Errno 25 on first book example

[createyourpersonalaccount]

The issue

Using pipes

I've tried to compile the source as-is from the book on the blue house example (the first example). I've invoked it with:

$ printf "hello house\n" | ./direct_mode

but I get no output. On secondary inspection I figured out that after the first getchar() call, errno is set to 25, which seems to be:

#define ENOTTY          25      /* Not a typewriter */

Using input redirection

With redirection, e.g.

$ ./direct_mode <(printf "hello house\n")

I get again nothing; same if I use < msg where msg is a file containing the message. Somewhat amusingly however, if I redirect the Makefile into it, I get garbage:

$ ./direct_mode < Makefile | head
1
2
A3
M3
_3
C3
P3
P3
F3
L3

also

$ ./direct_mode < Makefile | tail
ferror: Inappropriate ioctl for device
P3
O3
R3
T3
:3

3
errno = 25
4

LANG|LC_CTYPE|TERM

I've tested on the following:

declare -x COLORTERM="truecolor"
declare -x GDM_LANG="en_US.UTF-8"
declare -x LANG="en_US.UTF-8"
declare -x LANGUAGE="en_US:en"
declare -x TERM="tmux-256color"
declare -x TERMINFO="/usr/lib/kitty/terminfo"
declare -x TERM_PROGRAM="tmux"
declare -x TERM_PROGRAM_VERSION="3.3a"

and

declare -x COLORTERM="truecolor"
declare -x GDM_LANG="en_US.UTF-8"
declare -x GNOME_TERMINAL_SCREEN="/org/gnome/Terminal/screen/494ed266_2453_41a2_a7a9_57b6f3508b86"
declare -x GNOME_TERMINAL_SERVICE=":1.194"
declare -x LANG="en_US.UTF-8"
declare -x LANGUAGE="en_US:en"
declare -x TERM="xterm-256color"

notcurses version

ncurses 3.0.13 installed from source

terminal name and version

I used both kitty 0.26.5 and GNOME Terminal 3.46.8 using VTE 0.70.6 +BIDI +GNUTLS +ICU +SYSTEMD, from apt in Debian 12.

Compilation flags for example program

I used -L/usr/local/lib -lnotcurses -lnotcurses-core.