func (c *qCmd) start(txt string) error {
c.Lock()
if c.ctx != nil {
c.Unlock()
return fmt.Errorf("%s: one cmd is enough", c)
}
c.txt = txt
var in chan interface{}
if c.in.Len() > 0 {
c.in.c = make(chan interface{}, len(c.in.msgs))
for _, m := range c.in.msgs {
c.in.c <- m
}
close(c.in.c)
in = c.in.c
}
outfn := func(c *qCmd, io *qIO, outc chan interface{}) {
for m := range outc {
c.Lock()
io.addOut(m)
c.Unlock()
}
io.eof = true
io.wakeup()
}
out := make(chan interface{})
go outfn(c, c.out, out)
err := make(chan interface{})
go outfn(c, c.err, err)
c.e.runc <- func() {
c.ctx = app.Go(func() {
c.Unlock()
app.DupDot()
app.DupEnv()
app.NewIO(nil)
app.SetIO(in, 0)
app.SetIO(out, 1)
app.SetIO(err, 2)
ql.Run()
}, "ql", "-c", c.txt)
}
return nil
}
// runs here
func runDup(x *xEnv, argv ...string) error {
opts := opt.New("dup")
app.Dprintf("dup %v\n", argv)
args, err := opts.Parse(argv)
if err != nil {
opts.Usage()
return dbg.ErrUsage
}
for _, arg := range args {
switch arg {
case "ns":
app.DupNS()
case "io":
app.DupIO()
case "env":
app.DupEnv()
case "dot":
app.DupDot()
default:
app.Warn("unknown resource '%s'", arg)
}
}
return nil
}