Port fat_io_lib, mount atasd0mp1 as sys:

kernel/std/string.c

@@ -14,7 +14,7 @@ void *memcpy(void *dst, const void *src, size_t n) {
   return dst;
 }
 
-size_t strlen(char *s) {
+size_t strlen(const char *s) {
   char *s2;
   for (s2 = s; *s2; ++s2);
   return (s2 - s);
@@ -149,3 +149,27 @@ char *strcat(char *dest, const char *src) {
   dest[i+j] = '\0';
   return dest;
 }
+
+int strncmp( const char * s1, const char * s2, size_t n )
+{
+    while ( n && *s1 && ( *s1 == *s2 ) )
+    {
+        ++s1;
+        ++s2;
+        --n;
+    }
+    if ( n == 0 )
+    {
+        return 0;
+    }
+    else
+    {
+        return ( *(unsigned char *)s1 - *(unsigned char *)s2 );
+    }
+}
+
+void strncpy( char* _dst, const char* _src, size_t _n )
+{
+   size_t i = 0;
+   while(i++ != _n && (*_dst++ = *_src++));
+}