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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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30
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45 Lisp_Object Qcontrolling_process;
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0
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46
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12
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47 extern Lisp_Object Vstdio_str; /* in console-stream.c */
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0
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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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30
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66 Lisp_Object tty = CONSOLE_CONNECTION (con);
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67 Lisp_Object terminal_type = Qnil, controlling_process = Qnil;
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0
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68 int infd, outfd;
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30
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69 struct gcpro gcpro1, gcpro2;
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0
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70
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30
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71 GCPRO2 (terminal_type, controlling_process);
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0
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72
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73 terminal_type = Fplist_get (props, Qterminal_type, Qnil);
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30
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74 controlling_process = Fplist_get(props, Qcontrolling_process, Qnil);
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75
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0
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76 /* Determine the terminal type */
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77
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78 if (!NILP (terminal_type))
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79 CHECK_STRING (terminal_type);
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80 else
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81 {
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82 char *temp_type = (char *) getenv ("TERM");
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83
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84 if (!temp_type)
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85 {
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86 error ("Cannot determine terminal type");
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87 }
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88 else
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89 terminal_type = build_string (temp_type);
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90 }
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91
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30
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92 /* Determine the controlling process */
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93 if (!NILP (controlling_process))
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94 CHECK_INT (controlling_process);
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95
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0
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96 /* Open the specified console */
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97
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98 allocate_tty_console_struct (con);
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99 if (!NILP (Fequal (tty, Vstdio_str)))
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100 {
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101 infd = fileno (stdin);
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102 outfd = fileno (stdout);
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103 CONSOLE_TTY_DATA (con)->is_stdio = 1;
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104 }
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105 else
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106 {
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107 infd = outfd = open ((char *) XSTRING_DATA (tty), O_RDWR);
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108 if (infd < 0)
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109 error ("Unable to open tty %s", XSTRING_DATA (tty));
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110 CONSOLE_TTY_DATA (con)->is_stdio = 0;
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111 }
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112
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113 CONSOLE_TTY_DATA (con)->infd = infd;
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114 CONSOLE_TTY_DATA (con)->outfd = outfd;
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115 CONSOLE_TTY_DATA (con)->instream = make_filedesc_input_stream (infd, 0,
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116 -1, 0);
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117 CONSOLE_TTY_DATA (con)->outstream = make_filedesc_output_stream (outfd, 0,
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118 -1, 0);
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119 CONSOLE_TTY_DATA (con)->terminal_type = terminal_type;
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30
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120 CONSOLE_TTY_DATA (con)->controlling_process = controlling_process;
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121 if (NILP (CONSOLE_NAME (con)))
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122 CONSOLE_NAME (con) = Ffile_name_nondirectory (tty);
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123 {
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124 int tty_pg;
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125 int controlling_tty_pg;
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126 int cfd;
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127
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128 /* OK, the only sure-fire way I can think of to determine
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129 whether a particular TTY is our controlling TTY is to check
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130 if it has the same foreground process group as our controlling
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131 TTY. This is OK because a process group can never simultaneously
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132 be the foreground process group of two TTY's (in that case it
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133 would have two controlling TTY's, which is not allowed). */
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134
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135 EMACS_GET_TTY_PROCESS_GROUP (infd, &tty_pg);
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136 cfd = open ("/dev/tty", O_RDWR, 0);
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137 EMACS_GET_TTY_PROCESS_GROUP (cfd, &controlling_tty_pg);
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138 close (cfd);
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139 if (tty_pg == controlling_tty_pg)
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140 {
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141 CONSOLE_TTY_DATA (con)->controlling_terminal = 1;
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142 XSETCONSOLE (Vcontrolling_terminal, con);
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143 munge_tty_process_group ();
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144 }
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145 else
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146 CONSOLE_TTY_DATA (con)->controlling_terminal = 0;
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147 }
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148
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149 UNGCPRO;
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150 }
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151
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152 static void
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153 tty_mark_console (struct console *con, void (*markobj) (Lisp_Object))
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154 {
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155 ((markobj) (CONSOLE_TTY_DATA (con)->terminal_type));
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156 ((markobj) (CONSOLE_TTY_DATA (con)->instream));
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157 ((markobj) (CONSOLE_TTY_DATA (con)->outstream));
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158 }
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159
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160 static int
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161 tty_initially_selected_for_input (struct console *con)
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162 {
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163 return 1;
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164 }
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165
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166 static void
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167 free_tty_console_struct (struct console *con)
