yaffs direct: Fix more error handling

[yaffs2.git] / direct / yaffsfs.c

diff --git a/direct/yaffsfs.c b/direct/yaffsfs.c
index c7937b075a04aa7f22410cef1139084446caf0bc..5194dd483f0c25e9568ce1913da20c9af1e86164 100644 (file)
--- a/direct/yaffsfs.c
+++ b/direct/yaffsfs.c
@@ -756,6 +756,13 @@ int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing)
                        if( writeRequested && !(obj->yst_mode & S_IWRITE))
                                openDenied = 1;
 
+                       if( !errorReported && writeRequested && 
+                               obj->my_dev->read_only){
+                               openDenied = 1;
+                               yaffsfs_SetError(-EROFS);
+                               errorReported = 1;
+                       }
+
                        if(openDenied && !errorReported ) {
                                /* Error if the file exists but permissions are refused. */
                                yaffsfs_SetError(-EACCES);
@@ -820,7 +827,7 @@ int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing)
                if(!obj && dir && !errorReported && (oflag & O_CREAT)) {
                        /* Let's see if we can create this file if it does not exist. */
                        if(dir->my_dev->read_only){
-                               yaffsfs_SetError(-EINVAL);
+                               yaffsfs_SetError(-EROFS);
                                errorReported = 1;
                        } else
                                obj = yaffs_create_file(dir,name,mode,0,0);
@@ -881,19 +888,23 @@ int yaffs_open(const YCHAR *path, int oflag, int mode)
 int yaffs_Dofsync(int fd,int datasync)
 {
        yaffsfs_Handle *h = NULL;
-       int retVal = 0;
+       int retVal = -1;
 
        yaffsfs_Lock();
 
        h = yaffsfs_GetHandlePointer(fd);
 
-       if(h && h->useCount > 0)
-               /* flush the file */
-               yaffs_flush_file(yaffsfs_inode[h->inodeId].iObj,1,datasync);
-       else {
-               /* bad handle */
+       if(!h || h->useCount < 1)
                yaffsfs_SetError(-EBADF);
-               retVal = -1;
+       else {
+               struct yaffs_obj * obj;
+               obj = yaffsfs_inode[h->inodeId].iObj;
+               if(obj->my_dev->read_only)
+                       yaffsfs_SetError(-EROFS);
+               else {          
+                       yaffs_flush_file(yaffsfs_inode[h->inodeId].iObj,1,datasync);
+                       retVal = 0;
+               }
        }
 
        yaffsfs_Unlock();
@@ -1081,9 +1092,12 @@ int yaffsfs_do_write(int fd, const void *vbuf, unsigned int nbyte, int isPwrite,
                /* bad handle */
                yaffsfs_SetError(-EBADF);
                totalWritten = -1;
-       } else if( h && obj && (!h->writing || obj->my_dev->read_only)){
+       } else if(!h->writing){
                yaffsfs_SetError(-EINVAL);
                totalWritten=-1;
+       } else if(obj->my_dev->read_only){
+               yaffsfs_SetError(-EROFS);
+               totalWritten=-1;
        } else {
                if(h->append)
                        startPos = yaffs_get_obj_length(obj);
@@ -1191,10 +1205,12 @@ int yaffs_truncate(const YCHAR *path,off_t new_size)
                yaffsfs_SetError(-ELOOP);
        else if(!dir || !obj)
                yaffsfs_SetError(-ENOENT);
+       else if(obj->my_dev->read_only)
+               yaffsfs_SetError(-EROFS);
        else if(obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
                yaffsfs_SetError(-EISDIR);
        else if(obj->my_dev->read_only)
-               yaffsfs_SetError(-EACCES);
+               yaffsfs_SetError(-EROFS);
        else if(new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
                yaffsfs_SetError(-EINVAL);
        else
@@ -1218,8 +1234,10 @@ int yaffs_ftruncate(int fd, off_t new_size)
        if(!h || !obj)
                /* bad handle */
                yaffsfs_SetError(-EBADF);
+       else if(!h->writing)
+               yaffsfs_SetError(-EINVAL);
        else if(obj->my_dev->read_only)
-               yaffsfs_SetError(-EACCES);
+               yaffsfs_SetError(-EROFS);
        else if( new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
                yaffsfs_SetError(-EINVAL);
        else
@@ -1303,7 +1321,7 @@ int yaffsfs_DoUnlink(const YCHAR *path,int isDirectory)
        else if(!obj)
                yaffsfs_SetError(-ENOENT);
        else if(obj->my_dev->read_only)
-               yaffsfs_SetError(-EINVAL);
+               yaffsfs_SetError(-EROFS);
        else if(!isDirectory && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
                yaffsfs_SetError(-EISDIR);
        else if(isDirectory && obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
@@ -2194,15 +2212,17 @@ int yaffs_sync(const YCHAR *path)
         yaffsfs_Lock();
         dev = yaffsfs_FindDevice(path,&dummy);
         if(dev){
-                if(dev->is_mounted){
+                if(!dev->is_mounted)
+                       yaffsfs_SetError(-EINVAL);
+               else if(dev->read_only)
+                       yaffsfs_SetError(-EROFS);
+               else {
                         
                         yaffs_flush_whole_cache(dev);
                         yaffs_checkpoint_save(dev);
                         retVal = 0;
                         
-                } else
-                        yaffsfs_SetError(-EINVAL);
-                        
+                }      
         }else
                 yaffsfs_SetError(-ENODEV);
 
@@ -2708,7 +2728,7 @@ int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath)
        else if(!obj_dir || !lnk_dir || !obj)
                yaffsfs_SetError(-ENOENT);
        else if(obj->my_dev->read_only)
-               yaffsfs_SetError(-EINVAL);
+               yaffsfs_SetError(-EROFS);
        else if(lnk)
                yaffsfs_SetError(-EEXIST);
        else if(lnk_dir->my_dev != obj->my_dev)