/****************************************************************************
- * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. *
+ * Copyright 2018-2022,2023 Thomas E. Dickey *
+ * Copyright 1998-2016,2017 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 *
/*
* Author: Thomas E. Dickey (1998-on)
*
- * $Id: ditto.c,v 1.26 2008/04/26 23:42:39 tom Exp $
+ * $Id: ditto.c,v 1.59 2023/09/23 17:08:43 tom Exp $
*
* The program illustrates how to set up multiple screens from a single
* program.
*/
#include <test.priv.h>
#include <sys/stat.h>
-#include <errno.h>
+
+#if HAVE_DELSCREEN
+
+#ifdef USE_PTHREADS
+#include <pthread.h>
+#endif
#ifdef USE_XTERM_PTY
#include USE_OPENPTY_HEADER
FILE *input;
FILE *output;
SCREEN *screen; /* this screen - curses internal data */
+ int which1; /* this screen's index in DITTO[] array */
int length; /* length of windows[] and peeks[] */
char **titles; /* per-window titles */
+ WINDOW **parents; /* display boxes around each screen's data */
WINDOW **windows; /* display data from each screen */
PEEK *peeks; /* indices for each screen's fifo */
FIFO fifo; /* fifo for this screen */
+#ifdef USE_PTHREADS
+ pthread_t thread;
+#endif
} DITTO;
+#ifdef USE_PTHREADS
+#define LockIt() pthread_mutex_lock(&pending_mutex)
+#define UnlockIt() pthread_mutex_unlock(&pending_mutex)
+pthread_mutex_t pending_mutex;
+#else
+#define LockIt() /* nothing */
+#define UnlockIt() /* nothing */
+#endif
+
/*
* Structure used to pass multiple parameters via the use_screen()
* single-parameter interface.
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)
{
int result = -1;
if (peek->sequence < fifo->sequence) {
- peek->sequence += 1;
result = fifo->data[THIS_FIFO(peek->sequence)];
+ peek->sequence += 1;
}
return result;
}
int amaster;
int aslave;
char slave_name[1024];
- char s_option[1024];
- char *leaf;
+ char s_option[sizeof(slave_name) + 80];
+ const char *xterm_prog = 0;
- if (openpty(&amaster, &aslave, slave_name, 0, 0) != 0)
+ if ((xterm_prog = getenv("XTERM_PROG")) == 0)
+ xterm_prog = "xterm";
+
+ if (openpty(&amaster, &aslave, slave_name, 0, 0) != 0
+ || strlen(slave_name) > sizeof(slave_name) - 1)
failed("openpty");
- if ((leaf = strrchr(slave_name, '/')) == 0) {
+ if (strrchr(slave_name, '/') == 0) {
errno = EISDIR;
failed(slave_name);
}
- sprintf(s_option, "-S%s/%d", slave_name, aslave);
+ _nc_SPRINTF(s_option, _nc_SLIMIT(sizeof(s_option))
+ "-S%s/%d", slave_name, aslave);
if (fork()) {
- execlp("xterm", "xterm", s_option, "-title", path, (char *) 0);
+ execlp(xterm_prog, xterm_prog, s_option, "-title", path, (char *) 0);
_exit(0);
}
fp = fdopen(amaster, "r+");
+ if (fp == 0)
+ failed(path);
#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;
failed(path);
printf("opened %s\n", path);
#endif
+ assert(fp != 0);
return fp;
}
-static void
-init_screen(SCREEN *sp GCC_UNUSED, void *arg)
+static int
+init_screen(
+#if HAVE_USE_WINDOW
+ SCREEN *sp GCC_UNUSED,
+#endif
+ void *arg)
{
DITTO *target = (DITTO *) arg;
int high, wide;
cbreak();
noecho();
scrollok(stdscr, TRUE);
- nodelay(stdscr, TRUE);
box(stdscr, 0, 0);
- target->windows = typeCalloc(WINDOW *, target->length);
- target->peeks = typeCalloc(PEEK, target->length);
+ target->parents = typeCalloc(WINDOW *, (size_t) target->length);
+ target->windows = typeCalloc(WINDOW *, (size_t) target->length);
+ target->peeks = typeCalloc(PEEK, (size_t) target->length);
high = (LINES - 2) / target->length;
wide = (COLS - 2);
WINDOW *inner = derwin(outer, high - 2, wide - 2, 1, 1);
box(outer, 0, 0);
- mvwaddstr(outer, 0, 2, target->titles[k]);
+ MvWAddStr(outer, 0, 2, target->titles[k]);
wnoutrefresh(outer);
scrollok(inner, TRUE);
- nodelay(inner, TRUE);
keypad(inner, TRUE);
+#ifndef USE_PTHREADS
+ nodelay(inner, TRUE);
+#endif
+ target->parents[k] = outer;
target->windows[k] = inner;
}
doupdate();
+ return TRUE;
+}
+
+static void
+free_screen(DITTO * target)
+{
+ free(target->parents);
+ free(target->windows);
+ free(target->peeks);
}
static void
-open_screen(DITTO * target, char **source, int length, int which)
+open_screen(DITTO * target, char **source, int length, int which1)
{
- if (which != 0) {
+ if (which1 != 0) {
target->input =
- target->output = open_tty(source[which]);
+ target->output = open_tty(source[which1]);
} else {
target->input = stdin;
target->output = stdout;
}
+ target->which1 = which1;
target->titles = source;
target->length = length;
+ target->fifo.head = -1;
target->screen = newterm((char *) 0, /* assume $TERM is the same */
target->output,
target->input);
}
static int
-close_screen(SCREEN *sp GCC_UNUSED, void *arg GCC_UNUSED)
+close_screen(
+#if HAVE_USE_WINDOW
+ SCREEN *sp GCC_UNUSED,
+#endif
+ void *arg GCC_UNUSED)
{
+#if HAVE_USE_WINDOW
(void) sp;
+#endif
(void) arg;
return endwin();
}
* Read data from the 'source' screen.
