在使用.Net Core的Linux机器上查找内核数失败，并出现错误(带引号的字符串未终止) [英] Find number of cores on a linux machine using .Net Core failed with error (Unterminated quoted String)

问题描述

我在.Net Core中编写了以下代码，以检索运行Ubuntu OS的计算机的内核数.

I wrote the following code in .Net Core to retrieve number of cores of machine running a Ubuntu OS.

var proc = new Process
{
   StartInfo = new ProcessStartInfo
   {
      FileName = "/bin/sh",
      Arguments = "-c 'grep \"$0\" /proc/cpuinfo | uniq | sed -e \"$1\"' \"cpu cores\" 's/[^0-9]*//g'",
      UseShellExecute = false,
      RedirectStandardOutput = true,
      CreateNoWindow = true
   }
};

proc.Start();
string line = proc.StandardOutput.ReadToEnd();

如果我在腻子上执行命令，该命令将提供预期的结果，但是当我尝试在.Net Core代码中运行该命令时，该命令失败并显示错误.

The command gives expected result if I execute it on putty but fails with error when I try to run it inside my .Net Core code.

错误:$ 0:1:$ 0:语法错误:引号末尾的字符串

Error: $0: 1: $0: Syntax error: Unterminated quoted string

任何sh和.Net-Core专家都能解释我的代码有什么问题吗?

Any sh and .Net-Core expert who can explain what is wrong with my code?

推荐答案

在参数字符串之前放置 @ ，使其成为逐字字符串.现在，您的字符串将反斜杠作为转义序列.

Put an @ before your argument string to make it a verbatim string. Your string now has the backslash as escape sequence.

var proc = new Process
{
   StartInfo = new ProcessStartInfo
   {
      FileName = "/bin/sh",
      Arguments = @"-c $'grep \""$0\"" /proc/cpuinfo | uniq | sed -e \""$1\"" \""cpu cores\"" 's/[^0-9]*//g''",
      UseShellExecute = false,
      RedirectStandardOutput = true,
      CreateNoWindow = true
   }
};

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