Command Section
curs_attr(3X)                                                    curs_attr(3X)

       attroff, wattroff, attron, wattron, attrset, wattrset, color_set,
       wcolor_set, standend, wstandend, standout, wstandout, attr_get,
       wattr_get, attr_off, wattr_off, attr_on, wattr_on, attr_set, wattr_set,
       chgat, wchgat, mvchgat, mvwchgat, PAIR_NUMBER - curses character and
       window attribute control routines

       #include <curses.h>
       int attroff(int attrs);
       int wattroff(WINDOW *win, int attrs);
       int attron(int attrs);
       int wattron(WINDOW *win, int attrs);
       int attrset(int attrs);
       int wattrset(WINDOW *win, int attrs);
       int color_set(short color_pair_number, void* opts);
       int wcolor_set(WINDOW *win, short color_pair_number,
             void* opts);
       int standend(void);
       int wstandend(WINDOW *win);
       int standout(void);
       int wstandout(WINDOW *win);
       int attr_get(attr_t *attrs, short *pair, void *opts);
       int wattr_get(WINDOW *win, attr_t *attrs, short *pair,
              void *opts);
       int attr_off(attr_t attrs, void *opts);
       int wattr_off(WINDOW *win, attr_t attrs, void *opts);
       int attr_on(attr_t attrs, void *opts);
       int wattr_on(WINDOW *win, attr_t attrs, void *opts);
       int attr_set(attr_t attrs, short pair, void *opts);
       int wattr_set(WINDOW *win, attr_t attrs, short pair, void *opts);
       int chgat(int n, attr_t attr, short color,
             const void *opts)
       int wchgat(WINDOW *win, int n, attr_t attr,
             short color, const void *opts)
       int mvchgat(int y, int x, int n, attr_t attr,
             short color, const void *opts)
       int mvwchgat(WINDOW *win, int y, int x, int n,
             attr_t attr, short color, const void *opts)

       These routines manipulate the current attributes of the named window.
       The current attributes of a window apply to all characters that are
       written into the window with waddch, waddstr and wprintw.  Attributes
       are a property of the character, and move with the character through
       any scrolling and insert/delete line/character operations.  To the
       extent possible, they are displayed as appropriate modifications to the
       graphic rendition of characters put on the screen.

       The routine attrset sets the current attributes of the given window to
       attrs.  The routine attroff turns off the named attributes without
       turning any other attributes on or off.  The routine attron turns on
       the named attributes without affecting any others.  The routine
       standout is the same as attron(A_STANDOUT).  The routine standend is
       the same as attrset(A_NORMAL) or attrset(0), that is, it turns off all

       The attrset and related routines do not affect the attributes used when
       erasing portions of the window.  See curs_bkgd(3X) for functions which
       modify the attributes used for erasing and clearing.

       The routine color_set sets the current color of the given window to the
       foreground/background combination described by the color_pair_number.
       The parameter opts is reserved for future use, applications must supply
       a null pointer.

       The routine wattr_get returns the current attribute and color pair for
       the given window; attr_get returns the current attribute and color pair
       for stdscr.  The remaining attr_* functions operate exactly like the
       corresponding attr* functions, except that they take arguments of type
       attr_t rather than int.

       The routine chgat changes the attributes of a given number of
       characters starting at the current cursor location of stdscr.  It does
       not update the cursor and does not perform wrapping.  A character count
       of -1 or greater than the remaining window width means to change
       attributes all the way to the end of the current line.  The wchgat
       function generalizes this to any window; the mvwchgat function does a
       cursor move before acting.  In these functions, the color argument is a
       color-pair index (as in the first argument of init_pair, see
       curs_color(3X)).  The opts argument is not presently used, but is
       reserved for the future (leave it NULL).

       The following video attributes, defined in <curses.h>, can be passed to
       the routines attron, attroff, and attrset, or OR'd with the characters
       passed to addch.

