1 /* $NetBSD: cchar.c,v 1.14 2003/06/16 17:22:00 perry 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)cchar.c 8.5 (Berkeley) 4/2/94"; 40 #else 41 __RCSID("$NetBSD: cchar.c,v 1.14 2003/06/16 17:22:00 perry Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 47 #include <err.h> 48 #include <limits.h> 49 #include <stddef.h> 50 #include <stdlib.h> 51 #include <string.h> 52 53 #include "stty.h" 54 #include "extern.h" 55 56 /* 57 * Special control characters. 58 * 59 * Cchars1 are the standard names, cchars2 are the old aliases. 60 * The first are displayed, but both are recognized on the 61 * command line. 62 */ 63 const struct cchar cchars1[] = { 64 { "discard", VDISCARD, CDISCARD }, 65 { "dsusp", VDSUSP, CDSUSP }, 66 { "eof", VEOF, CEOF }, 67 { "eol", VEOL, CEOL }, 68 { "eol2", VEOL2, CEOL }, 69 { "erase", VERASE, CERASE }, 70 { "intr", VINTR, CINTR }, 71 { "kill", VKILL, CKILL }, 72 { "lnext", VLNEXT, CLNEXT }, 73 { "min", VMIN, CMIN }, 74 { "quit", VQUIT, CQUIT }, 75 { "reprint", VREPRINT, CREPRINT }, 76 { "start", VSTART, CSTART }, 77 { "status", VSTATUS, CSTATUS }, 78 { "stop", VSTOP, CSTOP }, 79 { "susp", VSUSP, CSUSP }, 80 { "time", VTIME, CTIME }, 81 { "werase", VWERASE, CWERASE }, 82 { NULL }, 83 }; 84 85 const struct cchar cchars2[] = { 86 { "brk", VEOL, CEOL }, 87 { "flush", VDISCARD, CDISCARD }, 88 { "rprnt", VREPRINT, CREPRINT }, 89 { NULL }, 90 }; 91 92 static int c_cchar(const void *, const void *); 93 94 static int 95 c_cchar(const void *a, const void *b) 96 { 97 return (strcmp(((const struct cchar *)a)->name, 98 ((const struct cchar *)b)->name)); 99 } 100 101 int 102 csearch(char ***argvp, struct info *ip) 103 { 104 struct cchar *cp, tmp; 105 long val; 106 char *arg, *ep, *name; 107 108 name = **argvp; 109 110 tmp.name = name; 111 if (!(cp = (struct cchar *)bsearch(&tmp, cchars1, 112 sizeof(cchars1)/sizeof(cchars1[0]) - 1, sizeof(cchars1[0]), 113 c_cchar)) && 114 !(cp = (struct cchar *)bsearch(&tmp, cchars2, 115 sizeof(cchars2)/sizeof(cchars2[0]) - 1, sizeof(cchars2[0]), 116 c_cchar))) 117 return (0); 118 119 arg = *++*argvp; 120 if (!arg) { 121 warnx("option requires an argument -- %s", name); 122 usage(); 123 } 124 125 #define CHK(s) (*arg == s[0] && !strcmp(arg, s)) 126 if (CHK("undef") || CHK("<undef>")) 127 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE; 128 else if (cp->sub == VMIN || cp->sub == VTIME) { 129 val = strtol(arg, &ep, 10); 130 if (val == _POSIX_VDISABLE) { 131 warnx("value of %ld would disable the option -- %s", 132 val, name); 133 usage(); 134 } 135 if (val > UCHAR_MAX) { 136 warnx("maximum option value is %d -- %s", 137 UCHAR_MAX, name); 138 usage(); 139 } 140 if (*ep != '\0') { 141 warnx("option requires a numeric argument -- %s", name); 142 usage(); 143 } 144 ip->t.c_cc[cp->sub] = (cc_t)val; 145 } else if (arg[0] == '^') 146 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 : 147 (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037; 148 else 149 ip->t.c_cc[cp->sub] = arg[0]; 150 ip->set = 1; 151 return (1); 152 } 153