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moby--moby/pkg/reexec/reexec.go
unclejack 1cb17f03d0 add pkg/chrootarchive and use it on the daemon
Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)

Conflicts:
	builder/internals.go
	daemon/graphdriver/aufs/aufs.go
	daemon/volumes.go
		fixed conflicts in imports
2014-11-25 01:03:40 +02:00

42 lines
895 B
Go

package reexec
import (
"fmt"
"os"
"os/exec"
"path/filepath"
)
var registeredInitializers = make(map[string]func())
// Register adds an initialization func under the specified name
func Register(name string, initializer func()) {
if _, exists := registeredInitializers[name]; exists {
panic(fmt.Sprintf("reexec func already registred under name %q", name))
}
registeredInitializers[name] = initializer
}
// Init is called as the first part of the exec process and returns true if an
// initialization function was called.
func Init() bool {
initializer, exists := registeredInitializers[os.Args[0]]
if exists {
initializer()
return true
}
return false
}
// Self returns the path to the current processes binary
func Self() string {
name := os.Args[0]
if filepath.Base(name) == name {
if lp, err := exec.LookPath(name); err == nil {
name = lp
}
}
return name
}