1.2.7.4.8 SYS_FS_FileRead Function

size_t SYS_FS_FileRead
(
    SYS_FS_HANDLE handle,
    void *buf,
    size_t nbyte
);

Read data from the file.

This function attempts to read nbyte bytes of data from the file associated with the file handle into the buffer pointed to by buf.

A valid file handle must be obtained before reading a file.

On success - returns the number of bytes read successfully(0 or positive number).

On failure - returns -1. The reason for the failure can be retrieved with SYS_FS_Error or SYS_FS_FileError.

...
char CACHE_ALIGN buf[256];
size_t nbytes;
size_t bytes_read;
SYS_FS_HANDLE fileHandle;

fileHandle = SYS_FS_FileOpen("/mnt/myDrive/FILE.txt", (SYS_FS_FILE_OPEN_READ));

if(fileHandle != SYS_FS_HANDLE_INVALID)
{
    // File open is successful
}

nbytes = sizeof(buf);

bytes_read = SYS_FS_FileRead(fileHandle, buf, nbytes);

None.