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curs_getwch(3curses)
curs_getwch(3CURSES) Curses Library Functions curs_getwch(3CURSES)
NAME
curs_getwch, getwch, wgetwch, mvgetwch, mvwgetwch, ungetwch - get (or
push back) wchar_t characters from curses terminal keyboard
SYNOPSIS
cc [ flag ... ] file ... -lcurses [ library .. ]
#include <curses.h>
int getwch(void);
int wgetwch(WINDOW *win);
int mvgetwch(int y, int x);
int mvwgetwch(WINDOW *win, int y, int x);
int ungetwch(int wch);
DESCRIPTION
The getwch(), wgetwch(), mvgetwch(), and mvwgetwch() routines read an
EUC character from the terminal associated with the window, transform
it into a wchar_t character, and return a wchar_t character. 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 charac‐
ter ( 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(3CURSES), 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 characters. Possible func‐
tion 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(3CURSES) sets a
timer. If the remainder of the sequence does not come in within the
designated time, the character is passed through; otherwise, the func‐
tion key value is returned. For this reason, many terminals experience
a delay between the time a user presses the escape key and the escape
is returned to the program.
The ungetwch() routine places wch back onto the input queue to be
returned by the next call to wgetwch().
Function Keys
The following function keys, defined in <curses.h>, might be returned
by getwch() 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(5) database.
tab() box; lw(2.75i) lw(2.75i) lw(2.75i) lw(2.75i) NameKey name _
KEY_BREAKBreak key KEY_DOWNThe four arrow keys ... KEY_UP KEY_LEFT
KEY_RIGHT KEY_HOMEHome key (upward+left arrow) KEY_BACKSPACEBackspace
KEY_F0T{ Function keys; space for 64 keys is reserved. T} KEY_F(n)For
0 ≤ n ≤ 63 KEY_DLDelete line KEY_ILInsert line KEY_DCDelete character
KEY_ICInsert char or enter insert mode KEY_EICExit insert char mode
KEY_CLEARClear screen KEY_EOSClear to end of screen KEY_EOLClear to end
of line KEY_SFScroll 1 line forward
KEY_SRScroll 1 line backward (reverse) KEY_NPAGENext page
KEY_PPAGEPrevious page KEY_STABSet tab KEY_CTABClear tab KEY_CATABClear
all tabs KEY_ENTEREnter or send KEY_SRESETSoft (partial) reset
KEY_RESETReset or hard reset KEY_PRINTPrint or copy KEY_LLT{ Home down
or bottom (lower left). Keypad is arranged like this: A1 up A3 left B2
right C1 down C3 T} KEY_A1Upper left of keypad KEY_A3Upper right of
keypad KEY_B2Center of keypad KEY_C1Lower left of keypad KEY_C3Lower
right of keypad KEY_BTABBack tab key KEY_BEGBeg(inning) key KEY_CANCEL‐
Cancel key KEY_CLOSEClose key KEY_COMMANDCmd (command) key KEY_COPYCopy
key KEY_CREATECreate key KEY_ENDEnd key KEY_EXITExit key KEY_FINDFind
key KEY_HELPHelp key KEY_MARKMark key KEY_MESSAGEMessage key KEY_MOVE‐
Move key KEY_NEXTNext object key KEY_OPENOpen key KEY_OPTIONSOptions
key KEY_PREVIOUSPrevious object key KEY_REDORedo key KEY_REFERENCERef‐
erence key KEY_REFRESH Refresh key KEY_REPLACEReplace key
KEY_RESTARTRestart key KEY_RESUMEResume key KEY_SAVESave key
KEY_SBEGShifted beginning key KEY_SCANCELShifted cancel key KEY_SCOM‐
MANDShifted command key KEY_SCOPYShifted copy key KEY_SCREATEShifted
create key KEY_SDCShifted delete char key KEY_SDLShifted delete line
key KEY_SELECTSelect key KEY_SENDShifted end key KEY_SEOLShifted clear
line key KEY_SEXITShifted exit key KEY_SFINDShifted find key KEY_SHELP‐
Shifted help key KEY_SHOMEShifted home key KEY_SICShifted input key
KEY_SLEFTShifted left arrow key KEY_SMESSAGEShifted message key
KEY_SMOVEShifted move key KEY_SNEXTShifted next key KEY_SOPTIONSShifted
options key KEY_SPREVIOUSShifted prev key KEY_SPRINTShifted print key
KEY_SREDOShifted redo key KEY_SREPLACEShifted replace key KEY_SRIGHT‐
Shifted right arrow KEY_SRSUMEShifted resume key KEY_SSAVEShifted save
key KEY_SSUSPENDShifted suspend key KEY_SUNDOShifted undo key KEY_SUS‐
PENDSuspend key KEY_UNDOUndo key
RETURN VALUE
All routines return the integer ERR upon failure and an integer value
other than ERR upon successful completion.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ MT-LevelUnsafe
SEE ALSO
curs_inopts(3CURSES), curs_move(3CURSES), curses(3CURSES), wre‐
fresh(3CURSES), terminfo(5), attributes(7)
NOTES
The header file <curses.h> automatically includes the header files
<stdio.h>, <unctrl.h> and <widec.h>.
Use of the escape key by a programmer for a single character function
is discouraged.
When using getwch(), wgetwch(), mvgetwch(), or mvwgetwch(), nocbreak
mode and echo mode 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 getwch(), mvgetwch(), and mvwgetwch() may be macros.
Oracle Solaris 11.4 31 Dec 1996 curs_getwch(3CURSES)