contrib/ncurses-5.4/test/ditto.c

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  28
  29 /*
  30  * Author: Thomas E. Dickey <dickey@clark.net> 1998
  31  *
  32  * $Id: ditto.c,v 1.4 2001/09/15 21:53:37 tom Exp $
  33  *
  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.,
  37  *      ditto /dev/ttyp1
  38  */
  39 #include <test.priv.h>
  40 #include <sys/stat.h>
  41 #include <errno.h>
  42
  43 typedef struct {
  44     FILE *input;
  45     FILE *output;
  46     SCREEN *screen;
  47 } DITTO;
  48
  49 static void
  50 failed(const char *s)
  51 {
  52     perror(s);
  53     ExitProgram(EXIT_FAILURE);
  54 }
  55
  56 static void
  57 usage(void)
  58 {
  59     fprintf(stderr, "usage: ditto [terminal1 ...]\n");
  60     ExitProgram(EXIT_FAILURE);
  61 }
  62
  63 static FILE *
  64 open_tty(char *path)
  65 {
  66     FILE *fp;
  67     struct stat sb;
  68
  69     if (stat(path, &sb) < 0)
  70         failed(path);
  71     if ((sb.st_mode & S_IFMT) != S_IFCHR) {
  72         errno = ENOTTY;
  73         failed(path);
  74     }
  75     fp = fopen(path, "a+");
  76     if (fp == 0)
  77         failed(path);
  78     printf("opened %s\n", path);
  79     return fp;
  80 }
  81
  82 int
  83 main(
  84         int argc GCC_UNUSED,
  85         char *argv[]GCC_UNUSED)
  86 {
  87     int j;
  88     int active_tty = 0;
  89     DITTO *data;
  90
  91     if (argc <= 1)
  92         usage();
  93
  94     if ((data = (DITTO *) calloc(argc, sizeof(DITTO))) == 0)
  95         failed("calloc data");
  96
  97     data[0].input = stdin;
  98     data[0].output = stdout;
  99     for (j = 1; j < argc; j++) {
 100         data[j].input =
 101             data[j].output = open_tty(argv[j]);
 102     }
 103
 104     /*
 105      * If we got this far, we have open connection(s) to the terminal(s).
 106      * Set up the screens.
 107      */
 108     for (j = 0; j < argc; j++) {
 109         active_tty++;
 110         data[j].screen = newterm(
 111                                     (char *) 0,         /* assume $TERM is the same */
 112                                     data[j].output,
 113                                     data[j].input);
 114         if (data[j].screen == 0)
 115             failed("newterm");
 116         cbreak();
 117         noecho();
 118         scrollok(stdscr, TRUE);
 119     }
 120
 121     /*
 122      * Loop, reading characters from any of the inputs and writing to all
 123      * of the screens.
 124      */
 125     for (;;) {
 126         int ch;
 127         set_term(data[0].screen);
 128         ch = getch();
 129         if (ch == ERR)
 130             continue;
 131         if (ch == 4)
 132             break;
 133         for (j = 0; j < argc; j++) {
 134             set_term(data[j].screen);
 135             addch(ch);
 136             refresh();
 137         }
 138     }
 139
 140     /*
 141      * Cleanup and exit
 142      */
 143     for (j = argc - 1; j >= 0; j--) {
 144         set_term(data[j].screen);
 145         endwin();
 146     }
 147     ExitProgram(EXIT_SUCCESS);
 148 }