* Add the readline(3) API to libedit. The libedit versions of

  {readline,history}.h are in /usr/include/edit so as to not conflict with
  the GNU libreadline versions.  To use the libedit readline(3) one should
  add "-I/usr/include/edit" to their Makefile
  (spelled "-I${DESTDIR}/${INCLUDEDIR}/edit" within the FreeBSD source tree).

* Enable its use in the BSD licensed utilities that support readline(3).

* To make it easier to sync libedit development with NetBSD, histedit.h
  is moved into libedit's directory as history shows shown we keep merging
  it into that location.

Obtained from:	NetBSD
Sponsored by:	Juniper Networks

8 files changed, 2997 insertions, 4 deletions

diff --git a/lib/libedit/Makefile b/lib/libedit/Makefile
index afcf1af..d8ae646 100644
--- a/lib/libedit/Makefile
+++ b/lib/libedit/Makefile
@@ -26,18 +26,23 @@ MLINKS=	editline.3 el_deletestr.3 editline.3 el_end.3 editline.3 el_init.3 \
 	editline.3 tok_line.3 editline.3 tok_str.3
 
 # For speed and debugging
-#SRCS=   ${OSRCS} tokenizer.c history.c
+#SRCS=   ${OSRCS}
 # For protection
-SRCS=	editline.c tokenizer.c history.c
+SRCS=	editline.c
+SRCS+=	tokenizer.c history.c readline.c
 SRCS+=	common.h emacs.h fcns.h help.h vi.h
 CLEANFILES+= common.h editline.c emacs.h fcns.c fcns.h help.c help.h vi.h
 
-CFLAGS+= -I. -I${.CURDIR}
+INCS=	histedit.h
+
+CFLAGS+= -I. -I${.CURDIR} -I${.CURDIR}/edit
 CFLAGS+= #-DDEBUG_TTY -DDEBUG_KEY -DDEBUG_READ -DDEBUG -DDEBUG_REFRESH
 CFLAGS+= #-DDEBUG_PASTE -DDEBUG_EDIT
 
 WARNS?=	1
 
+SUBDIR= edit/readline
+
 AHDR=	vi.h emacs.h common.h
 ASRC=	${.CURDIR}/vi.c ${.CURDIR}/emacs.c ${.CURDIR}/common.c
 
diff --git a/lib/libedit/chartype.h b/lib/libedit/chartype.h
new file mode 100644
index 0000000..f5440b4
--- /dev/null
+++ b/lib/libedit/chartype.h
@@ -0,0 +1,245 @@
+/*	$NetBSD: chartype.h,v 1.6 2010/04/20 02:01:13 christos Exp $	*/
+
+/*-
+ * Copyright (c) 2009 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _h_chartype_f
+#define _h_chartype_f
+
+
+
+#ifdef WIDECHAR
+
+/* Ideally we should also test the value of the define to see if it
+ * supports non-BMP code points without requiring UTF-16, but nothing
+ * seems to actually advertise this properly, despite Unicode 3.1 having
+ * been around since 2001... */
+#if !defined(__NetBSD__) && !defined(__sun) && !(defined(__APPLE__) && defined(__MACH__))
+#ifndef __STDC_ISO_10646__
+/* In many places it is assumed that the first 127 code points are ASCII
+ * compatible, so ensure wchar_t indeed does ISO 10646 and not some other
+ * funky encoding that could break us in weird and wonderful ways. */
+	#error wchar_t must store ISO 10646 characters
+#endif
+#endif
+
+/* Oh for a <uchar.h> with char32_t and __STDC_UTF_32__ in it...
+ * ref: ISO/IEC DTR 19769
+ */
+#if WCHAR_MAX < INT32_MAX
+#warning Build environment does not support non-BMP characters
+#endif
+
+#define ct_mbtowc            mbtowc
+#define ct_mbtowc_reset      mbtowc(0,0,0)
+#define ct_wctomb            wctomb
+#define ct_wctomb_reset      wctomb(0,0)
+#define ct_wcstombs          wcstombs
+#define ct_mbstowcs          mbstowcs
+
+#define Char			wchar_t
+#define Int			wint_t
+#define FUN(prefix,rest)	prefix ## _w ## rest
+#define FUNW(type)		type ## _w
+#define TYPE(type)		type ## W
+#define FSTR			"%ls"
+#define STR(x) 			L ## x
+#define UC(c)			c
+#define Isalpha(x)  iswalpha(x)
+#define Isalnum(x)  iswalnum(x)
+#define Isgraph(x)  iswgraph(x)
+#define Isspace(x)  iswspace(x)
+#define Isdigit(x)  iswdigit(x)
+#define Iscntrl(x)  iswcntrl(x)
+#define Isprint(x)  iswprint(x)
+
+#define Isupper(x)  iswupper(x)
+#define Islower(x)  iswlower(x)
+#define Toupper(x)  towupper(x)
+#define Tolower(x)  towlower(x)
+
+#define IsASCII(x)  (x < 0x100)
+
+#define Strlen(x)       wcslen(x)
+#define Strchr(s,c)     wcschr(s,c)
+#define Strrchr(s,c)    wcsrchr(s,c)
+#define Strstr(s,v)     wcsstr(s,v)
+#define Strdup(x)       wcsdup(x)
+#define Strcpy(d,s)     wcscpy(d,s)
+#define Strncpy(d,s,n)  wcsncpy(d,s,n)
+#define Strncat(d,s,n)  wcsncat(d,s,n)
+
+#define Strcmp(s,v)     wcscmp(s,v)
+#define Strncmp(s,v,n)  wcsncmp(s,v,n)
+#define Strcspn(s,r)    wcscspn(s,r)
+
+#define Strtol(p,e,b)   wcstol(p,e,b)
+
+#define Width(c)	wcwidth(c)
+
+#else /* NARROW */
+
+#define ct_mbtowc            error
+#define ct_mbtowc_reset      
+#define ct_wctomb            error
+#define ct_wctomb_reset      
+#define ct_wcstombs(a, b, c)    (strncpy(a, b, c), strlen(a))
+#define ct_mbstowcs(a, b, c)    (strncpy(a, b, c), strlen(a))
+
+#define Char			char
+#define Int			int
+#define FUN(prefix,rest)	prefix ## _ ## rest
+#define FUNW(type)		type
+#define TYPE(type)		type
+#define FSTR			"%s"
+#define STR(x) 			x
+#define UC(c)			(unsigned char)(c)
+
+#define Isalpha(x)  isalpha((unsigned char)x)
+#define Isalnum(x)  isalnum((unsigned char)x)
+#define Isgraph(x)  isgraph((unsigned char)x)
+#define Isspace(x)  isspace((unsigned char)x)
+#define Isdigit(x)  isdigit((unsigned char)x)
+#define Iscntrl(x)  iscntrl((unsigned char)x)
+#define Isprint(x)  isprint((unsigned char)x)
+
+#define Isupper(x)  isupper((unsigned char)x)
+#define Islower(x)  islower((unsigned char)x)
+#define Toupper(x)  toupper((unsigned char)x)
+#define Tolower(x)  tolower((unsigned char)x)
+
+#define IsASCII(x)  isascii((unsigned char)x)
+
+#define Strlen(x)       strlen(x)
+#define Strchr(s,c)     strchr(s,c)
+#define Strrchr(s,c)    strrchr(s,c)
+#define Strstr(s,v)     strstr(s,v)
+#define Strdup(x)       strdup(x)
+#define Strcpy(d,s)     strcpy(d,s)
+#define Strncpy(d,s,n)  strncpy(d,s,n)
+#define Strncat(d,s,n)  strncat(d,s,n)
+
+#define Strcmp(s,v)     strcmp(s,v)
+#define Strncmp(s,v,n)  strncmp(s,v,n)
+#define Strcspn(s,r)    strcspn(s,r)
+
+#define Strtol(p,e,b)   strtol(p,e,b)
+
+#define Width(c)	1
+
+#endif
+
+
+#ifdef WIDECHAR
+/*
+ * Conversion buffer
+ */
+typedef struct ct_buffer_t {
+        char    *cbuff;
+        size_t  csize;
+        Char *wbuff;
+        size_t  wsize;
+} ct_buffer_t;
+
+#define ct_encode_string __ct_encode_string
+/* Encode a wide character string and return the UTF-8 encoded result. */
+public char *ct_encode_string(const Char *, ct_buffer_t *);
+
+#define ct_decode_string __ct_decode_string
+/* Decode a (multi)?byte string and return the wide character string result. */
+public Char *ct_decode_string(const char *, ct_buffer_t *);
+
+/* Decode a (multi)?byte argv string array.
