191 lines
3.6 KiB
C
191 lines
3.6 KiB
C
/* Generic serial interface routines
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Copyright 1992, 1993 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "serial.h"
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/* Open up a device or a network socket, depending upon the syntax of NAME. */
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static struct serial_ops *serial_ops_list = NULL;
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static struct serial_ops *
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serial_interface_lookup (name)
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char *name;
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{
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struct serial_ops *ops;
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for (ops = serial_ops_list; ops; ops = ops->next)
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if (strcmp (name, ops->name) == 0)
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return ops;
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return NULL;
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}
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void
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serial_add_interface(optable)
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struct serial_ops *optable;
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{
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optable->next = serial_ops_list;
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serial_ops_list = optable;
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}
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serial_t
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serial_open(name)
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const char *name;
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{
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serial_t scb;
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struct serial_ops *ops;
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ops = serial_interface_lookup ("hardwire");
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if (!ops)
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return NULL;
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scb = (serial_t)xmalloc (sizeof (struct _serial_t));
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scb->ops = ops;
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scb->bufcnt = 0;
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scb->bufp = scb->buf;
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if (scb->ops->open(scb, name))
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{
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free (scb);
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return NULL;
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}
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return scb;
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}
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void
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serial_close(scb)
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serial_t scb;
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{
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scb->ops->close(scb);
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free(scb);
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}
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#if 0
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/* Connect the user directly to the remote system. This command acts just like
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the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
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static void
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cleanup_tty(ttystate)
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struct ttystate ttystate;
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{
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printf("\r\n[Exiting connect mode]\r\n");
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serial_restore(0, &ttystate);
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}
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static void
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connect_command (args, fromtty)
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char *args;
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int fromtty;
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{
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fd_set readfds;
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int numfds;
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int c;
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char cur_esc = 0;
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static struct ttystate ttystate;
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dont_repeat();
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if (desc < 0)
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error("target not open.");
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if (args)
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fprintf("This command takes no args. They have been ignored.\n");
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printf("[Entering connect mode. Use ~. or ~^D to escape]\n");
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serial_raw(0, &ttystate);
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make_cleanup(cleanup_tty, &ttystate);
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FD_ZERO(&readfds);
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while (1)
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{
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do
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{
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FD_SET(0, &readfds);
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FD_SET(desc, &readfds);
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numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0);
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}
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while (numfds == 0);
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if (numfds < 0)
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perror_with_name("select");
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if (FD_ISSET(0, &readfds))
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{ /* tty input, send to stdebug */
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char cx;
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c = serial_readchar(-1);
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if (c < 0)
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perror_with_name("connect");
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cx = c;
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serial_write(&cx, 1);
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switch (cur_esc)
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{
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case 0:
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if (c == '\r')
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cur_esc = c;
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break;
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case '\r':
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if (c == '~')
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cur_esc = c;
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else
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cur_esc = 0;
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break;
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case '~':
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if (c == '.' || c == '\004')
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return;
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else
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cur_esc = 0;
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}
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}
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if (FD_ISSET(desc, &readfds))
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{
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while (1)
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{
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c = serial_readchar(-1);
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if (c < 0)
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break;
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putchar(c);
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}
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fflush(stdout);
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}
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}
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}
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#endif
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#if 0
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void
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_initialize_serial ()
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{
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add_com ("connect", class_obscure, connect_command,
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"Connect the terminal directly up to the command monitor.\n\
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Use <CR>~. or <CR>~^D to break out.");
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}
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#endif
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