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docker.go
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docker.go
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package main
import (
"fmt"
"os"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/dockerversion"
flag "github.com/docker/docker/pkg/mflag"
"github.com/docker/docker/pkg/reexec"
"github.com/docker/docker/pkg/term"
"github.com/docker/docker/utils"
)
var (
daemonCli = NewDaemonCli()
flHelp = flag.Bool([]string{"h", "-help"}, false, "Print usage")
flVersion = flag.Bool([]string{"v", "-version"}, false, "Print version information and quit")
)
func main() {
if reexec.Init() {
return
}
// Set terminal emulation based on platform as required.
_, stdout, stderr := term.StdStreams()
logrus.SetOutput(stderr)
flag.Merge(flag.CommandLine, daemonCli.commonFlags.FlagSet)
flag.Usage = func() {
fmt.Fprint(stdout, "Usage: dockerd [OPTIONS]\n\n")
fmt.Fprint(stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")
flag.CommandLine.SetOutput(stdout)
flag.PrintDefaults()
}
flag.CommandLine.ShortUsage = func() {
fmt.Fprint(stderr, "\nUsage:\tdockerd [OPTIONS]\n")
}
if err := flag.CommandLine.ParseFlags(os.Args[1:], false); err != nil {
os.Exit(1)
}
if *flVersion {
showVersion()
return
}
if *flHelp {
// if global flag --help is present, regardless of what other options and commands there are,
// just print the usage.
flag.Usage()
return
}
// On Windows, this may be launching as a service or with an option to
// register the service.
stop, err := initService()
if err != nil {
logrus.Fatal(err)
}
if !stop {
err = daemonCli.start()
notifyShutdown(err)
if err != nil {
logrus.Fatal(err)
}
}
}
func showVersion() {
if utils.ExperimentalBuild() {
fmt.Printf("Docker version %s, build %s, experimental\n", dockerversion.Version, dockerversion.GitCommit)
} else {
fmt.Printf("Docker version %s, build %s\n", dockerversion.Version, dockerversion.GitCommit)
}
}