+ * The pointer returned must be free()d when done. */
+protected Char **ct_decode_argv(int, const char *[],  ct_buffer_t *);
+
+/* Resizes the conversion buffer(s) if needed. */
+protected void ct_conv_buff_resize(ct_buffer_t *, size_t, size_t);
+protected ssize_t ct_encode_char(char *, size_t, Char);
+protected size_t ct_enc_width(Char);
+
+#define ct_free_argv(s)	el_free(s)
+
+#else
+#define	ct_encode_string(s, b)	(s)
+#define ct_decode_string(s, b)	(s)
+#define ct_decode_argv(l, s, b)	(s)
+#define ct_conv_buff_resize(b, os, ns)
+#define ct_encode_char(d, l, s)	(*d = s, 1)
+#define ct_free_argv(s)
+#endif
+
+#ifndef NARROWCHAR
+/* Encode a characted into the destination buffer, provided there is sufficent
+ * buffer space available. Returns the number of bytes used up (zero if the
+ * character cannot be encoded, -1 if there was not enough space available). */
+
+/* The maximum buffer size to hold the most unwieldly visual representation,
+ * in this case \U+nnnnn. */
+#define VISUAL_WIDTH_MAX 8
+
+/* The terminal is thought of in terms of X columns by Y lines. In the cases
+ * where a wide character takes up more than one column, the adjacent 
+ * occupied column entries will contain this faux character. */
+#define MB_FILL_CHAR ((Char)-1)
+
+/* Visual width of character c, taking into account ^? , \0177 and \U+nnnnn
+ * style visual expansions. */
+protected int ct_visual_width(Char);
+
+/* Turn the given character into the appropriate visual format, matching
+ * the width given by ct_visual_width(). Returns the number of characters used
+ * up, or -1 if insufficient space. Buffer length is in count of Char's. */
+protected ssize_t ct_visual_char(Char *, size_t, Char);
+
+/* Convert the given string into visual format, using the ct_visual_char()
+ * function. Uses a static buffer, so not threadsafe. */
+protected const Char *ct_visual_string(const Char *);
+
+
+/* printable character, use ct_visual_width() to find out display width */
+#define CHTYPE_PRINT        ( 0)
+/* control character found inside the ASCII portion of the charset */
+#define CHTYPE_ASCIICTL     (-1)
+/* a \t */
+#define CHTYPE_TAB          (-2)
+/* a \n */
+#define CHTYPE_NL           (-3)
+/* non-printable character */
+#define CHTYPE_NONPRINT     (-4)
+/* classification of character c, as one of the above defines */
+protected int ct_chr_class(Char c);
+#endif
+
+
+#endif /* _chartype_f */
diff --git a/lib/libedit/edit/readline/Makefile b/lib/libedit/edit/readline/Makefile
new file mode 100644
index 0000000..948288a
--- /dev/null
+++ b/lib/libedit/edit/readline/Makefile
@@ -0,0 +1,8 @@
+# Copyright (c) 2011 David E O'Brien
+# $FreeBSD$
+
+INCS=	readline.h history.h
+
+INCSDIR= ${INCLUDEDIR}/edit/readline
+
+.include <bsd.lib.mk>
diff --git a/lib/libedit/edit/readline/history.h b/lib/libedit/edit/readline/history.h
new file mode 100644
index 0000000..1b84338
--- /dev/null
+++ b/lib/libedit/edit/readline/history.h
@@ -0,0 +1,32 @@
+/*-
+ * Copyright (c) 2011 David E. O'Brien
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the author nor the names of contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <edit/readline/readline.h>
diff --git a/lib/libedit/edit/readline/readline.h b/lib/libedit/edit/readline/readline.h
new file mode 100644
index 0000000..db16ecc
--- /dev/null
+++ b/lib/libedit/edit/readline/readline.h
@@ -0,0 +1,222 @@
+/*	$NetBSD: readline.h,v 1.31 2010/08/04 20:29:18 christos Exp $	*/
+
+/*-
+ * Copyright (c) 1997 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jaromir Dolecek.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef _READLINE_H_
+#define _READLINE_H_
+
+#include <sys/types.h>
+#include <stdio.h>
+
+/* list of readline stuff supported by editline library's readline wrapper */
+
+/* typedefs */
+typedef int	  Function(const char *, int);
+typedef void	  VFunction(void);
+typedef void	  VCPFunction(char *);
+typedef char	 *CPFunction(const char *, int);
+typedef char	**CPPFunction(const char *, int, int);
+typedef char     *rl_compentry_func_t(const char *, int);
+typedef int	  rl_command_func_t(int, int);
+
+/* only supports length */
+typedef struct {
+	int length;
+} HISTORY_STATE;
+
+typedef void *histdata_t;
+
+typedef struct _hist_entry {
+	const char	*line;
+	histdata_t 	 data;
+} HIST_ENTRY;
+
+typedef struct _keymap_entry {
+	char type;
+#define ISFUNC	0
+#define ISKMAP	1
+#define ISMACR	2
+	Function *function;
+} KEYMAP_ENTRY;
+
+#define KEYMAP_SIZE	256
+
+typedef KEYMAP_ENTRY KEYMAP_ENTRY_ARRAY[KEYMAP_SIZE];
+typedef KEYMAP_ENTRY *Keymap;
+
+#define control_character_threshold	0x20
+#define control_character_bit		0x40
+
+#ifndef CTRL
+#include <sys/ioctl.h>
+#if !defined(__sun) && !defined(__hpux) && !defined(_AIX)
+#include <sys/ttydefaults.h>
+#endif
+#ifndef CTRL
+#define CTRL(c)		((c) & 037)
+#endif
+#endif
+#ifndef UNCTRL
+#define UNCTRL(c)	(((c) - 'a' + 'A')|control_character_bit)
+#endif
+
+#define RUBOUT		0x7f
+#define ABORT_CHAR	CTRL('G')
+#define RL_READLINE_VERSION 	0x0402
+#define RL_PROMPT_START_IGNORE	'\1'
+#define RL_PROMPT_END_IGNORE	'\2'
+
+/* global variables used by readline enabled applications */
+#ifdef __cplusplus
+extern "C" {
+#endif
+extern const char	*rl_library_version;
+extern int 		rl_readline_version; 
+extern char		*rl_readline_name;
+extern FILE		*rl_instream;
+extern FILE		*rl_outstream;
+extern char		*rl_line_buffer;
+extern int		 rl_point, rl_end;
+extern int		 history_base, history_length;
+extern int		 max_input_history;
+extern char		*rl_basic_word_break_characters;
+extern char		*rl_completer_word_break_characters;
+extern char		*rl_completer_quote_characters;
+extern Function		*rl_completion_entry_function;
+extern CPPFunction	*rl_attempted_completion_function;
+extern int		 rl_attempted_completion_over;
+extern int		rl_completion_type;
+extern int		rl_completion_query_items;
+extern char		*rl_special_prefixes;
+extern int		rl_completion_append_character;
+extern int		rl_inhibit_completion;
+extern Function		*rl_pre_input_hook;
+extern Function		*rl_startup_hook;
+extern char		*rl_terminal_name;
+extern int		rl_already_prompted;
+extern char		*rl_prompt;
+/*
+ * The following is not implemented
+ */
+extern KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
+			emacs_meta_keymap,
+			emacs_ctlx_keymap;
+extern int		rl_filename_completion_desired;
+extern int		rl_ignore_completion_duplicates;
+extern int		(*rl_getc_function)(FILE *);
+extern VFunction	*rl_redisplay_function;
+extern VFunction	*rl_completion_display_matches_hook;
+extern VFunction	*rl_prep_term_function;
+extern VFunction	*rl_deprep_term_function;
+extern int		readline_echoing_p;
+extern int		_rl_print_completions_horizontally;
+
+/* supported functions */
+char		*readline(const char *);
+int		 rl_initialize(void);
+
+void		 using_history(void);
+int		 add_history(const char *);
+void		 clear_history(void);
+void		 stifle_history(int);
+int		 unstifle_history(void);
+int		 history_is_stifled(void);
+int		 where_history(void);
+HIST_ENTRY	*current_history(void);
+HIST_ENTRY	*history_get(int);
+HIST_ENTRY	*remove_history(int);
+/*###152 [lint] syntax error 'histdata_t' [249]%%%*/
+HIST_ENTRY	*replace_history_entry(int, const char *, histdata_t);
+int		 history_total_bytes(void);
+int		 history_set_pos(int);
+HIST_ENTRY	*previous_history(void);
+HIST_ENTRY	*next_history(void);
+int		 history_search(const char *, int);
+int		 history_search_prefix(const char *, int);
+int		 history_search_pos(const char *, int, int);
+int		 read_history(const char *);
+int		 write_history(const char *);
+int		 history_truncate_file (const char *, int);
+int		 history_expand(char *, char **);
+char	       **history_tokenize(const char *);
+const char	*get_history_event(const char *, int *, int);
+char		*history_arg_extract(int, int, const char *);
+
+char		*tilde_expand(char *);
+char		*filename_completion_function(const char *, int);
+char		*username_completion_function(const char *, int);
+int		 rl_complete(int, int);
+int		 rl_read_key(void);
+char	       **completion_matches(const char *, CPFunction *);
+void		 rl_display_match_list(char **, int, int);
+
+int		 rl_insert(int, int);
+int		 rl_insert_text(const char *);
+void		 rl_reset_terminal(const char *);
+int		 rl_bind_key(int, rl_command_func_t *);
+int		 rl_newline(int, int);
+void		 rl_callback_read_char(void);
+void		 rl_callback_handler_install(const char *, VCPFunction *);
+void		 rl_callback_handler_remove(void);
+void		 rl_redisplay(void);
+int		 rl_get_previous_history(int, int);
+void		 rl_prep_terminal(int);
+void		 rl_deprep_terminal(void);
+int		 rl_read_init_file(const char *);
+int		 rl_parse_and_bind(const char *);
+int		 rl_variable_bind(const char *, const char *);
+void		 rl_stuff_char(int);
+int		 rl_add_defun(const char *, Function *, int);
+HISTORY_STATE	*history_get_history_state(void);
+void		 rl_get_screen_size(int *, int *);
+void		 rl_set_screen_size(int, int);
+char 		*rl_filename_completion_function (const char *, int);
+int		 _rl_abort_internal(void);
+int		 _rl_qsort_string_compare(char **, char **);
+char 	       **rl_completion_matches(const char *, rl_compentry_func_t *);
+void		 rl_forced_update_display(void);
+int		 rl_set_prompt(const char *);
+int		 rl_on_new_line(void);
+
+/*
+ * The following are not implemented
+ */
+int		 rl_kill_text(int, int);
+Keymap		 rl_get_keymap(void);
+void		 rl_set_keymap(Keymap);
+Keymap		 rl_make_bare_keymap(void);
+int		 rl_generic_bind(int, const char *, const char *, Keymap);
+int		 rl_bind_key_in_map(int, rl_command_func_t *, Keymap);
+void		 rl_cleanup_after_signal(void);
+void		 rl_free_line_state(void);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _READLINE_H_ */
diff --git a/lib/libedit/histedit.h b/lib/libedit/histedit.h
new file mode 100644
index 0000000..f245748
--- /dev/null
+++ b/lib/libedit/histedit.h
@@ -0,0 +1,242 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Christos Zoulas of Cornell University.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)histedit.h	8.2 (Berkeley) 1/3/94
+ *	$NetBSD: histedit.h,v 1.32 2007/06/10 20:20:28 christos Exp $
+ * $FreeBSD$
+ */
+
+/*
+ * histedit.h: Line editor and history interface.
+ */
+#ifndef _HISTEDIT_H_
+#define	_HISTEDIT_H_
+
+#include <sys/types.h>
+#include <stdio.h>
+
+__BEGIN_DECLS
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * ==== Editing ====
+ */
+
+typedef struct editline EditLine;
+
+/*
+ * For user-defined function interface
+ */
+typedef struct lineinfo {
+	const char	*buffer;
+	const char	*cursor;
+	const char	*lastchar;
+} LineInfo;
+
+/*
+ * EditLine editor function return codes.
+ * For user-defined function interface
+ */
+#define	CC_NORM		0
+#define	CC_NEWLINE	1
+#define	CC_EOF		2
+#define	CC_ARGHACK	3
+#define	CC_REFRESH	4
+#define	CC_CURSOR	5
+#define	CC_ERROR	6
+#define	CC_FATAL	7
+#define	CC_REDISPLAY	8
+#define	CC_REFRESH_BEEP	9
+
+/*
+ * Initialization, cleanup, and resetting
+ */
+EditLine	*el_init(const char *, FILE *, FILE *, FILE *);
+void		 el_end(EditLine *);
+void		 el_reset(EditLine *);
+
+/*
+ * Get a line, a character or push a string back in the input queue
+ */
+const char	*el_gets(EditLine *, int *);
+int		 el_getc(EditLine *, char *);
+void		 el_push(EditLine *, const char *);
+
+/*
+ * Beep!
