Bug fix: renaming a directory could cause a name clash. New feature: rename() can now move files/directories as well.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5008 a1c6a512-1295-4272-9138-f99709370657

firmware/common/file.c

@@ -277,12 +277,16 @@ int remove(const char* name)
 int rename(const char* path, const char* newpath)
 {
     int rc, fd;
+    DIR* dir;
     char* nameptr;
+    char* dirptr;
     struct filedesc* file;
+    char newpath2[MAX_PATH];
 
     /* verify new path does not already exist */
+    /* If it is a directory, errno == EISDIR if the name exists */
     fd = open(newpath, O_RDONLY);
-    if ( fd >= 0 ) {
+    if ( fd >= 0 || errno == EISDIR) {
         close(fd);
         errno = EBUSY;
         return -1;
@@ -295,25 +299,51 @@ int rename(const char* path, const char* newpath)
         return fd * 10 - 2;
     }
 
-    /* strip path */
+    /* extract new file name */
     nameptr = strrchr(newpath,'/');
     if (nameptr)
         nameptr++;
     else
-        nameptr = (char*)newpath;
+        return - 3;
 
+    /* Extract new path */
+    strcpy(newpath2, newpath);
+    
+    dirptr = strrchr(newpath2,'/');
+    if(dirptr)
+        *dirptr = 0;
+    else
+        return - 4;
+
+    dirptr = newpath2;
+    
+    if(strlen(dirptr) == 0) {
+        dirptr = "/";
+    }
+    
+    dir = opendir(dirptr);
+    if(!dir)
+        return - 5;
+    
     file = &openfiles[fd];
-    rc = fat_rename(&file->fatfile, nameptr, file->size, file->attr);
+    rc = fat_rename(&file->fatfile, &dir->fatdir, nameptr,
+                    file->size, file->attr);
     if ( rc < 0 ) {
         DEBUGF("Failed renaming file: %d\n", rc);
         errno = EIO;
-        return rc * 10 - 3;
+        return rc * 10 - 6;
     }
 
     rc = close(fd);
     if (rc<0) {
         errno = EIO;
-        return rc * 10 - 4;
+        return rc * 10 - 7;
+    }
+
+    rc = closedir(dir);
+    if (rc<0) {
+        errno = EIO;
+        return rc * 10 - 8;
     }
 
     return 0;

firmware/drivers/fat.c

@@ -1551,12 +1551,13 @@ int fat_remove(struct fat_file* file)
 }
 
 int fat_rename(struct fat_file* file, 
-               const unsigned char* newname,
-               int size,
-               int attr)
+                struct fat_dir* dir, 
+                const unsigned char* newname,
+                int size,
+                int attr)
 {
     int rc;
-    struct fat_dir dir;
+    struct fat_dir olddir;
     struct fat_file newfile = *file;
 
     if ( !file->dircluster ) {
@@ -1565,12 +1566,12 @@ int fat_rename(struct fat_file* file,
     }
 
     /* create a temporary file handle */
-    rc = fat_opendir(&dir, file->dircluster, NULL);
+    rc = fat_opendir(&olddir, file->dircluster, NULL);
     if (rc < 0)
         return rc * 10 - 2;
 
     /* create new name */
-    rc = add_dir_entry(&dir, &newfile, newname, false, false);
+    rc = add_dir_entry(dir, &newfile, newname, false, false);
     if (rc < 0)
         return rc * 10 - 3;
 

firmware/export/fat.h

@@ -89,6 +89,7 @@ extern int fat_seek(struct fat_file *ent, unsigned int sector );
 extern int fat_remove(struct fat_file *ent);
 extern int fat_truncate(const struct fat_file *ent);
 extern int fat_rename(struct fat_file* file, 
+                      struct fat_dir* dir, 
                       const unsigned char* newname,
                       int size, int attr);