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 (strcmp (name, "pc") == 0)
62 ops = serial_interface_lookup ("pc");
63 else if (strchr (name, ':'))
64 ops = serial_interface_lookup ("tcp");
66 ops = serial_interface_lookup ("hardwire");
71 scb = (serial_t)xmalloc (sizeof (struct _serial_t));
78 if (scb->ops->open(scb, name))
84 last_serial_opened = scb;
94 struct serial_ops *ops;
96 ops = serial_interface_lookup ("hardwire");
101 scb = (serial_t)xmalloc (sizeof (struct _serial_t));
106 scb->bufp = scb->buf;
110 last_serial_opened = scb;
119 last_serial_opened = NULL;
121 /* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you
122 should fix your code instead. */
127 scb->ops->close(scb);
133 The connect command is #if 0 because I hadn't thought of an elegant
134 way to wait for I/O on two serial_t's simultaneously. Two solutions
137 1) Fork, and have have one fork handle the to user direction,
138 and have the other hand the to target direction. This
139 obviously won't cut it for MSDOS.
141 2) Use something like select. This assumes that stdin and
142 the target side can both be waited on via the same
143 mechanism. This may not be true for DOS, if GDB is
144 talking to the target via a TCP socket.
148 /* Connect the user directly to the remote system. This command acts just like
149 the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
151 static serial_t tty_desc; /* Controlling terminal */
154 cleanup_tty(ttystate)
155 serial_ttystate ttystate;
157 printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
158 SERIAL_SET_TTY_STATE (tty_desc, ttystate);
160 SERIAL_CLOSE (tty_desc);
164 connect_command (args, fromtty)
170 serial_ttystate ttystate;
171 serial_t port_desc; /* TTY port */
176 fprintf_unfiltered(gdb_stderr, "This command takes no args. They have been ignored.\n");
178 printf_unfiltered("[Entering connect mode. Use ~. or ~^D to escape]\n");
180 tty_desc = SERIAL_FDOPEN (0);
181 port_desc = last_serial_opened;
183 ttystate = SERIAL_GET_TTY_STATE (tty_desc);
185 SERIAL_RAW (tty_desc);
186 SERIAL_RAW (port_desc);
188 make_cleanup (cleanup_tty, ttystate);
194 mask = SERIAL_WAIT_2 (tty_desc, port_desc, -1);
202 c = SERIAL_READCHAR(tty_desc, 0);
204 if (c == SERIAL_TIMEOUT)
208 perror_with_name("connect");
211 SERIAL_WRITE(port_desc, &cx, 1);
226 if (c == '.' || c == '\004')
240 c = SERIAL_READCHAR(port_desc, 0);
242 if (c == SERIAL_TIMEOUT)
246 perror_with_name("connect");
250 SERIAL_WRITE(tty_desc, &cx, 1);
258 _initialize_serial ()
261 add_com ("connect", class_obscure, connect_command,
262 "Connect the terminal directly up to the command monitor.\n\
263 Use <CR>~. or <CR>~^D to break out.");