fix: ensure tab completion is not reliant on single-digit volume number

kernel/src/Api/BuildNo.hpp

@@ -12,4 +12,4 @@
 
 #pragma once
 
-#define MONTAUK_BUILD_NUMBER 76
+#define MONTAUK_BUILD_NUMBER 79

programs/src/shell/tabcompletion.cpp

@@ -26,6 +26,20 @@ bool is_executable(const char* path) {
 	return false;
 }
 
+int find_first_slash_pos(const char* string) {
+	int i = 0;
+
+	while (string[i] != '\0') {
+		if (string[i] == '/') {
+			return i;
+		}
+
+		i++;
+	}
+
+	return -1;
+}
+
 /*
 	i.e., "shell.elf" => "shell"
 */
@@ -51,19 +65,23 @@ int get_completions(		// returns no. of results
 
 	for (int i = 0; i < n; i++) {
 		/*
-			Shift by 3 characters (names[i] + 3):
+			Shift by n characters (names[i] + n),
-				"os/shell.elf" => "shell.elf"
+			n = position of first slash in path + 1:
+			
+			"os/shell.elf" => "shell.elf"
 
 			This is somewhat of a workaround. 
 		*/
-		if (montauk::starts_with(names[i] + 3, (const char*)string)) {
+		int inc = find_first_slash_pos(names[i]) + 1;
+
+		if (montauk::starts_with(names[i] + inc, (const char*)string)) {
 			if (r > arrayMax)
 				break;
 
 			if (!is_executable(names[i]))
 				continue;
 
-			char* p = (char *)names[i] + 3;
+			char* p = (char *)names[i] + inc;
 			strip_elf_extension(p);
 
 			array[r] = (char *)p;