DOKK / manpages / debian 11 / libexplain-dev / explain_select_or_die.3.en
explain_select_or_die(3) Library Functions Manual explain_select_or_die(3)

explain_select_or_die - blah blah and report errors

#include <libexplain/select.h>

void explain_select_or_die(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);

The explain_select_or_die function is used to call the select(2) system call. On failure an explanation will be printed to stderr, obtained from explain_select(3), and then the process terminates by calling exit(EXIT_FAILURE).

This function is intended to be used in a fashion similar to the following example:

explain_select_or_die(nfds, readfds, writefds, exceptfds, timeout);
The nfds, exactly as to be passed to the select(2) system call.
The readfds, exactly as to be passed to the select(2) system call.
The writefds, exactly as to be passed to the select(2) system call.
The exceptfds, exactly as to be passed to the select(2) system call.
The timeout, exactly as to be passed to the select(2) system call.
This function only returns on success. On failure, prints an explanation and exits.

select(2)
blah blah
explain_select(3)
explain select(2) errors
exit(2)
terminate the calling process

libexplain version 1.4
Copyright (C) 2008 Peter Miller