1/*
2   Unix SMB/CIFS implementation.
3   Samba readline wrapper implementation
4   Copyright (C) Simo Sorce 2001
5   Copyright (C) Andrew Tridgell 2001
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 2 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program; if not, write to the Free Software
19   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20*/
21
22#include "includes.h"
23
24#ifdef HAVE_LIBREADLINE
25#  ifdef HAVE_READLINE_READLINE_H
26#    include <readline/readline.h>
27#    ifdef HAVE_READLINE_HISTORY_H
28#      include <readline/history.h>
29#    endif
30#  else
31#    ifdef HAVE_READLINE_H
32#      include <readline.h>
33#      ifdef HAVE_HISTORY_H
34#        include <history.h>
35#      endif
36#    else
37#      undef HAVE_LIBREADLINE
38#    endif
39#  endif
40#endif
41
42#ifdef HAVE_NEW_LIBREADLINE
43#  define RL_COMPLETION_CAST (rl_completion_func_t *)
44#else
45/* This type is missing from libreadline<4.0  (approximately) */
46#  define RL_COMPLETION_CAST
47#endif /* HAVE_NEW_LIBREADLINE */
48
49/****************************************************************************
50 Display the prompt and wait for input. Call callback() regularly
51****************************************************************************/
52
53static char *smb_readline_replacement(char *prompt, void (*callback)(void),
54				char **(completion_fn)(const char *text, int start, int end))
55{
56	fd_set fds;
57	static pstring line;
58	struct timeval timeout;
59	int fd = x_fileno(x_stdin);
60	char *ret;
61
62	x_fprintf(dbf, "%s", prompt);
63	x_fflush(dbf);
64
65	while (1) {
66		timeout.tv_sec = 5;
67		timeout.tv_usec = 0;
68
69		FD_ZERO(&fds);
70		FD_SET(fd,&fds);
71
72		if (sys_select_intr(fd+1,&fds,NULL,NULL,&timeout) == 1) {
73			ret = x_fgets(line, sizeof(line), x_stdin);
74			return ret;
75		}
76		if (callback)
77			callback();
78	}
79}
80
81/****************************************************************************
82 Display the prompt and wait for input. Call callback() regularly.
83****************************************************************************/
84
85char *smb_readline(char *prompt, void (*callback)(void),
86		   char **(completion_fn)(const char *text, int start, int end))
87{
88#if HAVE_LIBREADLINE
89	if (isatty(x_fileno(x_stdin))) {
90		char *ret;
91
92		/* Aargh!  Readline does bizzare things with the terminal width
93		that mucks up expect(1).  Set CLI_NO_READLINE in the environment
94		to force readline not to be used. */
95
96		if (getenv("CLI_NO_READLINE"))
97			return smb_readline_replacement(prompt, callback, completion_fn);
98
99		if (completion_fn) {
100			/* The callback prototype has changed slightly between
101			different versions of Readline, so the same function
102			works in all of them to date, but we get compiler
103			warnings in some.  */
104			rl_attempted_completion_function = RL_COMPLETION_CAST completion_fn;
105		}
106
107		if (callback)
108			rl_event_hook = (Function *)callback;
109		ret = readline(prompt);
110		if (ret && *ret)
111			add_history(ret);
112		return ret;
113	} else
114#endif
115	return smb_readline_replacement(prompt, callback, completion_fn);
116}
117
118/****************************************************************************
119 * return line buffer text
120 ****************************************************************************/
121const char *smb_readline_get_line_buffer(void)
122{
123#if defined(HAVE_LIBREADLINE)
124	return rl_line_buffer;
125#else
126	return NULL;
127#endif
128}
129
130
131/****************************************************************************
132 * set completion append character
133 ***************************************************************************/
134void smb_readline_ca_char(char c)
135{
136#if defined(HAVE_LIBREADLINE)
137	rl_completion_append_character = c;
138#endif
139}
140
141/****************************************************************************
142history
143****************************************************************************/
144int cmd_history(void)
145{
146#if defined(HAVE_LIBREADLINE)
147	HIST_ENTRY **hlist;
148	int i;
149
150	hlist = history_list();
151
152	for (i = 0; hlist && hlist[i]; i++) {
153		DEBUG(0, ("%d: %s\n", i, hlist[i]->line));
154	}
155#else
156	DEBUG(0,("no history without readline support\n"));
157#endif
158
159	return 0;
160}
161
162