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fs/smartfs: Fix file size corruption when opening with overwriting mode

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If a existing file is opened with overwriting mode e.g. fopen(file, "w+"),
the file size will be incorrect after writing any data to the file.
This bug is caused by previous commit 10903b5, and its changes should be
limited to only O_APPEND mode.
This commit is contained in:
SPRESENSE 2020-07-22 14:41:40 +09:00 committed by Xiang Xiao
parent 172aaa5e5c
commit 89a79b03cf
1 changed files with 3 additions and 2 deletions
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5
fs/smartfs/smartfs_smart.c
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@ -331,10 +331,11 @@ static int smartfs_open(FAR struct file *filep, const char *relpath,
/* When using sector buffering, current sector with its header should /* When using sector buffering, current sector with its header should
* always be present in sf->buffer. Otherwise data corruption may arise * always be present in sf->buffer. Otherwise data corruption may arise
* when writing. * when writing. However, this does not apply when overwriting without
* append mode.
*/ */
if (sf->currsector != SMARTFS_ERASEDSTATE_16BIT) if ((sf->currsector != SMARTFS_ERASEDSTATE_16BIT) && (oflags & O_APPEND))
{ {
readwrite.logsector = sf->currsector; readwrite.logsector = sf->currsector;
readwrite.offset = 0; readwrite.offset = 0;