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- /* Generic serial interface routines
- Copyright 1992, 1993 Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "defs.h"
- #include "serial.h"
-
- /* Linked list of serial I/O handlers */
-
- static struct serial_ops *serial_ops_list = NULL;
-
- /* This is the last serial stream opened. Used by connect command. */
-
- static serial_t last_serial_opened = NULL;
-
- static struct serial_ops *
- serial_interface_lookup (name)
- char *name;
- {
- struct serial_ops *ops;
-
- for (ops = serial_ops_list; ops; ops = ops->next)
- if (strcmp (name, ops->name) == 0)
- return ops;
-
- return NULL;
- }
-
- void
- serial_add_interface(optable)
- struct serial_ops *optable;
- {
- optable->next = serial_ops_list;
- serial_ops_list = optable;
- }
-
- /* Open up a device or a network socket, depending upon the syntax of NAME. */
-
- serial_t
- serial_open (name)
- const char *name;
- {
- serial_t scb;
- struct serial_ops *ops;
-
- if (strcmp (name, "pc") == 0)
- ops = serial_interface_lookup ("pc");
- else if (strchr (name, ':'))
- ops = serial_interface_lookup ("tcp");
- else
- ops = serial_interface_lookup ("hardwire");
-
- if (!ops)
- return NULL;
-
- scb = (serial_t)xmalloc (sizeof (struct _serial_t));
-
- scb->ops = ops;
-
- scb->bufcnt = 0;
- scb->bufp = scb->buf;
-
- if (scb->ops->open(scb, name))
- {
- free (scb);
- return NULL;
- }
-
- last_serial_opened = scb;
-
- return scb;
- }
-
- serial_t
- serial_fdopen(fd)
- const int fd;
- {
- serial_t scb;
- struct serial_ops *ops;
-
- ops = serial_interface_lookup ("hardwire");
-
- if (!ops)
- return NULL;
-
- scb = (serial_t)xmalloc (sizeof (struct _serial_t));
-
- scb->ops = ops;
-
- scb->bufcnt = 0;
- scb->bufp = scb->buf;
-
- scb->fd = fd;
-
- last_serial_opened = scb;
-
- return scb;
- }
-
- void
- serial_close(scb)
- serial_t scb;
- {
- last_serial_opened = NULL;
-
- /* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you
- should fix your code instead. */
-
- if (!scb)
- return;
-
- scb->ops->close(scb);
- free(scb);
- }
-
- #if 0
- /*
- The connect command is #if 0 because I hadn't thought of an elegant
- way to wait for I/O on two serial_t's simultaneously. Two solutions
- came to mind:
-
- 1) Fork, and have have one fork handle the to user direction,
- and have the other hand the to target direction. This
- obviously won't cut it for MSDOS.
-
- 2) Use something like select. This assumes that stdin and
- the target side can both be waited on via the same
- mechanism. This may not be true for DOS, if GDB is
- talking to the target via a TCP socket.
- -grossman, 8 Jun 93
- */
-
- /* Connect the user directly to the remote system. This command acts just like
- the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
-
- static serial_t tty_desc; /* Controlling terminal */
-
- static void
- cleanup_tty(ttystate)
- serial_ttystate ttystate;
- {
- printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
- SERIAL_SET_TTY_STATE (tty_desc, ttystate);
- free (ttystate);
- SERIAL_CLOSE (tty_desc);
- }
-
- static void
- connect_command (args, fromtty)
- char *args;
- int fromtty;
- {
- int c;
- char cur_esc = 0;
- serial_ttystate ttystate;
- serial_t port_desc; /* TTY port */
-
- dont_repeat();
-
- if (args)
- fprintf_unfiltered(gdb_stderr, "This command takes no args. They have been ignored.\n");
-
- printf_unfiltered("[Entering connect mode. Use ~. or ~^D to escape]\n");
-
- tty_desc = SERIAL_FDOPEN (0);
- port_desc = last_serial_opened;
-
- ttystate = SERIAL_GET_TTY_STATE (tty_desc);
-
- SERIAL_RAW (tty_desc);
- SERIAL_RAW (port_desc);
-
- make_cleanup (cleanup_tty, ttystate);
-
- while (1)
- {
- int mask;
-
- mask = SERIAL_WAIT_2 (tty_desc, port_desc, -1);
-
- if (mask & 2)
- { /* tty input */
- char cx;
-
- while (1)
- {
- c = SERIAL_READCHAR(tty_desc, 0);
-
- if (c == SERIAL_TIMEOUT)
- break;
-
- if (c < 0)
- perror_with_name("connect");
-
- cx = c;
- SERIAL_WRITE(port_desc, &cx, 1);
-
- switch (cur_esc)
- {
- case 0:
- if (c == '\r')
- cur_esc = c;
- break;
- case '\r':
- if (c == '~')
- cur_esc = c;
- else
- cur_esc = 0;
- break;
- case '~':
- if (c == '.' || c == '\004')
- return;
- else
- cur_esc = 0;
- }
- }
- }
-
- if (mask & 1)
- { /* Port input */
- char cx;
-
- while (1)
- {
- c = SERIAL_READCHAR(port_desc, 0);
-
- if (c == SERIAL_TIMEOUT)
- break;
-
- if (c < 0)
- perror_with_name("connect");
-
- cx = c;
-
- SERIAL_WRITE(tty_desc, &cx, 1);
- }
- }
- }
- }
- #endif /* 0 */
-
- void
- _initialize_serial ()
- {
- #if 0
- add_com ("connect", class_obscure, connect_command,
- "Connect the terminal directly up to the command monitor.\n\
- Use <CR>~. or <CR>~^D to break out.");
- #endif /* 0 */
- }
-