              Name            Description
              A_NORMAL        Normal display (no highlight)
              A_STANDOUT      Best highlighting mode of the terminal.
              A_UNDERLINE     Underlining
              A_REVERSE       Reverse video
              A_BLINK         Blinking
              A_DIM           Half bright
              A_BOLD          Extra bright or bold
              A_PROTECT       Protected mode
              A_INVIS         Invisible or blank mode
              A_ALTCHARSET    Alternate character set
              A_ITALIC        Italics (non-X/Open extension)
              A_CHARTEXT      Bit-mask to extract a character
              COLOR_PAIR(n)   Color-pair number n

       These video attributes are supported by attr_on and related functions
       (which also support the attributes recognized by attron, etc.):

              Name            Description
              WA_HORIZONTAL   Horizontal highlight
              WA_LEFT         Left highlight
              WA_LOW          Low highlight
              WA_RIGHT        Right highlight
              WA_TOP          Top highlight
              WA_VERTICAL     Vertical highlight

       For consistency

       The following macro is the reverse of COLOR_PAIR(n):

       PAIR_NUMBER(attrs) Returns the pair number associated
                          with the COLOR_PAIR(n) attribute.

       The return values of many of these routines are not meaningful (they
       are implemented as macro-expanded assignments and simply return their
       argument).  The SVr4 manual page claims (falsely) that these routines
       always return 1.

       Note that attroff, wattroff, attron, wattron, attrset, wattrset,
       standend and standout may be macros.

       COLOR_PAIR values can only be OR'd with attributes if the pair number
       is less than 256.  The alternate functions such as color_set can pass a
       color pair value directly.  However, ncurses ABI 4 and 5 simply OR this
       value within the alternate functions.  You must use ncurses ABI 6 to
       support more than 256 color pairs.

       These functions are supported in the XSI Curses standard, Issue 4.  The
       standard defined the dedicated type for highlights, attr_t, which is
       not defined in SVr4 curses. The functions taking attr_t arguments are
       not supported under SVr4.

       The XSI Curses standard states that whether the traditional functions
       attron/attroff/attrset can manipulate attributes other than A_BLINK,
       A_BOLD, A_DIM, A_REVERSE, A_STANDOUT, or A_UNDERLINE is "unspecified".
       Under this implementation as well as SVr4 curses, these functions
       correctly manipulate all other highlights (specifically, A_ALTCHARSET,
       A_PROTECT, and A_INVIS).

       This implementation provides the A_ITALIC attribute for terminals which
       have the enter_italics_mode (sitm) and exit_italics_mode (ritm)
       capabilities.  Italics are not mentioned in X/Open Curses.  Unlike the
       other video attributes, I_ITALIC is unrelated to the set_attributes
       capabilities.  This implementation makes the assumption that
       exit_attribute_mode may also reset italics.

       XSI Curses added the new entry points, attr_get, attr_on, attr_off,
       attr_set, wattr_on, wattr_off, wattr_get, wattr_set.  These are
       intended to work with a new series of highlight macros prefixed with
       WA_.  The older macros have direct counterparts in the newer set of

              Name            Description
              WA_NORMAL       Normal display (no highlight)
              WA_STANDOUT     Best highlighting mode of the terminal.
              WA_UNDERLINE    Underlining
              WA_REVERSE      Reverse video
              WA_BLINK        Blinking
              WA_DIM          Half bright
              WA_BOLD         Extra bright or bold
              WA_ALTCHARSET   Alternate character set

       Older versions of this library did not force an update of the screen
       when changing the attributes.  Use touchwin to force the screen to
       match the updated attributes.

       The XSI curses standard specifies that each pair of corresponding A_
       and WA_-using functions operates on the same current-highlight

       The XSI standard extended conformance level adds new highlights
       corresponding WA_ macros for each).  As of August 2013, no known
       terminal provides these highlights (i.e., via the sgr1 capability).

       All routines return the integer OK on success, or ERR on failure.

       X/Open does not define any error conditions.

       This implementation returns an error if the window pointer is null.
       The wcolor_set function returns an error if the color pair parameter is
       outside the range 0..COLOR_PAIRS-1.  This implementation also provides
       getattrs for compatibility with older versions of curses.

       Functions with a "mv" prefix first perform a cursor movement using
       wmove, and return an error if the position is outside the window, or if
       the window pointer is null.

       curses(3X), curs_addch(3X), curs_addstr(3X), curs_bkgd(3X),
       curs_printw(3X), curs_variables(3X)

Command Section