Страницы справочника OS X

Эта страница руководства является частью версии 5.0 Инструментов XCode

Читать страницы руководства

curs_scr_dump (3X)                                                                          curs_scr_dump (3X)



NAME
       scr_dump, scr_restore, scr_init, scr_set - read (write) a curses screen from (to) a file

SYNOPSIS
       #include <curses.h>

       int scr_dump(const char *filename);
       int scr_restore(const char *filename);
       int scr_init(const char *filename);
       int scr_set(const char *filename);

DESCRIPTION
       The scr_dump routine dumps the current contents of the virtual screen to the file filename.

       The  scr_restore  routine  sets  the virtual screen to the contents of filename, which must have been
       written using scr_dump.  The next call to doupdate restores the screen to the way it  looked  in  the
       dump file.

       The  scr_init  routine  reads in the contents of filename and uses them to initialize the curses data
       structures about what the terminal currently has on its screen.  If the  data  is  determined  to  be
       valid, curses bases its next update of the screen on this information rather than clearing the screen
       and starting from scratch.  scr_init is used after initscr or a system call to share the screen  with
       another process which has done a scr_dump after its endwin call.  The data is declared invalid if the
       terminfo capabilities rmcup and nrrmc exist; also if the terminal has been written to since the  pre-ceding preceding
       ceding scr_dump call.

       The  scr_set routine is a combination of scr_restore and scr_init.  It tells the program that the in-formation information
       formation in filename is what is currently on the screen, and also what  the  program  wants  on  the
       screen.  This can be thought of as a screen inheritance function.

       To read (write) a window from (to) a file, use the getwin and putwin routines [see curs_util(3X)].

RETURN VALUE
       All routines return the integer ERR upon failure and OK upon success.

       X/Open  defines  no  error conditions.  In this implementation, each will return an error if the file
       cannot be opened.

NOTES
       Note that scr_init, scr_set, and scr_restore may be macros.

PORTABILITY
       The XSI Curses standard, Issue 4, describes these functions (adding the const qualifiers).

       The SVr4 docs merely say under scr_init that the dump data is also considered invalid "if  the  time-stamp timestamp
       stamp of the tty is old" but do not define "old".

SEE ALSO
       curses(3X), curs_initscr(3X), curs_refresh(3X), curs_util(3X), система (3)



                                                                                           curs_scr_dump (3X)