求助：使用cURL的--ftp-create-dirs在SFTP连接中无法创建目录

Hey there, let’s dig into why your --ftp-create-dirs flag isn’t creating directories even though your SFTP authentication checks out (and you can browse existing files/dirs). Here are actionable steps to diagnose and fix this:

1. Confirm You’re Using the Flag with the Right Tool & Syntax #

Different tools (like rsync, lftp, or curl) handle --ftp-create-dirs (or equivalent flags) differently:

• For rsync: The --ftp-create-dirs flag only creates missing parent directories for the target file path—not empty directories on their own. You need to:
  • Include the flag before your source/target paths (order matters!)
  • Specify a target path that includes the missing directory you want to create
  • Example of a working command:

    rsync -avv --ftp-create-dirs ./local-document.pdf sftp://your-user@your-server:/existing-parent-dir/new-subdir/
    

    The -vv adds verbose output to show exactly what rsync is trying to do.
• For lftp: Use mirror --create-dirs for directory syncs, or put --create-dirs for single files instead of the generic --ftp-create-dirs flag.

2. Verify Remote Directory Permissions #

Just because you can read files doesn’t mean you have write access to the parent directory where you’re trying to create new folders:

• Use your SFTP client to run ls -ld /path/to/parent-dir (replace with your actual parent path)
• Check that your SFTP user has write permission (the w flag) on that parent directory. If not, you’ll need to ask the server admin to adjust permissions or assign you to the correct group.

3. Test Manual Directory Creation First #

Rule out server-side restrictions by manually creating a directory via SFTP:

• Run mkdir /path/to/parent-dir/new-test-dir directly in your SFTP session
• If this fails, the issue is definitely a permission or server configuration problem (not the --ftp-create-dirs flag itself)
• If this works, the problem is with how you’re using the flag in your command.

4. Check for Relative Path Gotchas #

If you’re using relative paths (e.g., new-dir instead of /full/path/to/new-dir), confirm your SFTP session’s default working directory first with pwd. Your relative path will be resolved against this directory—so if you’re trying to create a folder outside this default path, you’ll need to use an absolute path.

5. Enable Verbose Logging to Spot Hidden Errors #

Add verbose flags to your command to see exactly what’s failing:

• For rsync: Add -v or -vv to get detailed logs about directory creation attempts
• For curl (if using with SFTP): Add -v to see the full SFTP command exchange with the server
  Look for lines like "skipping directory creation" or permission denied messages—these will point you straight to the root cause.

内容的提问来源于stack exchange，提问作者YTZ