core: 记录 xda 到文件

README.en.md

@@ -163,7 +163,7 @@ bash reinstall.sh centos      9
 > When installing Debian / Kali, x86 architectures can monitor the installation progress through VNC in the background, while ARM architectures can use the serial console.
 >
 > When installing other systems, can monitor the progress through various methods (SSH, HTTP 80 port, VNC in the background, serial console).
-> <br />Even if errors occur during the installation process, you can still install to Alpine via SSH by running `xda=drive_name /trans.sh alpine`
+> <br />Even if errors occur during the installation process, you can still install to Alpine via SSH by running `/trans.sh alpine`
 
 <details>
 
@@ -217,7 +217,7 @@ bash reinstall.sh dd --img https://example.com/xxx.xz
 
 > [!TIP]
 > Can monitor the progress through various methods (SSH, HTTP 80 port, VNC in the background, serial console).
-> <br />Even if errors occur during the installation process, you can still install to Alpine via SSH by running `xda=drive_name /trans.sh alpine`
+> <br />Even if errors occur during the installation process, you can still install to Alpine via SSH by running `/trans.sh alpine`
 
 ### Feature 3: Reboot to <img width="16" height="16" src="https://www.alpinelinux.org/alpine-logo.ico" /> Alpine Rescue System (Live OS)
 

README.md

@@ -163,7 +163,7 @@ bash reinstall.sh centos      9
 > 安装 Debian / Kali 时，x86 可通过后台 VNC 查看安装进度，ARM 可通过串行控制台查看安装进度。
 >
 > 安装其它系统时，可通过多种方式（SSH、HTTP 80 端口、后台 VNC、串行控制台）查看安装进度。
-> <br />即使安装过程出错，也能通过 SSH 运行 `xda=硬盘名 /trans.sh alpine` 安装到 Alpine。
+> <br />即使安装过程出错，也能通过 SSH 运行 `/trans.sh alpine` 安装到 Alpine。
 
 <details>
 
@@ -217,7 +217,7 @@ bash reinstall.sh dd --img https://example.com/xxx.xz
 
 > [!TIP]
 > 可通过多种方式（SSH、HTTP 80 端口、后台 VNC、串行控制台）查看安装进度。
-> <br />即使安装过程出错，也能通过 SSH 运行 `xda=硬盘名 /trans.sh alpine` 安装到 Alpine。
+> <br />即使安装过程出错，也能通过 SSH 运行 `/trans.sh alpine` 安装到 Alpine。
 
 ### 功能 3: 重启到 <img width="16" height="16" src="https://www.alpinelinux.org/alpine-logo.ico" /> Alpine Live OS（救援系统）
 

trans.sh

@@ -284,6 +284,14 @@ get_ttys() {
 }
 
 find_xda() {
+    # 出错后再运行脚本，硬盘可能已经格式化，之前记录的分区表 id 无效
+    # 因此找到 xda 后要保存 xda 到 /config/xda
+
+    # 先读取之前保存的
+    if xda=$(get_config xda 2>/dev/null) && [ -n "$xda" ]; then
+        return
+    fi
+
     # 防止 $main_disk 为空
     if [ -z "$main_disk" ]; then
         error_and_exit "cmdline main_disk is empty."
@@ -316,7 +324,9 @@ find_xda() {
         xda=$(lsblk --nodeps -rno NAME,PTUUID | grep -iw "$main_disk" | awk '{print $1}')
     fi
 
-    if [ -z "$xda" ]; then
+    if [ -n "$xda" ]; then
+        set_config xda "$xda"
+    else
         error_and_exit "Could not find xda: $main_disk"
     fi
 
@@ -478,6 +488,10 @@ get_config() {
     cat "/configs/$1"
 }
 
+set_config() {
+    printf '%s' "$2" >"/configs/$1"
+}
+
 get_password_linux_sha512() {
     get_config password-linux-sha512
 }