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cchar.c revision 1.1 
      1 /*-
      2  * Copyright (c) 1991 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)cchar.c	5.4 (Berkeley) 6/10/91";
     36 #endif /* not lint */
     37 
     38 #include <sys/types.h>
     39 #include <stddef.h>
     40 #include <stdlib.h>
     41 #include <string.h>
     42 #include "stty.h"
     43 #include "extern.h"
     44 
     45 /*
     46  * Special control characters.
     47  *
     48  * Cchars1 are the standard names, cchars2 are the old aliases.
     49  * The first are displayed, but both are recognized on the
     50  * command line.
     51  */
     52 struct cchar cchars1[] = {
     53 	"discard",	VDISCARD, 	CDISCARD,
     54 	"dsusp", 	VDSUSP,		CDSUSP,
     55 	"eof",		VEOF,		CEOF,
     56 	"eol",		VEOL,		CEOL,
     57 	"eol2",		VEOL2,		CEOL,
     58 	"erase",	VERASE,		CERASE,
     59 	"intr",		VINTR,		CINTR,
     60 	"kill",		VKILL,		CKILL,
     61 	"lnext",	VLNEXT,		CLNEXT,
     62 	"quit",		VQUIT,		CQUIT,
     63 	"reprint",	VREPRINT, 	CREPRINT,
     64 	"start",	VSTART,		CSTART,
     65 	"status",	VSTATUS, 	CSTATUS,
     66 	"stop",		VSTOP,		CSTOP,
     67 	"susp",		VSUSP,		CSUSP,
     68 	"werase",	VWERASE,	CWERASE,
     69 	NULL,
     70 };
     71 
     72 struct cchar cchars2[] = {
     73 	"brk",		VEOL,		CEOL,
     74 	"flush",	VDISCARD, 	CDISCARD,
     75 	"rprnt",	VREPRINT, 	CREPRINT,
     76 	"xoff",		VSTOP,		CSTOP,
     77 	"xon",		VSTART,		CSTART,
     78 	NULL,
     79 };
     80 
     81 csearch(argvp, ip)
     82 	char ***argvp;
     83 	struct info *ip;
     84 {
     85 	extern char *usage;
     86 	register struct cchar *cp;
     87 	struct cchar tmp;
     88 	char *arg, *name;
     89 	static int c_cchar __P((const void *, const void *));
     90 
     91 	name = **argvp;
     92 
     93 	tmp.name = name;
     94 	if (!(cp = (struct cchar *)bsearch(&tmp, cchars1,
     95 	    sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar),
     96 	    c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars1,
     97 	    sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar),
     98 	    c_cchar)))
     99 		return(0);
    100 
    101 	arg = *++*argvp;
    102 	if (!arg)
    103 		err("option requires an argument -- %s\n%s", name, usage);
    104 
    105 #define CHK(s)  (*name == s[0] && !strcmp(name, s))
    106 	if (CHK("undef") || CHK("<undef>"))
    107 		ip->t.c_cc[cp->sub] = _POSIX_VDISABLE;
    108 	else if (arg[0] == '^')
    109 		ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 :
    110 		    (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037;
    111 	else
    112 		ip->t.c_cc[cp->sub] = arg[0];
    113 	ip->set = 1;
    114 	return(1);
    115 }
    116 
    117 static
    118 c_cchar(a, b)
    119         const void *a, *b;
    120 {
    121         return(strcmp(((struct cchar *)a)->name, ((struct cchar *)b)->name));
    122 }
    123