shithub: snarflog

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fork into the background like a real program

--- a/main.go

+++ b/main.go

@@ -4,8 +4,11 @@

 	"fmt"

 	"os"

 	"io"

+	"os/exec"

 	"sync"

+	"syscall"

 	"time"

+	"flag"

 	"golang.org/x/sys/plan9"

 	"github.com/knusbaum/go9p/fs"

@@ -140,6 +143,29 @@

 }

 func main() {

+	foreground := flag.Bool("f", false, "run in foreground")

+	flag.Parse()

+	if *foreground {

+		os.Args = append(os.Args[:1], os.Args[2:]...)

+	} else {

+		path, err := exec.LookPath(os.Args[0])

+		if err != nil {

+			fmt.Fprintf(os.Stderr, "snarflog: couldn't find myself: %s\n", err)

+			os.Exit(1)

+		}

+

+		args := append([]string{os.Args[0], "-f"}, os.Args[1:]...)

+

+		_, err = syscall.ForkExec(path, args, &syscall.ProcAttr{

+			Files: []uintptr{os.Stdin.Fd(), os.Stdout.Fd(), os.Stderr.Fd()},

+		})

+		if err != nil {

+			fmt.Fprintf(os.Stderr, "snarflog: fork failed: %s\n", err)

+			os.Exit(1)

+		}

+		os.Exit(0)

+	}

+

 	_, err := os.Stat("/srv/snarflog")

 	if err == nil {

 		srvFd, err := plan9.Open("/srv/snarflog", plan9.O_RDWR)

-- 

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