Passing parameters to bash when executing a script

问题:

I am trying to execute a bash shell script from Windows on a remote Linux machine.

I am using c# and the SSH.Net library.

The scripts live on the windows box and cannot be installed on the Linux machine. I read in the script using 'File.ReadAllText(...)' which loads in the script as string. Using SSH.Net I then execute the script on Linux:

        SshCommand cmd;
        using (var client = new SshClient(ConnectionInfo))
        {
            client.Connect();
            cmd = client.CreateCommand(string.Format("sh -x -s < {0}", script));                 
            cmd.Execute();
            client.Disconnect();
        }
        return cmd.ExitStatus;

This works when the script doesn't have any parameters. But if I need to pass in some arguments the following executes the script but the params are missing:

     cmd = client.CreateCommand(string.Format("sh -x -s p={0} < {1}", parameterString, script));

The sample script is:

#!/bin/bash
# check-user-is-not-root.sh

echo "Currently running $0 script"
echo "This Parameter Count is       [$#]"
echo "All Parameters            [$@]"

The output is:

Currently running bash script
This Parameter Count is     [0]
All Parameters          []

Update

For now I am using curl (like in the approved answer here:).

cmd = client.CreateCommand(string.Format("curl http://10.10.11.11/{0} | bash -s {1}", scriptName, args))

But I still think there must be a way to read in a bash script with arguments and run it across ssh on a remote Linux box.

Any help would be greatly appreciated.

回答1:

Perhaps you are better off running ssh user@host 'command; another; more' or if you really have to use an explicit sh, something like ssh user@host "sh -c 'command; another; more'". That should also save you from putting the script in a temporary file.

回答2:

I've done a little trouble-shooting, entirely off a linux box. I think that the I think that your problem is 'p='.

I put your test script in /tmp/script, and ran the following:

$ ssh 192.168.2.3 sh -s foo bar baz < /tmp/script
Currently running sh script
This Parameter Count is       [3]
All Parameters            [foo bar baz]

I also tried

$ ssh 192.168.2.3 sh -s p=foo bar baz < /tmp/script
Currently running sh script
This Parameter Count is       [3]
All Parameters            [p=foo bar baz]

... so I'm not entirely sure why you're seeing a parameter count of 0, you should be seeing at least 'p=' as a parameter. It looks like you're trying to specify the argument list using 'p=' but that's not necessary. Give it a try without that, and see what happens.

To be clear, '/tmp/script' is stored on my local linux box, not on the remote machine. Anything sent to the standard input of the ssh command will be sent to the remote machine and processed as its standard input of the command being executed, so I could have just as easily used the command

$ cat /tmp/script | ssh 192.168.2.3 sh -s foo bar baz