+ */
+void		 el_beep(EditLine *);
+
+/*
+ * High level function internals control
+ * Parses argc, argv array and executes builtin editline commands
+ */
+int		 el_parse(EditLine *, int, const char **);
+
+/*
+ * Low level editline access functions
+ */
+int		 el_set(EditLine *, int, ...);
+int		 el_get(EditLine *, int, ...);
+unsigned char	_el_fn_complete(EditLine *, int);
+unsigned char	_el_fn_sh_complete(EditLine *, int);
+
+/*
+ * el_set/el_get parameters
+ */
+#define	EL_PROMPT	0	/* , el_pfunc_t);		*/
+#define	EL_TERMINAL	1	/* , const char *);		*/
+#define	EL_EDITOR	2	/* , const char *);		*/
+#define	EL_SIGNAL	3	/* , int);			*/
+#define	EL_BIND		4	/* , const char *, ..., NULL);	*/
+#define	EL_TELLTC	5	/* , const char *, ..., NULL);	*/
+#define	EL_SETTC	6	/* , const char *, ..., NULL);	*/
+#define	EL_ECHOTC	7	/* , const char *, ..., NULL);	*/
+#define	EL_SETTY	8	/* , const char *, ..., NULL);	*/
+#define	EL_ADDFN	9	/* , const char *, const char *	*/
+				/* , el_func_t);		*/
+#define	EL_HIST		10	/* , hist_fun_t, const char *);	*/
+#define	EL_EDITMODE	11	/* , int);			*/
+#define	EL_RPROMPT	12	/* , el_pfunc_t);		*/
+#define	EL_GETCFN	13	/* , el_rfunc_t);		*/
+#define	EL_CLIENTDATA	14	/* , void *);			*/
+#define	EL_UNBUFFERED	15	/* , int);			*/
+#define	EL_PREP_TERM    16      /* , int);                      */
+#define	EL_GETTC	17	/* , const char *, ..., NULL);	*/
+#define	EL_GETFP	18	/* , int, FILE **)		*/
+#define	EL_SETFP	19	/* , int, FILE *)		*/
+#define	EL_REFRESH	20	/* , void);			      set     */
+#define	EL_PROMPT_ESC	21	/* , prompt_func, Char);	      set/get */
+#define	EL_RPROMPT_ESC	22	/* , prompt_func, Char);	      set/get */
+#define	EL_RESIZE	23	/* , el_zfunc_t, void *);	      set     */
+
+#define	EL_BUILTIN_GETCFN	(NULL)
+
+/*
+ * Source named file or $PWD/.editrc or $HOME/.editrc
+ */
+int		el_source(EditLine *, const char *);
+
+/*
+ * Must be called when the terminal changes size; If EL_SIGNAL
+ * is set this is done automatically otherwise it is the responsibility
+ * of the application
+ */
+void		 el_resize(EditLine *);
+
+
+/*
+ * Set user private data.
+ */
+void            el_data_set    __P((EditLine *, void *));
+void *          el_data_get    __P((EditLine *));
+
+/*
+ * User-defined function interface.
+ */
+const LineInfo	*el_line(EditLine *);
+int		 el_insertstr(EditLine *, const char *);
+void		 el_deletestr(EditLine *, int);
+
+
+/*
+ * ==== History ====
+ */
+
+typedef struct history History;
+
+typedef struct HistEvent {
+	int		 num;
+	const char	*str;
+} HistEvent;
+
+/*
+ * History access functions.
+ */
+History *	history_init(void);
+void		history_end(History *);
+
+int		history(History *, HistEvent *, int, ...);
+
+#define	H_FUNC		 0	/* , UTSL		*/
+#define	H_SETSIZE	 1	/* , const int);	*/
+#define	H_EVENT		 1	/* , const int);	*/
+#define	H_GETSIZE	 2	/* , void);		*/
+#define	H_FIRST		 3	/* , void);		*/
+#define	H_LAST		 4	/* , void);		*/
+#define	H_PREV		 5	/* , void);		*/
+#define	H_NEXT		 6	/* , void);		*/
+#define	H_CURR		 8	/* , const int);	*/
+#define	H_SET		 7	/* , int);		*/
+#define	H_ADD		 9	/* , const char *);	*/
+#define	H_ENTER		10	/* , const char *);	*/
+#define	H_APPEND	11	/* , const char *);	*/
+#define	H_END		12	/* , void);		*/
+#define	H_NEXT_STR	13	/* , const char *);	*/
+#define	H_PREV_STR	14	/* , const char *);	*/
+#define	H_NEXT_EVENT	15	/* , const int);	*/
+#define	H_PREV_EVENT	16	/* , const int);	*/
+#define	H_LOAD		17	/* , const char *);	*/
+#define	H_SAVE		18	/* , const char *);	*/
+#define	H_CLEAR		19	/* , void);		*/
+#define	H_SETUNIQUE	20	/* , int);		*/
+#define	H_GETUNIQUE	21	/* , void);		*/
+#define	H_DEL		22	/* , int);		*/
+#define	H_NEXT_EVDATA	23	/* , const int, histdata_t *);	*/
+#define	H_DELDATA	24	/* , int, histdata_t *);*/
+#define	H_REPLACE	25	/* , const char *, histdata_t);	*/
+
+
+/*
+ * ==== Tokenization ====
+ */
+
+typedef struct tokenizer Tokenizer;
+
+/*
+ * String tokenization functions, using simplified sh(1) quoting rules
+ */
+Tokenizer	*tok_init(const char *);
+void		 tok_end(Tokenizer *);
+void		 tok_reset(Tokenizer *);
+int		 tok_line(Tokenizer *, const LineInfo *,
+		    int *, const char ***, int *, int *);
+int		 tok_str(Tokenizer *, const char *,
+		    int *, const char ***);
+
+__END_DECLS
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _HISTEDIT_H_ */
diff --git a/lib/libedit/read.c b/lib/libedit/read.c
index f774217..0caba5d 100644
--- a/lib/libedit/read.c
+++ b/lib/libedit/read.c
@@ -211,7 +211,7 @@ read_preread(EditLine *el)
  *	Push a macro
  */
 public void
-el_push(EditLine *el, char *str)
+el_push(EditLine *el, const char *str)
 {
 	c_macro_t *ma = &el->el_chared.c_macro;
 
diff --git a/lib/libedit/readline.c b/lib/libedit/readline.c
new file mode 100644
index 0000000..35054fa
--- /dev/null
+++ b/lib/libedit/readline.c
@@ -0,0 +1,2239 @@
+/*	$NetBSD: readline.c,v 1.90 2010/08/04 20:29:18 christos Exp $	*/
+
+/*-
+ * Copyright (c) 1997 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jaromir Dolecek.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: readline.c,v 1.90 2010/08/04 20:29:18 christos Exp $");
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <dirent.h>
+#include <string.h>
+#include <pwd.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <setjmp.h>
+#include <vis.h>
+#include "sys.h"
+#include "readline/readline.h"
+#include "chartype.h"
+#include "el.h"
+#include "fcns.h"		/* for EL_NUM_FCNS */
+#include "histedit.h"
+#include "filecomplete.h"
+
+void rl_prep_terminal(int);
+void rl_deprep_terminal(void);
+
+/* for rl_complete() */
+#define TAB		'\r'
+
+/* see comment at the #ifdef for sense of this */
+/* #define GDB_411_HACK */
+
+/* readline compatibility stuff - look at readline sources/documentation */
+/* to see what these variables mean */
+const char *rl_library_version = "EditLine wrapper";
+int rl_readline_version = RL_READLINE_VERSION;
+static char empty[] = { '\0' };
+static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
+static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
+    '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
+char *rl_readline_name = empty;
+FILE *rl_instream = NULL;
+FILE *rl_outstream = NULL;
+int rl_point = 0;
+int rl_end = 0;
+char *rl_line_buffer = NULL;
+VCPFunction *rl_linefunc = NULL;
+int rl_done = 0;
+VFunction *rl_event_hook = NULL;
+KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
+    emacs_meta_keymap,
+    emacs_ctlx_keymap;
+
+int history_base = 1;		/* probably never subject to change */
+int history_length = 0;
+int max_input_history = 0;
+char history_expansion_char = '!';
+char history_subst_char = '^';
+char *history_no_expand_chars = expand_chars;
+Function *history_inhibit_expansion_function = NULL;
+char *history_arg_extract(int start, int end, const char *str);
+
+int rl_inhibit_completion = 0;
+int rl_attempted_completion_over = 0;
+char *rl_basic_word_break_characters = break_chars;
+char *rl_completer_word_break_characters = NULL;
+char *rl_completer_quote_characters = NULL;
+Function *rl_completion_entry_function = NULL;
+CPPFunction *rl_attempted_completion_function = NULL;
+Function *rl_pre_input_hook = NULL;
+Function *rl_startup1_hook = NULL;
+int (*rl_getc_function)(FILE *) = NULL;
+char *rl_terminal_name = NULL;
+int rl_already_prompted = 0;
+int rl_filename_completion_desired = 0;
+int rl_ignore_completion_duplicates = 0;
+int rl_catch_signals = 1;
+int readline_echoing_p = 1;
+int _rl_print_completions_horizontally = 0;
+VFunction *rl_redisplay_function = NULL;
+Function *rl_startup_hook = NULL;
+VFunction *rl_completion_display_matches_hook = NULL;
+VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
+VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
+KEYMAP_ENTRY_ARRAY emacs_meta_keymap;
+
+#ifdef WIDECHAR
+static ct_buffer_t conv;
+#endif
+
+/*
+ * The current prompt string.
+ */
+char *rl_prompt = NULL;
+/*
+ * This is set to character indicating type of completion being done by
+ * rl_complete_internal(); this is available for application completion
+ * functions.
+ */
+int rl_completion_type = 0;
+
+/*
+ * If more than this number of items results from query for possible
+ * completions, we ask user if they are sure to really display the list.
+ */
+int rl_completion_query_items = 100;
+
+/*
+ * List of characters which are word break characters, but should be left
+ * in the parsed text when it is passed to the completion function.
+ * Shell uses this to help determine what kind of completing to do.
