[LCP]read - serial port programming

[Bill Rausch]

At 5:50 -0700 5/14/03, michael bosu wrote:
>Hi,
>
>Please to read from the serial port, what does the
>function read return. For instance if the code below
>return 8 for count. Does that mean the number of bytes
>is 8 or what?
>
>Also if I want to get the actual bytes received how do
>I go about it.
>
>
>if ((count = read(fd, &vbuf[vlen], BUFFERSIZE - vlen))
>== -1) {
>	     
>                perror("read");
>	     	exit(1);
>     
>	}
>
>Thank you,
>Michael mfbosu at yahoo.com

Read the man pages.  "man read"  If that isn't understandable, get a 
good book.  ;)

Yes, read() returns the number of bytes read.  They are stored in the 
buffer you supply.  In the example above, the first byte read would 
be at vbuf[vlen], the next at vbuf[vlen+1], etc.


-- 
"Try to learn something about everything and everything about 
something." (Thomas H. Huxley)