Resizing The Terminal Window

[Michael B. Allen]

I'm trying to hone the resizing process so I've written a minimal
application derived from test/view.c to illustrate it. I have been
stuggling to find information on the topic so I would greatly appriciate
it if you could verify that the below code is indeed optimal and portable
(e.g. are all the conditional includes necessary?).

Thanks,
Mike

--8<--

#include <stdlib.h>
#include <signal.h>
#include <stdio.h>
#include <curses.h>

#if HAVE_TERMIOS_H
# include <termios.h>
#else
# include <sgtty.h>
#endif

#if !defined(sun) || !HAVE_TERMIOS_H
# if HAVE_SYS_IOCTL_H
#  include <sys/ioctl.h>
# endif
#endif

/* This is needed to compile 'struct winsize' */
#if NEED_PTEM_H
#include <sys/stream.h>
#include <sys/ptem.h>
#endif

static int interrupted;
static int waiting;

static void
show_all(void)
{
        /* 
        mvaddch(LINES - 1, COLS - 1, 'X');
        refresh();
}
static void
finish(int sig)
{
        endwin();
        exit(sig != 0 ? EXIT_FAILURE : EXIT_SUCCESS);
}
static void
adjust(int sig)
{
        if (waiting || sig == 0) {
                struct winsize size;

                if (ioctl(fileno(stdout), TIOCGWINSZ, &size) == 0) { 
                        resizeterm(size.ws_row, size.ws_col);
                        wrefresh(curscr);   /* Linux needs this */ 
                        show_all();
                }
                interrupted = 0;
        } else {
                interrupted = 1; 
        }
        signal(SIGWINCH, adjust);    /* some systems need this */ 
}
void
init(void)
{
        initscr();
        cbreak();
        noecho();
        nonl();
        intrflush(stdscr, FALSE);
        keypad(stdscr, TRUE);
}
int
main(int argc, char *argv[])
{
        int c;

        signal(SIGINT, finish);
        signal(SIGWINCH, adjust);
        init();
        show_all();

        for (;;) {
                if (interrupted) {
                        adjust(0);
                }
                waiting = 1;
                c = getch();
                waiting = 0;

                if (c == 'q') {
                        finish(EXIT_SUCCESS);
                }
        }
        return EXIT_FAILURE;
}