bin/stty/cchar.c

   1 /* $NetBSD: cchar.c,v 1.15 2003/08/07 09:05:41 agc Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)cchar.c     8.5 (Berkeley) 4/2/94";
  36 #else
  37 __RCSID("$NetBSD: cchar.c,v 1.15 2003/08/07 09:05:41 agc Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include <sys/types.h>
  42
  43 #include <err.h>
  44 #include <limits.h>
  45 #include <stddef.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48
  49 #include "stty.h"
  50 #include "extern.h"
  51
  52 /*
  53  * Special control characters.
  54  *
  55  * Cchars1 are the standard names, cchars2 are the old aliases.
  56  * The first are displayed, but both are recognized on the
  57  * command line.
  58  */
  59 const struct cchar cchars1[] = {
  60         { "discard",    VDISCARD,       CDISCARD },
  61         { "dsusp",      VDSUSP,         CDSUSP },
  62         { "eof",        VEOF,           CEOF },
  63         { "eol",        VEOL,           CEOL },
  64         { "eol2",       VEOL2,          CEOL },
  65         { "erase",      VERASE,         CERASE },
  66         { "intr",       VINTR,          CINTR },
  67         { "kill",       VKILL,          CKILL },
  68         { "lnext",      VLNEXT,         CLNEXT },
  69         { "min",        VMIN,           CMIN },
  70         { "quit",       VQUIT,          CQUIT },
  71         { "reprint",    VREPRINT,       CREPRINT },
  72         { "start",      VSTART,         CSTART },
  73         { "status",     VSTATUS,        CSTATUS },
  74         { "stop",       VSTOP,          CSTOP },
  75         { "susp",       VSUSP,          CSUSP },
  76         { "time",       VTIME,          CTIME },
  77         { "werase",     VWERASE,        CWERASE },
  78         { .name = NULL },
  79 };
  80
  81 const struct cchar cchars2[] = {
  82         { "brk",        VEOL,           CEOL },
  83         { "flush",      VDISCARD,       CDISCARD },
  84         { "rprnt",      VREPRINT,       CREPRINT },
  85         { .name = NULL },
  86 };
  87
  88 static int c_cchar(const void *, const void *);
  89
  90 static int
  91 c_cchar(const void *a, const void *b)
  92 {
  93         return (strcmp(((const struct cchar *)a)->name,
  94             ((const struct cchar *)b)->name));
  95 }
  96
  97 int
  98 csearch(char ***argvp, struct info *ip)
  99 {
 100         struct cchar *cp, tmp;
 101         long val;
 102         char *arg, *ep, *name;
 103
 104         name = **argvp;
 105
 106         tmp.name = name;
 107         if (!(cp = (struct cchar *)bsearch(&tmp, cchars1,
 108             sizeof(cchars1)/sizeof(cchars1[0]) - 1, sizeof(cchars1[0]),
 109             c_cchar)) &&
 110             !(cp = (struct cchar *)bsearch(&tmp, cchars2,
 111             sizeof(cchars2)/sizeof(cchars2[0]) - 1, sizeof(cchars2[0]),
 112             c_cchar)))
 113                 return (0);
 114
 115         arg = *++*argvp;
 116         if (!arg) {
 117                 warnx("option requires an argument -- %s", name);
 118                 usage();
 119         }
 120
 121 #define CHK(s)  (*arg == s[0] && !strcmp(arg, s))
 122         if (CHK("undef") || CHK("<undef>"))
 123                 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE;
 124         else if (cp->sub == VMIN || cp->sub == VTIME) {
 125                 val = strtol(arg, &ep, 10);
 126                 if (val == _POSIX_VDISABLE) {
 127                         warnx("value of %ld would disable the option -- %s",
 128                             val, name);
 129                         usage();
 130                 }
 131                 if (val > UCHAR_MAX) {
 132                         warnx("maximum option value is %d -- %s",
 133                             UCHAR_MAX, name);
 134                         usage();
 135                 }
 136                 if (*ep != '\0') {
 137                         warnx("option requires a numeric argument -- %s", name);
 138                         usage();
 139                 }
 140                 ip->t.c_cc[cp->sub] = (cc_t)val;
 141         } else if (arg[0] == '^')
 142                 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 :
 143                     (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037;
 144         else
 145                 ip->t.c_cc[cp->sub] = arg[0];
 146         ip->set = 1;
 147         return (1);
 148 }