+ */
+char *rl_special_prefixes = NULL;
+
+/*
+ * This is the character appended to the completed words if at the end of
+ * the line. Default is ' ' (a space).
+ */
+int rl_completion_append_character = ' ';
+
+/* stuff below is used internally by libedit for readline emulation */
+
+static TYPE(History) *h = NULL;
+static EditLine *e = NULL;
+static Function *map[256];
+static jmp_buf topbuf;
+
+/* internal functions */
+static unsigned char	 _el_rl_complete(EditLine *, int);
+static unsigned char	 _el_rl_tstp(EditLine *, int);
+static char		*_get_prompt(EditLine *);
+static int		 _getc_function(EditLine *, char *);
+static HIST_ENTRY	*_move_history(int);
+static int		 _history_expand_command(const char *, size_t, size_t,
+    char **);
+static char		*_rl_compat_sub(const char *, const char *,
+    const char *, int);
+static int		 _rl_event_read_char(EditLine *, char *);
+static void		 _rl_update_pos(void);
+
+
+/* ARGSUSED */
+static char *
+_get_prompt(EditLine *el __attribute__((__unused__)))
+{
+	rl_already_prompted = 1;
+	return (rl_prompt);
+}
+
+
+/*
+ * generic function for moving around history
+ */
+static HIST_ENTRY *
+_move_history(int op)
+{
+	TYPE(HistEvent) ev;
+	static HIST_ENTRY rl_he;
+
+	if (FUNW(history)(h, &ev, op) != 0)
+		return (HIST_ENTRY *) NULL;
+
+	rl_he.line = ct_encode_string(ev.str, &conv);
+	rl_he.data = NULL;
+
+	return (&rl_he);
+}
+
+
+/*
+ * read one key from user defined input function
+ */
+static int
+/*ARGSUSED*/
+_getc_function(EditLine *el, char *c)
+{
+	int i;
+
+	i = (*rl_getc_function)(NULL);
+	if (i == -1)
+		return 0;
+	*c = i;
+	return 1;
+}
+
+static const char _dothistory[] = "/.history";
+
+static const char *
+_default_history_file(void)
+{
+	struct passwd *p;
+	static char path[PATH_MAX];
+
+	if (*path)
+		return path;
+	if ((p = getpwuid(getuid())) == NULL)
+		return NULL;
+	strlcpy(path, p->pw_dir, PATH_MAX);
+	strlcat(path, _dothistory, PATH_MAX);
+	return path;
+}
+
+/*
+ * READLINE compatibility stuff
+ */
+
+/*
+ * Set the prompt
+ */
+int
+rl_set_prompt(const char *prompt)
+{
+	char *p;
+
+	if (!prompt)
+		prompt = "";
+	if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) 
+		return 0;
+	if (rl_prompt)
+		free(rl_prompt);
+	rl_prompt = strdup(prompt);
+	if (rl_prompt == NULL)
+		return -1;
+
+	while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL)
+		*p = RL_PROMPT_START_IGNORE;
+
+	return 0;
+}
+
+/*
+ * initialize rl compat stuff
+ */
+int
+rl_initialize(void)
+{
+	TYPE(HistEvent) ev;
+	const LineInfo *li;
+	int editmode = 1;
+	struct termios t;
+
+	if (e != NULL)
+		el_end(e);
+	if (h != NULL)
+		FUN(history,end)(h);
+
+	if (!rl_instream)
+		rl_instream = stdin;
+	if (!rl_outstream)
+		rl_outstream = stdout;
+
+	/*
+	 * See if we don't really want to run the editor
+	 */
+	if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
+		editmode = 0;
+
+	e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
+
+	if (!editmode)
+		FUN(el,set)(e, EL_EDITMODE, 0);
+
+	h = FUN(history,init)();
+	if (!e || !h)
+		return (-1);
+
+	FUNW(history)(h, &ev, H_SETSIZE, INT_MAX);	/* unlimited */
+	history_length = 0;
+	max_input_history = INT_MAX;
+	el_set(e, EL_HIST, history, h);
+
+	/* setup getc function if valid */
+	if (rl_getc_function)
+		el_set(e, EL_GETCFN, _getc_function);
+
+	/* for proper prompt printing in readline() */
+	if (rl_set_prompt("") == -1) {
+		FUN(history,end)(h);
+		el_end(e);
+		return -1;
+	}
+	el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE);
+	el_set(e, EL_SIGNAL, rl_catch_signals);
+
+	/* set default mode to "emacs"-style and read setting afterwards */
+	/* so this can be overriden */
+	el_set(e, EL_EDITOR, "emacs");
+	if (rl_terminal_name != NULL)
+		el_set(e, EL_TERMINAL, rl_terminal_name);
+	else
+		el_get(e, EL_TERMINAL, &rl_terminal_name);
+
+	/*
+	 * Word completion - this has to go AFTER rebinding keys
+	 * to emacs-style.
+	 */
+	el_set(e, EL_ADDFN, "rl_complete",
+	    "ReadLine compatible completion function",
+	    _el_rl_complete);
+	el_set(e, EL_BIND, "^I", "rl_complete", NULL);
+
+	/*
+	 * Send TSTP when ^Z is pressed.
+	 */
+	el_set(e, EL_ADDFN, "rl_tstp",
+	    "ReadLine compatible suspend function",
+	    _el_rl_tstp);
+	el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
+		
+	/* read settings from configuration file */
+	el_source(e, NULL);
+
+	/*
+	 * Unfortunately, some applications really do use rl_point
+	 * and rl_line_buffer directly.
+	 */
+	li = el_line(e);
+	/* a cheesy way to get rid of const cast. */
+	rl_line_buffer = memchr(li->buffer, *li->buffer, 1);
+	_rl_update_pos();
+
+	if (rl_startup_hook)
+		(*rl_startup_hook)(NULL, 0);
+
+	return (0);
+}
+
+
+/*
+ * read one line from input stream and return it, chomping
+ * trailing newline (if there is any)
+ */
+char *
+readline(const char *p)
+{
+	TYPE(HistEvent) ev;
+	const char * volatile prompt = p;
+	int count;
+	const char *ret;
+	char *buf;
+	static int used_event_hook;
+
+	if (e == NULL || h == NULL)
+		rl_initialize();
+
+	rl_done = 0;
+
+	(void)setjmp(topbuf);
+
+	/* update prompt accordingly to what has been passed */
+	if (rl_set_prompt(prompt) == -1)
+		return NULL;
+
+	if (rl_pre_input_hook)
+		(*rl_pre_input_hook)(NULL, 0);
+
+	if (rl_event_hook && !(e->el_flags&NO_TTY)) {
+		el_set(e, EL_GETCFN, _rl_event_read_char);
+		used_event_hook = 1;
+	}
+
+	if (!rl_event_hook && used_event_hook) {
+		el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
+		used_event_hook = 0;
+	}
+
+	rl_already_prompted = 0;
+
+	/* get one line from input stream */
+	ret = el_gets(e, &count);
+
+	if (ret && count > 0) {
+		int lastidx;
+
+		buf = strdup(ret);
+		if (buf == NULL)
+			return NULL;
+		lastidx = count - 1;
+		if (buf[lastidx] == '\n')
+			buf[lastidx] = '\0';
+	} else
+		buf = NULL;
+
+	FUNW(history)(h, &ev, H_GETSIZE);
+	history_length = ev.num;
+
+	return buf;
+}
+
+/*
+ * history functions
+ */
+
+/*
+ * is normally called before application starts to use
+ * history expansion functions
+ */
+void
+using_history(void)
+{
+	if (h == NULL || e == NULL)
+		rl_initialize();
+}
+
+
+/*
+ * substitute ``what'' with ``with'', returning resulting string; if
+ * globally == 1, substitutes all occurrences of what, otherwise only the
+ * first one
+ */
+static char *
+_rl_compat_sub(const char *str, const char *what, const char *with,
+    int globally)
+{
+	const	char	*s;
+	char	*r, *result;
+	size_t	len, with_len, what_len;
+
+	len = strlen(str);
+	with_len = strlen(with);
+	what_len = strlen(what);
+
+	/* calculate length we need for result */
+	s = str;
+	while (*s) {
+		if (*s == *what && !strncmp(s, what, what_len)) {
+			len += with_len - what_len;
+			if (!globally)
+				break;
+			s += what_len;
+		} else
+			s++;
+	}
+	r = result = malloc(len + 1);
+	if (result == NULL)
+		return NULL;
+	s = str;
+	while (*s) {
+		if (*s == *what && !strncmp(s, what, what_len)) {
+			(void)strncpy(r, with, with_len);
+			r += with_len;
+			s += what_len;
+			if (!globally) {
+				(void)strcpy(r, s);
+				return(result);
+			}
+		} else
+			*r++ = *s++;
+	}
+	*r = '\0';
+	return(result);
+}
+
+static	char	*last_search_pat;	/* last !?pat[?] search pattern */
+static	char	*last_search_match;	/* last !?pat[?] that matched */
+
+const char *
+get_history_event(const char *cmd, int *cindex, int qchar)
+{
+	int idx, sign, sub, num, begin, ret;
+	size_t len;
+	char	*pat;
+	const char *rptr;
+	TYPE(HistEvent) ev;
+
+	idx = *cindex;
+	if (cmd[idx++] != history_expansion_char)
+		return(NULL);
+
+	/* find out which event to take */
+	if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') {
+		if (FUNW(history)(h, &ev, H_FIRST) != 0)
+			return(NULL);
+		*cindex = cmd[idx]? (idx + 1):idx;
+		return ct_encode_string(ev.str, &conv);
+	}
+	sign = 0;
+	if (cmd[idx] == '-') {
+		sign = 1;
+		idx++;
+	}
+
+	if ('0' <= cmd[idx] && cmd[idx] <= '9') {
+		HIST_ENTRY *rl_he;
+
+		num = 0;
+		while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
+			num = num * 10 + cmd[idx] - '0';
+			idx++;
+		}
+		if (sign)
+			num = history_length - num + 1;
+
+		if (!(rl_he = history_get(num)))
+			return(NULL);
+
+		*cindex = idx;
+		return(rl_he->line);
+	}
+	sub = 0;
+	if (cmd[idx] == '?') {
+		sub = 1;
+		idx++;
+	}
+	begin = idx;
+	while (cmd[idx]) {
+		if (cmd[idx] == '\n')
+			break;
+		if (sub && cmd[idx] == '?')
+			break;
+		if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
+				    || cmd[idx] == '\t' || cmd[idx] == qchar))
+			break;
+		idx++;
+	}
+	len = idx - begin;
+	if (sub && cmd[idx] == '?')
