func RunExternalDump(cmd, wd string, argv []string, dump io.Writer) (err os.Error) {
var p *exec.Cmd
p, err = exec.Run(cmd, argv, nil, wd, exec.PassThrough, exec.Pipe, exec.PassThrough)
if err != nil {
return
}
if p != nil {
src := p.Stdout
buffer := make([]byte, 1024)
for {
n, cpErr := src.Read(buffer)
if cpErr != nil {
break
}
_, cpErr = dump.Write(buffer[0:n])
if cpErr != nil {
break
}
}
var wmsg *os.Waitmsg
wmsg, err = p.Wait(0)
if wmsg.ExitStatus() != 0 {
err = os.NewError(fmt.Sprintf("%v: %s\n", argv, wmsg.String()))
return
}
if err != nil {
return
}
}
return
}
func build(gcfile string, opts []string, proFileName string, files []string, envv []string, dir string) (status syscall.WaitStatus, err os.Error) {
arg := []string{gcfile, "-o", proFileName}
for _, v := range opts {
arg = append(arg, v)
}
for _, v := range files {
arg = append(arg, string(v))
}
fmt.Println("\t", arg)
var cmd *exec.Cmd
cmd, err = exec.Run(gcfile, arg[:], envv[:], dir, 0, 1, 2)
if err != nil {
fmt.Printf("Error, %s", err)
return
}
defer cmd.Close()
var wait *os.Waitmsg
wait, err = cmd.Wait(0)
if err != nil {
fmt.Printf("Error, %s", err)
return
}
status = wait.WaitStatus
return
}
func RunWithEnvAndWd(command string, args []string, env []string, wd string) (proc *exec.Cmd, err os.Error) {
//log.Println(command, args)
//hho := exec.PassThrough
args = prepend(args, command)
env = mergeEnv(os.Environ(), env)
binpath, err := findCmd(findEnv(env, "PATH"), command)
if err != nil {
return nil, err
}
cmd := new(exec.Cmd)
cmd.Path = binpath
cmd.Args = args
cmd.Env = env
cmd.Dir = wd
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
err = cmd.Start()
if err != nil {
log.Print("Error running command ", command, ": ", err, "\n")
return nil, err
}
return cmd, nil
}
func RunExternalAndStdout(cmd, wd string, argv []string) (stdout []byte, err os.Error) {
argv = SplitArgs(argv)
var c *exec.Cmd
if len(argv) > 0 {
c = exec.Command(cmd, argv...)
} else {
c = exec.Command(cmd)
}
c.Dir = wd
c.Env = os.Environ()
bStdout := bytes.NewBuffer(nil)
bStderr := bytes.NewBuffer(nil)
c.Stdout = bStdout
c.Stderr = bStderr
err = c.Run()
if wmsg, ok := err.(*os.Waitmsg); ok {
if wmsg.ExitStatus() != 0 {
err = os.NewError(fmt.Sprintf("command: %s %v\n%s\n", cmd, argv, bStderr.String()))
} else {
err = nil
}
} else {
stdout = bStdout.Bytes()
}
return
}
func pack(pkfile string, target string, ofile string, envv []string, dir string) (status syscall.WaitStatus, err os.Error) {
arg := []string{pkfile, "grc", target, ofile}
fmt.Println("\t", arg)
var cmd *exec.Cmd
cmd, err = exec.Run(pkfile, arg[:], envv[:], dir, 0, 1, 2)
if err != nil {
fmt.Printf("Error, %s", err)
return
}
defer cmd.Close()
var wait *os.Waitmsg
