Re: getting input not working

[Peter Jay Salzman]

ok, after thinking about it, i realized the answer to my question is
"yes, stdin is redirected away from the keyboard and to a file".

that's why getch() is failing.  it's reading from the wrong stream.

if i'm on the right track, is there a way to reconnect stdin to the
keyboard?

pete


begin Peter Jay Salzman <address@hidden> 
> hi there,
> 
> this is ncurses on debian testing.
> 
> my program takes words from stdin and orders them into a binary tree.
> very similar to "self referential structures" from kernighan/ritchie's
> "the C programming language" (pg 139).  like:
> 
> a.out < file_of_words
> 
> after the words are ordered into a binary tree, i'm using ncurses to
> print the tree.
> 
> here's (very) pared down ncurses code:
> 
> 
> 
> void ncurses_print_tree(struct node *node_ptr)
> {
>    WINDOW *win;
>    int c = 65;
> 
>    initscr();
> 
>    win = newwin(0, 0, 0, 0);
> 
>    while ( 1 )
>    {
>       c = wgetch(win);
>       wrefresh(win);
>       mvwprintw(win, 0, 0, "%c", c);
>    }
> 
>    delwin(win);
>    endwin();
> }
> 
> 
> i expect my keystrokes to be displayed in the upper left corner of the
> xterm.  instead, all that's being displayed is "-1".  this is "ERR", as
> defined in ncurses.h.
> 
> i check win for NULL, and i'm able to mvwprintw() stuff to the screen.
> it looks like the program isn't "waiting" to collect my input.
> 
> i'm wondering if i've somehow "ruined" stdin by collecting input on
> stdin.  i've tried using fflush(stdin) to make sure there's nothing
> there, but still no success.
> 
> when i debug the program, gdb steps over getch() as if it weren't there.
> 
> any idea why collecting input may be failing?
> 
> pete
> 
> -- 
> First they ignore you, then they laugh at you, then they fight you,
> then you win. -- Gandhi, being prophetic about Linux.
> 
> Fingerprint: B9F1 6CF3 47C4 7CD8 D33E 70A9 A3B9 1945 67EA 951D
> 
> 
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-- 
First they ignore you, then they laugh at you, then they fight you,
then you win. -- Gandhi, being prophetic about Linux.

Fingerprint: B9F1 6CF3 47C4 7CD8 D33E 70A9 A3B9 1945 67EA 951D