How does select work in Linux? select() works by blocking until something happens on a file descriptor (aka a socket). What’s ‘something’? Data coming in or being able to write to a file descriptor — you tell select() what you want to be woken up by.
How do I select in Linux? Click at the start of the text you want to select. Scroll the window to the end of the text you want select. Shift + click the end of your selection. All text between your first click and your last Shift + click is now selected.
What is select system call in Linux? The select() system call enables a system to keep track of several file descriptors. So, the select system call waits for one of the descriptors or a whole to turn out to be “ready” for a particular type of I/O activity (e.g., input possible).
What does select () do in C? The select() function indicates which of the specified file descriptors is ready for reading, ready for writing, or has an error condition pending.