/****************************************************************************
- * Copyright 2018-2020,2021 Thomas E. Dickey *
+ * Copyright 2018-2021,2022 Thomas E. Dickey *
* Copyright 1998-2016,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
/*
* Author: Thomas E. Dickey (1998-on)
*
- * $Id: ditto.c,v 1.52 2021/08/15 20:07:11 tom Exp $
+ * $Id: ditto.c,v 1.55 2022/12/04 00:40:55 tom Exp $
*
* The program illustrates how to set up multiple screens from a single
* program.
DITTO *ditto; /* data for all screens */
} DDATA;
-static GCC_NORETURN void failed(const char *);
-static GCC_NORETURN void usage(void);
-
static void
failed(const char *s)
{
ExitProgram(EXIT_FAILURE);
}
-static void
-usage(void)
-{
- fprintf(stderr, "Usage: ditto [terminal1 ...]\n");
- ExitProgram(EXIT_FAILURE);
-}
-
/* Add to the head of the fifo, checking for overflow. */
static void
put_fifo(FIFO * fifo, int value)
}
#endif
-int
-main(int argc, char *argv[])
+static void
+usage(int ok)
{
- int j;
- DITTO *data;
+ static const char *msg[] =
+ {
+ "Usage: ditto [terminal [terminal2 ...]]"
+ ,""
+ ,USAGE_COMMON
+ };
+ size_t n;
+
+ for (n = 0; n < SIZEOF(msg); n++)
+ fprintf(stderr, "%s\n", msg[n]);
+
+ ExitProgram(ok ? EXIT_SUCCESS : EXIT_FAILURE);
+/* *INDENT-OFF* */}
+VERSION_COMMON()
+/* *INDENT-ON* */
+
+ int
+ main(int argc, char *argv[]) {
+ int j;
+ int ch;
+ DITTO *data;
#ifndef USE_PTHREADS
- int count;
+ int count;
#endif
- if (argc <= 1)
- usage();
+ while ((ch = getopt(argc, argv, OPTS_COMMON)) != -1) {
+ switch (ch) {
+ case OPTS_VERSION:
+ show_version(argv);
+ ExitProgram(EXIT_SUCCESS);
+ default:
+ usage(ch == OPTS_USAGE);
+ /* NOTREACHED */
+ }
+ } if (optind < argc)
+ usage(FALSE);
- if ((data = typeCalloc(DITTO, (size_t) argc)) == 0)
- failed("calloc data");
+ if ((data = typeCalloc(DITTO, (size_t) argc)) == 0)
+ failed("calloc data");
- assert(data != 0);
+ assert(data != 0);
- for (j = 0; j < argc; j++) {
- open_screen(&data[j], argv, argc, j);
- }
+ for (j = 0; j < argc; j++) {
+ open_screen(&data[j], argv, argc, j);
+ }
#ifdef USE_PTHREADS
- /*
- * For multi-threaded operation, set up a reader for each of the screens.
- * That uses blocking I/O rather than polling for input, so no calls to
- * napms() are needed.
- */
- for (j = 0; j < argc; j++) {
- (void) pthread_create(&(data[j].thread), NULL, handle_screen, &data[j]);
- }
- pthread_join(data[1].thread, NULL);
+ /*
+ * For multi-threaded operation, set up a reader for each of the screens.
+ * That uses blocking I/O rather than polling for input, so no calls to
+ * napms() are needed.
+ */
+ for (j = 0; j < argc; j++) {
+ (void) pthread_create(&(data[j].thread), NULL, handle_screen,
+ &data[j]);
+ }
+ pthread_join(data[1].thread, NULL);
#else
- /*
- * Loop, reading characters from any of the inputs and writing to all
- * of the screens.
- */
- for (count = 0;; ++count) {
- DDATA ddata;
- int ch;
- int which = (count % argc);
+ /*
+ * Loop, reading characters from any of the inputs and writing to all
+ * of the screens.
+ */
+ for (count = 0;; ++count) {
+ DDATA ddata;
+ int which = (count % argc);
- napms(20);
+ napms(20);
- ddata.source = which;
- ddata.ditto = data;
+ ddata.source = which;
+ ddata.ditto = data;
- ch = USING_SCREEN(data[which].screen, read_screen, &ddata);
- if (ch == CTRL('D')) {
- break;
- } else if (ch != ERR) {
- show_ditto(data, argc, &ddata);
+ ch = USING_SCREEN(data[which].screen, read_screen, &ddata);
+ if (ch == CTRL('D')) {
+ break;
+ } else if (ch != ERR) {
+ show_ditto(data, argc, &ddata);
+ }
}
- }
#endif
- /*
- * Cleanup and exit
- */
- for (j = argc - 1; j >= 0; j--) {
- USING_SCREEN(data[j].screen, close_screen, 0);
- fprintf(data[j].output, "**Closed\r\n");
-
/*
- * Closing before a delscreen() helps ncurses determine that there
- * is no valid output buffer, and can remove the setbuf() data.
+ * Cleanup and exit
*/
- fflush(data[j].output);
- fclose(data[j].output);
- delscreen(data[j].screen);
+ for (j = argc - 1; j >= 0; j--) {
+ USING_SCREEN(data[j].screen, close_screen, 0);
+ fprintf(data[j].output, "**Closed\r\n");
+
+ /*
+ * Closing before a delscreen() helps ncurses determine that there
+ * is no valid output buffer, and can remove the setbuf() data.
+ */
+ fflush(data[j].output);
+ fclose(data[j].output);
+ delscreen(data[j].screen);
+ }
+ ExitProgram(EXIT_SUCCESS);
}
- ExitProgram(EXIT_SUCCESS);
-}
#else
int
main(void)