lib/libterminfo/curterm.c

   1 /* $NetBSD: curterm.c,v 1.8 2011/10/05 10:46:08 roy Exp $ */
   2
   3 /*
   4  * Copyright (c) 2009, 2011 The NetBSD Foundation, Inc.
   5  *
   6  * This code is derived from software contributed to The NetBSD Foundation
   7  * by Roy Marples.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __RCSID("$NetBSD: curterm.c,v 1.8 2011/10/05 10:46:08 roy Exp $");
  32
  33 #include <assert.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <term_private.h>
  37 #include <term.h>
  38 #include <termios.h>
  39 #include <stdio.h>
  40
  41 TERMINAL *cur_term;
  42
  43 /*
  44  * There is no standard way of getting a list of aliases for the
  45  * terminal. However, some applications such as telnet want to know this.
  46  * ncurses dumps the terminfo header into an undefined variable ttytype
  47  * and these applications then parse it to work out the aliases.
  48  * We should do the same for now, until a standard mechanism for getting
  49  * the information is available or the need for it goes away.
  50  */
  51 #define NAMESIZE        256
  52 char ttytype[NAMESIZE];
  53
  54 static const speed_t bauds[] = {
  55         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 2400, 4800, 9600,
  56         19200, 38400, 57600, 115200, 230400, 460800, 921600
  57 };
  58
  59 void
  60 _ti_setospeed(TERMINAL *term)
  61 {
  62         struct termios termios;
  63         speed_t os;
  64         size_t i;
  65
  66         _DIAGASSERT(term != NULL);
  67
  68         term->_ospeed = 0;
  69         if (tcgetattr(term->fildes, &termios) == 0) {
  70                 os = cfgetospeed(&termios);
  71                 for (i = 0; i < __arraycount(bauds); i++)
  72                         if (bauds[i] == os) {
  73                                 term->_ospeed = i;
  74                                 break;
  75                         }
  76         }
  77 }
  78
  79 TERMINAL *
  80 set_curterm(TERMINAL *nterm)
  81 {
  82         TERMINAL *oterm;
  83         size_t l, n;
  84         char *p;
  85
  86         oterm = cur_term;
  87         cur_term = nterm;
  88
  89         ospeed = 0;
  90         if (cur_term == NULL)
  91                 PC = '\0';
  92         else {
  93                 if (pad_char == NULL)
  94                         PC = '\0';
  95                 else
  96                         PC = *pad_char;
  97                 _ti_setospeed(nterm);
  98                 ospeed = nterm->_ospeed;
  99
 100                 p = ttytype;
 101                 l = sizeof(ttytype);
 102                 if ((n = strlcpy(p, nterm->name, l)) == strlen(p)) {
 103                         p += n;
 104                         l -= n;
 105                         *p++ = '|';
 106                         l--;
 107                         if (nterm->_alias  &&
 108                                 (n = strlcpy(p, nterm->_alias, l)) == strlen(p))
 109                         {
 110                                 p += n;
 111                                 l -= n;
 112                                 *p++ = '|';
 113                                 l--;
 114                         }
 115                         if (nterm->desc  &&
 116                                 (n = strlcpy(p, nterm->desc, l)) == strlen(p))
 117                         {
 118                                 p += n;
 119                                 l -= n;
 120                                 *p++ = '|';
 121                                 l--;
 122                         }
 123                         p--;
 124                 }
 125                 *p = '\0';
 126         }
 127
 128         return oterm;
 129 }
 130
 131 int
 132 del_curterm(TERMINAL *oterm)
 133 {
 134
 135         if (oterm == NULL)
 136                 return ERR;
 137         free(oterm->_area);
 138         free(oterm->strs);
 139         free(oterm->nums);
 140         free(oterm->flags);
 141         free(oterm->_userdefs);
 142         free(oterm);
 143         return OK;
 144 }
 145
 146 char *
 147 termname(void)
 148 {
 149
 150         _DIAGASSERT(cur_term != NULL);
 151         return __UNCONST(cur_term->name);
 152 }
 153
 154 static const char * nullname = '\0';
 155
 156 char *
 157 longname(void)
 158 {
 159
 160         _DIAGASSERT(cur_term != NULL);
 161         if (cur_term->desc == NULL)
 162                 return __UNCONST(nullname);
 163         return __UNCONST(cur_term->desc);
 164 }