go-dl is a package exposing dynamic library loading features to the Go language.
The go-dl package exposes the Open function that taking a library name or
path and some options will load the code in memory and return an object allowing
interaction with the library.
Here's an example:
package main
import (
"fmt"
"unsafe"
"github.com/achille-roussel/go-dl"
)
func main() {
var lib dl.Library
var err error
var sym unsafe.Pointer
// Dynamically loads libc on a linux platform.
// Note that the library names or paths are usually system-dependant.
if lib, err = dl.Open("libc.so.6", dl.Lazy|dl.Local); err != nil {
fmt.Println(err)
return
}
defer lib.Close()
// Get the address of the `puts` symbol, this can be used to call the
// function using a ffi package.
if sym, err = lib.Symbol("puts"); err != nil {
fmt.Println(err)
return
}
// ...
}go-dl also comes with a function that attempts to emulate the platform's logic for dynamic library discovery in a portable way, here's an example:
package main
import (
"fmt"
"github.com/achille-roussel/go-dl"
)
func main() {
var path string
var err error
if path, err = dl.Find("libc"); err != nil {
fmt.Println(err)
return
}
// Now `path` holds the full path to where the standard C library was found
// on the system.
fmt.Println(path)
}