linux - Display socket options -

How can I see from the shell how the socket options are set? Especially I find it interesting to know if SO_BROADCAST is set up?

You can use if the PID is the process id and < Code> FD is a file descriptor number of the socket of your interest, so you can:

  LSOF-A-P PID-D FD-T F /  
 To list all IPv4 sockets of a process:  
  LSOF-A-P PID - I 4 -T f  
 
 this will print the socket option with a  SO = , other go Note the officer that you do not set any options, you will be an empty string, so you'll see something like  SO = PQLEN = 0  etc. To test for  SO_BROADCAST , just type  SO =  after the string  SO_BROADCAST  for grep, for example 
 
  If lsof -a -p PID -d FD-T f | Grep -q 'SO = [^ =] * SO_BROADCAST'; So #Socket is SO_BROADCAST and #, it is not