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320 lines
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320 lines
9.2 KiB
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****************************************************************************
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* @Id: form_driver.3x,v 1.9 2002/02/16 22:39:52 tom Exp @
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-->
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<HTML>
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<HEAD>
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<TITLE>form_driver 3x</TITLE>
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<link rev=made href="mailto:bug-ncurses@gnu.org">
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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</HEAD>
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<BODY>
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<H1>form_driver 3x</H1>
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<HR>
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<PRE>
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<!-- Manpage converted by man2html 3.0.1 -->
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<STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG> <STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG>
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</PRE>
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<H2>NAME</H2><PRE>
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<STRONG>form_driver</STRONG> - command-processing loop of the form system
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</PRE>
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<H2>SYNOPSIS</H2><PRE>
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<STRONG>#include</STRONG> <STRONG><form.h></STRONG>
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int form_driver(FORM *form, int c);
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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Once a form has been posted (displayed), you should funnel
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input events to it through <STRONG>form_driver</STRONG>. This routine has
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two major input cases; either the input is a form naviga-
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tion request or it's a printable ASCII character. The
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form driver requests are as follows:
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REQ_NEXT_PAGE
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Move to the next page.
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REQ_PREV_PAGE
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Move to the previous page.
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REQ_FIRST_PAGE
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Move to the first page.
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REQ_LAST_PAGE
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Move to the last field.
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REQ_NEXT_FIELD
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Move to the next field.
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REQ_PREV_FIELD
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Move to the previous field.
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REQ_FIRST_FIELD
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Move to the first field.
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REQ_LAST_FIELD
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Move to the last field.
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REQ_SNEXT_FIELD
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Move to the sorted next field.
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REQ_SPREV_FIELD
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Move to the sorted previous field.
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REQ_SFIRST_FIELD
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Move to the sorted first field.
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REQ_SLAST_FIELD
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Move to the sorted last field.
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REQ_LEFT_FIELD
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Move left to a field.
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REQ_RIGHT_FIELD
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Move right to a field.
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REQ_UP_FIELD
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Move up to a field.
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REQ_DOWN_FIELD
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Move down to a field.
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REQ_NEXT_CHAR
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Move to the next char.
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REQ_PREV_CHAR
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Move to the previous char.
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REQ_NEXT_LINE
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Move to the next line.
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REQ_PREV_LINE
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Move to the previous line.
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REQ_NEXT_WORD
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Move to the next word.
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REQ_PREV_WORD
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Move to the previous word.
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REQ_BEG_FIELD
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Move to the beginning of the field.
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REQ_END_FIELD
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Move to the end of the field.
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REQ_BEG_LINE
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Move to the beginning of the line.
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REQ_END_LINE
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Move to the end of the line.
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REQ_LEFT_CHAR
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Move left in the field.
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REQ_RIGHT_CHAR
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Move right in the field.
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REQ_UP_CHAR
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Move up in the field.
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REQ_DOWN_CHAR
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Move down in the field.
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REQ_NEW_LINE
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Insert or overlay a new line.
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REQ_INS_CHAR
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Insert a blank at the cursor.
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REQ_INS_LINE
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Insert a blank line at the cursor.
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REQ_DEL_CHAR
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Delete character at the cursor.
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REQ_DEL_PREV
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Delete character before the cursor.
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REQ_DEL_LINE
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Delete line at the cursor.
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REQ_DEL_WORD
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Delete blank-delimited word at the cursor.
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REQ_CLR_EOL
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Clear to end of line from cursor.
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REQ_CLR_EOF
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Clear to end of field from cursor.
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REQ_CLR_FIELD
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Clear the entire field.
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REQ_OVL_MODE
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Enter overlay mode.
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REQ_INS_MODE
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Enter insert mode.
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REQ_SCR_FLINE
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Scroll the field forward a line.
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REQ_SCR_BLINE
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Scroll the field backward a line.
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REQ_SCR_FPAGE
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Scroll the field forward a page.
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REQ_SCR_BPAGE
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Scroll the field backward a page.
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REQ_SCR_FHPAGE
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Scroll the field forward half a page.
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REQ_SCR_BHPAGE
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Scroll the field backward half a page.
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REQ_SCR_FCHAR
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Scroll the field forward a character.
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REQ_SCR_BCHAR
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Scroll the field backward a character.
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REQ_SCR_HFLINE
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Horizontal scroll the field forward a line.
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REQ_SCR_HBLINE
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Horizontal scroll the field backward a line.
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REQ_SCR_HFHALF
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Horizontal scroll the field forward half a line.
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REQ_SCR_HBHALF
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Horizontal scroll the field backward half a line.
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REQ_VALIDATION
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Validate field.
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REQ_NEXT_CHOICE
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Display next field choice.
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REQ_PREV_CHOICE
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Display previous field choice.
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If the second argument is a printable ASCII character, the
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driver places it in the current position in the current
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field. If it is one of the forms requests listed above,
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that request is executed.
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If the second argument is neither printable ASCII nor one
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of the above pre-defined form requests, the driver assumes
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it is an application-specific command and returns
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<STRONG>E_UNKNOWN_COMMAND</STRONG>. Application-defined commands should be
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defined relative to <STRONG>MAX_COMMAND</STRONG>, the maximum value of
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these pre-defined requests.
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</PRE>
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<H2>RETURN VALUE</H2><PRE>
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<STRONG>form_driver</STRONG> return one of the following error codes:
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<STRONG>E_OK</STRONG> The routine succeeded.
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<STRONG>E_SYSTEM_ERROR</STRONG>
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System error occurred (see <STRONG>errno</STRONG>).
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<STRONG>E_BAD_ARGUMENT</STRONG>
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Routine detected an incorrect or out-of-range argu-
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ment.
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<STRONG>E_BAD_STATE</STRONG>
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Routine was called from an initialization or termina-
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tion function.
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<STRONG>E_NOT_POSTED</STRONG>
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The form has not been posted.
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<STRONG>E_UNKNOWN_COMMAND</STRONG>
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The form driver code saw an unknown request code.
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<STRONG>E_INVALID_FIELD</STRONG>
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Contents of field is invalid.
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<STRONG>E_REQUEST_DENIED</STRONG>
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The form driver could not process the request.
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>.
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</PRE>
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<H2>NOTES</H2><PRE>
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The header file <STRONG><form.h></STRONG> automatically includes the header
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files <STRONG><curses.h></STRONG>.
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</PRE>
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<H2>PORTABILITY</H2><PRE>
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These routines emulate the System V forms library. They
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were not supported on Version 7 or BSD versions.
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</PRE>
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<H2>AUTHORS</H2><PRE>
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Juergen Pfeifer. Manual pages and adaptation for new
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curses by Eric S. Raymond.
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<STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG>
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</PRE>
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<HR>
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<ADDRESS>
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Man(1) output converted with
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<a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a>
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</ADDRESS>
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</BODY>
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</HTML>
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