/*
+------------------------------------------------------------------------------
| Function : read
+------------------------------------------------------------------------------
| Description :
|
| Parameters :
| Returns :
|
+------------------------------------------------------------------------------
*/
int read(int fd, char *buf, int len)
{
int result;
struct dfs_fd* d;
/* get the fd */
d = fd_get(fd);
if (d == RT_NULL)
{
rt_set_errno(-RT_ERROR);
return -1;
}
result = dfile_raw_read(d, buf, len);
if (result < 0)
{
rt_set_errno(result);
fd_put(d);
return -1;
}
/* release the ref-count of fd */
fd_put(d);
return result;
}
void __cat(const char* filename)
{
rt_uint32_t length;
char buffer[81];
if (dfile_raw_open(&fd, filename, DFS_O_RDONLY) < 0)
{
rt_kprintf("Open %s failed\n", filename);
return;
}
do
{
rt_memset(buffer, 0, sizeof(buffer));
length = dfile_raw_read(&fd, buffer, 81);
if (length > 0)
{
rt_kprintf("%s", buffer);
}
}while (length > 0);
dfile_raw_close(&fd);
}