?? fig18.22
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#include "apue.h"#include <termios.h>#ifndef TIOCGWINSZ#include <sys/ioctl.h>#endifstatic voidpr_winsize(int fd){ struct winsize size; if (ioctl(fd, TIOCGWINSZ, (char *) &size) < 0) err_sys("TIOCGWINSZ error"); printf("%d rows, %d columns\n", size.ws_row, size.ws_col);}static voidsig_winch(int signo){ printf("SIGWINCH received\n"); pr_winsize(STDIN_FILENO);}intmain(void){ if (isatty(STDIN_FILENO) == 0) exit(1); if (signal(SIGWINCH, sig_winch) == SIG_ERR) err_sys("signal error"); pr_winsize(STDIN_FILENO); /* print initial size */ for ( ; ; ) /* and sleep forever */ pause();}
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