10-11-2005
Use the select() system call to wait for the fd to become readable. You can specify a timeout to select and the return code tells you what happened. Then read the entire expected number of bytes. You will probably get too few. So read the rest. Continue until you have all the bytes you need. Reading a byte at a time is not very efficient. If needed you can use select() in front of each read() so that the program never hangs on a read.
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