release/src/router/libncurses/doc/html/man/curs_scr_dump.3x.html

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  30   * @Id: curs_scr_dump.3x,v 1.9 2010/12/04 18:40:45 tom Exp @
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  39 <H1>curs_scr_dump 3x</H1>
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  41 <PRE>
  42 <!-- Manpage converted by man2html 3.0.1 -->
  43 <STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG>                                     <STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG>
  44
  45
  46
  47
  48 </PRE>
  49 <H2>NAME</H2><PRE>
  50        <STRONG>scr_dump</STRONG>, <STRONG>scr_restore</STRONG>, <STRONG>scr_init</STRONG>, <STRONG>scr_set</STRONG> - read (write) a
  51        <STRONG>curses</STRONG> screen from (to) a file
  52
  53
  54 </PRE>
  55 <H2>SYNOPSIS</H2><PRE>
  56        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  57
  58        <STRONG>int</STRONG> <STRONG>scr_dump(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
  59        <STRONG>int</STRONG> <STRONG>scr_restore(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
  60        <STRONG>int</STRONG> <STRONG>scr_init(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
  61        <STRONG>int</STRONG> <STRONG>scr_set(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
  62
  63
  64 </PRE>
  65 <H2>DESCRIPTION</H2><PRE>
  66        The <STRONG>scr_dump</STRONG> routine dumps the  current  contents  of  the
  67        virtual screen to the file <EM>filename</EM>.
  68
  69        The  <STRONG>scr_restore</STRONG>  routine  sets  the virtual screen to the
  70        contents of <EM>filename</EM>, which must have been  written  using
  71        <STRONG>scr_dump</STRONG>.   The  next call to <STRONG>doupdate</STRONG> restores the screen
  72        to the way it looked in the dump file.
  73
  74        The <STRONG>scr_init</STRONG> routine reads in the contents of <EM>filename</EM> and
  75        uses  them  to initialize the <STRONG>curses</STRONG> data structures about
  76        what the terminal currently has on its screen.  If the da-
  77        ta is determined to be valid, <STRONG>curses</STRONG> bases its next update
  78        of the screen on this information rather than clearing the
  79        screen  and starting from scratch.  <STRONG>scr_init</STRONG> is used after
  80        <STRONG>initscr</STRONG> or a <STRONG>system</STRONG> call to share the screen with  another
  81        process  which  has done a <STRONG>scr_dump</STRONG> after its <STRONG>endwin</STRONG> call.
  82        The data is declared invalid if the terminfo  capabilities
  83        <STRONG>rmcup</STRONG> and <STRONG>nrrmc</STRONG> exist; also if the terminal has been writ-
  84        ten to since the preceding <STRONG>scr_dump</STRONG> call.
  85
  86        The <STRONG>scr_set</STRONG> routine is a combination  of  <STRONG>scr_restore</STRONG>  and
  87        <STRONG>scr_init</STRONG>.   It  tells  the program that the information in
  88        <EM>filename</EM> is what is currently on the screen, and also what
  89        the  program  wants on the screen.  This can be thought of
  90        as a screen inheritance function.
  91
  92        To read (write) a window from (to) a file, use the  <STRONG>getwin</STRONG>
  93        and <STRONG>putwin</STRONG> routines [see <STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>].
  94
  95
  96 </PRE>
  97 <H2>RETURN VALUE</H2><PRE>
  98        All  routines  return  the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG>
  99        upon success.
 100
 101        X/Open defines no error conditions.  In  this  implementa-
 102        tion,  each  will  return  an  error if the file cannot be
 103        opened.
 104
 105
 106 </PRE>
 107 <H2>NOTES</H2><PRE>
 108        Note  that  <STRONG>scr_init</STRONG>,  <STRONG>scr_set</STRONG>,  and  <STRONG>scr_restore</STRONG>  may  be
 109        macros.
 110
 111
 112 </PRE>
 113 <H2>PORTABILITY</H2><PRE>
 114        The  XSI  Curses  standard, Issue 4, describes these func-
 115        tions (adding the const qualifiers).
 116
 117        The SVr4 docs merely say under <STRONG>scr_init</STRONG> that the dump data
 118        is  also  considered invalid "if the time-stamp of the tty
 119        is old" but do not define "old".
 120
 121
 122 </PRE>
 123 <H2>SEE ALSO</H2><PRE>
 124        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>,      <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>,       <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>,
 125        <STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>, <STRONG><A HREF="system.3.html">system(3)</A></STRONG>
 126
 127
 128
 129                                                       <STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG>
 130 </PRE>
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