RemotePathShellQuoteTransformation
Quotes a path in a way to be suitable to be used with a shell-based server.
using Renci.SshNet.Common;
using System.Text;
namespace Renci.SshNet
{
internal sealed class RemotePathShellQuoteTransformation : IRemotePathTransformation
{
private enum ShellQuoteState
{
Unquoted = 1,
SingleQuoted,
Quoted
}
public string Transform(string path)
{
ThrowHelper.ThrowIfNull(path, "path");
StringBuilder stringBuilder = new StringBuilder(path.Length + 2);
ShellQuoteState shellQuoteState = ShellQuoteState.Unquoted;
foreach (char c in path) {
switch (c) {
case '\'':
switch (shellQuoteState) {
case ShellQuoteState.Unquoted:
stringBuilder.Append('"');
break;
case ShellQuoteState.SingleQuoted:
stringBuilder.Append('\'');
stringBuilder.Append('"');
break;
}
shellQuoteState = ShellQuoteState.Quoted;
break;
case '!':
switch (shellQuoteState) {
case ShellQuoteState.Unquoted:
stringBuilder.Append('\\');
break;
case ShellQuoteState.Quoted:
stringBuilder.Append('"');
stringBuilder.Append('\\');
break;
case ShellQuoteState.SingleQuoted:
stringBuilder.Append('\'');
stringBuilder.Append('\\');
break;
}
shellQuoteState = ShellQuoteState.Unquoted;
break;
default:
switch (shellQuoteState) {
case ShellQuoteState.Unquoted:
stringBuilder.Append('\'');
break;
case ShellQuoteState.Quoted:
stringBuilder.Append('"');
stringBuilder.Append('\'');
break;
}
shellQuoteState = ShellQuoteState.SingleQuoted;
break;
}
stringBuilder.Append(c);
}
switch (shellQuoteState) {
case ShellQuoteState.Quoted:
stringBuilder.Append('"');
break;
case ShellQuoteState.SingleQuoted:
stringBuilder.Append('\'');
break;
}
if (stringBuilder.Length == 0)
stringBuilder.Append("''");
return stringBuilder.ToString();
}
}
}