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openharmony_kernel_liteos_m
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Add already opened file logic

This commit is contained in:
li_zan 2021-05-08 15:14:45 +08:00
parent 4aeaf030a2
commit 3a4a8b0680
1 changed files with 4 additions and 5 deletions
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9
components/fs/littlefs/lfs_api.c
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@ -68,18 +68,16 @@ LittleFsHandleStruct *GetFreeFd(const char *fileName, int *fd)
return NULL;
}
bool CheckFileIsOpen(const char *fileName, int *fd)
bool CheckFileIsOpen(const char *fileName)
{
for (int i = 0; i < LITTLE_FS_MAX_OPEN_FILES; i++) {
if (g_handle[i].useFlag == 1) {
if (strcmp(g_handle[i].pathName, fileName) == 0) {
*fd = i;
return true;
}
}
}
*fd = INVALID_FD;
return false;
}
@ -230,8 +228,9 @@ int LfsOpen(const char *pathName, int openFlag, int mode)
{
int fd = INVALID_FD;
if (CheckFileIsOpen(pathName, &fd)) {
return fd;
// if file is already open, return invalid fd
if (CheckFileIsOpen(pathName)) {
goto errout;
}
LittleFsHandleStruct *fsHandle = GetFreeFd(pathName, &fd);