source: trunk/ncurses/test/ditto.c@ 2788

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/*
 * Author: Thomas E. Dickey <dickey@clark.net> 1998
 *
 * $Id: ditto.c,v 1.5 2005/04/16 16:35:49 tom Exp $
 *
 * The program illustrates how to set up multiple screens from a single
 * program.  Invoke the program by specifying another terminal on the same
 * machine by specifying its device, e.g.,
 *      ditto /dev/ttyp1
 */
#include <test.priv.h>
#include <sys/stat.h>
#include <errno.h>

typedef struct {
    FILE *input;
    FILE *output;
    SCREEN *screen;
} DITTO;

static void
failed(const char *s)
{
    perror(s);
    ExitProgram(EXIT_FAILURE);
}

static void
usage(void)
{
    fprintf(stderr, "usage: ditto [terminal1 ...]\n");
    ExitProgram(EXIT_FAILURE);
}

static FILE *
open_tty(char *path)
{
    FILE *fp;
    struct stat sb;

    if (stat(path, &sb) < 0)
        failed(path);
    if ((sb.st_mode & S_IFMT) != S_IFCHR) {
        errno = ENOTTY;
        failed(path);
    }
    fp = fopen(path, "a+");
    if (fp == 0)
        failed(path);
    printf("opened %s\n", path);
    return fp;
}

int
main(int argc GCC_UNUSED,
     char *argv[]GCC_UNUSED)
{
    int j;
    int active_tty = 0;
    DITTO *data;

    if (argc <= 1)
        usage();

    if ((data = (DITTO *) calloc((unsigned) argc, sizeof(DITTO))) == 0)
        failed("calloc data");

    data[0].input = stdin;
    data[0].output = stdout;
    for (j = 1; j < argc; j++) {
        data[j].input =
            data[j].output = open_tty(argv[j]);
    }

    /*
     * If we got this far, we have open connection(s) to the terminal(s).
     * Set up the screens.
     */
    for (j = 0; j < argc; j++) {
        active_tty++;
        data[j].screen = newterm((char *) 0,    /* assume $TERM is the same */
                                 data[j].output,
                                 data[j].input);
        if (data[j].screen == 0)
            failed("newterm");
        cbreak();
        noecho();
        scrollok(stdscr, TRUE);
    }

    /*
     * Loop, reading characters from any of the inputs and writing to all
     * of the screens.
     */
    for (;;) {
        int ch;
        set_term(data[0].screen);
        ch = getch();
        if (ch == ERR)
            continue;
        if (ch == 4)
            break;
        for (j = 0; j < argc; j++) {
            set_term(data[j].screen);
            addch(UChar(ch));
            refresh();
        }
    }

    /*
     * Cleanup and exit
     */
    for (j = argc - 1; j >= 0; j--) {
        set_term(data[j].screen);
        endwin();
    }
    ExitProgram(EXIT_SUCCESS);
}