Nginx + FastCGI daemon + goji

gistfile1.go

package main

import (
    "fmt"
    "github.com/zenazn/goji"
    "github.com/zenazn/goji/web"
    "net"
    "net/http"
    "net/http/fcgi"
    "os"
    "syscall"
)

func hello(c web.C, w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello, %s!", c.URLParams["name"])
}

func main() {

    errcd := daemon(0, 0)

    if errcd != 0 {
        fmt.Println("daemon err!!")
        os.Exit(1)
    }

    goji.Get("/", hello)
    listener, _ := net.Listen("tcp", "127.0.0.1:3000")
    fcgi.Serve(listener, goji.DefaultMux)
}

func daemon(nochdir, noclose int) int {
    var ret uintptr
    var err syscall.Errno

    ret, _, err = syscall.Syscall(syscall.SYS_FORK, 0, 0, 0)
    if err != 0 {
        return -1
    }
    switch ret {
    case 0:
        break
    default:
        os.Exit(0)
    }

    pid, _ := syscall.Setsid()
    if pid == -1 {
        return -1
    }

    if nochdir == 0 {
        os.Chdir("/")
    }

    syscall.Umask(0)

    if noclose == 0 {
        f, e := os.OpenFile("/dev/null", os.O_RDWR, 0)
        if e == nil {
            fd := int(f.Fd())
            syscall.Dup2(fd, int(os.Stdin.Fd()))
            syscall.Dup2(fd, int(os.Stdout.Fd()))
            syscall.Dup2(fd, int(os.Stderr.Fd()))
        }
    }

    return 0
}