1 /* Generic serial interface routines
2 Copyright 1992, 1993 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 /* Linked list of serial I/O handlers */
25 static struct serial_ops *serial_ops_list = NULL;
27 /* This is the last serial stream opened. Used by connect command. */
29 static serial_t last_serial_opened = NULL;
31 static struct serial_ops *
32 serial_interface_lookup (name)
35 struct serial_ops *ops;
37 for (ops = serial_ops_list; ops; ops = ops->next)
38 if (strcmp (name, ops->name) == 0)
45 serial_add_interface(optable)
46 struct serial_ops *optable;
48 optable->next = serial_ops_list;
49 serial_ops_list = optable;
52 /* Open up a device or a network socket, depending upon the syntax of NAME. */
59 struct serial_ops *ops;
61 if (strchr (name, ':'))
62 ops = serial_interface_lookup ("tcp");
64 ops = serial_interface_lookup ("hardwire");
69 scb = (serial_t)xmalloc (sizeof (struct _serial_t));
76 if (scb->ops->open(scb, name))
82 last_serial_opened = scb;
92 struct serial_ops *ops;
94 ops = serial_interface_lookup ("hardwire");
99 scb = (serial_t)xmalloc (sizeof (struct _serial_t));
104 scb->bufp = scb->buf;
108 last_serial_opened = scb;
117 last_serial_opened = NULL;
121 scb->ops->close(scb);
128 The connect command is #if 0 because I hadn't thought of an elegant
129 way to wait for I/O on two serial_t's simultaneously. Two solutions
132 1) Fork, and have have one fork handle the to user direction,
133 and have the other hand the to target direction. This
134 obviously won't cut it for MSDOS.
136 2) Use something like select. This assumes that stdin and
137 the target side can both be waited on via the same
138 mechanism. This may not be true for DOS, if GDB is
139 talking to the target via a TCP socket.
143 /* Connect the user directly to the remote system. This command acts just like
144 the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
146 static serial_t tty_desc; /* Controlling terminal */
149 cleanup_tty(ttystate)
150 serial_ttystate ttystate;
152 printf ("\r\n[Exiting connect mode]\r\n");
153 SERIAL_SET_TTY_STATE (tty_desc, ttystate);
155 SERIAL_CLOSE (tty_desc);
159 connect_command (args, fromtty)
165 serial_ttystate ttystate;
166 serial_t port_desc; /* TTY port */
171 fprintf(stderr, "This command takes no args. They have been ignored.\n");
173 printf("[Entering connect mode. Use ~. or ~^D to escape]\n");
175 tty_desc = SERIAL_FDOPEN (0);
176 port_desc = last_serial_opened;
178 ttystate = SERIAL_GET_TTY_STATE (tty_desc);
180 SERIAL_RAW (tty_desc);
181 SERIAL_RAW (port_desc);
183 make_cleanup (cleanup_tty, ttystate);
189 mask = SERIAL_WAIT_2 (tty_desc, port_desc, -1);
197 c = SERIAL_READCHAR(tty_desc, 0);
199 if (c == SERIAL_TIMEOUT)
203 perror_with_name("connect");
206 SERIAL_WRITE(port_desc, &cx, 1);
221 if (c == '.' || c == '\004')
235 c = SERIAL_READCHAR(port_desc, 0);
237 if (c == SERIAL_TIMEOUT)
241 perror_with_name("connect");
245 SERIAL_WRITE(tty_desc, &cx, 1);
252 _initialize_serial ()
254 add_com ("connect", class_obscure, connect_command,
255 "Connect the terminal directly up to the command monitor.\n\
256 Use <CR>~. or <CR>~^D to break out.");