curs_getch(3X) MISCELLANEOUS LIBRARY FUNCTIONS curs_getch(3X)
NAME
cursgetch: getch, wgetch, mvgetch, mvwgetch, ungetch - get
(or push back) characters from curses terminal keyboard
SYNOPSIS
#include <curses.h>
int getch(void);
int wgetch(WINDOW *win);
int mvgetch(int y, int x);
int mvwgetch(WINDOW *win, int y, int x);
int ungetch(int ch);
DESCRIPTION
With the getch, wgetch, mvgetch and mvwgetch, routines a
character is read from the terminal associated with the win-
dow. In no-delay mode, if no input is waiting, the value
ERR is returned. In delay mode, the program waits until the
system passes text through to the program. Depending on the
setting of cbreak, this is after one character (cbreak
mode), or after the first newline (nocbreak mode). In
half-delay mode, the program waits until a character is
typed or the specified timeout has been reached. Unless
noecho has been set, the character will also be echoed into
the designated window. If the window is not a pad, and it
has been moved or modified since the last call to wrefresh,
wrefresh will be called before another character is read.
If keypad is TRUE, and a function key is pressed, the token
for that function key is returned instead of the raw charac-
ters. Possible function keys are defined in <curses.h> with
integers beginning with 0401, whose names begin with KEY.
If a character that could be the beginning of a function key
(such as escape) is received, curses sets a timer. If the
remainder of the sequence does not come in within the desig-
nated time, the character is passed through; otherwise, the
function key value is returned. For this reason, many ter-
minals experience a delay between the time a user presses
the escape key and the escape is returned to the program.
Since tokens returned by these routines are outside the
ASCII range, they are not printable. The ungetch routine
places ch back onto the input queue to be returned by the
next call to wgetch.
Function Keys
The following function keys, defined in <curses.h>, might be
returned by getch if keypad has been enabled. Note that not
all of these may be supported on a particular terminal if
the terminal does not transmit a unique code when the key is
pressed or if the definition for the key is not present in
the terminfo database.
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curs_getch(3X) MISCELLANEOUS LIBRARY FUNCTIONS curs_getch(3X)
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() MISC. REFERENCE MANUAL PAGES ()
KEY_BREAK Break key
KEY_DOWN The four arrow keys ...
KEY_UP
KEY_LEFT
KEY_RIGHT
KEY_HOME Home key (upward+left arrow)
KEY_BACKSPACE Backspace
KEY_F0 Function keys; space for 64 keys is reserved.
KEY_F(n) For 0 < n < 63
KEY_DL Delete line
KEY_IL Insert line
KEY_DC Delete character
KEY_IC Insert char or enter insert mode
KEY_EIC Exit insert char mode
KEY_CLEAR Clear screen
KEY_EOS Clear to end of screen
KEY_EOL Clear to end of line
KEY_SF Scroll 1 line forward
KEY_SR Scroll 1 line backward (reverse)
KEY_NPAGE Next page
KEY_PPAGE Previous page
KEY_STAB Set tab
KEY_CTAB Clear tab
KEY_CATAB Clear all tabs
KEY_ENTER Enter or send
KEY_SRESET Soft (partial) reset
KEY_RESET Reset or hard reset
KEY_PRINT Print or copy
KEY_LL Home down or bottom (lower left). Keypad is
arranged like this:
A1 up A3
left B2 right
C1 down C3
KEY_A1 Upper left of keypad
KEY_A3 Upper right of keypad
KEY_B2 Center of keypad
KEY_C1 Lower left of keypad
KEY_C3 Lower right of keypad
KEY_BTAB Back tab key
KEY_BEG Beg(inning) key
KEY_CANCEL Cancel key
KEY_CLOSE Close key
KEY_COMMAND Cmd (command) key
KEY_COPY Copy key
KEY_CREATE Create key
KEY_END End key
KEY_EXIT Exit key
KEY_FIND Find key
KEY_HELP Help key
KEY_MARK Mark key
KEY_MESSAGE Message key
KEY_MOVE Move key
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() MISC. REFERENCE MANUAL PAGES ()
KEY_NEXT Next object key
KEY_OPEN Open key
KEY_OPTIONS Options key
KEY_PREVIOUS Previous object key
KEY_REDO Redo key
KEY_REFERENCE Ref(erence) key
KEY_REFRESH Refresh key
KEY_REPLACE Replace key
KEY_RESTART Restart key
KEY_RESUME Resume key
KEY_SAVE Save key
KEY_SBEG Shifted beginning key
KEY_SCANCEL Shifted cancel key
KEY_SCOMMAND Shifted command key
KEY_SCOPY Shifted copy key
KEY_SCREATE Shifted create key
KEY_SDC Shifted delete char key
KEY_SDL Shifted delete line key
KEY_SELECT Select key
KEY_SEND Shifted end key
KEY_SEOL Shifted clear line key
KEY_SEXIT Shifted exit key
KEY_SFIND Shifted find key
KEY_SHELP Shifted help key
KEY_SHOME Shifted home key
KEY_SIC Shifted input key
KEY_SLEFT Shifted left arrow key
KEY_SMESSAGE Shifted message key
KEY_SMOVE Shifted move key
KEY_SNEXT Shifted next key
KEY_SOPTIONS Shifted options key
KEY_SPREVIOUS Shifted prev key
KEY_SPRINT Shifted print key
KEY_SREDO Shifted redo key
KEY_SREPLACE Shifted replace key
KEY_SRIGHT Shifted right arrow
KEY_SRSUME Shifted resume key
KEY_SSAVE Shifted save key
KEY_SSUSPEND Shifted suspend key
KEY_SUNDO Shifted undo key
KEY_SUSPEND Suspend key
KEY_UNDO Undo key
RETURN VALUE
All routines return the integer ERR upon failure and an
integer value other than ERR upon successful completion.
NOTES
The header file <curses.h> automatically includes the header
files <stdio.h> and <unctrl.h>.
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() MISC. REFERENCE MANUAL PAGES ()
Use of the escape key by a programmer for a single character
function is discouraged. 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.
SEE ALSO
curses(3X), cursinopts(3X), cursmove(3X),
cursrefresh(3X).
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