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CentOS 7.0 - man page for deleteln (centos section 3X)

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curs_deleteln(3X)								curs_deleteln(3X)

       deleteln, wdeleteln, insdelln, winsdelln, insertln, winsertln - delete and insert lines in
       a curses window

       #include <curses.h>

       int deleteln(void);
       int wdeleteln(WINDOW *win);
       int insdelln(int n);
       int winsdelln(WINDOW *win, int n);
       int insertln(void);
       int winsertln(WINDOW *win);

       The deleteln and wdeleteln routines delete the line under the cursor in	the  window;  all
       lines  below  the  current  line  are moved up one line.  The bottom line of the window is
       cleared.  The cursor position does not change.

       The insdelln and winsdelln routines, for positive n, insert n  lines  into  the	specified
       window  above  the  current  line.  The n bottom lines are lost.  For negative n, delete n
       lines (starting with the one under the cursor), and move the remaining lines up.  The bot-
       tom n lines are cleared.  The current cursor position remains the same.

       The  insertln  and  winsertln  routines insert a blank line above the current line and the
       bottom line is lost.

       All routines return the integer ERR upon failure and an OK (SVr4 specifies only "an  inte-
       ger value other than ERR") upon successful completion.

       X/Open  defines	no  error conditions.  In this implementation, if the window parameter is
       null, an error is returned.

       These functions are described in the XSI Curses standard, Issue 4.  The standard specifies
       that they return ERR on failure, but specifies no error conditions.

       Note that all but winsdelln may be macros.

       These  routines	do  not require a hardware line delete or insert feature in the terminal.
       In fact, they will not use hardware line delete/insert unless idlok(...,  TRUE)	has  been
       set on the current window.


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