int
cfs_open (const char *name, int flags)
{
eint8 mode;
int fd;
if (sdcard_efs.myCard.sectorCount == 0) return -1;
fd = find_free_fd();
if (fd < 0) return -1;
if (flags == CFS_READ) {
mode = MODE_READ;
} else {
mode = MODE_APPEND;
}
if (file_fopen(&file_descriptors[fd], &sdcard_efs.myFs,
(char*)name, mode) < 0) {
return -1;
}
return fd;
}
/*
* open_file()
* Function: Checks if a file is valid and opens it
* Inputs: fname, charstring of the dentry to search for
* Effect: Initializes the file_array[8] depending on the file to be opened
* Returns: fd, the index of the newly created file descriptor (success)
* -1, if we could not find a empty file decriptor in file_array[8]
*/
uint32_t open_file(const uint8_t *fname)
{
int check_file=read_dentry_by_name(fname, &dentry);
//checks for valid file
if (dentry.fname == NULL || check_file == -1)
{
return -1;
}
uint32_t fd = find_free_fd( current_pcb );
if(fd==-1)
return -1;
if(dentry.ftype==FILE_TYPE_RTC) //user level access to rtc
{
((current_pcb->file_array)[fd]).file_ops = &rtc_ops;
current_pcb->file_array[fd].inode_ptr=0;
current_pcb->file_array[fd].file_position=0;
current_pcb->file_array[fd].flags=FILE_IN_USE;
}
else if(dentry.ftype==FILE_TYPE_DIR) //file type is directory
{
((current_pcb->file_array)[fd]).file_ops = &file_ops;
current_pcb->file_array[fd].inode_ptr=0;
current_pcb->file_array[fd].file_position=0;
current_pcb->file_array[fd].flags=FILE_IN_USE;
}
else if(dentry.ftype==FILE_TYPE_REG) //file type is regular
{
((current_pcb->file_array)[fd]).file_ops = &file_ops;
current_pcb->file_array[fd].inode_ptr=(int32_t*)&inodes_array[dentry.inode];
current_pcb->file_array[fd].file_position=0;
current_pcb->file_array[fd].flags=FILE_IN_USE;
}
return fd;
}
