cat(1) can now cat files.

utils/cat.cpp

@@ -1,8 +1,41 @@
 #include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
 #include <libmaxsi/sortix-keyboard.h>
 
+int cat(int argc, char* argv[])
+{
+	int result = 0;
+
+	for ( int i = 1; i < argc; i++ )
+	{
+		int fd = open(argv[i], O_RDONLY);
+		if ( fd < 0 ) { printf("%s: unable to open: %s\n", argv[0], argv[i]); result = 1; continue; }
+
+		do
+		{
+			const size_t BUFFER_SIZE = 255;
+			char buffer[BUFFER_SIZE+1];
+			ssize_t bytesread = read(fd, buffer, BUFFER_SIZE);
+			if ( bytesread == 0 ) { break; }
+			if ( bytesread < 0 ) { printf("%s: read failed: %s\n", argv[0], argv[i]); result = 1; break; }
+			buffer[bytesread] = 0;
+			printf("%s", buffer);
+		} while ( true );
+
+		close(fd);
+	}
+
+	return result;
+}
+
 int main(int argc, char* argv[])
 {
+	if ( 1 < argc )
+	{
+		return cat(argc, argv);
+	}
+
 	bool lastwasesc = false;
 
 	while (true)