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package proc
import (
"encoding/gob"
"errors"
"os"
"strconv"
)
var (
ErrNotSet = errors.New("environment variable not set")
ErrInvalid = errors.New("bad file descriptor")
)
func Receive(key string, e any) (func() error, error) {
var setup *os.File
if s, ok := os.LookupEnv(key); !ok {
return nil, ErrNotSet
} else {
if fd, err := strconv.Atoi(s); err != nil {
return nil, err
} else {
setup = os.NewFile(uintptr(fd), "setup")
if setup == nil {
return nil, ErrInvalid
}
}
}
return func() error { return setup.Close() }, gob.NewDecoder(setup).Decode(e)
}
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