In a lot of languages and platforms, you can easily execute shell or bash commands – like using back tick for example in PHP:
[php]
`echo hello`;
[/php]
In the .NET Core world, it’s a little bit more involved – so I wrote a helper class:
[csharp]
using System;
using System.Diagnostics;
public static class ShellHelper
{
public static string Bash(this string cmd)
{
var escapedArgs = cmd.Replace("\"", "\\\"");
var process = new Process()
{
StartInfo = new ProcessStartInfo
{
FileName = "/bin/bash",
Arguments = $"-c \"{escapedArgs}\"",
RedirectStandardOutput = true,
UseShellExecute = false,
CreateNoWindow = true,
}
};
process.Start();
string result = process.StandardOutput.ReadToEnd();
process.WaitForExit();
return result;
}
}
[/csharp]
It’s an extension method, so after importing the namespace (if different), you can use it like this:
[csharp]
var output = "ps aux".Bash();
[/csharp]
output will contain the STDOUT of the result. Currently STDERR is not captured, but the above could easily be modified to do just that by changing the property RedirectStandardOutput and reading process.StandardError.
Great stuff. I will use it in my projects.
I am unable to run the linux command using dotnet core., followed the same steps but could not actually see the output of it.,
I am actually trying to run the commands to set the network configuration using c#.
Please help me in solving this to setup network configuration using c#.,the following is the code .
var args = string.Format(“ifconfig {0} {1} netmask {2} up”, networkType, ipAddress, subnet);
Process process = new Process();
ProcessStartInfo startInfo = new ProcessStartInfo
{
FileName = “/bin/bash”,
Arguments = “-c \”{args}\””,
RedirectStandardOutput = true,
UseShellExecute = false,
CreateNoWindow = true,
};
startInfo.ErrorDialog = false;
startInfo.RedirectStandardError = true;
startInfo.RedirectStandardInput = true;
Thanks!!!
I had to use the verbatim identifier on the strings to get the command to run: arguments.Replace(@”\”, @”/”)
I know this will come of as dumb question, but I don’t have much experience in linux.
What is the use of “-c” in arguments?
The -c allows you to pass the command to execute as an argument. See https://linux.die.net/man/1/bash for more details.
I was unable to run your code. Looks like for some reason my system does not recognize /bin/bash when run by ProcessStartInfo
Very useful helper, it helped me along my school project with using Raspbian. I had to get information from exiftool using bash. This helped me a lot.
Great command! thank you!
f
Hi, how do you add environment variables for the command? Putting them in the beginning didnt work.
Great work! I was looking for something like this!
Thanx a lot!
Simple and effective! Thanks a lot for this post!
Hi,
Can you tell me, please, under which license the above code is placed?
As the author says, the code is licensed under MIT License:
“Hi Andrei,
It’s licensed under the MIT license.
Cheers
On 1 Aug 2022 7:59 pm, Andrei Fogoros wrote:
Hi,
Can you tell me, please, under which license the code from the following link is placed? https://loune.net/2017/06/running-shell-bash-commands-in-net-core/
Regards,
Andrei Fogoros”