curs_scr_dump(3) UNIX Programmer's Manual curs_scr_dump(3)
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);
The scr_dump routine dumps the current contents of the vir-
tual screen to the file filename.
The scr_restore routine sets the virtual screen to the con-
tents 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 preceding scr_dump call.
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(3)].
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.
Note that scr_init, scr_set, and scr_restore may be macros.
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curs_scr_dump(3) UNIX Programmer's Manual curs_scr_dump(3)
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 of the tty is
old" but do not define "old".
curses(3), curs_initscr(3), curs_refresh(3), curs_util(3),
system(3)
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