+		idx++;
+	if (sub && len == 0 && last_search_pat && *last_search_pat)
+		pat = last_search_pat;
+	else if (len == 0)
+		return(NULL);
+	else {
+		if ((pat = malloc(len + 1)) == NULL)
+			return NULL;
+		(void)strncpy(pat, cmd + begin, len);
+		pat[len] = '\0';
+	}
+
+	if (FUNW(history)(h, &ev, H_CURR) != 0) {
+		if (pat != last_search_pat)
+			free(pat);
+		return (NULL);
+	}
+	num = ev.num;
+
+	if (sub) {
+		if (pat != last_search_pat) {
+			if (last_search_pat)
+				free(last_search_pat);
+			last_search_pat = pat;
+		}
+		ret = history_search(pat, -1);
+	} else
+		ret = history_search_prefix(pat, -1);
+
+	if (ret == -1) {
+		/* restore to end of list on failed search */
+		FUNW(history)(h, &ev, H_FIRST);
+		(void)fprintf(rl_outstream, "%s: Event not found\n", pat);
+		if (pat != last_search_pat)
+			free(pat);
+		return(NULL);
+	}
+
+	if (sub && len) {
+		if (last_search_match && last_search_match != pat)
+			free(last_search_match);
+		last_search_match = pat;
+	}
+
+	if (pat != last_search_pat)
+		free(pat);
+
+	if (FUNW(history)(h, &ev, H_CURR) != 0)
+		return(NULL);
+	*cindex = idx;
+	rptr = ct_encode_string(ev.str, &conv);
+
+	/* roll back to original position */
+	(void)FUNW(history)(h, &ev, H_SET, num);
+
+	return rptr;
+}
+
+/*
+ * the real function doing history expansion - takes as argument command
+ * to do and data upon which the command should be executed
+ * does expansion the way I've understood readline documentation
+ *
+ * returns 0 if data was not modified, 1 if it was and 2 if the string
+ * should be only printed and not executed; in case of error,
+ * returns -1 and *result points to NULL
+ * it's callers responsibility to free() string returned in *result
+ */
+static int
+_history_expand_command(const char *command, size_t offs, size_t cmdlen,
+    char **result)
+{
+	char *tmp, *search = NULL, *aptr;
+	const char *ptr, *cmd;
+	static char *from = NULL, *to = NULL;
+	int start, end, idx, has_mods = 0;
+	int p_on = 0, g_on = 0;
+
+	*result = NULL;
+	aptr = NULL;
+	ptr = NULL;
+
+	/* First get event specifier */
+	idx = 0;
+
+	if (strchr(":^*$", command[offs + 1])) {
+		char str[4];
+		/*
+		* "!:" is shorthand for "!!:".
+		* "!^", "!*" and "!$" are shorthand for
+		* "!!:^", "!!:*" and "!!:$" respectively.
+		*/
+		str[0] = str[1] = '!';
+		str[2] = '0';
+		ptr = get_history_event(str, &idx, 0);
+		idx = (command[offs + 1] == ':')? 1:0;
+		has_mods = 1;
+	} else {
+		if (command[offs + 1] == '#') {
+			/* use command so far */
+			if ((aptr = malloc(offs + 1)) == NULL)
+				return -1;
+			(void)strncpy(aptr, command, offs);
+			aptr[offs] = '\0';
+			idx = 1;
+		} else {
+			int	qchar;
+
+			qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
+			ptr = get_history_event(command + offs, &idx, qchar);
+		}
+		has_mods = command[offs + idx] == ':';
+	}
+
+	if (ptr == NULL && aptr == NULL)
+		return(-1);
+
+	if (!has_mods) {
+		*result = strdup(aptr ? aptr : ptr);
+		if (aptr)
+			free(aptr);
+		if (*result == NULL)
+			return -1;
+		return(1);
+	}
+
+	cmd = command + offs + idx + 1;
+
+	/* Now parse any word designators */
+
+	if (*cmd == '%')	/* last word matched by ?pat? */
+		tmp = strdup(last_search_match? last_search_match:"");
+	else if (strchr("^*$-0123456789", *cmd)) {
+		start = end = -1;
+		if (*cmd == '^')
+			start = end = 1, cmd++;
+		else if (*cmd == '$')
+			start = -1, cmd++;
+		else if (*cmd == '*')
+			start = 1, cmd++;
+	       else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
+			start = 0;
+			while (*cmd && '0' <= *cmd && *cmd <= '9')
+				start = start * 10 + *cmd++ - '0';
+
+			if (*cmd == '-') {
+				if (isdigit((unsigned char) cmd[1])) {
+					cmd++;
+					end = 0;
+					while (*cmd && '0' <= *cmd && *cmd <= '9')
+						end = end * 10 + *cmd++ - '0';
+				} else if (cmd[1] == '$') {
+					cmd += 2;
+					end = -1;
+				} else {
+					cmd++;
+					end = -2;
+				}
+			} else if (*cmd == '*')
+				end = -1, cmd++;
+			else
+				end = start;
+		}
+		tmp = history_arg_extract(start, end, aptr? aptr:ptr);
+		if (tmp == NULL) {
+			(void)fprintf(rl_outstream, "%s: Bad word specifier",
+			    command + offs + idx);
+			if (aptr)
+				free(aptr);
+			return(-1);
+		}
+	} else
+		tmp = strdup(aptr? aptr:ptr);
+
+	if (aptr)
+		free(aptr);
+
+	if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) {
+		*result = tmp;
+		return(1);
+	}
+
+	for (; *cmd; cmd++) {
+		if (*cmd == ':')
+			continue;
+		else if (*cmd == 'h') {		/* remove trailing path */
+			if ((aptr = strrchr(tmp, '/')) != NULL)
+				*aptr = '\0';
+		} else if (*cmd == 't') {	/* remove leading path */
+			if ((aptr = strrchr(tmp, '/')) != NULL) {
+				aptr = strdup(aptr + 1);
+				free(tmp);
+				tmp = aptr;
+			}
+		} else if (*cmd == 'r') {	/* remove trailing suffix */
+			if ((aptr = strrchr(tmp, '.')) != NULL)
+				*aptr = '\0';
+		} else if (*cmd == 'e') {	/* remove all but suffix */
+			if ((aptr = strrchr(tmp, '.')) != NULL) {
+				aptr = strdup(aptr);
+				free(tmp);
+				tmp = aptr;
+			}
+		} else if (*cmd == 'p')		/* print only */
+			p_on = 1;
+		else if (*cmd == 'g')
+			g_on = 2;
+		else if (*cmd == 's' || *cmd == '&') {
+			char *what, *with, delim;
+			size_t len, from_len;
+			size_t size;
+
+			if (*cmd == '&' && (from == NULL || to == NULL))
+				continue;
+			else if (*cmd == 's') {
+				delim = *(++cmd), cmd++;
+				size = 16;
+				what = realloc(from, size);
+				if (what == NULL) {
+					free(from);
+					free(tmp);
+					return 0;
+				}
+				len = 0;
+				for (; *cmd && *cmd != delim; cmd++) {
+					if (*cmd == '\\' && cmd[1] == delim)
+						cmd++;
+					if (len >= size) {
+						char *nwhat;
+						nwhat = realloc(what,
+								(size <<= 1));
+						if (nwhat == NULL) {
+							free(what);
+							free(tmp);
+							return 0;
+						}
+						what = nwhat;
+					}
+					what[len++] = *cmd;
+				}
+				what[len] = '\0';
+				from = what;
+				if (*what == '\0') {
+					free(what);
+					if (search) {
+						from = strdup(search);
+						if (from == NULL) {
+							free(tmp);
+							return 0;
+						}
+					} else {
+						from = NULL;
+						free(tmp);
+						return (-1);
+					}
+				}
+				cmd++;	/* shift after delim */
+				if (!*cmd)
+					continue;
+
+				size = 16;
+				with = realloc(to, size);
+				if (with == NULL) {
+					free(to);
+					free(tmp);
+					return -1;
+				}
+				len = 0;
+				from_len = strlen(from);
+				for (; *cmd && *cmd != delim; cmd++) {
+					if (len + from_len + 1 >= size) {
+						char *nwith;
+						size += from_len + 1;
+						nwith = realloc(with, size);
+						if (nwith == NULL) {
+							free(with);
+							free(tmp);
+							return -1;
+						}
+						with = nwith;
+					}
+					if (*cmd == '&') {
+						/* safe */
+						(void)strcpy(&with[len], from);
+						len += from_len;
+						continue;
+					}
+					if (*cmd == '\\'
+					    && (*(cmd + 1) == delim
+						|| *(cmd + 1) == '&'))
+						cmd++;
+					with[len++] = *cmd;
+				}
+				with[len] = '\0';
+				to = with;
+			}
+
+			aptr = _rl_compat_sub(tmp, from, to, g_on);
+			if (aptr) {
+				free(tmp);
+				tmp = aptr;
+			}
+			g_on = 0;
+		}
+	}
+	*result = tmp;
+	return (p_on? 2:1);
+}
+
+
+/*
+ * csh-style history expansion
+ */
+int
+history_expand(char *str, char **output)
+{
+	int ret = 0;
+	size_t idx, i, size;
+	char *tmp, *result;
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+
+	if (history_expansion_char == 0) {
+		*output = strdup(str);
+		return(0);
+	}
+
+	*output = NULL;
+	if (str[0] == history_subst_char) {
+		/* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
+		*output = malloc(strlen(str) + 4 + 1);
+		if (*output == NULL)
+			return 0;
+		(*output)[0] = (*output)[1] = history_expansion_char;
+		(*output)[2] = ':';
+		(*output)[3] = 's';
+		(void)strcpy((*output) + 4, str);
+		str = *output;
+	} else {
+		*output = strdup(str);
+		if (*output == NULL)
+			return 0;
+	}
+
+#define ADD_STRING(what, len, fr)					\
+	{								\
+		if (idx + len + 1 > size) {				\
+			char *nresult = realloc(result, (size += len + 1));\
+			if (nresult == NULL) {				\
+				free(*output);				\
+				if (/*CONSTCOND*/fr)			\
+					free(tmp);			\
+				return 0;				\
+			}						\
+			result = nresult;				\
+		}							\
+		(void)strncpy(&result[idx], what, len);			\
+		idx += len;						\
+		result[idx] = '\0';					\
+	}
+
+	result = NULL;
+	size = idx = 0;
+	tmp = NULL;
+	for (i = 0; str[i];) {
+		int qchar, loop_again;
+		size_t len, start, j;
+
+		qchar = 0;
+		loop_again = 1;
+		start = j = i;
+loop:
+		for (; str[j]; j++) {
+			if (str[j] == '\\' &&
+			    str[j + 1] == history_expansion_char) {
+				(void)strcpy(&str[j], &str[j + 1]);
+				continue;
+			}
+			if (!loop_again) {
+				if (isspace((unsigned char) str[j])
+				    || str[j] == qchar)
+					break;
+			}
+			if (str[j] == history_expansion_char
+			    && !strchr(history_no_expand_chars, str[j + 1])
+			    && (!history_inhibit_expansion_function ||
+			    (*history_inhibit_expansion_function)(str,
+			    (int)j) == 0))
+				break;
+		}
+
+		if (str[j] && loop_again) {
+			i = j;
+			qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
+			j++;
+			if (str[j] == history_expansion_char)
+				j++;
+			loop_again = 0;
+			goto loop;
+		}
+		len = i - start;
+		ADD_STRING(&str[start], len, 0);
+
+		if (str[i] == '\0' || str[i] != history_expansion_char) {
+			len = j - i;
+			ADD_STRING(&str[i], len, 0);
+			if (start == 0)
+				ret = 0;
+			else
+				ret = 1;
+			break;
+		}
+		ret = _history_expand_command (str, i, (j - i), &tmp);
+		if (ret > 0 && tmp) {
+			len = strlen(tmp);
+			ADD_STRING(tmp, len, 1);
+		}
+		if (tmp) {
+			free(tmp);
+			tmp = NULL;
+		}
+		i = j;
+	}
+
+	/* ret is 2 for "print only" option */
+	if (ret == 2) {
+		add_history(result);
+#ifdef GDB_411_HACK
+		/* gdb 4.11 has been shipped with readline, where */
+		/* history_expand() returned -1 when the line	  */
+		/* should not be executed; in readline 2.1+	  */
+		/* it should return 2 in such a case		  */
+		ret = -1;
+#endif
+	}
+	free(*output);
+	*output = result;
+
+	return (ret);
+}
+
+/*
+* Return a string consisting of arguments of "str" from "start" to "end".