wait, err = cmd.Wait(0)
if err != nil {
fmt.Printf("Error, %s", err)
return
}
status = wait.WaitStatus
return
}
/* Execute command coming from inch channel */
func execute(inch chan *command) {
var c *command
var cmd *exec.Cmd
var err os.Error
var argv0, dir string
var argv []string
for {
c = <-inch
dir = os.Getenv("PWD")
switch c.cmdtype {
case BUILTIN:
cb := BUILTIN_COMMANDS[c.name]
LAST_RETURN_VALUE = cb(c.args)
case EXTERNAL:
if argv0, err = exec.LookPath(c.name); err != nil {
goto Error
}
if len(c.args) > 0 {
argv = c.args
}
envv := os.Environ()
cmd, err = exec.Run(argv0, argv, envv, dir,
exec.PassThrough, exec.PassThrough, exec.PassThrough)
err = cmd.Close()
//TODO update LAST_RETURN_VALUE
Error:
if err != nil {
error(err.String())
}
}
inch <- nil //release blockage in main loop()
}
}
func link(glfile string, opts []string, target string, ofile string, envv []string, dir string) (status syscall.WaitStatus, err os.Error) {
arg := []string{glfile, "-o", target}
for _, v := range opts {
arg = append(arg, v)
}
arg = append(arg, ofile)
fmt.Println("\t", arg)
var cmd *exec.Cmd
cmd, err = exec.Run(glfile, arg[:], envv[:], dir, 0, 1, 2)
if err != nil {
fmt.Printf("Error, %s", err)
return
}
defer cmd.Close()
var wait *os.Waitmsg
wait, err = cmd.Wait(0)
if err != nil {
fmt.Printf("Error, %s", err)
return
}
status = wait.WaitStatus
return
}
// run runs the command argv, resolving argv[0] if necessary by searching $PATH.
// It provides input on standard input to the command.
func run(argv []string, input []byte) (out string, err os.Error) {
if len(argv) < 1 {
err = os.EINVAL
goto Error
}
prog, ok := lookPathCache[argv[0]]
if !ok {
prog, err = exec.LookPath(argv[0])
if err != nil {
goto Error
}
lookPathCache[argv[0]] = prog
}
// fmt.Fprintf(os.Stderr, "%v\n", argv);
var cmd *exec.Cmd
if len(input) == 0 {
cmd, err = exec.Run(prog, argv, os.Environ(), "", exec.DevNull, exec.Pipe, exec.MergeWithStdout)
if err != nil {
goto Error
}
} else {
cmd, err = exec.Run(prog, argv, os.Environ(), "", exec.Pipe, exec.Pipe, exec.MergeWithStdout)
if err != nil {
goto Error
}
go func() {
cmd.Stdin.Write(input)
cmd.Stdin.Close()
}()
}
defer cmd.Close()
var buf bytes.Buffer
_, err = io.Copy(&buf, cmd.Stdout)
out = buf.String()
if err != nil {
cmd.Wait(0)
goto Error
}
w, err := cmd.Wait(0)
if err != nil {
goto Error
}
if !w.Exited() || w.ExitStatus() != 0 {
err = w
goto Error
}
return
Error:
err = &runError{copy(argv), err}
return
}
func StdExecve(argv []string, stopOnTrouble bool) bool {
var err os.Error
var cmd *exec.Cmd
switch len(argv) {
case 0:
if stopOnTrouble {
log.Fatalf("[ERROR] len(argv) == 0\n")
}
return false
case 1:
cmd = exec.Command(argv[0])
default:
cmd = exec.Command(argv[0], argv[1:]...)
