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30 * Author: Thomas E. Dickey <dickey@clark.net> 1998
32 * $Id: ditto.c,v 1.21 2008/04/19 20:08:45 tom Exp $
34 * The program illustrates how to set up multiple screens from a single
35 * program. Invoke the program by specifying another terminal on the same
36 * machine by specifying its device, e.g.,
39 #include <test.priv.h>
44 #include USE_OPENPTY_HEADER
55 int value; /* the actual data */
56 int source; /* which screen did data come from */
57 int target; /* which screen is data going to */
65 ExitProgram(EXIT_FAILURE);
71 fprintf(stderr, "usage: ditto [terminal1 ...]\n");
72 ExitProgram(EXIT_FAILURE);
82 char slave_name[1024];
86 if (openpty(&amaster, &aslave, slave_name, 0, 0) != 0)
88 if ((leaf = strrchr(slave_name, '/')) == 0) {
92 sprintf(s_option, "-S%s/%d", slave_name, aslave);
94 execlp("xterm", "xterm", s_option, "-title", path, (char *) 0);
97 fp = fdopen(amaster, "r+");
101 if (stat(path, &sb) < 0)
103 if ((sb.st_mode & S_IFMT) != S_IFCHR) {
107 fp = fopen(path, "r+");
110 printf("opened %s\n", path);
116 close_screen(SCREEN *sp GCC_UNUSED, void *arg GCC_UNUSED)
124 read_screen(SCREEN *sp GCC_UNUSED, void *arg)
126 DDATA *data = (DDATA *) arg;
127 WINDOW *win = data->ditto[data->source].windows[data->source];
133 write_screen(SCREEN *sp GCC_UNUSED, void *arg GCC_UNUSED)
135 DDATA *data = (DDATA *) arg;
136 WINDOW *win = data->ditto[data->target].windows[data->source];
138 waddch(win, data->value);
145 show_ditto(DITTO * data, int count, DDATA * ddata)
149 for (n = 0; n < count; n++) {
151 USING_SCREEN(data[n].screen, write_screen, (void *) ddata);
156 main(int argc GCC_UNUSED,
157 char *argv[]GCC_UNUSED)
166 if ((data = typeCalloc(DITTO, argc)) == 0)
167 failed("calloc data");
169 data[0].input = stdin;
170 data[0].output = stdout;
171 for (j = 1; j < argc; j++) {
173 data[j].output = open_tty(argv[j]);
177 * If we got this far, we have open connection(s) to the terminal(s).
178 * Set up the screens.
180 for (j = 0; j < argc; j++) {
183 data[j].screen = newterm((char *) 0, /* assume $TERM is the same */
187 if (data[j].screen == 0)
191 scrollok(stdscr, TRUE);
192 nodelay(stdscr, TRUE);
195 data[j].windows = typeCalloc(WINDOW *, argc);
197 high = (LINES - 2) / argc;
199 for (k = 0; k < argc; ++k) {
200 WINDOW *outer = newwin(high, wide, 1 + (high * k), 1);
201 WINDOW *inner = derwin(outer, high - 2, wide - 2, 1, 1);
204 mvwaddstr(outer, 0, 2, argv[k]);
207 scrollok(inner, TRUE);
208 nodelay(inner, TRUE);
210 data[j].windows[k] = inner;
216 * Loop, reading characters from any of the inputs and writing to all
219 for (count = 0;; ++count) {
222 int which = (count % argc);
226 ddata.source = which;
229 ch = USING_SCREEN(data[which].screen, read_screen, &ddata);
237 show_ditto(data, argc, &ddata);
243 for (j = argc - 1; j >= 0; j--) {
244 USING_SCREEN(data[j].screen, close_screen, 0);
245 fprintf(data[j].output, "**Closed\r\n");
248 * Closing before a delscreen() helps ncurses determine that there
249 * is no valid output buffer, and can remove the setbuf() data.
251 fflush(data[j].output);
252 fclose(data[j].output);
253 delscreen(data[j].screen);
255 ExitProgram(EXIT_SUCCESS);