ncurses 5.0

[ncurses.git] / man / curs_scr_dmp.3x

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-.TH curs_scr_dump 3X ""
-.SH NAME
-\fBscr_dump\fR, \fBscr_restore\fR,
-\fBscr_init\fR, \fBscr_set\fR - read (write) a \fBcurses\fR screen
-from (to) a file
-.SH SYNOPSIS
-\fB#include <curses.h>\fR
-
-\fBint scr_dump(const char *filename);\fR
-.br
-\fBint scr_restore(const char *filename);\fR
-.br
-\fBint scr_init(const char *filename);\fR
-.br
-\fBint scr_set(const char *filename);\fR
-.br
-.SH DESCRIPTION
-The \fBscr_dump\fR routine dumps the current contents of the virtual screen
-to the file \fIfilename\fR.
-
-The \fBscr_restore\fR routine sets the virtual screen to the contents
-of \fIfilename\fR, which must have been written using \fBscr_dump\fR.  The next
-call to \fBdoupdate\fR restores the screen to the way it looked in the dump
-file.
-
-The \fBscr_init\fR routine reads in the contents of \fIfilename\fR and uses
-them to initialize the \fBcurses\fR data structures about what the terminal
-currently has on its screen.  If the data is determined to be valid,
-\fBcurses\fR bases its next update of the screen on this information rather
-than clearing the screen and starting from scratch.  \fBscr_init\fR is used
-after \fBinitscr\fR or a \fBsystem\fR [see \fBsystem\fR(BA_LIB)] call to share
-the screen with another process which has done a \fBscr_dump\fR after its
-\fBendwin\fR call.  The data is declared invalid if the terminfo capabilities
-\fBrmcup\fR and \fBnrrmc\fR exist; also if the terminal has been written to
-since the preceding \fBscr_dump\fR call.
-
-The \fBscr_set\fR routine is a combination of \fBscr_restore\fR and
-\fBscr_init\fR.  It tells the program that the information in \fIfilename\fR 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 \fBgetwin\fR and
-\fBputwin\fR routines [see \fBcurs_util\fR(3X)].
-.SH RETURN VALUE
-All routines return the integer \fBERR\fR upon failure and \fBOK\fR
-upon success.
-.SH NOTES
-Note that \fBscr_init\fR, \fBscr_set\fR, and \fBscr_restore\fR may be macros.
-.SH PORTABILITY
-The XSI Curses standard, Issue 4, describes these functions (adding the const
-qualifiers).
-
-The SVr4 docs merely say under \fBscr_init\fR that the dump data is also
-considered invalid "if the time-stamp of the tty is old" but don't define
-"old".
-.SH SEE ALSO
-\fBcurses\fR(3X), \fBcurs_initscr\fR(3X), \fBcurs_refresh\fR(3X),
-\fBcurs_util\fR(3X), \fBsystem\fR(3S)
-.\"#
-.\"# The following sets edit modes for GNU EMACS
-.\"# Local Variables:
-.\"# mode:nroff
-.\"# fill-column:79
-.\"# End: