* [maixcam2] optimize gen_os.sh

Author: lxowalle

tools/os/maixcam2/gen_os.sh

@@ -115,11 +115,7 @@ set -x
 
 # 设置输出的镜像名字 maixcam2-2025-04-16-maixpy-v4.11.0
 date_now=$(date +"%Y-%m-%d")
-if [[ "$whl_path" == *MaixPy* ]]; then
-    maixpy_version=$(echo "$whl_path" | grep -oP '(?<=MaixPy)[^ ]+')
-else
-    maixpy_version=$(echo "$whl_path" | grep -oP '(?<=maixpy)[^ ]+')
-fi
+maixpy_version=$(echo "$whl_path" | sed -E 's/.*-([0-9]+\.[0-9]+\.[0-9]+)-.*/\1/')
 os_version_str=${board_name}-${date_now}-maixpy-v${maixpy_version}
 
 

tools/os/maixcam2/update_img.sh

@@ -57,9 +57,15 @@ if [ ! -f "$delete_first_files" ]; then
     exit 1
 fi
 
-
+echo "Umounting raw rootfs"
+umount tmp2/rootfs
+if [ $? -ne 0 ]; then
+    echo "Failed to unmount tmp2/rootfs"
+    exit 2
+fi
 rm -rf tmp2/*
 mkdir -p tmp2
+chmod 777 tmp2
 
 # if builtin_files is a xz or tar.xz file, unzip it to tmp2/builtin_files
 if [[ "$builtin_files" == *.tar.xz ]]; then