257 lines
6.2 KiB
C
257 lines
6.2 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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static const char sccsid[] = "@(#)map.c 8.1 (Berkeley) 6/9/93";
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#endif
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#include <sys/types.h>
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#include <err.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include "extern.h"
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extern speed_t Ospeed;
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speed_t tset_baudrate(char *);
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/* Baud rate conditionals for mapping. */
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#define GT 0x01
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#define EQ 0x02
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#define LT 0x04
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#define NOT 0x08
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#define GE (GT | EQ)
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#define LE (LT | EQ)
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typedef struct map {
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struct map *next; /* Linked list of maps. */
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char *porttype; /* Port type, or "" for any. */
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char *type; /* Terminal type to select. */
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int conditional; /* Baud rate conditionals bitmask. */
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speed_t speed; /* Baud rate to compare against. */
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} MAP;
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MAP *cur, *maplist;
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/*
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* Syntax for -m:
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* [port-type][test baudrate]:terminal-type
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* The baud rate tests are: >, <, @, =, !
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*/
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void
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add_mapping(const char *port, char *arg)
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{
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MAP *mapp;
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char *copy, *p, *termp;
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copy = strdup(arg);
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mapp = malloc(sizeof(MAP));
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if (copy == NULL || mapp == NULL)
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errx(1, "malloc");
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mapp->next = NULL;
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if (maplist == NULL)
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cur = maplist = mapp;
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else {
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cur->next = mapp;
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cur = mapp;
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}
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mapp->porttype = arg;
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mapp->conditional = 0;
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arg = strpbrk(arg, "><@=!:");
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if (arg == NULL) { /* [?]term */
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mapp->type = mapp->porttype;
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mapp->porttype = NULL;
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goto done;
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}
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if (arg == mapp->porttype) /* [><@=! baud]:term */
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termp = mapp->porttype = NULL;
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else
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termp = arg;
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for (;; ++arg) /* Optional conditionals. */
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switch(*arg) {
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case '<':
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if (mapp->conditional & GT)
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goto badmopt;
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mapp->conditional |= LT;
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break;
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case '>':
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if (mapp->conditional & LT)
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goto badmopt;
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mapp->conditional |= GT;
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break;
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case '@':
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case '=': /* Not documented. */
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mapp->conditional |= EQ;
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break;
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case '!':
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mapp->conditional |= NOT;
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break;
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default:
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goto next;
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}
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next: if (*arg == ':') {
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if (mapp->conditional)
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goto badmopt;
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++arg;
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} else { /* Optional baudrate. */
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arg = index(p = arg, ':');
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if (arg == NULL)
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goto badmopt;
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*arg++ = '\0';
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mapp->speed = tset_baudrate(p);
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}
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if (*arg == '\0') /* Non-optional type. */
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goto badmopt;
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mapp->type = arg;
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/* Terminate porttype, if specified. */
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if (termp != NULL)
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*termp = '\0';
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/* If a NOT conditional, reverse the test. */
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if (mapp->conditional & NOT)
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mapp->conditional = ~mapp->conditional & (EQ | GT | LT);
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/* If user specified a port with an option flag, set it. */
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done: if (port) {
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if (mapp->porttype)
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badmopt: errx(1, "illegal -m option format: %s", copy);
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mapp->porttype = strdup(port);
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}
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#ifdef MAPDEBUG
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(void)printf("port: %s\n", mapp->porttype ? mapp->porttype : "ANY");
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(void)printf("type: %s\n", mapp->type);
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(void)printf("conditional: ");
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p = "";
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if (mapp->conditional & GT) {
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(void)printf("GT");
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p = "/";
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}
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if (mapp->conditional & EQ) {
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(void)printf("%sEQ", p);
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p = "/";
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}
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if (mapp->conditional & LT)
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(void)printf("%sLT", p);
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(void)printf("\nspeed: %d\n", mapp->speed);
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#endif
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}
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/*
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* Return the type of terminal to use for a port of type 'type', as specified
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* by the first applicable mapping in 'map'. If no mappings apply, return
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* 'type'.
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*/
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const char *
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mapped(const char *type)
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{
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MAP *mapp;
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int match;
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match = 0;
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for (mapp = maplist; mapp; mapp = mapp->next)
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if (mapp->porttype == NULL || !strcmp(mapp->porttype, type)) {
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switch (mapp->conditional) {
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case 0: /* No test specified. */
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match = 1;
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break;
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case EQ:
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match = (Ospeed == mapp->speed);
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break;
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case GE:
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match = (Ospeed >= mapp->speed);
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break;
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case GT:
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match = (Ospeed > mapp->speed);
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break;
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case LE:
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match = (Ospeed <= mapp->speed);
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break;
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case LT:
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match = (Ospeed < mapp->speed);
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break;
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}
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if (match)
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return (mapp->type);
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}
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/* No match found; return given type. */
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return (type);
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}
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typedef struct speeds {
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const char *string;
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speed_t speed;
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} SPEEDS;
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SPEEDS speeds[] = {
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{ "0", B0 },
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{ "134.5", B134 },
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{ "exta", B19200 },
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{ "extb", B38400 },
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{ NULL, 0 }
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};
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speed_t
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tset_baudrate(char *rate)
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{
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SPEEDS *sp;
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speed_t speed;
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/* The baudrate number can be preceded by a 'B', which is ignored. */
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if (*rate == 'B')
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++rate;
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for (sp = speeds; sp->string; ++sp)
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if (!strcasecmp(rate, sp->string))
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return (sp->speed);
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speed = atol(rate);
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if (speed == 0)
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errx(1, "unknown baud rate %s", rate);
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return speed;
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}
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