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1 /* TTY console functions.
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2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
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3 Copyright (C) 1994, 1995 Free Software Foundation, Inc.
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4 Copyright (C) 1996 Ben Wing.
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: Not in FSF. */
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24
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25 /* Authors: Ben Wing and Chuck Thompson. */
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26
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27 #include <config.h>
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28 #include "lisp.h"
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29
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30 #include "console-tty.h"
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31 #include "console-stream.h"
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32 #include "events.h" /* for Vcontrolling_terminal */
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33 #include "faces.h"
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34 #include "frame.h"
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35 #include "lstream.h"
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36 #include "redisplay.h"
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37 #include "sysdep.h"
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38 #ifdef MULE
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39 #include "mule-coding.h"
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40 #endif
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41
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42 DEFINE_CONSOLE_TYPE (tty);
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43
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44 Lisp_Object Qterminal_type;
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45
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46 Lisp_Object Vstdio_str;
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47
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48
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49 static void
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50 allocate_tty_console_struct (struct console *con)
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51 {
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52 con->console_data =
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53 (struct tty_console *) xmalloc (sizeof (struct tty_console));
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54
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55 /* zero out all slots. */
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56 memset (con->console_data, 0, sizeof (struct tty_console));
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57 /* except the lisp ones ... */
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58 CONSOLE_TTY_DATA (con)->terminal_type = Qnil;
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59 CONSOLE_TTY_DATA (con)->instream = Qnil;
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60 CONSOLE_TTY_DATA (con)->outstream = Qnil;
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61 }
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62
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63 static void
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64 tty_init_console (struct console *con, Lisp_Object props)
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65 {
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66 Lisp_Object tty = CONSOLE_CONNECTION (con), terminal_type = Qnil;
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67 int infd, outfd;
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68 struct gcpro gcpro1;
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69
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70 GCPRO1 (terminal_type);
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71
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72 terminal_type = Fplist_get (props, Qterminal_type, Qnil);
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73
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74 /* Determine the terminal type */
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75
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76 if (!NILP (terminal_type))
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77 CHECK_STRING (terminal_type);
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78 else
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79 {
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80 char *temp_type = (char *) getenv ("TERM");
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81
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82 if (!temp_type)
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83 {
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84 error ("Cannot determine terminal type");
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85 }
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86 else
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87 terminal_type = build_string (temp_type);
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88 }
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89
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90 /* Open the specified console */
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91
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92 allocate_tty_console_struct (con);
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93 if (!NILP (Fequal (tty, Vstdio_str)))
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94 {
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95 infd = fileno (stdin);
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96 outfd = fileno (stdout);
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97 CONSOLE_TTY_DATA (con)->is_stdio = 1;
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98 }
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99 else
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100 {
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101 infd = outfd = open ((char *) string_data (XSTRING (tty)), O_RDWR);
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102 if (infd < 0)
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103 error ("Unable to open tty %s", string_data (XSTRING (tty)));
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104 CONSOLE_TTY_DATA (con)->is_stdio = 0;
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105 }
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106
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107 CONSOLE_TTY_DATA (con)->infd = infd;
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108 CONSOLE_TTY_DATA (con)->outfd = outfd;
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109 CONSOLE_TTY_DATA (con)->instream = make_filedesc_input_stream (infd, 0,
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110 -1, 0);
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111 CONSOLE_TTY_DATA (con)->outstream = make_filedesc_output_stream (outfd, 0,
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112 -1, 0);
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113 CONSOLE_TTY_DATA (con)->terminal_type = terminal_type;
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114 if (NILP (CONSOLE_NAME (con)))
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115 CONSOLE_NAME (con) = Ffile_name_nondirectory (tty);
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116 {
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117 int tty_pg;
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118 int controlling_tty_pg;
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119 int cfd;
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120
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121 /* OK, the only sure-fire way I can think of to determine
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122 whether a particular TTY is our controlling TTY is to check
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123 if it has the same foreground process group as our controlling
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124 TTY. This is OK because a process group can never simultaneously
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125 be the foreground process group of two TTY's (in that case it
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126 would have two controlling TTY's, which is not allowed). */
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127
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128 EMACS_GET_TTY_PROCESS_GROUP (infd, &tty_pg);
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129 cfd = open ("/dev/tty", O_RDWR, 0);
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130 EMACS_GET_TTY_PROCESS_GROUP (cfd, &controlling_tty_pg);
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131 close (cfd);
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132 if (tty_pg == controlling_tty_pg)
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133 {
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134 CONSOLE_TTY_DATA (con)->controlling_terminal = 1;
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135 XSETCONSOLE (Vcontrolling_terminal, con);
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136 munge_tty_process_group ();
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137 }
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138 else
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139 CONSOLE_TTY_DATA (con)->controlling_terminal = 0;
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140 }
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141
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142 UNGCPRO;
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143 }
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144
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145 static void
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146 tty_mark_console (struct console *con, void (*markobj) (Lisp_Object))
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147 {
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148 ((markobj) (CONSOLE_TTY_DATA (con)->terminal_type));
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149 ((markobj) (CONSOLE_TTY_DATA (con)->instream));
