4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 // Stefan Bund <g0dil@berlios.de>
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 2 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the
20 // Free Software Foundation, Inc.,
21 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 \brief Readline non-inline non-template implementation */
26 #include "Readline.hh"
27 //#include "Readline.ih"
31 #include <readline/readline.h>
32 #include <readline/history.h>
33 #include <boost/algorithm/string/trim.hpp>
34 #include <boost/algorithm/string/replace.hpp>
35 #include "../Utils/membind.hh"
37 //#include "Readline.mpp"
39 ///////////////////////////////cc.p////////////////////////////////////////
42 // Readline integration is a bit awkward. There are several things to it:
44 // - Readline uses global variables for all state. Therefore, we can use readline only for one
46 // - We need to make readline to read from the socket handle instead of some input stream. We can
47 // do this by setting a custom rl_getc_function.
48 // - We need to make readline to write to the NonblockingSocketOStream. This is possible in glibc
49 // by using a 'cookie stream'.
50 // - We need to correctly handle the terminal mode settings. Currently we unconditionally
51 // initialize the remote telnet by sending a fixed telnet option string and ignoring any otpions
53 // - We need to make sure, readline never uses stderr -> we must disable beeping
54 // - There are places, where readline calls read_key unconditionally even when NOT prompted by the
55 // callback that another key is available. One such place is completion. (The 'show all
56 // completions (y/n)?' question). For now, we disable completion support.
59 ///////////////////////////////////////////////////////////////////////////
60 // senf::console::detail::ReadlineClientReader
62 extern int readline_echoing_p;
63 extern int _rl_bell_preference;
67 int readline_getc_function(FILE *)
69 if (senf::console::detail::ReadlineClientReader::active())
70 return senf::console::detail::ReadlineClientReader::instance().getc();
75 void readline_callback(char * input)
77 if (senf::console::detail::ReadlineClientReader::active() && input)
78 return senf::console::detail::ReadlineClientReader::instance().callback(
82 ssize_t readline_cookie_write_function(void * cookie, char const * buffer, size_t size)
84 if (senf::console::detail::ReadlineClientReader::active() && buffer)
85 senf::console::detail::ReadlineClientReader::instance().write(
86 std::string(buffer, size));
90 void readline_prep_term(int meta)
92 readline_echoing_p = 1;
95 void readline_deprep_term()
100 prefix_ senf::console::detail::ReadlineClientReader::ReadlineClientReader(Client & client)
101 : ClientReader(client), ch_ (-1), skipChars_ (0),
102 schedBinding_ ( client.handle(),
103 senf::membind(&ReadlineClientReader::charEvent, this),
109 throw DuplicateReaderException();
112 cookie_io_functions_t cookie_io = { 0, &readline_cookie_write_function, 0, 0 };
113 rl_outstream = fopencookie(0, "a", cookie_io);
114 if (rl_outstream == 0)
115 SENF_THROW_SYSTEM_EXCEPTION("");
116 if (setvbuf(rl_outstream, 0, _IONBF, BUFSIZ) < 0)
117 SENF_THROW_SYSTEM_EXCEPTION("");
118 rl_instream = rl_outstream;
119 rl_terminal_name = "vt100";
120 strncpy(nameBuffer_, client.name().c_str(), 128);
121 nameBuffer_[127] = 0;
122 rl_readline_name = nameBuffer_;
123 rl_prep_term_function = &readline_prep_term;
124 rl_deprep_term_function = &readline_deprep_term;
125 rl_getc_function = &readline_getc_function;
126 rl_bind_key('\t', &rl_insert);
129 // Don't ask me, where I found this ...
130 static char options[] = { 0xFF, 0xFB, 0x01, // IAC WILL ECHO
131 0xFF, 0xFE, 0x22, // IAC DONT LINEMODE
132 0xFF, 0xFB, 0x03, // IAC WILL SGA
134 handle().write(options, options+sizeof(options));
136 strncpy(promptBuffer_, promptString().c_str(), 1024);
137 promptBuffer_[1023] = 0;
138 rl_callback_handler_install(promptBuffer_, &readline_callback);
140 _rl_bell_preference = 0; // Set this *after* the config file has been read
142 schedBinding_.enable();
145 prefix_ senf::console::detail::ReadlineClientReader::~ReadlineClientReader()
147 rl_callback_handler_remove();
148 fclose(rl_outstream);
154 prefix_ void senf::console::detail::ReadlineClientReader::callback(std::string line)
158 add_history(line.c_str());
160 stream() << std::flush;
161 strncpy(promptBuffer_, promptString().c_str(), 1024);
162 promptBuffer_[1023] = 0;
163 rl_set_prompt(promptBuffer_);
166 prefix_ void senf::console::detail::ReadlineClientReader::v_disablePrompt()
169 prefix_ void senf::console::detail::ReadlineClientReader::v_enablePrompt()
172 prefix_ void senf::console::detail::ReadlineClientReader::v_translate(std::string & data)
174 boost::replace_all(data, "\n", "\n\r");
175 boost::replace_all(data, "\xff", "\xff\xff");
178 prefix_ void senf::console::detail::ReadlineClientReader::charEvent(Scheduler::EventId event)
181 if (event != Scheduler::EV_READ || handle().read(&ch, &ch+1) <= &ch) {
189 else if (ch_ == static_cast<char>(0xff))
192 rl_callback_read_char();
198 senf::console::detail::ReadlineClientReader *
199 senf::console::detail::ReadlineClientReader::instance_ (0);
201 ///////////////////////////////////////////////////////////////////////////
202 // senf::console::detail::SafeReadlineClientReader
204 prefix_ void senf::console::detail::SafeReadlineClientReader::v_disablePrompt()
206 reader_->disablePrompt();
209 prefix_ void senf::console::detail::SafeReadlineClientReader::v_enablePrompt()
211 reader_->enablePrompt();
214 prefix_ void senf::console::detail::SafeReadlineClientReader::v_translate(std::string & data)
216 reader_->translate(data);
219 ///////////////////////////////cc.e////////////////////////////////////////
221 //#include "Readline.mpp"
227 // comment-column: 40
228 // c-file-style: "senf"
229 // indent-tabs-mode: nil
230 // ispell-local-dictionary: "american"
231 // compile-command: "scons -u test"