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168 {
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169 struct tty_console *tcon = (struct tty_console *) con->console_data;
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170 if (tcon && tcon->term_entry_buffer) /* allocated in term_init () */
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171 xfree (tcon->term_entry_buffer);
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172 if (tcon)
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173 xfree (tcon);
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174 }
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175
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176 static void
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177 tty_delete_console (struct console *con)
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178 {
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179 Lstream_close (XLSTREAM (CONSOLE_TTY_DATA (con)->instream));
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180 Lstream_close (XLSTREAM (CONSOLE_TTY_DATA (con)->outstream));
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181 if (!CONSOLE_TTY_DATA (con)->is_stdio)
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182 close (CONSOLE_TTY_DATA (con)->infd);
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183 if (CONSOLE_TTY_DATA (con)->controlling_terminal)
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184 {
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185 Vcontrolling_terminal = Qnil;
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186 unmunge_tty_process_group ();
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187 }
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188 free_tty_console_struct (con);
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189 }
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190
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191
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192 static struct console *
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193 decode_tty_console (Lisp_Object console)
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194 {
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195 XSETCONSOLE (console, decode_console (console));
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196 CHECK_TTY_CONSOLE (console);
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197 return XCONSOLE (console);
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198 }
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199
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200 DEFUN ("console-tty-terminal-type", Fconsole_tty_terminal_type, 0, 1, 0, /*
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201 Return the terminal type of TTY console CONSOLE.
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202 */
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203 (console))
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204 {
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205 return CONSOLE_TTY_DATA (decode_tty_console (console))->terminal_type;
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206 }
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207
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208 DEFUN ("console-tty-controlling-process", Fconsole_tty_controlling_process, 0, 1, 0, /*
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209 Return the controlling process of TTY console CONSOLE.
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210 */
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211 (console))
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212 {
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213 return CONSOLE_TTY_DATA (decode_tty_console (console))->controlling_process;
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214 }
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215
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216 extern Lisp_Object stream_semi_canonicalize_console_connection(Lisp_Object,
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217 Error_behavior);
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218 Lisp_Object
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219 tty_semi_canonicalize_console_connection (Lisp_Object connection,
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220 Error_behavior errb)
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221 {
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222 return stream_semi_canonicalize_console_connection (connection, errb);
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223 }
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224
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225 extern Lisp_Object stream_canonicalize_console_connection(Lisp_Object,
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226 Error_behavior);
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227 Lisp_Object
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228 tty_canonicalize_console_connection (Lisp_Object connection,
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229 Error_behavior errb)
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230 {
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231 return stream_canonicalize_console_connection (connection, errb);
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232 }
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233
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234 Lisp_Object
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235 tty_semi_canonicalize_device_connection (Lisp_Object connection,
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236 Error_behavior errb)
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237 {
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238 return stream_semi_canonicalize_console_connection (connection, errb);
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239 }
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240
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241 Lisp_Object
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242 tty_canonicalize_device_connection (Lisp_Object connection,
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243 Error_behavior errb)
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244 {
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245 return stream_canonicalize_console_connection (connection, errb);
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246 }
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247
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248
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249 /************************************************************************/
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250 /* initialization */
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251 /************************************************************************/
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252
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253 void
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254 syms_of_console_tty (void)
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255 {
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256 DEFSUBR (Fconsole_tty_terminal_type);
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257 DEFSUBR (Fconsole_tty_controlling_process);
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258 defsymbol (&Qterminal_type, "terminal-type");
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259 defsymbol (&Qcontrolling_process, "controlling-process");
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260 }
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261
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262 void
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263 console_type_create_tty (void)
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264 {
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265 INITIALIZE_CONSOLE_TYPE (tty, "tty", "console-tty-p");
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266
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267 /* console methods */
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268 CONSOLE_HAS_METHOD (tty, init_console);
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269 CONSOLE_HAS_METHOD (tty, mark_console);
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270 CONSOLE_HAS_METHOD (tty, initially_selected_for_input);
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271 CONSOLE_HAS_METHOD (tty, delete_console);
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272 CONSOLE_HAS_METHOD (tty, canonicalize_console_connection);
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273 CONSOLE_HAS_METHOD (tty, canonicalize_device_connection);
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274 CONSOLE_HAS_METHOD (tty, semi_canonicalize_console_connection);
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275 CONSOLE_HAS_METHOD (tty, semi_canonicalize_device_connection);
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276 }
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277
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278 void
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279 vars_of_console_tty (void)
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280 {
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281 Fprovide (Qtty);
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282 }
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