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150 ((markobj) (CONSOLE_TTY_DATA (con)->outstream));
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151 }
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152
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153 static int
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154 tty_initially_selected_for_input (struct console *con)
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155 {
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156 return 1;
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157 }
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158
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159 static void
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160 free_tty_console_struct (struct console *con)
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161 {
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162 struct tty_console *tcon = (struct tty_console *) con->console_data;
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163 if (tcon && tcon->term_entry_buffer) /* allocated in term_init () */
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164 xfree (tcon->term_entry_buffer);
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165 if (tcon)
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166 xfree (tcon);
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167 }
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168
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169 static void
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170 tty_delete_console (struct console *con)
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171 {
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172 Lstream_close (XLSTREAM (CONSOLE_TTY_DATA (con)->instream));
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173 Lstream_close (XLSTREAM (CONSOLE_TTY_DATA (con)->outstream));
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174 if (!CONSOLE_TTY_DATA (con)->is_stdio)
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175 close (CONSOLE_TTY_DATA (con)->infd);
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176 if (CONSOLE_TTY_DATA (con)->controlling_terminal)
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177 {
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178 Vcontrolling_terminal = Qnil;
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179 unmunge_tty_process_group ();
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180 }
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181 free_tty_console_struct (con);
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182 }
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183
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184
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185 static struct console *
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186 decode_tty_console (Lisp_Object console)
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187 {
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188 XSETCONSOLE (console, decode_console (console));
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189 CHECK_TTY_CONSOLE (console);
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190 return XCONSOLE (console);
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191 }
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192
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193 DEFUN ("console-tty-terminal-type", Fconsole_tty_terminal_type,
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194 Sconsole_tty_terminal_type, 0, 1, 0 /*
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195 Return the terminal type of TTY console CONSOLE.
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196 */ )
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197 (console)
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198 Lisp_Object console;
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199 {
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200 return CONSOLE_TTY_DATA (decode_tty_console (console))->terminal_type;
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201 }
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202
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203 Lisp_Object
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204 tty_semi_canonicalize_console_connection (Lisp_Object connection,
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205 Error_behavior errb)
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206 {
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207 if (NILP (connection))
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208 return Vstdio_str;
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209
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210 return connection;
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211 }
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212
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213 Lisp_Object
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214 tty_canonicalize_console_connection (Lisp_Object connection,
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215 Error_behavior errb)
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216 {
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217 if (NILP (connection) || !NILP (Fequal (connection, Vstdio_str)))
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218 return Vstdio_str;
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219
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220 if (!ERRB_EQ (errb, ERROR_ME))
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221 {
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222 if (!STRINGP (connection))
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223 return Qunbound;
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224 }
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225 else
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226 CHECK_STRING (connection);
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227
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228 return Ffile_truename (connection, Qnil);
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229 }
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230
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231 Lisp_Object
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232 tty_semi_canonicalize_device_connection (Lisp_Object connection,
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233 Error_behavior errb)
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234 {
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235 return tty_semi_canonicalize_console_connection (connection, errb);
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236 }
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237
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238 Lisp_Object
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239 tty_canonicalize_device_connection (Lisp_Object connection,
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240 Error_behavior errb)
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241 {
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242 return tty_canonicalize_console_connection (connection, errb);
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243 }
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244
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245
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246 /************************************************************************/
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247 /* initialization */
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248 /************************************************************************/
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249
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250 void
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251 syms_of_console_tty (void)
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252 {
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253 defsubr (&Sconsole_tty_terminal_type);
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254 defsymbol (&Qterminal_type, "terminal-type");
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255 }
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256
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257 void
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258 console_type_create_tty (void)
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259 {
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260 INITIALIZE_CONSOLE_TYPE (tty, "tty", "console-tty-p");
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261
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262 /* console methods */
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263 CONSOLE_HAS_METHOD (tty, init_console);
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264 CONSOLE_HAS_METHOD (tty, mark_console);
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265 CONSOLE_HAS_METHOD (tty, initially_selected_for_input);
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266 CONSOLE_HAS_METHOD (tty, delete_console);
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267 CONSOLE_HAS_METHOD (tty, canonicalize_console_connection);
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268 CONSOLE_HAS_METHOD (tty, canonicalize_device_connection);
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269 CONSOLE_HAS_METHOD (tty, semi_canonicalize_console_connection);
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270 CONSOLE_HAS_METHOD (tty, semi_canonicalize_device_connection);
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271 }
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272
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273 void
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274 vars_of_console_tty (void)
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275 {
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276 Fprovide (Qtty);
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277
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278 Vstdio_str = build_string ("stdio");
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279 staticpro (&Vstdio_str);
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280 }
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