| 1 | /* Generic serial interface routines |
| 2 | Copyright 1992, 1993 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 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. |
| 10 | |
| 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. |
| 15 | |
| 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. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "serial.h" |
| 22 | |
| 23 | /* Open up a device or a network socket, depending upon the syntax of NAME. */ |
| 24 | |
| 25 | static struct serial_ops *serial_ops_list = NULL; |
| 26 | |
| 27 | static struct serial_ops * |
| 28 | serial_interface_lookup (name) |
| 29 | char *name; |
| 30 | { |
| 31 | struct serial_ops *ops; |
| 32 | |
| 33 | for (ops = serial_ops_list; ops; ops = ops->next) |
| 34 | if (strcmp (name, ops->name) == 0) |
| 35 | return ops; |
| 36 | |
| 37 | return NULL; |
| 38 | } |
| 39 | |
| 40 | void |
| 41 | serial_add_interface(optable) |
| 42 | struct serial_ops *optable; |
| 43 | { |
| 44 | optable->next = serial_ops_list; |
| 45 | serial_ops_list = optable; |
| 46 | } |
| 47 | |
| 48 | serial_t |
| 49 | serial_open(name) |
| 50 | const char *name; |
| 51 | { |
| 52 | serial_t scb; |
| 53 | struct serial_ops *ops; |
| 54 | |
| 55 | ops = serial_interface_lookup ("hardwire"); |
| 56 | |
| 57 | if (!ops) |
| 58 | return NULL; |
| 59 | |
| 60 | scb = (serial_t)xmalloc (sizeof (struct _serial_t)); |
| 61 | |
| 62 | scb->ops = ops; |
| 63 | |
| 64 | scb->bufcnt = 0; |
| 65 | scb->bufp = scb->buf; |
| 66 | |
| 67 | if (scb->ops->open(scb, name)) |
| 68 | { |
| 69 | free (scb); |
| 70 | return NULL; |
| 71 | } |
| 72 | |
| 73 | return scb; |
| 74 | } |
| 75 | |
| 76 | void |
| 77 | serial_close(scb) |
| 78 | serial_t scb; |
| 79 | { |
| 80 | scb->ops->close(scb); |
| 81 | |
| 82 | free(scb); |
| 83 | } |
| 84 | |
| 85 | #if 0 |
| 86 | /* Connect the user directly to the remote system. This command acts just like |
| 87 | the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */ |
| 88 | |
| 89 | static void |
| 90 | cleanup_tty(ttystate) |
| 91 | struct ttystate ttystate; |
| 92 | { |
| 93 | printf("\r\n[Exiting connect mode]\r\n"); |
| 94 | serial_restore(0, &ttystate); |
| 95 | } |
| 96 | |
| 97 | static void |
| 98 | connect_command (args, fromtty) |
| 99 | char *args; |
| 100 | int fromtty; |
| 101 | { |
| 102 | fd_set readfds; |
| 103 | int numfds; |
| 104 | int c; |
| 105 | char cur_esc = 0; |
| 106 | static struct ttystate ttystate; |
| 107 | |
| 108 | dont_repeat(); |
| 109 | |
| 110 | if (desc < 0) |
| 111 | error("target not open."); |
| 112 | |
| 113 | if (args) |
| 114 | fprintf("This command takes no args. They have been ignored.\n"); |
| 115 | |
| 116 | printf("[Entering connect mode. Use ~. or ~^D to escape]\n"); |
| 117 | |
| 118 | serial_raw(0, &ttystate); |
| 119 | |
| 120 | make_cleanup(cleanup_tty, &ttystate); |
| 121 | |
| 122 | FD_ZERO(&readfds); |
| 123 | |
| 124 | while (1) |
| 125 | { |
| 126 | do |
| 127 | { |
| 128 | FD_SET(0, &readfds); |
| 129 | FD_SET(desc, &readfds); |
| 130 | numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0); |
| 131 | } |
| 132 | while (numfds == 0); |
| 133 | |
| 134 | if (numfds < 0) |
| 135 | perror_with_name("select"); |
| 136 | |
| 137 | if (FD_ISSET(0, &readfds)) |
| 138 | { /* tty input, send to stdebug */ |
| 139 | char cx; |
| 140 | |
| 141 | c = serial_readchar(-1); |
| 142 | if (c < 0) |
| 143 | perror_with_name("connect"); |
| 144 | |
| 145 | cx = c; |
| 146 | serial_write(&cx, 1); |
| 147 | switch (cur_esc) |
| 148 | { |
| 149 | case 0: |
| 150 | if (c == '\r') |
| 151 | cur_esc = c; |
| 152 | break; |
| 153 | case '\r': |
| 154 | if (c == '~') |
| 155 | cur_esc = c; |
| 156 | else |
| 157 | cur_esc = 0; |
| 158 | break; |
| 159 | case '~': |
| 160 | if (c == '.' || c == '\004') |
| 161 | return; |
| 162 | else |
| 163 | cur_esc = 0; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | if (FD_ISSET(desc, &readfds)) |
| 168 | { |
| 169 | while (1) |
| 170 | { |
| 171 | c = serial_readchar(-1); |
| 172 | if (c < 0) |
| 173 | break; |
| 174 | putchar(c); |
| 175 | } |
| 176 | fflush(stdout); |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | #endif |
| 181 | |
| 182 | #if 0 |
| 183 | void |
| 184 | _initialize_serial () |
| 185 | { |
| 186 | add_com ("connect", class_obscure, connect_command, |
| 187 | "Connect the terminal directly up to the command monitor.\n\ |
| 188 | Use <CR>~. or <CR>~^D to break out."); |
| 189 | } |
| 190 | #endif |