Update limit values

mentos/inc/libc/limits.h

@@ -39,3 +39,9 @@
 
 /// Maximum value a `signed long int' can hold.
 #define LONG_MIN (-LONG_MAX - 1L)
+
+/// Maximum number of characters in a file name.
+#define NAME_MAX 255
+
+/// Maximum number of characters in a path name.
+#define PATH_MAX 4096

mentos/inc/process/process.h

@@ -17,6 +17,7 @@
 #include "unistd.h"
 #include "list_head.h"
 #include "signal_defs.h"
+#include "limits.h"
 
 /// The maximum length of a name for a task_struct.
 #define TASK_NAME_MAX_LENGTH 100
@@ -170,7 +171,7 @@ typedef struct task_struct {
 	int error_no;
 
 	/// The current working directory.
-	char cwd[MAX_PATH_LENGTH];
+	char cwd[PATH_MAX];
 
 	//==== Future work =========================================================
 	// - task's attributes:

mentos/inc/sys/dirent.h

@@ -7,9 +7,7 @@
 #pragma once
 
 #include "stddef.h"
-
-/// The maximum length for a name.
-#define NAME_MAX 30
+#include "limits.h"
 
 /// @brief Contains the entries of a directory.
 typedef struct dirent_t {

mentos/inc/ui/shell/shell.h

@@ -8,6 +8,7 @@
 
 #include "stdint.h"
 #include "kernel.h"
+#include "limits.h"
 
 /// Maximum length of credentials.
 #define CREDENTIALS_LENGTH  50
@@ -55,7 +56,7 @@ typedef struct userenv_t
     char username[CREDENTIALS_LENGTH];
 
     /// The current path.
-    char cur_path[MAX_PATH_LENGTH];
+    char cur_path[PATH_MAX];
 
     /// The user identifier.
     unsigned int uid;