+*/
+char *
+history_arg_extract(int start, int end, const char *str)
+{
+	size_t  i, len, max;
+	char	**arr, *result = NULL;
+
+	arr = history_tokenize(str);
+	if (!arr)
+		return NULL;
+	if (arr && *arr == NULL)
+		goto out;
+
+	for (max = 0; arr[max]; max++)
+		continue;
+	max--;
+
+	if (start == '$')
+		start = (int)max;
+	if (end == '$')
+		end = (int)max;
+	if (end < 0)
+		end = (int)max + end + 1;
+	if (start < 0)
+		start = end;
+
+	if (start < 0 || end < 0 || (size_t)start > max ||
+	    (size_t)end > max || start > end)
+		goto out;
+
+	for (i = start, len = 0; i <= (size_t)end; i++)
+		len += strlen(arr[i]) + 1;
+	len++;
+	result = malloc(len);
+	if (result == NULL)
+		goto out;
+
+	for (i = start, len = 0; i <= (size_t)end; i++) {
+		(void)strcpy(result + len, arr[i]);
+		len += strlen(arr[i]);
+		if (i < (size_t)end)
+			result[len++] = ' ';
+	}
+	result[len] = '\0';
+
+out:
+	for (i = 0; arr[i]; i++)
+		free(arr[i]);
+	free(arr);
+
+	return result;
+}
+
+/*
+ * Parse the string into individual tokens,
+ * similar to how shell would do it.
+ */
+char **
+history_tokenize(const char *str)
+{
+	int size = 1, idx = 0, i, start;
+	size_t len;
+	char **result = NULL, *temp, delim = '\0';
+
+	for (i = 0; str[i];) {
+		while (isspace((unsigned char) str[i]))
+			i++;
+		start = i;
+		for (; str[i];) {
+			if (str[i] == '\\') {
+				if (str[i+1] != '\0')
+					i++;
+			} else if (str[i] == delim)
+				delim = '\0';
+			else if (!delim &&
+				    (isspace((unsigned char) str[i]) ||
+				strchr("()<>;&|$", str[i])))
+				break;
+			else if (!delim && strchr("'`\"", str[i]))
+				delim = str[i];
+			if (str[i])
+				i++;
+		}
+
+		if (idx + 2 >= size) {
+			char **nresult;
+			size <<= 1;
+			nresult = realloc(result, size * sizeof(char *));
+			if (nresult == NULL) {
+				free(result);
+				return NULL;
+			}
+			result = nresult;
+		}
+		len = i - start;
+		temp = malloc(len + 1);
+		if (temp == NULL) {
+			for (i = 0; i < idx; i++)
+				free(result[i]);
+			free(result);
+			return NULL;
+		}
+		(void)strncpy(temp, &str[start], len);
+		temp[len] = '\0';
+		result[idx++] = temp;
+		result[idx] = NULL;
+		if (str[i])
+			i++;
+	}
+	return (result);
+}
+
+
+/*
+ * limit size of history record to ``max'' events
+ */
+void
+stifle_history(int max)
+{
+	TYPE(HistEvent) ev;
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+
+	if (FUNW(history)(h, &ev, H_SETSIZE, max) == 0)
+		max_input_history = max;
+}
+
+
+/*
+ * "unlimit" size of history - set the limit to maximum allowed int value
+ */
+int
+unstifle_history(void)
+{
+	TYPE(HistEvent) ev;
+	int omax;
+
+	FUNW(history)(h, &ev, H_SETSIZE, INT_MAX);
+	omax = max_input_history;
+	max_input_history = INT_MAX;
+	return (omax);		/* some value _must_ be returned */
+}
+
+
+int
+history_is_stifled(void)
+{
+
+	/* cannot return true answer */
+	return (max_input_history != INT_MAX);
+}
+
+static const char _history_tmp_template[] = "/tmp/.historyXXXXXX";
+
+int
+history_truncate_file (const char *filename, int nlines)
+{
+	int ret = 0;
+	FILE *fp, *tp;
+	char template[sizeof(_history_tmp_template)];
+	char buf[4096];
+	int fd;
+	char *cp;
+	off_t off;
+	int count = 0;
+	ssize_t left = 0;
+
+	if (filename == NULL && (filename = _default_history_file()) == NULL)
+		return errno;
+	if ((fp = fopen(filename, "r+")) == NULL)
+		return errno;
+	strcpy(template, _history_tmp_template);
+	if ((fd = mkstemp(template)) == -1) {
+		ret = errno;
+		goto out1;
+	}
+
+	if ((tp = fdopen(fd, "r+")) == NULL) {
+		close(fd);
+		ret = errno;
+		goto out2;
+	}
+
+	for(;;) {
+		if (fread(buf, sizeof(buf), 1, fp) != 1) {
+			if (ferror(fp)) {
+				ret = errno;
+				break;
+			}
+			if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) ==
+			    (off_t)-1) {
+				ret = errno;
+				break;
+			}
+			left = fread(buf, 1, sizeof(buf), fp);
+			if (ferror(fp)) {
+				ret = errno;
+				break;
+			}
+			if (left == 0) {
+				count--;
+				left = sizeof(buf);
+			} else if (fwrite(buf, (size_t)left, 1, tp) != 1) {
+				ret = errno;
+				break;
+			}
+			fflush(tp);
+			break;
+		}
+		if (fwrite(buf, sizeof(buf), 1, tp) != 1) {
+			ret = errno;
+			break;
+		}
+		count++;
+	}
+	if (ret)
+		goto out3;
+	cp = buf + left - 1;
+	if(*cp != '\n')
+		cp++;
+	for(;;) {
+		while (--cp >= buf) {
+			if (*cp == '\n') {
+				if (--nlines == 0) {
+					if (++cp >= buf + sizeof(buf)) {
+						count++;
+						cp = buf;
+					}
+					break;
+				}
+			}
+		}
+		if (nlines <= 0 || count == 0)
+			break;
+		count--;
+		if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) {
+			ret = errno;
+			break;
+		}
+		if (fread(buf, sizeof(buf), 1, tp) != 1) {
+			if (ferror(tp)) {
+				ret = errno;
+				break;
+			}
+			ret = EAGAIN;
+			break;
+		}
+		cp = buf + sizeof(buf);
+	}
+
+	if (ret || nlines > 0)
+		goto out3;
+
+	if (fseeko(fp, 0, SEEK_SET) == (off_t)-1) {
+		ret = errno;
+		goto out3;
+	}
+
+	if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) ==
+	    (off_t)-1) {
+		ret = errno;
+		goto out3;
+	}
+
+	for(;;) {
+		if ((left = fread(buf, 1, sizeof(buf), tp)) == 0) {
+			if (ferror(fp))
+				ret = errno;
+			break;
+		}
+		if (fwrite(buf, (size_t)left, 1, fp) != 1) {
+			ret = errno;
+			break;
+		}
+	}
+	fflush(fp);
+	if((off = ftello(fp)) > 0)
+		(void)ftruncate(fileno(fp), off);
+out3:
+	fclose(tp);
+out2:
+	unlink(template);
+out1:
+	fclose(fp);
+
+	return ret;
+}
+
+
+/*
+ * read history from a file given
+ */
+int
+read_history(const char *filename)
+{
+	TYPE(HistEvent) ev;
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+	if (filename == NULL && (filename = _default_history_file()) == NULL)
+		return errno;
+	return (FUNW(history)(h, &ev, H_LOAD, filename) == -1 ?
+	    (errno ? errno : EINVAL) : 0);
+}
+
+
+/*
+ * write history to a file given
+ */
+int
+write_history(const char *filename)
+{
+	TYPE(HistEvent) ev;
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+	if (filename == NULL && (filename = _default_history_file()) == NULL)
+		return errno;
+	return (FUNW(history)(h, &ev, H_SAVE, filename) == -1 ?
+	    (errno ? errno : EINVAL) : 0);
+}
+
+
+/*
+ * returns history ``num''th event
+ *
+ * returned pointer points to static variable
+ */
+HIST_ENTRY *
+history_get(int num)
+{
+	static HIST_ENTRY she;
+	TYPE(HistEvent) ev;
+	int curr_num;
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+
+	/* save current position */
+	if (FUNW(history)(h, &ev, H_CURR) != 0)
+		return (NULL);
+	curr_num = ev.num;
+
+	/* start from the oldest */
+	if (FUNW(history)(h, &ev, H_LAST) != 0)
+		return (NULL);	/* error */
+
+	/* look forwards for event matching specified offset */
+	if (FUNW(history)(h, &ev, H_NEXT_EVDATA, num, &she.data))
+		return (NULL);
+
+	she.line = ct_encode_string(ev.str, &conv);
+
+	/* restore pointer to where it was */
+	(void)FUNW(history)(h, &ev, H_SET, curr_num);
+
+	return (&she);
+}
+
+
+/*
+ * add the line to history table
+ */
+int
+add_history(const char *line)
+{
+	TYPE(HistEvent) ev;
+	const Char *wline;
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+
+	wline = ct_decode_string(line, &conv);
+
+	(void)FUNW(history)(h, &ev, H_ENTER, wline);
+	if (FUNW(history)(h, &ev, H_GETSIZE) == 0)
+		history_length = ev.num;
+
+	return (!(history_length > 0)); /* return 0 if all is okay */
+}
+
+
+/*
+ * remove the specified entry from the history list and return it.
