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更新head、tail、wc

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Leonmmcoset
2026-01-30 23:41:52 +08:00
parent cefeee7835
commit 1c626a96d4
1 changed files with 150 additions and 0 deletions
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150
Shell.cs
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@@ -84,6 +84,11 @@ namespace CMLeonOS
Console.WriteLine(" cat <file> - Display file content"); Console.WriteLine(" cat <file> - Display file content");
Console.WriteLine(" echo <text> > <file> - Write text to file"); Console.WriteLine(" echo <text> > <file> - Write text to file");
Console.WriteLine(" cpass - Change password"); Console.WriteLine(" cpass - Change password");
Console.WriteLine(" head <file> - Display first lines of file");
Console.WriteLine(" Usage: head <file> <lines>");
Console.WriteLine(" tail <file> - Display last lines of file");
Console.WriteLine(" Usage: tail <file> <lines>");
Console.WriteLine(" wc <file> - Count lines, words, characters");
Console.WriteLine(" version - Show OS version"); Console.WriteLine(" version - Show OS version");
Console.WriteLine(" about - Show about information"); Console.WriteLine(" about - Show about information");
Console.WriteLine(" help - Show this help message"); Console.WriteLine(" help - Show this help message");
@@ -212,6 +217,15 @@ namespace CMLeonOS
case "cpass": case "cpass":
userSystem.ChangePassword(); userSystem.ChangePassword();
break; break;
case "head":
HeadFile(args);
break;
case "tail":
TailFile(args);
break;
case "wc":
WordCount(args);
break;
default: default:
Console.WriteLine($"Unknown command: {command}"); Console.WriteLine($"Unknown command: {command}");
break; break;
@@ -483,5 +497,141 @@ namespace CMLeonOS
Console.WriteLine($"Error starting editor: {ex.Message}"); Console.WriteLine($"Error starting editor: {ex.Message}");
} }
} }
private void HeadFile(string args)
{
if (string.IsNullOrEmpty(args))
{
Console.WriteLine("Error: Please specify a file name");
return;
}
try
{
string[] parts = args.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
string fileName = parts[0];
int lineCount = 10; // 默认显示10行
if (parts.Length > 1)
{
if (int.TryParse(parts[1], out int count))
{
lineCount = count;
}
}
string content = fileSystem.ReadFile(fileName);
if (string.IsNullOrEmpty(content))
{
Console.WriteLine("File is empty");
return;
}
string[] lines = content.Split(new string[] { "\r\n", "\n" }, StringSplitOptions.None);
int displayLines = Math.Min(lineCount, lines.Length);
Console.WriteLine($"First {displayLines} lines of {fileName}:");
Console.WriteLine("--------------------------------");
for (int i = 0; i < displayLines; i++)
{
Console.WriteLine($"{i + 1}: {lines[i]}");
}
}
catch (Exception ex)
{
Console.WriteLine($"Error reading file: {ex.Message}");
}
}
private void TailFile(string args)
{
if (string.IsNullOrEmpty(args))
{
Console.WriteLine("Error: Please specify a file name");
return;
}
try
{
string[] parts = args.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
string fileName = parts[0];
int lineCount = 10; // 默认显示10行
if (parts.Length > 1)
{
if (int.TryParse(parts[1], out int count))
{
lineCount = count;
}
}
string content = fileSystem.ReadFile(fileName);
if (string.IsNullOrEmpty(content))
{
Console.WriteLine("File is empty");
return;
}
string[] lines = content.Split(new string[] { "\r\n", "\n" }, StringSplitOptions.None);
int displayLines = Math.Min(lineCount, lines.Length);
int startLine = Math.Max(0, lines.Length - displayLines);
Console.WriteLine($"Last {displayLines} lines of {fileName}:");
Console.WriteLine("--------------------------------");
for (int i = startLine; i < lines.Length; i++)
{
Console.WriteLine($"{i + 1}: {lines[i]}");
}
}
catch (Exception ex)
{
Console.WriteLine($"Error reading file: {ex.Message}");
}
}
private void WordCount(string args)
{
if (string.IsNullOrEmpty(args))
{
Console.WriteLine("Error: Please specify a file name");
return;
}
try
{
string content = fileSystem.ReadFile(args);
if (string.IsNullOrEmpty(content))
{
Console.WriteLine("File is empty");
return;
}
string[] lines = content.Split(new string[] { "\r\n", "\n" }, StringSplitOptions.None);
int lineCount = lines.Length;
int wordCount = 0;
int charCount = content.Length;
foreach (string line in lines)
{
if (!string.IsNullOrWhiteSpace(line))
{
string[] words = line.Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
wordCount += words.Length;
}
}
Console.WriteLine($"Word count for {args}:");
Console.WriteLine("--------------------------------");
Console.WriteLine($"Lines: {lineCount}");
Console.WriteLine($"Words: {wordCount}");
Console.WriteLine($"Characters: {charCount}");
}
catch (Exception ex)
{
Console.WriteLine($"Error reading file: {ex.Message}");
}
}
} }
} }