在 ruby​​ 中获取“未知文件类型”

Question

这是我的代码：

> !#usr/bin/ruby

require 'fileutils'

Dir.chdir "/home/john/Documents"

if (Dir.exist?("Photoshoot") === false) then
    Dir.mkdir "Photoshoot"
    puts "Directory: 'Photoshoot' created"
end

Dir.chdir "/run/user/1000/gvfs"

camdirs = Dir.glob('*')
numcams = camdirs.length
camnum = 0
campath = []

while camnum < numcams do
    campath.push("/run/user/1000/gvfs/#{camdirs[camnum]}/DCIM")
    puts campath[camnum]

    camnum += 1
end

campath.each do |path|
    Dir.chdir (path)
    foldnum = 0
    foldir = Dir.glob('*')
    puts foldir
    Dir.entries("#{path}/#{foldir[foldnum]}").each do |filename|
        filetype = File.extname(filename)
        if filetype == ".JPG"
            FileUtils.mv("#{path}/#{foldir[foldnum]}/#{filename}", "/home/john/Documents/Photoshoot")
        end
        foldnum += 1
    end


end
puts "#{numcams} cameras detected"

我只是想进入一些我已连接的相机并将所有图像提取到一个文件中，但它给了我这个错误。让我感到困惑的一件事是图像存储在 DCIM 下的子文件夹中。当我只使用 .entries 时，它会为我提供图像所在的文件夹以及图像。

/usr/lib/ruby/2.3.0/fileutils.rb:1387:in `copy': unknown file type: /run/user/1000/gvfs/gphoto2:host=%5Busb%3A002%2C021%5D/DCIM//IMG_0092.JPG (RuntimeError)
    from /usr/lib/ruby/2.3.0/fileutils.rb:472:in `block in copy_entry'
    from /usr/lib/ruby/2.3.0/fileutils.rb:1498:in `wrap_traverse'
    from /usr/lib/ruby/2.3.0/fileutils.rb:469:in `copy_entry'
    from /usr/lib/ruby/2.3.0/fileutils.rb:530:in `rescue in block in mv'
    from /usr/lib/ruby/2.3.0/fileutils.rb:527:in `block in mv'
    from /usr/lib/ruby/2.3.0/fileutils.rb:1571:in `block in fu_each_src_dest'
    from /usr/lib/ruby/2.3.0/fileutils.rb:1585:in `fu_each_src_dest0'
    from /usr/lib/ruby/2.3.0/fileutils.rb:1569:in `fu_each_src_dest'
    from /usr/lib/ruby/2.3.0/fileutils.rb:517:in `mv'
    from /home/john/Desktop/TestExtract.rb:34:in `block (2 levels) in <main>'
    from /home/john/Desktop/TestExtract.rb:31:in `each'
    from /home/john/Desktop/TestExtract.rb:31:in `block in <main>'
    from /home/john/Desktop/TestExtract.rb:26:in `each'
    from /home/john/Desktop/TestExtract.rb:26:in `<main>'
/run/user/1000/gvfs/gphoto2:host=%5Busb%3A002%2C022%5D/DCIM
/run/user/1000/gvfs/gphoto2:host=%5Busb%3A002%2C021%5D/DCIM
/run/user/1000/gvfs/gphoto2:host=%5Busb%3A002%2C020%5D/DCIM
104___03
105___04
106___05
102___01
[Finished in 0.1s with exit code 1]
[shell_cmd: ruby "/home/john/Desktop/TestExtract.rb"]
[dir: /home/john/Desktop]
[path: /home/john/bin:/home/john/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin]

有什么建议吗？我不知道出了什么问题。

Answer 1

您的文件路径看起来很奇怪的原因是您的相机存储已使用FUSE 安装。如果您仔细观察，您会发现它正在寻找：

/run/user/1000/gvfs/gphoto2:host=%5Busb%3A002%2C021%5D/DCIM//IMG_0092.JPG

最终文件名前有两个正斜杠。尝试在应用的第 34 行更正此问题。

如果问题仍然存在，则可能是在 Ruby 中运行该操作的用户没有对该文件系统的权限，或者 FUSE 构建路径的方式与 Ruby FileUtils 不兼容。

你可以尝试运行：

cat /run/user/1000/gvfs/gphoto2:host=%5Busb%3A002%2C021%5D/DCIM/IMG_0092.JPG

作为运行 Ruby 进程的同一用户，以确保您具有文件系统的读取权限。