From 02af80ed4e5c6e6ac0f775ae09372fa3163ddbdb Mon Sep 17 00:00:00 2001
From: Alessandro Ros <aler9.dev@gmail.com>
Date: Thu, 13 Apr 2023 20:20:21 +0200
Subject: [PATCH] rpi camera: support running on 32-bit OS with 64-bit kernel
 (#1644) (#1700)

---
 internal/rpicamera/rpicamera.go | 39 ++++-----------------------------
 1 file changed, 4 insertions(+), 35 deletions(-)

diff --git a/internal/rpicamera/rpicamera.go b/internal/rpicamera/rpicamera.go
index 879cf0bf..0215bacf 100644
--- a/internal/rpicamera/rpicamera.go
+++ b/internal/rpicamera/rpicamera.go
@@ -26,17 +26,6 @@ const (
 //go:embed exe/exe
 var exeContent []byte
 
-func getKernelArch() (string, error) {
-	cmd := exec.Command("uname", "-m")
-
-	byts, err := cmd.Output()
-	if err != nil {
-		return "", err
-	}
-
-	return string(byts[:len(byts)-1]), nil
-}
-
 func startEmbeddedExe(content []byte, env []string) (*exec.Cmd, error) {
 	tempPath := tempPathPrefix + strconv.FormatInt(time.Now().UnixNano(), 10)
 
@@ -103,6 +92,9 @@ func findLibrary(name string) (string, error) {
 		for _, line := range strings.Split(string(byts), "\n") {
 			f := strings.Split(line, " => ")
 			if len(f) == 2 && strings.Contains(f[1], name+".so") {
+				if runtime.GOARCH == "arm" && !strings.Contains(f[1], "arm-linux-gnueabihf") {
+					return "", fmt.Errorf("libcamera is 64-bit, you need the 64-bit server version")
+				}
 				return f[1], nil
 			}
 		}
@@ -121,24 +113,6 @@ func setupSymlink(name string) error {
 	return os.Symlink(lib, "/dev/shm/"+name+".so.x.x.x")
 }
 
-// 32-bit embedded executables can't run on 64-bit.
-func checkArch() error {
-	if runtime.GOARCH != "arm" {
-		return nil
-	}
-
-	arch, err := getKernelArch()
-	if err != nil {
-		return err
-	}
-
-	if arch == "aarch64" {
-		return fmt.Errorf("OS is 64-bit, you need the arm64 server version")
-	}
-
-	return nil
-}
-
 var (
 	mutex    sync.Mutex
 	setupped bool
@@ -149,12 +123,7 @@ func setupLibcameraOnce() error {
 	defer mutex.Unlock()
 
 	if !setupped {
-		err := checkArch()
-		if err != nil {
-			return err
-		}
-
-		err = setupSymlink("libcamera")
+		err := setupSymlink("libcamera")
 		if err != nil {
 			return err
 		}