C# execute a terminal command in linux

Question

I want my c# application (which I execute on a raspberry pi) to run a bash script whenever it starts..
basically : the script is located in /etc/init.d and is named mnw. I want whenever my c# application starts, it should execute a part of the mnw script.
If it was written it in the terminal would look like :

cd /etc/init.d
./mnw stop

I want this to happen right at the start of public static void Main(), I've been trying

ProcessStartInfo startInfo = new ProcessStartInfo() { FileName = "/dev/init.d/./mnw", Arguments = "stop", }; 
Process proc = new Process() { StartInfo = startInfo, };
proc.Start();

but it says that stop is a unexpected argument, any ideas?

One obvious error - FileName = "/dev/init.d/./mnw" should have been FileName = "/etc/init.d/mnw", but I assume that it's a typo while pasting in this question. — anishsane
– anishsane, Commented May 15, 2014 at 13:28
this is mnw if [ "$1" = "start" ] then start-stop-daemon --start --background -m --oknodo --pidfile /home/pi/p$ elif [ "$1" = "startnbg" ] then start-stop-daemon --start -m --oknodo --pidfile /home/pi/pid/MonoDaemon$ elif [ "$1" = "stop" ] then start-stop-daemon --stop --retry=TERM/30/KILL/5 --pidfile /home/pi/pid/$ else echo Unknown command fi — user3218392
– user3218392, Commented May 15, 2014 at 14:01
No need of argument ProcessStartInfo startInfo = new ProcessStartInfo() { FileName = "/etc/init.d/mnw stop"}; or try ProcessStartInfo startInfo = new ProcessStartInfo() { FileName = "/bin/bash", Arguments = "/etc/init.d/mnw stop", }; — PradyJord
– PradyJord, Commented May 15, 2014 at 14:41

flindeberg · Accepted Answer · 2014-05-15 14:46:19Z

17

I have never used ProcessStartInfo on Mono / Linux, but have you tried calling via bash?

ProcessStartInfo startInfo = new ProcessStartInfo() { FileName = "/bin/bash", Arguments = "/dev/init.d/mnw stop", }; 
Process proc = new Process() { StartInfo = startInfo, };
proc.Start();

Also, there is no issues with the executable bit on mnw?

answered May 15, 2014 at 14:46

flindeberg

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2 Comments

PradyJord Over a year ago

comment says the same :)

flindeberg Over a year ago

Ah, totally missed, that, started writing like an hour ago and forgot to press add:)

3dGrabber · Accepted Answer · 2022-04-21 08:18:03Z

While using the Process class like in the accepted answer works, I' d like to add that there is a library called CliWrap that makes CLI calls like this much easier:

fluent API to build the calls
async support
call with custom environment variables
set working directory
ability to pipe stdout/stderr into a string
retrieve exit code
etc.

using OPs question as example:

var result = await Cli
                  .Wrap("/dev/init.d/mnw")
                  .WithArguments("stop")
                  .ExecuteBufferedAsync();

// result contains:
// -- result.StandardOutput  (string)
// -- result.StandardError   (string)
// -- result.ExitCode        (int)
// -- result.StartTime       (DateTimeOffset)
// -- result.ExitTime        (DateTimeOffset)
// -- result.RunTime         (TimeSpan)

if (result.ExitCode != 0)
    Console.WriteLine("Command failed")

Thank you @Tyrrrz for this library!

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