# curs_scr_dump 3x

    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

### scr_dump

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

### scr_restore

           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 physical screen to the way it looked in the
           dump file.

### scr_init

           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(3x) call.  The data  is  declared  in-
           valid

           o   if the terminfo capabilities rmcup and nrrmc exist, also

           o   if  the  terminal  has been written to since the preceding scr_dump
               call.

### scr_set

           The scr_set routine is a combination of scr_restore and  scr_init.   It
           tells the program that the information 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 con-
           sidered invalid "if the time-stamp of the tty is old" but do not define
           "old".

## SEE ALSO

           curses(3x),    curs_initscr(3x),    curs_refresh(3x),    curs_util(3x),
           scr_dump(5), system(3)

                                                                 curs_scr_dump(3x)