Visit Our UNIX and Linux User Community


fd_set


 
Thread Tools Search this Thread
Top Forums Programming fd_set
# 1  
Old 03-06-2002
Question fd_set

we can use FD_SET to set the file descriptors
in fd_set. Using, FD_ISSET we can check whether
they are set or not...

Is there any way can we print the values of fd_set
structure..if so please tell me huv to do it..

since by using FD_SET we will be marking fd_set
structure..can we print what we are setting


any pointers can help
# 2  
Old 03-06-2002
Loop from 0 to FD_SETSIZE testing each bit with FD_ISSET. If it is set, print out a message. That will tell you which fd's are in the structure. Isn't that good enough? A portable program should not depending on the internal layout of the structure.

Previous Thread | Next Thread
Test Your Knowledge in Computers #239
Difficulty: Easy
In March 1970, the ARPANET reached the East Coast of the United States, when an IMP at the Department of Energy in Washington, DC was connected to the network.
True or False?

1 More Discussions You Might Find Interesting

1. Programming

Errors with select(), FD_SET, FD_ZERO

I am trying to use select() in a serial port application. I am using select() to signal when there is data available on the port. This seems simple enough to me but I am getting a basic error. When I call FD_ZERO or FD_SET I get an error message: errno 29: Illegal Seek Code: fd_set... (0 Replies)
Discussion started by: rov1
0 Replies

Featured Tech Videos