/usr/share/gocode/src/gopkg.in/lxc/go-lxc.v2/lxc-binding.go is in golang-gopkg-lxc-go-lxc.v2-dev 0.0~git20180119.b964baa-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Use of this source code is governed by a LGPLv2.1
// license that can be found in the LICENSE file.
// +build linux,cgo
package lxc
// #cgo pkg-config: lxc
// #cgo LDFLAGS: -llxc -lutil
// #include <lxc/lxccontainer.h>
// #include <lxc/version.h>
// #include "lxc-binding.h"
// #ifndef LXC_DEVEL
// #define LXC_DEVEL 0
// #endif
import "C"
import (
"fmt"
"runtime"
"strings"
"unsafe"
)
// NewContainer returns a new container struct.
func NewContainer(name string, lxcpath ...string) (*Container, error) {
var container *C.struct_lxc_container
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
if lxcpath != nil && len(lxcpath) == 1 {
clxcpath := C.CString(lxcpath[0])
defer C.free(unsafe.Pointer(clxcpath))
container = C.lxc_container_new(cname, clxcpath)
} else {
container = C.lxc_container_new(cname, nil)
}
if container == nil {
return nil, ErrNewFailed
}
c := &Container{container: container, verbosity: Quiet}
// http://golang.org/pkg/runtime/#SetFinalizer
runtime.SetFinalizer(c, Release)
return c, nil
}
// Acquire increments the reference counter of the container object.
func Acquire(c *Container) bool {
return C.lxc_container_get(c.container) == 1
}
// Release decrements the reference counter of the container object.
func Release(c *Container) bool {
// http://golang.org/pkg/runtime/#SetFinalizer
runtime.SetFinalizer(c, nil)
return C.lxc_container_put(c.container) == 1
}
// Version returns the LXC version.
func Version() string {
version := C.GoString(C.lxc_get_version())
// New liblxc versions append "-devel" when LXC_DEVEL is set.
if strings.HasSuffix(version, "-devel") {
return fmt.Sprintf("%s (devel)", version[:(len(version)-len("-devel"))])
}
return version
}
// GlobalConfigItem returns the value of the given global config key.
func GlobalConfigItem(name string) string {
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
return C.GoString(C.lxc_get_global_config_item(cname))
}
// DefaultConfigPath returns default config path.
func DefaultConfigPath() string {
return GlobalConfigItem("lxc.lxcpath")
}
// DefaultLvmVg returns the name of the default LVM volume group.
func DefaultLvmVg() string {
return GlobalConfigItem("lxc.bdev.lvm.vg")
}
// DefaultZfsRoot returns the name of the default ZFS root.
func DefaultZfsRoot() string {
return GlobalConfigItem("lxc.bdev.zfs.root")
}
// ContainerNames returns the names of defined and active containers on the system.
func ContainerNames(lxcpath ...string) []string {
var size int
var cnames **C.char
if lxcpath != nil && len(lxcpath) == 1 {
clxcpath := C.CString(lxcpath[0])
defer C.free(unsafe.Pointer(clxcpath))
size = int(C.list_all_containers(clxcpath, &cnames, nil))
} else {
size = int(C.list_all_containers(nil, &cnames, nil))
}
if size < 1 {
return nil
}
return convertNArgs(cnames, size)
}
// Containers returns the defined and active containers on the system. Only
// containers that could retrieved successfully are returned.
func Containers(lxcpath ...string) []*Container {
var containers []*Container
for _, v := range ContainerNames(lxcpath...) {
if container, err := NewContainer(v, lxcpath...); err == nil {
containers = append(containers, container)
}
}
return containers
}
// DefinedContainerNames returns the names of the defined containers on the system.
func DefinedContainerNames(lxcpath ...string) []string {
var size int
var cnames **C.char
if lxcpath != nil && len(lxcpath) == 1 {
clxcpath := C.CString(lxcpath[0])
defer C.free(unsafe.Pointer(clxcpath))
size = int(C.list_defined_containers(clxcpath, &cnames, nil))
} else {
size = int(C.list_defined_containers(nil, &cnames, nil))
}
if size < 1 {
return nil
}
return convertNArgs(cnames, size)
}
// DefinedContainers returns the defined containers on the system. Only
// containers that could retrieved successfully are returned.
func DefinedContainers(lxcpath ...string) []*Container {
var containers []*Container
for _, v := range DefinedContainerNames(lxcpath...) {
if container, err := NewContainer(v, lxcpath...); err == nil {
containers = append(containers, container)
}
}
return containers
}
// ActiveContainerNames returns the names of the active containers on the system.
func ActiveContainerNames(lxcpath ...string) []string {
var size int
var cnames **C.char
if lxcpath != nil && len(lxcpath) == 1 {
clxcpath := C.CString(lxcpath[0])
defer C.free(unsafe.Pointer(clxcpath))
size = int(C.list_active_containers(clxcpath, &cnames, nil))
} else {
size = int(C.list_active_containers(nil, &cnames, nil))
}
if size < 1 {
return nil
}
return convertNArgs(cnames, size)
}
// ActiveContainers returns the active containers on the system. Only
// containers that could retrieved successfully are returned.
func ActiveContainers(lxcpath ...string) []*Container {
var containers []*Container
for _, v := range ActiveContainerNames(lxcpath...) {
if container, err := NewContainer(v, lxcpath...); err == nil {
containers = append(containers, container)
}
}
return containers
}
// VersionNumber returns the LXC version.
func VersionNumber() (major int, minor int) {
major = C.LXC_VERSION_MAJOR
minor = C.LXC_VERSION_MINOR
return
}
// VersionAtLeast returns true when the tested version >= current version.
func VersionAtLeast(major int, minor int, micro int) bool {
if C.LXC_DEVEL == 1 {
return true
}
if major > C.LXC_VERSION_MAJOR {
return false
}
if major == C.LXC_VERSION_MAJOR &&
minor > C.LXC_VERSION_MINOR {
return false
}
if major == C.LXC_VERSION_MAJOR &&
minor == C.LXC_VERSION_MINOR &&
micro > C.LXC_VERSION_MICRO {
return false
}
return true
}
// IsSupportedConfigItem returns true if the key belongs to a supported config item.
func IsSupportedConfigItem(key string) bool {
configItem := C.CString(key)
defer C.free(unsafe.Pointer(configItem))
return bool(C.go_lxc_config_item_is_supported(configItem))
}
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