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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | PORTABILITY | SEE ALSO | COLOPHON |
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curs_scr_dump(3X) curs_scr_dump(3X)
scr_dump, scr_restore, scr_init, scr_set - read (write) a curses
screen from (to) a file
#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);
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 ter‐
minal currently has on its screen. If the data is determined to
be valid, curses bases its next update of the screen on this in‐
formation rather than clearing the screen and starting from
scratch. scr_init is used after initscr(3X) or a system(3) call
to share the screen with another process which has done a
scr_dump after its endwin(3X) call. The data is declared invalid
• if the terminfo capabilities rmcup and nrrmc exist, also
• 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)].
All routines return the integer ERR upon failure and OK upon suc‐
cess.
X/Open defines no error conditions. In this implementation, each
will return an error if the file cannot be opened.
Note that scr_init, scr_set, and scr_restore may be macros.
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 al‐
so considered invalid "if the time-stamp of the tty is old" but
do not define “old”.
curses(3X), curs_initscr(3X), curs_refresh(3X), curs_util(3X),
scr_dump(5), system(3)
This page is part of the ncurses (new curses) project. Informa‐
tion about the project can be found at
⟨https://www.gnu.org/software/ncurses/ncurses.html⟩. If you have
a bug report for this manual page, send it to
bug-ncurses-request@gnu.org. This page was obtained from the
project's upstream Git mirror of the CVS repository
⟨https://github.com/mirror/ncurses.git⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2023-03-12.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
curs_scr_dump(3X)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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