}
// pass-through
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
err = cmd.Start()
if err != nil {
if stopOnTrouble {
log.Fatalf("[ERROR] %s\n", err)
} else {
log.Printf("[ERROR] %s\n", err)
return false
}
}
err = cmd.Wait()
if err != nil {
if stopOnTrouble {
log.Fatalf("[ERROR] %s\n", err)
} else {
log.Printf("[ERROR] %s\n", err)
return false
}
}
return true
}
func run(argv []string, stdin, stdout, stderr int) (out string, err os.Error) {
if len(argv) < 1 {
err = os.EINVAL
goto Error
}
var cmd *exec.Cmd
cmd, err = exec.Run(argv[0], argv, os.Environ(), "", stdin, stdout, stderr)
if err != nil {
goto Error
}
defer cmd.Close()
var buf bytes.Buffer
_, err = io.Copy(&buf, cmd.Stdout)
out = buf.String()
if err != nil {
cmd.Wait(0)
goto Error
}
w, err := cmd.Wait(0)
if err != nil {
goto Error
}
if !w.Exited() || w.ExitStatus() != 0 {
err = w
goto Error
}
return
Error:
err = &runError{copy(argv), err}
return
}
func ProcessRequest(request DownloadRequest) {
var tempFile string = MakeTempFileName(request.url, ".flv")
var tempFileSansExtension string
{
pathDotIndex := strings.LastIndex(tempFile, ".")
tempFileSansExtension = tempFile[0:pathDotIndex]
}
var cmd *exec.Cmd = MakeCommand(&request, tempFile)
if cmd == nil {
request.WriteError("forming the download command", nil)
return
}
var proc *StdoutProcessor
if pipe, e := cmd.StdoutPipe(); e != nil {
request.WriteError("setting youtube-dl pipe", e)
return
} else {
proc = NewStdoutProcessor(&pipe)
}
if e := cmd.Start(); e != nil {
request.WriteError("running youtube-dl", e)
return
}
var state DownloadState = kStarting
var data map[string]interface{}
var e os.Error
for {
status, e := proc.ParseOneStatusMessage()
if e != nil {
if state < kExtractingAudio {
request.WriteError("downloading the video", e)
return
} else {
break
}
} else if status == nil {
continue
}
if status.state != kDownloadingVideo && (status.state == 0 || status.state == state) {
continue
}
fmt.Printf("Proc SM: %v\n", status)
if status.state >= kDownloadingVideo && state != status.state {
if data, e = ReadJson(tempFile + ".info.json"); e != nil {
request.WriteError("reading video JSON", e)
return
}
status.title = data["title"].(string)
}
state = status.state
status.requestId = request.id
request.statusChannel <- *status
}
var finalFileBaseName = data["title"].(string) + "." + *outputFormat
var finalFile = request.basePath + "/" + finalFileBaseName
if _, e := CopyFile(finalFile,
tempFileSansExtension+"."+*outputFormat); e != nil {
request.WriteError("tagging", e)
return
}
request.statusChannel <- StatusMessage{request.id, kTagging, "", "", 0, 0, 0, nil, ""}
var c = exec.Command("lltag", "--yes", "-G", "--rename=%a/%t", finalFileBaseName)
c.Dir = request.basePath
out, ioError := c.StdoutPipe()
if ioError != nil {
request.WriteError("starting the tagger", ioError)
return
}
var in io.WriteCloser
in, ioError = c.StdinPipe()
if ioError != nil {
request.WriteError("starting the tagger", ioError)
return
}
var link string
if e = c.Start(); e != nil {
request.WriteError("tagging", e)
return
} else {
in.Write([]byte(strings.Repeat("y\n", 20)))
outData, e := ioutil.ReadAll(out)
if e != nil {
request.WriteError("reading the tagger output", e)
return
}
match := regexp.MustCompile("New filename is '([^\n]*)'\n").FindStringSubmatch(string(outData))
fmt.Printf("out data: %s\n\nmatch: %v\n", string(outData), match)
if match == nil {
request.WriteError("finding the output file", os.NewError("fail"))
return
}
link = "/files/" + match[1]
}
fmt.Printf("Link: %s\n", link)
request.statusChannel <- StatusMessage{request.id, kComplete, link, "", 0, 0, 0, nil, ""}
}
/*
Set up a command to use os standard in/out/err
*/
func set_exec(c *exec.Cmd) {
c.Stdout = os.Stdout
c.Stdin = os.Stdin
c.Stderr = os.Stderr
}
