Fix findfirst

src/ff.c

@@ -4429,6 +4429,7 @@ FRESULT f_findnext (
 /*-----------------------------------------------------------------------*/
 
 FRESULT f_findfirst (
+    FATFS *fatfs,
     DIR* dp,                /* Pointer to the blank directory object */
     FILINFO* fno,           /* Pointer to the file information structure */
     const TCHAR* path,      /* Pointer to the directory to open */
@@ -4439,7 +4440,7 @@ FRESULT f_findfirst (
 
 
     dp->pat = pattern;      /* Save pointer to pattern string */
-    res = f_opendir(dp, path);      /* Open the target directory */
+    res = f_opendir(fatfs, dp, path);      /* Open the target directory */
     if (res == FR_OK) {
         res = f_findnext(dp, fno);  /* Find the first item */
     }

src/ff.h

@@ -289,7 +289,7 @@ FRESULT f_sync (FIL* fp);                                           /* Flush cac
 FRESULT f_opendir (FATFS *fs, FF_DIR* dp, const TCHAR* path);       /* Open a directory */
 FRESULT f_closedir (FF_DIR* dp);                                    /* Close an open directory */
 FRESULT f_readdir (FF_DIR* dp, FILINFO* fno);                       /* Read a directory item */
-FRESULT f_findfirst (FF_DIR* dp, FILINFO* fno, const TCHAR* path, const TCHAR* pattern); /* Find first file */
+FRESULT f_findfirst (FATFS* fs, FF_DIR* dp, FILINFO* fno, const TCHAR* path, const TCHAR* pattern); /* Find first file */
 FRESULT f_findnext (FF_DIR* dp, FILINFO* fno);                      /* Find next file */
 FRESULT f_mkdir (FATFS *fs, const TCHAR* path);                     /* Create a sub directory */
 FRESULT f_unlink (FATFS *fs, const TCHAR* path);                    /* Delete an existing file or directory */

tests/fatfs1.c

@@ -57,6 +57,15 @@ DWORD get_fattime(void) {
     return 0;
 }
 
+static void print_filinfo(const char *msg, FRESULT res, FILINFO *fno) {
+    #if FF_USE_LFN
+    // note: lfname is empty string if it fits in 12 chars in fname
+    printf("readdir res=%d size=%u name=/%s/ lname=/%s/\n", res, fno->fsize, fno->altname, fno->fname);
+    #else
+    printf("readdir res=%d size=%u name=/%s/\n", res, fno->fsize, fno->fname);
+    #endif
+}
+
 int main() {
     struct _bdev_t bdev = {0};
     FATFS fatfs;
@@ -172,12 +181,23 @@ int main() {
             if (res != FR_OK || fno.fname[0] == 0) {
                 break;
             }
-            #if FF_USE_LFN
-            // note: lfname is empty string if it fits in 12 chars in fname
-            printf("readdir res=%d size=%u name=/%s/ lname=/%s/\n", res, fno.fsize, fno.altname, fno.fname);
-            #else
-            printf("readdir res=%d size=%u name=/%s/\n", res, fno.fsize, fno.fname);
-            #endif
+            print_filinfo("readdir", res, &fno);
+        }
+        res = f_closedir(&dp);
+        printf("closedir res=%d\n", res);
+    }
+
+    printf("== FIND FIRST ==\n");
+    {
+        FF_DIR dp;
+        FILINFO fno;
+        FRESULT res = f_findfirst(&fatfs, &dp, &fno, "/", "*.txt");
+        for (;;) {
+            if (res != FR_OK || fno.fname[0] == 0) {
+                break;
+            }
+            print_filinfo("findfirst", res, &fno);
+            res = f_findnext(&dp, &fno);
         }
         res = f_closedir(&dp);
         printf("closedir res=%d\n", res);

tests/fatfs1.exp

@@ -164,6 +164,16 @@ readdir res=0 size=0 name=/DIR/ lname=/dir/
 disk_ioctl(0, 6)
 disk_ioctl(0, 6)
 closedir res=0
+== FIND FIRST ==
+disk_ioctl(0, 6)
+disk_ioctl(0, 6)
+readdir res=0 size=10 name=/TEST.TXT/ lname=/test.txt/
+disk_ioctl(0, 6)
+readdir res=0 size=1000 name=/FILENA~1.TXT/ lname=/filename-that-is-long.txt/
+disk_ioctl(0, 6)
+disk_ioctl(0, 6)
+disk_ioctl(0, 6)
+closedir res=0
 == RENAME FILE ==
 disk_ioctl(0, 6)
 disk_write(0, 2, 1, 0xcdb1e73c)

tests/fatfs1_conf.h

@@ -2,7 +2,7 @@
 #define FF_FS_READONLY      0
 #define FF_FS_MINIMIZE      0
 #define FF_USE_STRFUNC      0
-#define FF_USE_FIND         0
+#define FF_USE_FIND         1
 #define FF_USE_MKFS         1
 #define FF_USE_FASTSEEK     0
 #define FF_USE_EXPAND       0