/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2011 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
+ * Copyright (C) 2002-2018 Aleph One Ltd.
*
* Created by Charles Manning <charles@aleph1.co.uk>
*
#include "string.h"
+#define YAFFS_MAX_RW_SIZE 0x70000000
#define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5
#ifndef NULL
is_dir = (obj->variant_type ==
YAFFS_OBJECT_TYPE_DIRECTORY);
- /* A directory can't be opened except for read */
- if ( is_dir &&
- (writeRequested || !readRequested || rwflags != O_RDONLY)) {
- openDenied = __LINE__;
- yaffsfs_SetError(-EISDIR);
- errorReported = __LINE__;
+ /*
+ * A directory can't be opened except for read, so we
+ * ignore other flags
+ */
+ if (is_dir) {
+ writeRequested = 0;
+ readRequested = 1;
+ rwflags = O_RDONLY;
}
if(is_dir) {
/* Not a reading handle */
yaffsfs_SetError(-EINVAL);
totalRead = -1;
- } else if (nbyte > YAFFS_MAX_FILE_SIZE) {
+ } else if (nbyte > YAFFS_MAX_RW_SIZE) {
yaffsfs_SetError(-EINVAL);
totalRead = -1;
} else {
endPos = pos + nbyte;
if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
- nbyte > YAFFS_MAX_FILE_SIZE ||
+ nbyte > YAFFS_MAX_RW_SIZE ||
endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
totalRead = -1;
nbyte = 0;
while (nbyte > 0) {
nToRead = YAFFSFS_RW_SIZE -
(pos & (YAFFSFS_RW_SIZE - 1));
- if (nToRead > nbyte)
+ if (nToRead > (int)nbyte)
nToRead = nbyte;
/* Tricky bit...
endPos = pos + nbyte;
if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
- nbyte > YAFFS_MAX_FILE_SIZE ||
+ nbyte > YAFFS_MAX_RW_SIZE ||
endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
totalWritten = -1;
nbyte = 0;
nToWrite = YAFFSFS_RW_SIZE -
(pos & (YAFFSFS_RW_SIZE - 1));
- if (nToWrite > nbyte)
+ if (nToWrite > (int)nbyte)
nToWrite = nbyte;
/* Tricky bit...
{
struct yaffsfs_FileDes *fdp = yaffsfs_HandleToFileDes(fd);
int retVal;
-
+
yaffsfs_Lock();
if(!flags || !fdp) {
*flags = O_RDONLY;
retVal = 0;
}
-
+
yaffsfs_Unlock();
return retVal;
}
obj = yaffs_get_equivalent_obj(obj);
if (obj && buf) {
- buf->st_dev = (int)obj->my_dev->os_context;
+ buf->st_dev = 0;
buf->st_ino = obj->obj_id;
buf->st_mode = obj->yst_mode & ~S_IFMT;
}
#if !CONFIG_YAFFS_WINCE
+ // if the the buffer is null then create one with the fields set to the current time.
if (!buf) {
local.actime = Y_CURRENT_TIME;
local.modtime = local.actime;
buf = &local;
}
+ // copy the buffer's time into the obj.
if (obj) {
int result;
obj->yst_atime = buf->actime;
obj->yst_mtime = buf->modtime;
+
+ // set the obj to dirty to cause it to be written to flash during the next flush operation.
obj->dirty = 1;
result = yaffs_flush_file(obj, 0, 0, 0);
retVal = result == YAFFS_OK ? 0 : -1;
int force, int read_only)
{
int retVal = -1;
+ int was_read_only;
if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
yaffsfs_SetError(-EFAULT);
if (force || !yaffsfs_IsDevBusy(dev)) {
if (read_only)
yaffs_checkpoint_save(dev);
+ was_read_only = dev->read_only;
dev->read_only = read_only ? 1 : 0;
+ if (was_read_only && !read_only) {
+ yaffs_guts_cleanup(dev);
+ }
retVal = 0;
} else
yaffsfs_SetError(-EBUSY);
{
int retVal = -1;
- if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
- yaffsfs_SetError(-EFAULT);
- return -1;
- }
- if (yaffsfs_CheckPath(path) < 0) {
- yaffsfs_SetError(-ENAMETOOLONG);
- return -1;
+ if (!dev) {
+ if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
+ if (yaffsfs_CheckPath(path) < 0) {
+ yaffsfs_SetError(-ENAMETOOLONG);
+ return -1;
+ }
}
yaffsfs_Lock();
if (dsc->nextReturn) {
dsc->de.d_ino =
yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id;
- dsc->de.d_dont_use = (unsigned)dsc->nextReturn;
+ dsc->de.d_dont_use = 0;
dsc->de.d_off = dsc->offset++;
yaffs_get_obj_name(dsc->nextReturn,
dsc->de.d_name, NAME_MAX);
yaffsfs_Lock();
f = yaffsfs_HandleToFileDes(fd);
- if(f && f->isDir)
+ if(f && f->isDir && f->v.dir)
ret = yaffsfs_readdir_no_lock(f->v.dir);
yaffsfs_Unlock();
return ret;