType {
return TypeUnix
}
// UnixSockAttrs returns a list of attributes supported by the UnixSockAddr type
func UnixSockAttrs() []AttrName {
return unixAttrs
}
// UnixSockAttr returns a string representation of an attribute for the given
// UnixSock.
func UnixSockAttr(us UnixSock, attrName AttrName) string {
fn, found := unixAttrMap[attrName]
if !found {
return ""
}
return fn(us)
}
// unixAttrInit is called once at init()
func unixAttrInit() {
// Sorted for human readability
unixAttrs = []AttrName{
"path",
}
unixAttrMap = map[AttrName]func(us UnixSock) string{
"path": func(us UnixSock) string {
return us.Path()
},
}
}
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