使用管理員權限在ruby中打開文件

在Windows機器上（Windows 7正在運行，x86-64）可以打開system32/drivers/etc中的'etc/hosts'文件，修改它並從ruby保存？使用管理員權限在ruby中打開文件

我得到錯誤的代碼非常簡單

 
file = File.open("C:/Windows/System32/drivers/etc/hosts") 
file << "new line"

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2011-07-15 Sergey

是因爲Windows受保護的文件？也許你必須關閉hosts文件。 –

你必須在寫入模式下打開你的文件。對不起，我一開始沒有看到這個:) – Senthess

如果你想追加某些東西到文件中，用'a +'模式打開它，請閱讀File.open文檔。 –

Instead of trying to acquire privileges from code (which maybe won't be portable across different windows OS'es), do like this:

open a command prompt as an administrator
run your script from there

By doing like this, all the programs you're executing will have administrative privileges as well.

EDIT: This is your problem:

file = File.open("C:/Windows/System32/drivers/etc/hosts","w") 
file << "new line"

You have to open the file in write mode.

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2011-07-15 12:04:27 Senthess

yeap，我試過了，但它仍然顯示「沒有打開寫入（IO錯誤）」 – Sergey

My best work around is have ruby open an elevated command prompt when necessary. It will prompt the user for a password, but it is better than nothing.

username = `whoami`.chomp 
run = "runas /noprofile /user:#{username} \"cmd /C#{cmd}\"" 
system(run)

cmd可以是要與權限運行任何命令，「不寫（IO錯誤）打開」。我所做的編輯主機文件是：

hosts_path = 'C:\windows\System32\drivers\etc\hosts' 
hosts_file = File.open(host_path,'r') {|f| f.read} 
... 
    --edit the hosts_file here-- 
... 
cmd = "echo \"#{hosts_file}\" > #{hosts_path}"

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2014-05-15 17:39:28 mvndaai

使用管理員權限在ruby中打開文件

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