source: vendor/3.5.7/source3/lib/readline.c

Last change on this file was 591, checked in by Herwig Bauernfeind, 14 years ago

Samba 3.5: Update vendor to version 3.5.7

File size: 5.3 KB
Line 
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 3 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, see <http://www.gnu.org/licenses/>.
19*/
20
21#include "includes.h"
22
23#ifdef HAVE_LIBREADLINE
24# ifdef HAVE_READLINE_READLINE_H
25# include <readline/readline.h>
26# ifdef HAVE_READLINE_HISTORY_H
27# include <readline/history.h>
28# endif
29# else
30# ifdef HAVE_READLINE_H
31# include <readline.h>
32# ifdef HAVE_HISTORY_H
33# include <history.h>
34# endif
35# else
36# undef HAVE_LIBREADLINE
37# endif
38# endif
39#endif
40
41#ifdef HAVE_NEW_LIBREADLINE
42# define RL_COMPLETION_CAST (rl_completion_func_t *)
43#else
44/* This type is missing from libreadline<4.0 (approximately) */
45# define RL_COMPLETION_CAST
46#endif /* HAVE_NEW_LIBREADLINE */
47
48static bool smb_rl_done;
49
50#if HAVE_LIBREADLINE
51/*
52 * MacOS/X does not have rl_done in readline.h, but
53 * readline.so has it
54 */
55extern int rl_done;
56#endif
57
58void smb_readline_done(void)
59{
60 smb_rl_done = true;
61#if HAVE_LIBREADLINE
62 rl_done = 1;
63#endif
64}
65
66/****************************************************************************
67 Display the prompt and wait for input. Call callback() regularly
68****************************************************************************/
69
70static char *smb_readline_replacement(const char *prompt, void (*callback)(void),
71 char **(completion_fn)(const char *text, int start, int end))
72{
73 fd_set fds;
74 char *line = NULL;
75 struct timeval timeout;
76 int fd = x_fileno(x_stdin);
77 char *ret;
78
79 /* Prompt might be NULL in non-interactive mode. */
80 if (prompt) {
81 x_fprintf(x_stdout, "%s", prompt);
82 x_fflush(x_stdout);
83 }
84
85 line = (char *)SMB_MALLOC(BUFSIZ);
86 if (!line) {
87 return NULL;
88 }
89
90 while (!smb_rl_done) {
91 timeout.tv_sec = 5;
92 timeout.tv_usec = 0;
93
94 if (fd < 0 || fd >= FD_SETSIZE) {
95 errno = EBADF;
96 break;
97 }
98
99 FD_ZERO(&fds);
100 FD_SET(fd,&fds);
101
102 if (sys_select_intr(fd+1,&fds,NULL,NULL,&timeout) == 1) {
103 ret = x_fgets(line, BUFSIZ, x_stdin);
104 if (ret == 0) {
105 SAFE_FREE(line);
106 }
107 return ret;
108 }
109 if (callback) {
110 callback();
111 }
112 }
113 SAFE_FREE(line);
114 return NULL;
115}
116
117/****************************************************************************
118 Display the prompt and wait for input. Call callback() regularly.
119****************************************************************************/
120
121char *smb_readline(const char *prompt, void (*callback)(void),
122 char **(completion_fn)(const char *text, int start, int end))
123{
124 char *ret;
125 bool interactive;
126
127 interactive = isatty(x_fileno(x_stdin)) || getenv("CLI_FORCE_INTERACTIVE");
128 if (!interactive) {
129 return smb_readline_replacement(NULL, callback, completion_fn);
130 }
131
132#if HAVE_LIBREADLINE
133
134 /* Aargh! Readline does bizzare things with the terminal width
135 that mucks up expect(1). Set CLI_NO_READLINE in the environment
136 to force readline not to be used. */
137
138 if (getenv("CLI_NO_READLINE"))
139 return smb_readline_replacement(prompt, callback, completion_fn);
140
141 if (completion_fn) {
142 /* The callback prototype has changed slightly between
143 different versions of Readline, so the same function
144 works in all of them to date, but we get compiler
145 warnings in some. */
146 rl_attempted_completion_function = RL_COMPLETION_CAST completion_fn;
147 }
148
149#if HAVE_DECL_RL_EVENT_HOOK
150 if (callback)
151 rl_event_hook = (Function *)callback;
152#endif
153 ret = readline(prompt);
154 if (ret && *ret)
155 add_history(ret);
156
157#else
158 ret = smb_readline_replacement(prompt, callback, completion_fn);
159#endif
160
161 return ret;
162}
163
164/****************************************************************************
165 * return line buffer text
166 ****************************************************************************/
167const char *smb_readline_get_line_buffer(void)
168{
169#if defined(HAVE_LIBREADLINE)
170 return rl_line_buffer;
171#else
172 return NULL;
173#endif
174}
175
176
177/****************************************************************************
178 * set completion append character
179 ***************************************************************************/
180void smb_readline_ca_char(char c)
181{
182#if defined(HAVE_LIBREADLINE)
183 rl_completion_append_character = c;
184#endif
185}
186
187/****************************************************************************
188history
189****************************************************************************/
190int cmd_history(void)
191{
192#if defined(HAVE_LIBREADLINE) && defined(HAVE_HISTORY_LIST)
193 HIST_ENTRY **hlist;
194 int i;
195
196 hlist = history_list();
197
198 for (i = 0; hlist && hlist[i]; i++) {
199 DEBUG(0, ("%d: %s\n", i, hlist[i]->line));
200 }
201#else
202 DEBUG(0,("no history without readline support\n"));
203#endif
204
205 return 0;
206}
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