получить (или вернуть) символы с клавиатуры терминала curses (get (or push back) characters from curses terminal keyboard)
Примечание (Note)
Use of the escape key by a programmer for a single character
function is discouraged, as it will cause a delay of up to one
second while the keypad code looks for a following function-key
sequence.
Some keys may be the same as commonly used control keys, e.g.,
KEY_ENTER versus control/M, KEY_BACKSPACE versus control/H. Some
curses implementations may differ according to whether they treat
these control keys specially (and ignore the terminfo), or use
the terminfo definitions. Ncurses uses the terminfo definition.
If it says that KEY_ENTER is control/M, getch will return
KEY_ENTER when you press control/M.
Generally, KEY_ENTER denotes the character(s) sent by the Enter
key on the numeric keypad:
• the terminal description lists the most useful keys,
• the Enter key on the regular keyboard is already handled by
the standard ASCII characters for carriage-return and line-
feed,
• depending on whether nl or nonl was called, pressing 'Enter'
on the regular keyboard may return either a carriage-return
or line-feed, and finally
• 'Enter or send' is the standard description for this key.
When using getch, wgetch, mvgetch, or mvwgetch, nocbreak mode
(nocbreak) and echo mode (echo) should not be used at the same
time. Depending on the state of the tty driver when each
character is typed, the program may produce undesirable results.
Note that getch, mvgetch, and mvwgetch may be macros.
Historically, the set of keypad macros was largely defined by the
extremely function-key-rich keyboard of the AT&T 7300, aka 3B1,
aka Safari 4. Modern personal computers usually have only a
small subset of these. IBM PC-style consoles typically support
little more than KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_HOME,
KEY_END, KEY_NPAGE, KEY_PPAGE, and function keys 1 through 12.
The Ins key is usually mapped to KEY_IC.
