/****************************************************************************
- * 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 1.51 2021/04/17 17:39:43 tom Exp $
+ * $Id: ditto.c,v 1.56 2022/12/10 22:10:49 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)
#else
struct stat sb;
- if (stat(path, &sb) < 0)
+ if (stat(path, &sb) == -1)
failed(path);
if ((sb.st_mode & S_IFMT) != S_IFCHR) {
errno = ENOTTY;
}
#endif
+static void
+usage(int ok)
+{
+ 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;
#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");
* napms() are needed.
*/
for (j = 0; j < argc; j++) {
- (void) pthread_create(&(data[j].thread), NULL, handle_screen, &data[j]);
+ (void) pthread_create(&(data[j].thread), NULL, handle_screen,
+ &data[j]);
}
pthread_join(data[1].thread, NULL);
#else
*/
for (count = 0;; ++count) {
DDATA ddata;
- int ch;
int which = (count % argc);
napms(20);