+ */
+HIST_ENTRY *
+remove_history(int num)
+{
+	HIST_ENTRY *he;
+	TYPE(HistEvent) ev;
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+
+	if ((he = malloc(sizeof(*he))) == NULL)
+		return NULL;
+
+	if (FUNW(history)(h, &ev, H_DELDATA, num, &he->data) != 0) {
+		free(he);
+		return NULL;
+	}
+
+	he->line = ct_encode_string(ev.str, &conv);
+	if (FUNW(history)(h, &ev, H_GETSIZE) == 0)
+		history_length = ev.num;
+
+	return he;
+}
+
+
+/*
+ * replace the line and data of the num-th entry
+ */
+HIST_ENTRY *
+replace_history_entry(int num, const char *line, histdata_t data)
+{
+	HIST_ENTRY *he;
+	TYPE(HistEvent) ev;
+	int curr_num;
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+
+	/* save current position */
+	if (FUNW(history)(h, &ev, H_CURR) != 0)
+		return NULL;
+	curr_num = ev.num;
+
+	/* start from the oldest */
+	if (FUNW(history)(h, &ev, H_LAST) != 0)
+		return NULL;	/* error */
+
+	if ((he = malloc(sizeof(*he))) == NULL)
+		return NULL;
+
+	/* look forwards for event matching specified offset */
+	if (FUNW(history)(h, &ev, H_NEXT_EVDATA, num, &he->data))
+		goto out;
+
+	he->line = strdup(ct_encode_string(ev.str, &e->el_scratch));
+	if (he->line == NULL)
+		goto out;
+
+	if (FUNW(history)(h, &ev, H_REPLACE, line, data))
+		goto out;
+
+	/* restore pointer to where it was */
+	if (FUNW(history)(h, &ev, H_SET, curr_num))
+		goto out;
+
+	return he;
+out:
+	free(he);
+	return NULL;
+}
+
+/*
+ * clear the history list - delete all entries
+ */
+void
+clear_history(void)
+{
+	TYPE(HistEvent) ev;
+
+	(void)FUNW(history)(h, &ev, H_CLEAR);
+	history_length = 0;
+}
+
+
+/*
+ * returns offset of the current history event
+ */
+int
+where_history(void)
+{
+	TYPE(HistEvent) ev;
+	int curr_num, off;
+
+	if (FUNW(history)(h, &ev, H_CURR) != 0)
+		return (0);
+	curr_num = ev.num;
+
+	(void)FUNW(history)(h, &ev, H_FIRST);
+	off = 1;
+	while (ev.num != curr_num && FUNW(history)(h, &ev, H_NEXT) == 0)
+		off++;
+
+	return (off);
+}
+
+
+/*
+ * returns current history event or NULL if there is no such event
+ */
+HIST_ENTRY *
+current_history(void)
+{
+
+	return (_move_history(H_CURR));
+}
+
+
+/*
+ * returns total number of bytes history events' data are using
+ */
+int
+history_total_bytes(void)
+{
+	TYPE(HistEvent) ev;
+	int curr_num;
+	size_t size;
+
+	if (FUNW(history)(h, &ev, H_CURR) != 0)
+		return (-1);
+	curr_num = ev.num;
+
+	(void)FUNW(history)(h, &ev, H_FIRST);
+	size = 0;
+	do
+		size += Strlen(ev.str) * sizeof(*ev.str);
+	while (FUNW(history)(h, &ev, H_NEXT) == 0);
+
+	/* get to the same position as before */
+	FUNW(history)(h, &ev, H_PREV_EVENT, curr_num);
+
+	return (int)(size);
+}
+
+
+/*
+ * sets the position in the history list to ``pos''
+ */
+int
+history_set_pos(int pos)
+{
+	TYPE(HistEvent) ev;
+	int curr_num;
+
+	if (pos >= history_length || pos < 0)
+		return (-1);
+
+	(void)FUNW(history)(h, &ev, H_CURR);
+	curr_num = ev.num;
+
+	/*
+	 * use H_DELDATA to set to nth history (without delete) by passing
+	 * (void **)-1
+	 */
+	if (FUNW(history)(h, &ev, H_DELDATA, pos, (void **)-1)) {
+		(void)FUNW(history)(h, &ev, H_SET, curr_num);
+		return(-1);
+	}
+	return (0);
+}
+
+
+/*
+ * returns previous event in history and shifts pointer accordingly
+ */
+HIST_ENTRY *
+previous_history(void)
+{
+
+	return (_move_history(H_PREV));
+}
+
+
+/*
+ * returns next event in history and shifts pointer accordingly
+ */
+HIST_ENTRY *
+next_history(void)
+{
+
+	return (_move_history(H_NEXT));
+}
+
+
+/*
+ * searches for first history event containing the str
+ */
+int
+history_search(const char *str, int direction)
+{
+	TYPE(HistEvent) ev;
+	const Char *strp;
+	const Char *wstr;
+	int curr_num;
+
+	if (FUNW(history)(h, &ev, H_CURR) != 0)
+		return (-1);
+	curr_num = ev.num;
+
+	wstr = ct_decode_string(str, &conv);
+	for (;;) {
+		if ((strp = Strstr(ev.str, wstr)) != NULL)
+			return (int) (strp - ev.str);
+		if (FUNW(history)(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
+			break;
+	}
+	(void)FUNW(history)(h, &ev, H_SET, curr_num);
+	return (-1);
+}
+
+
+/*
+ * searches for first history event beginning with str
+ */
+int
+history_search_prefix(const char *str, int direction)
+{
+	TYPE(HistEvent) ev;
+
+	return (FUNW(history)(h, &ev, direction < 0 ?
+	    H_PREV_STR : H_NEXT_STR, str));
+}
+
+
+/*
+ * search for event in history containing str, starting at offset
+ * abs(pos); continue backward, if pos<0, forward otherwise
+ */
+/* ARGSUSED */
+int
+history_search_pos(const char *str,
+		   int direction __attribute__((__unused__)), int pos)
+{
+	TYPE(HistEvent) ev;
+	int curr_num, off;
+	const Char *wstr;
+
+	off = (pos > 0) ? pos : -pos;
+	pos = (pos > 0) ? 1 : -1;
+
+	if (FUNW(history)(h, &ev, H_CURR) != 0)
+		return (-1);
+	curr_num = ev.num;
+
+	if (history_set_pos(off) != 0 || FUNW(history)(h, &ev, H_CURR) != 0)
+		return (-1);
+
+	wstr = ct_decode_string(str, &conv);
+	for (;;) {
+		if (Strstr(ev.str, wstr))
+			return (off);
+		if (FUNW(history)(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
+			break;
+	}
+
+	/* set "current" pointer back to previous state */
+	(void)FUNW(history)(h, &ev,
+	    pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
+
+	return (-1);
+}
+
+
+/********************************/
+/* completion functions */
+
+char *
+tilde_expand(char *name)
+{
+	return fn_tilde_expand(name);
+}
+
+char *
+filename_completion_function(const char *name, int state)
+{
+	return fn_filename_completion_function(name, state);
+}
+
+/*
+ * a completion generator for usernames; returns _first_ username
+ * which starts with supplied text
+ * text contains a partial username preceded by random character
+ * (usually '~'); state is ignored
+ * it's callers responsibility to free returned value
+ */
+char *
+username_completion_function(const char *text, int state)
+{
+	struct passwd *pwd, pwres;
+	char pwbuf[1024];
+
+	if (text[0] == '\0')
+		return (NULL);
+
+	if (*text == '~')
+		text++;
+
+	if (state == 0)
+		setpwent();
+
+	while (getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pwd) == 0
+	    && pwd != NULL && text[0] == pwd->pw_name[0]
+	    && strcmp(text, pwd->pw_name) == 0);
+
+	if (pwd == NULL) {
+		endpwent();
+		return NULL;
+	}
+	return strdup(pwd->pw_name);
+}
+
+
+/*
+ * el-compatible wrapper to send TSTP on ^Z
+ */
+/* ARGSUSED */
+static unsigned char
+_el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
+{
+	(void)kill(0, SIGTSTP);
+	return CC_NORM;
+}
+
+/*
+ * Display list of strings in columnar format on readline's output stream.
+ * 'matches' is list of strings, 'len' is number of strings in 'matches',
+ * 'max' is maximum length of string in 'matches'.
