doc/html/man/curs_scr_dump.3x.html

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  41 <H1 class="no-header">curs_scr_dump 3x</H1>
  42 <PRE>
  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><H2><a name="h2-NAME">NAME</a></H2><PRE>
  49        <STRONG>scr_dump</STRONG>, <STRONG>scr_restore</STRONG>, <STRONG>scr_init</STRONG>, <STRONG>scr_set</STRONG> - read (write) a <STRONG>curses</STRONG> screen
  50        from (to) a file
  51
  52
  53 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
  54        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  55
  56        <STRONG>int</STRONG> <STRONG>scr_dump(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
  57        <STRONG>int</STRONG> <STRONG>scr_restore(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
  58        <STRONG>int</STRONG> <STRONG>scr_init(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
  59        <STRONG>int</STRONG> <STRONG>scr_set(const</STRONG> <STRONG>char</STRONG> <STRONG>*filename);</STRONG>
  60
  61
  62 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
  63        The <STRONG>scr_dump</STRONG> routine dumps the current contents of the  <EM>virtual</EM>  <EM>screen</EM>
  64        to the file <EM>filename</EM>.
  65
  66        The  <STRONG>scr_restore</STRONG>  routine  sets  the  <EM>virtual</EM> <EM>screen</EM> to the contents of
  67        <EM>filename</EM>, which must have been written using <STRONG>scr_dump</STRONG>.  The  next  call
  68        to  <STRONG>doupdate</STRONG>  restores  the <EM>physical</EM> <EM>screen</EM> to the way it looked in the
  69        dump file.
  70
  71        The <STRONG>scr_init</STRONG> routine reads in the contents of <EM>filename</EM> and uses them to
  72        initialize the <STRONG>curses</STRONG> data structures about what the terminal currently
  73        has on its screen.  If the data is determined to be valid, <STRONG>curses</STRONG> bases
  74        its  next update of the screen on this information rather than clearing
  75        the screen and starting from scratch.  <STRONG>scr_init</STRONG> is used  after  <STRONG>initscr</STRONG>
  76        or  a  <STRONG>system</STRONG>  call  to share the screen with another process which has
  77        done a <STRONG>scr_dump</STRONG> after its <STRONG><A HREF="curs_initscr.3x.html">endwin(3x)</A></STRONG> call.  The data  is  declared  in-
  78        valid
  79
  80        <STRONG>o</STRONG>   if the terminfo capabilities <STRONG>rmcup</STRONG> and <STRONG>nrrmc</STRONG> exist, also
  81
  82        <STRONG>o</STRONG>   if  the  terminal  has been written to since the preceding <STRONG>scr_dump</STRONG>
  83            call.
  84
  85        The <STRONG>scr_set</STRONG> routine is a combination of <STRONG>scr_restore</STRONG> and  <STRONG>scr_init</STRONG>.   It
  86        tells the program that the information in <EM>filename</EM> is what is currently
  87        on the screen, and also what the program wants on the screen.  This can
  88        be thought of as a screen inheritance function.
  89
  90        To  read  (write)  a window from (to) a file, use the <STRONG>getwin</STRONG> and <STRONG>putwin</STRONG>
  91        routines [see <STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>].
  92
  93
  94 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
  95        All routines return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> upon success.
  96
  97        X/Open defines no error conditions.  In this implementation, each  will
  98        return an error if the file cannot be opened.
  99
 100
 101 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
 102        Note that <STRONG>scr_init</STRONG>, <STRONG>scr_set</STRONG>, and <STRONG>scr_restore</STRONG> may be macros.
 103
 104
 105 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
 106        The XSI Curses standard, Issue 4, describes these functions (adding the
 107        const qualifiers).
 108
 109        The SVr4 docs merely say under <STRONG>scr_init</STRONG> that the dump data is also con-
 110        sidered invalid "if the time-stamp of the tty is old" but do not define
 111        "old".
 112
 113
 114 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 115        <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>,    <STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>,
 116        <STRONG><A HREF="scr_dump.5.html">scr_dump(5)</A></STRONG>, <STRONG>system(3)</STRONG>
 117
 118
 119
 120                                                              <STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG>
 121 </PRE>
 122 <div class="nav">
 123 <ul>
 124 <li><a href="#h2-NAME">NAME</a></li>
 125 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 126 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
 127 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 128 <li><a href="#h2-NOTES">NOTES</a></li>
 129 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 130 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 131 </ul>
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