*/
static int
-read_screen(SCREEN *sp GCC_UNUSED, void *arg)
+read_screen(
+#if HAVE_USE_WINDOW
+ SCREEN *sp GCC_UNUSED,
+#endif
+ void *arg)
{
DDATA *data = (DDATA *) arg;
DITTO *ditto = &(data->ditto[data->source]);
* Write all of the data that's in fifos for the 'target' screen.
*/
static int
-write_screen(SCREEN *sp GCC_UNUSED, void *arg GCC_UNUSED)
+write_screen(
+#if HAVE_USE_WINDOW
+ SCREEN *sp GCC_UNUSED,
+#endif
+ void *arg GCC_UNUSED)
{
DDATA *data = (DDATA *) arg;
DITTO *ditto = &(data->ditto[data->target]);
while ((ch = peek_fifo(fifo, peek)) > 0) {
changed = TRUE;
- waddch(win, ch);
+ waddch(win, (chtype) ch);
wnoutrefresh(win);
}
}
{
int n;
+ (void) data;
for (n = 0; n < count; n++) {
ddata->target = n;
USING_SCREEN(data[n].screen, write_screen, (void *) ddata);
}
}
+#ifdef USE_PTHREADS
+static void *
+handle_screen(void *arg)
+{
+ DDATA ddata;
+
+ memset(&ddata, 0, sizeof(ddata));
+ ddata.ditto = (DITTO *) arg;
+ ddata.source = ddata.ditto->which1;
+ ddata.ditto -= ddata.source; /* -> base of array */
+
+ for (;;) {
+ int ch = read_screen(ddata.ditto->screen, &ddata);
+ if (ch == CTRL('D')) {
+ int later = (ddata.source ? ddata.source : -1);
+ int j;
+
+ for (j = ddata.ditto->length - 1; j > 0; --j) {
+ if (j != later) {
+ pthread_cancel(ddata.ditto[j].thread);
+ }
+ }
+ if (later > 0) {
+ pthread_cancel(ddata.ditto[later].thread);
+ }
+ break;
+ }
+ show_ditto(ddata.ditto, ddata.ditto->length, &ddata);
+ }
+ return NULL;
+}
+#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 GCC_UNUSED,
- char *argv[]GCC_UNUSED)
+main(int argc, char *argv[])
{
int j;
- int count;
+ 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 ((data = typeCalloc(DITTO, argc)) == 0)
+ if ((data = typeCalloc(DITTO, (size_t) argc)) == 0)
failed("calloc data");
+ assert(data != 0);
+
for (j = 0; j < argc; j++) {
open_screen(&data[j], argv, argc, j);
}
+#ifdef USE_PTHREADS
+ pthread_mutex_init(&pending_mutex, 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);
napms(20);
show_ditto(data, argc, &ddata);
}
}
+#endif
/*
* Cleanup and exit
*/
for (j = argc - 1; j >= 0; j--) {
+ LockIt();
USING_SCREEN(data[j].screen, close_screen, 0);
fprintf(data[j].output, "**Closed\r\n");
fflush(data[j].output);
fclose(data[j].output);
delscreen(data[j].screen);
+ free_screen(&data[j]);
+ UnlockIt();
}
+ free(data);
ExitProgram(EXIT_SUCCESS);
}
+#else
+int
+main(void)
+{
+ printf("This program requires the curses delscreen function\n");
+ ExitProgram(EXIT_FAILURE);
+}
+#endif
projects / ncurses.git / blobdiff