Fix errors, add fatfs modified time

CMakeLists.txt

@@ -108,7 +108,7 @@ target_include_directories(filesystem_vfs INTERFACE
   ${CMAKE_CURRENT_LIST_DIR}/include
 )
 target_compile_options(filesystem_vfs INTERFACE -Werror -Wall -Wextra -Wnull-dereference)
-target_link_libraries(filesystem_vfs INTERFACE pico_sync)
+target_link_libraries(filesystem_vfs INTERFACE pico_sync -Wl,--wrap=_ftello_r)
 
 # Default file system library
 add_library(filesystem_default INTERFACE)

include/filesystem/filesystem.h

@@ -17,10 +17,9 @@ extern "C" {
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <limits.h>
 #include "blockdevice/blockdevice.h"
 
-#define PATH_MAX   256
-
 enum {
     FILESYSTEM_TYPE_FAT,
     FILESYSTEM_TYPE_LITTLEFS,

src/filesystem/fat.c

@@ -396,12 +396,22 @@ static int file_stat(filesystem_t *fs, const char *path, struct stat *st) {
     if (res != FR_OK) {
         return fat_error_remap(res);
     }
+
+    struct tm mtime = {0};
+    mtime.tm_year = (f.fdate >> 9) + 80;
+    mtime.tm_mon = ((f.fdate >> 5) & 0b1111) - 1;
+    mtime.tm_mday = f.fdate & 0b11111;
+    mtime.tm_hour = f.ftime >> 11;
+    mtime.tm_min = (f.ftime >> 5) & 0b111111;
+    mtime.tm_sec = (f.ftime & 0b11111) << 1;
+
     st->st_size = f.fsize;
     st->st_mode = 0;
     st->st_mode |= (f.fattrib & AM_DIR) ? S_IFDIR : S_IFREG;
     st->st_mode |= (f.fattrib & AM_RDO) ?
                    (S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) :
                    (S_IRWXU | S_IRWXG | S_IRWXO);
+    st->st_mtime = mktime(&mtime);
     return 0;
 }
 

src/filesystem/vfs.c

@@ -562,7 +562,7 @@ off_t _lseek(int fildes, off_t offset, int whence) {
     return _error_remap(pos);
 }
 
-off_t _ftello_r(struct _reent *ptr, register FILE *fp) {
+off_t __wrap__ftello_r(struct _reent *ptr, register FILE *fp) {
     (void)ptr;
     int fildes = fp->_file;
     auto_init_recursive_mutex(_mutex);