summaryrefslogtreecommitdiff
path: root/source3/lib/readline.c
blob: 9d1597abb1a5927053ba4b038cfbc9c64d37372c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/* 
   Unix SMB/CIFS implementation.
   Samba readline wrapper implementation
   Copyright (C) Simo Sorce 2001
   Copyright (C) Andrew Tridgell 2001
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"

#ifdef HAVE_LIBREADLINE
#  ifdef HAVE_READLINE_READLINE_H
#    include <readline/readline.h>
#    ifdef HAVE_READLINE_HISTORY_H
#      include <readline/history.h>
#    endif
#  else
#    ifdef HAVE_READLINE_H
#      include <readline.h>
#      ifdef HAVE_HISTORY_H
#        include <history.h>
#      endif
#    else
#      undef HAVE_LIBREADLINE
#    endif
#  endif
#endif

#ifdef HAVE_NEW_LIBREADLINE
#  define RL_COMPLETION_CAST (rl_completion_func_t *)
#else
/* This type is missing from libreadline<4.0  (approximately) */
#  define RL_COMPLETION_CAST
#endif /* HAVE_NEW_LIBREADLINE */

/****************************************************************************
 Display the prompt and wait for input. Call callback() regularly
****************************************************************************/

static char *smb_readline_replacement(const char *prompt, void (*callback)(void), 
				char **(completion_fn)(const char *text, int start, int end))
{
	fd_set fds;
	static pstring line;
	struct timeval timeout;
	int fd = x_fileno(x_stdin);
	char *ret;

	/* Prompt might be NULL in non-interactive mode. */
	if (prompt) {
		x_fprintf(x_stdout, "%s", prompt);
		x_fflush(x_stdout);
	}

	while (1) {
		timeout.tv_sec = 5;
		timeout.tv_usec = 0;

		FD_ZERO(&fds);
		FD_SET(fd,&fds);
	
		if (sys_select_intr(fd+1,&fds,NULL,NULL,&timeout) == 1) {
			ret = x_fgets(line, sizeof(line), x_stdin);
			return ret;
		}
		if (callback)
			callback();
	}
}

/****************************************************************************
 Display the prompt and wait for input. Call callback() regularly.
****************************************************************************/

char *smb_readline(const char *prompt, void (*callback)(void), 
		   char **(completion_fn)(const char *text, int start, int end))
{
	char *ret;
	bool interactive;

	interactive = isatty(x_fileno(x_stdin)) || getenv("CLI_FORCE_INTERACTIVE");
	if (!interactive) {
	    return smb_readline_replacement(NULL, callback, completion_fn);
	}

#if HAVE_LIBREADLINE

	/* Aargh!  Readline does bizzare things with the terminal width
	that mucks up expect(1).  Set CLI_NO_READLINE in the environment
	to force readline not to be used. */

	if (getenv("CLI_NO_READLINE"))
		return smb_readline_replacement(prompt, callback, completion_fn);

	if (completion_fn) {
		/* The callback prototype has changed slightly between
		different versions of Readline, so the same function
		works in all of them to date, but we get compiler
		warnings in some.  */
		rl_attempted_completion_function = RL_COMPLETION_CAST completion_fn;
	}

#if HAVE_DECL_RL_EVENT_HOOK
	if (callback)
		rl_event_hook = (Function *)callback;
#endif
	ret = readline(prompt);
	if (ret && *ret)
		add_history(ret);

#else
	ret = smb_readline_replacement(prompt, callback, completion_fn);
#endif

	return ret;
}

/****************************************************************************
 * return line buffer text
 ****************************************************************************/
const char *smb_readline_get_line_buffer(void)
{
#if defined(HAVE_LIBREADLINE)
	return rl_line_buffer;
#else
	return NULL;
#endif
}


/****************************************************************************
 * set completion append character
 ***************************************************************************/
void smb_readline_ca_char(char c)
{
#if defined(HAVE_LIBREADLINE)
	rl_completion_append_character = c;
#endif
}

/****************************************************************************
history
****************************************************************************/
int cmd_history(void)
{
#if defined(HAVE_LIBREADLINE) && defined(HAVE_HISTORY_LIST)
	HIST_ENTRY **hlist;
	int i;

	hlist = history_list();
	
	for (i = 0; hlist && hlist[i]; i++) {
		DEBUG(0, ("%d: %s\n", i, hlist[i]->line));
	}
#else
	DEBUG(0,("no history without readline support\n"));
#endif

	return 0;
}