source: trunk/ncurses/test/ditto.c@ 2787

/****************************************************************************
 * Copyright (c) 1998-2001,2005 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/*
 * 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);
}