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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/select.h>
// utility to block until stdin has input
// public domain
int main(int argc, char *argv[]) {
fd_set readset;
FD_ZERO(&readset);
FD_SET(STDIN_FILENO, &readset);
if (select(1, &readset, NULL, NULL, NULL) == -1) {
perror(argv[0]);
return EXIT_FAILURE;
}
return 0;
}
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