+ */
+void
+rl_display_match_list(char **matches, int len, int max)
+{
+
+	fn_display_match_list(e, matches, (size_t)len, (size_t)max);
+}
+
+static const char *
+/*ARGSUSED*/
+_rl_completion_append_character_function(const char *dummy
+    __attribute__((__unused__)))
+{
+	static char buf[2];
+	buf[0] = rl_completion_append_character;
+	buf[1] = '\0';
+	return buf;
+}
+
+
+/*
+ * complete word at current point
+ */
+/* ARGSUSED */
+int
+rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
+{
+#ifdef WIDECHAR
+	static ct_buffer_t wbreak_conv, sprefix_conv;
+#endif
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+
+	if (rl_inhibit_completion) {
+		char arr[2];
+		arr[0] = (char)invoking_key;
+		arr[1] = '\0';
+		el_insertstr(e, arr);
+		return (CC_REFRESH);
+	}
+
+	/* Just look at how many global variables modify this operation! */
+	return fn_complete(e,
+	    (CPFunction *)rl_completion_entry_function,
+	    rl_attempted_completion_function,
+	    ct_decode_string(rl_basic_word_break_characters, &wbreak_conv),
+	    ct_decode_string(rl_special_prefixes, &sprefix_conv),
+	    _rl_completion_append_character_function,
+	    (size_t)rl_completion_query_items,
+	    &rl_completion_type, &rl_attempted_completion_over,
+	    &rl_point, &rl_end, NULL, NULL, NULL);
+}
+
+
+/* ARGSUSED */
+static unsigned char
+_el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
+{
+	return (unsigned char)rl_complete(0, ch);
+}
+
+/*
+ * misc other functions
+ */
+
+/*
+ * bind key c to readline-type function func
+ */
+int
+rl_bind_key(int c, rl_command_func_t *func)
+{
+	int retval = -1;
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+
+	if (func == rl_insert) {
+		/* XXX notice there is no range checking of ``c'' */
+		e->el_map.key[c] = ED_INSERT;
+		retval = 0;
+	}
+	return (retval);
+}
+
+
+/*
+ * read one key from input - handles chars pushed back
+ * to input stream also
+ */
+int
+rl_read_key(void)
+{
+	char fooarr[2 * sizeof(int)];
+
+	if (e == NULL || h == NULL)
+		rl_initialize();
+
+	return (el_getc(e, fooarr));
+}
+
+
+/*
+ * reset the terminal
+ */
+/* ARGSUSED */
+void
+rl_reset_terminal(const char *p __attribute__((__unused__)))
+{
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+	el_reset(e);
+}
+
+
+/*
+ * insert character ``c'' back into input stream, ``count'' times
+ */
+int
+rl_insert(int count, int c)
+{
+	char arr[2];
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+
+	/* XXX - int -> char conversion can lose on multichars */
+	arr[0] = c;
+	arr[1] = '\0';
+
+	for (; count > 0; count--)
+		el_push(e, arr);
+
+	return (0);
+}
+
+int
+rl_insert_text(const char *text)
+{
+	if (!text || *text == 0)
+		return (0);
+
+	if (h == NULL || e == NULL)
+		rl_initialize();
+
+	if (el_insertstr(e, text) < 0)
+		return (0);
+	return (int)strlen(text);
+}
+
+/*ARGSUSED*/
+int
+rl_newline(int count, int c)
+{
+	/*
+	 * Readline-4.0 appears to ignore the args.
+	 */
+	return rl_insert(1, '\n');
+}
+
+/*ARGSUSED*/
+static unsigned char
+rl_bind_wrapper(EditLine *el, unsigned char c)
+{
+	if (map[c] == NULL)
+	    return CC_ERROR;
+
+	_rl_update_pos();
+
+	(*map[c])(NULL, c);
+
+	/* If rl_done was set by the above call, deal with it here */
+	if (rl_done)
+		return CC_EOF;
+
+	return CC_NORM;
+}
+
+int
+rl_add_defun(const char *name, Function *fun, int c)
+{
+	char dest[8];
+	if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0)
+		return -1;
+	map[(unsigned char)c] = fun;
+	el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
+	vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
+	el_set(e, EL_BIND, dest, name);
+	return 0;
+}
+
+void
+rl_callback_read_char()
+{
+	int count = 0, done = 0;
+	const char *buf = el_gets(e, &count);
+	char *wbuf;
+
+	if (buf == NULL || count-- <= 0)
+		return;
+	if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
+		done = 1;
+	if (buf[count] == '\n' || buf[count] == '\r')
+		done = 2;
+
+	if (done && rl_linefunc != NULL) {
+		el_set(e, EL_UNBUFFERED, 0);
+		if (done == 2) {
+		    if ((wbuf = strdup(buf)) != NULL)
+			wbuf[count] = '\0';
+		} else
+			wbuf = NULL;
+		(*(void (*)(const char *))rl_linefunc)(wbuf);
+		//el_set(e, EL_UNBUFFERED, 1);
+	}
+}
+
+void 
+rl_callback_handler_install(const char *prompt, VCPFunction *linefunc)
+{
+	if (e == NULL) {
+		rl_initialize();
+	}
+	(void)rl_set_prompt(prompt);
+	rl_linefunc = linefunc;
+	el_set(e, EL_UNBUFFERED, 1);
+}   
+
+void 
+rl_callback_handler_remove(void)
+{
+	el_set(e, EL_UNBUFFERED, 0);
+	rl_linefunc = NULL;
+}
+
+void
+rl_redisplay(void)
+{
+	char a[2];
+	a[0] = e->el_tty.t_c[TS_IO][C_REPRINT];
+	a[1] = '\0';
+	el_push(e, a);
+}
+
+int
+rl_get_previous_history(int count, int key)
+{
+	char a[2];
+	a[0] = key;
+	a[1] = '\0';
+	while (count--)
+		el_push(e, a);
+	return 0;
+}
+
+void
+/*ARGSUSED*/
+rl_prep_terminal(int meta_flag)
+{
+	el_set(e, EL_PREP_TERM, 1);
+}
+
+void
+rl_deprep_terminal(void)
+{
+	el_set(e, EL_PREP_TERM, 0);
+}
+
+int
+rl_read_init_file(const char *s)
+{
+	return(el_source(e, s));
+}
+
+int
+rl_parse_and_bind(const char *line)
+{
+	const char **argv;
+	int argc;
+	Tokenizer *tok;
+
+	tok = tok_init(NULL);
+	tok_str(tok, line, &argc, &argv);
+	argc = el_parse(e, argc, argv);
+	tok_end(tok);
+	return (argc ? 1 : 0);
+}
+
+int
+rl_variable_bind(const char *var, const char *value)
+{
+	/*
+	 * The proper return value is undocument, but this is what the
+	 * readline source seems to do.
+	 */
+	return ((el_set(e, EL_BIND, "", var, value) == -1) ? 1 : 0);
+}
+
+void
+rl_stuff_char(int c)
+{
+	char buf[2];
+
+	buf[0] = c;
+	buf[1] = '\0';
+	el_insertstr(e, buf);
+}
+
+static int
+_rl_event_read_char(EditLine *el, char *cp)
+{
+	int	n;
+	ssize_t num_read = 0;
+
+	*cp = '\0';
+	while (rl_event_hook) {
+
+		(*rl_event_hook)();
+
+#if defined(FIONREAD)
+		if (ioctl(el->el_infd, FIONREAD, &n) < 0)
+			return(-1);
+		if (n)
+			num_read = read(el->el_infd, cp, 1);
+		else
+			num_read = 0;
+#elif defined(F_SETFL) && defined(O_NDELAY)
+		if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
+			return(-1);
+		if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
+			return(-1);
+		num_read = read(el->el_infd, cp, 1);
+		if (fcntl(el->el_infd, F_SETFL, n))
+			return(-1);
+#else
+		/* not non-blocking, but what you gonna do? */
+		num_read = read(el->el_infd, cp, 1);
+		return(-1);
+#endif
+
+		if (num_read < 0 && errno == EAGAIN)
+			continue;
+		if (num_read == 0)
+			continue;
+		break;
+	}
+	if (!rl_event_hook)
+		el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
+	return (int)num_read;
+}
+
+static void
+_rl_update_pos(void)
+{
+	const LineInfo *li = el_line(e);
+
+	rl_point = (int)(li->cursor - li->buffer);
+	rl_end = (int)(li->lastchar - li->buffer);
+}
+
+void
+rl_get_screen_size(int *rows, int *cols)
+{
+	if (rows)
+		el_get(e, EL_GETTC, "li", rows);
+	if (cols)
+		el_get(e, EL_GETTC, "co", cols);
+}
+
+void
+rl_set_screen_size(int rows, int cols)
+{
+	char buf[64];
+	(void)snprintf(buf, sizeof(buf), "%d", rows);
+	el_set(e, EL_SETTC, "li", buf);
+	(void)snprintf(buf, sizeof(buf), "%d", cols);
+	el_set(e, EL_SETTC, "co", buf);
+}
+
+char **
+rl_completion_matches(const char *str, rl_compentry_func_t *fun)
+{
+	size_t len, max, i, j, min;
+	char **list, *match, *a, *b;
+
+	len = 1;
+	max = 10;
+	if ((list = malloc(max * sizeof(*list))) == NULL)
+		return NULL;
+
+	while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
+		list[len++] = match;
+		if (len == max) {
+			char **nl;
+			max += 10;
+			if ((nl = realloc(list, max * sizeof(*nl))) == NULL)
+				goto out;
+			list = nl;
+		}
+	}
+	if (len == 1)
+		goto out;
+	list[len] = NULL;
+	if (len == 2) {
+		if ((list[0] = strdup(list[1])) == NULL)
+			goto out;
+		return list;
+	}
+	qsort(&list[1], len - 1, sizeof(*list),
+	    (int (*)(const void *, const void *)) strcmp);
+	min = SIZE_T_MAX;
+	for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
+		b = list[i + 1];
+		for (j = 0; a[j] && a[j] == b[j]; j++)
+			continue;
+		if (min > j)
+			min = j;
+	}
+	if (min == 0 && *str) {
+		if ((list[0] = strdup(str)) == NULL)
+			goto out;
+	} else {
+		if ((list[0] = malloc(min + 1)) == NULL)
+			goto out;
+		(void)memcpy(list[0], list[1], min);
+		list[0][min] = '\0';
+	}
+	return list;
+		
+out:
+	free(list);
+	return NULL;
+}
+
+char *
+rl_filename_completion_function (const char *text, int state)
+{
+	return fn_filename_completion_function(text, state);
+}
+
+void
+rl_forced_update_display(void)
+{
+	el_set(e, EL_REFRESH);
+}
+
+int
+_rl_abort_internal(void)
+{
+	el_beep(e);
+	longjmp(topbuf, 1);
+	/*NOTREACHED*/
+}
+
+int
+_rl_qsort_string_compare(char **s1, char **s2)
+{
+	return strcoll(*s1, *s2);
+}
+
+HISTORY_STATE *
+history_get_history_state(void)
+{
+	HISTORY_STATE *hs;
+
+	if ((hs = malloc(sizeof(HISTORY_STATE))) == NULL)
+		return (NULL);
+	hs->length = history_length;
+	return (hs);
+}
+
+int
+/*ARGSUSED*/
+rl_kill_text(int from, int to)
+{
+	return 0;
+}
+
+Keymap
+rl_make_bare_keymap(void)
+{
+	return NULL;
+}
+
+Keymap
+rl_get_keymap(void)
+{
+	return NULL;
+}
+
+void
+/*ARGSUSED*/
+rl_set_keymap(Keymap k)
+{
+}
+
+int
+/*ARGSUSED*/
+rl_generic_bind(int type, const char * keyseq, const char * data, Keymap k)
+{
+	return 0;
+}
+
+int
+/*ARGSUSED*/
+rl_bind_key_in_map(int key, rl_command_func_t *fun, Keymap k)
+{
+	return 0;
+}
+
+/* unsupported, but needed by python */
+void
+rl_cleanup_after_signal(void)
+{
+}
+
+int
+rl_on_new_line(void)
+{
+	return 0;
+}