Re: lib/23910 (libcurses: bug in redraw()?)

[Valery Ushakov <uwe%stderr.spb.ru@localhost>]

The following reply was made to PR lib/23910; it has been noted by GNATS.

From: Valery Ushakov <uwe%stderr.spb.ru@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: lib/23910 (libcurses: bug in redraw()?)
Date: Sun, 11 Nov 2018 03:07:25 +0300

 I was wrong.  The following program should demonstrate the bug.  My
 curses is rusty, so I might be missing something, so please double
 check, but I get the expected result with ncurses.
 
 With ncurses I get the screen filled with background color and the
 left border painted white-on-red, with A and Z at the top and at the
 bottom.
 
 With our curses the A and Z are correct, but the rest of the left
 border is not painted.
 
 #include <curses.h>
 #include <err.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 
 int
 main()
 {
     const char *errmsg = NULL;
     int err;
 
 #define CHECKERR(_msg)                          \
     do {                                        \
         if (err != OK) {                        \
             errmsg = _msg " failed";            \
             goto out;                           \
         }                                       \
     } while (0)
 
 
     WINDOW *scrw = initscr();
     if (scrw == NULL)
         errx(EXIT_FAILURE, "initscr failed\n");
 
     if (!has_colors()) {
         errmsg = "no colors";
         goto out;
     }
 
     err = start_color();
     CHECKERR("start_color");
 
     err = init_pair(2, COLOR_WHITE, COLOR_RED);
     CHECKERR("init_pair");
 
     int maxy, maxx;
     getmaxyx(stdscr, maxy, maxx);
 
     WINDOW *lborder = newwin(maxy - 1, 1, 0, 0);
     if (lborder == NULL) {
         errmsg = "newwin failed";
         goto out;
     }
 
     wbkgdset(lborder, COLOR_PAIR(2));
 
     werase(lborder);
 
     mvwaddstr(lborder, 0, 0, "A");
     mvwaddstr(lborder, maxy - 2, 0, "Z");
 
     wnoutrefresh(stdscr);
     wnoutrefresh(lborder);
     doupdate();
 
     sleep(5);
 out:
     endwin();
 
     if (err != OK) {
         if (errmsg == NULL)
             errmsg = "unknown error";
         fprintf(stderr, "%s\n", errmsg);
         return EXIT_FAILURE;
     }
  
     return EXIT_SUCCESS;
 }
 
 
 -uwe