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

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form_field_new(3X)							       form_field_new(3X)

       form_field_new - create and destroy form fields

       #include <form.h>
       FIELD *new_field(int height, int width,
			int toprow, int leftcol,
			int offscreen, int nbuffers);
       FIELD *dup_field(FIELD *field, int toprow, int leftcol);
       FIELD *link_field(FIELD *field, int toprow, int leftcol);
       int free_field(FIELD *field);

       The function new_field allocates a new field and initializes it from the parameters given:
       height, width, row of upper-left corner, column of upper-left  corner,  number  off-screen
       rows, and number of additional working buffers.

       The  function  dup_field duplicates a field at a new location.  Most attributes (including
       current contents, size, validation type, buffer count,  growth  threshold,  justification,
       foreground,  background, pad character, options, and user pointer) are copied.  Field sta-
       tus and the field page bit are not copied.

       The function link_field acts like dup_field, but the new field  shares  buffers	with  its
       parent.	Attribute data is separate.

       The function free_field de-allocates storage associated with a field.

       The  function,  new_field,  dup_field,  link_field  return  NULL on error.  They set errno
       according to their success:

       E_OK The routine succeeded.

	    Routine detected an incorrect or out-of-range argument.

	    System error occurred, e.g., malloc failure.

       The function free_field returns one of the following:

       E_OK The routine succeeded.

	    Routine detected an incorrect or out-of-range argument.

	    field is connected.

       curses(3X), form(3X).

       The header file <form.h> automatically includes the header file <curses.h>.

       These routines emulate the System V forms library.  They were not supported on  Version	7
       or BSD versions.

       It may be unwise to count on the set of attributes copied by dup_field being portable; the
       System V forms library documents are not very explicit about what  gets	copied	and  what
       does not.

       Juergen Pfeifer.  Manual pages and adaptation for new curses by Eric S. Raymond.

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