1 /*- 2 * Copyright (c) 1991, 1993, 1994 3 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)cchar.c 8.5 (Berkeley) 4/2/94 30 * $FreeBSD: src/bin/stty/cchar.c,v 1.9.2.2 2001/07/04 22:40:00 kris Exp $ 31 * $DragonFly: src/bin/stty/cchar.c,v 1.5 2003/10/13 21:24:26 dillon Exp $ 32 */ 33 34 #include <sys/types.h> 35 36 #include <err.h> 37 #include <limits.h> 38 #include <stddef.h> 39 #include <stdlib.h> 40 #include <string.h> 41 42 #include "stty.h" 43 #include "extern.h" 44 45 static int c_cchar (const void *, const void *); 46 47 /* 48 * Special control characters. 49 * 50 * Cchars1 are the standard names, cchars2 are the old aliases. 51 * The first are displayed, but both are recognized on the 52 * command line. 53 */ 54 struct cchar cchars1[] = { 55 { "ckpt", VCHECKPT, CCHECKPT }, 56 { "discard", VDISCARD, CDISCARD }, 57 { "dsusp", VDSUSP, CDSUSP }, 58 { "eof", VEOF, CEOF }, 59 { "eol", VEOL, CEOL }, 60 { "eol2", VEOL2, CEOL }, 61 { "erase", VERASE, CERASE }, 62 { "erase2", VERASE2, CERASE2 }, 63 { "intr", VINTR, CINTR }, 64 { "kill", VKILL, CKILL }, 65 { "lnext", VLNEXT, CLNEXT }, 66 { "min", VMIN, CMIN }, 67 { "quit", VQUIT, CQUIT }, 68 { "reprint", VREPRINT, CREPRINT }, 69 { "start", VSTART, CSTART }, 70 { "status", VSTATUS, CSTATUS }, 71 { "stop", VSTOP, CSTOP }, 72 { "susp", VSUSP, CSUSP }, 73 { "time", VTIME, CTIME }, 74 { "werase", VWERASE, CWERASE }, 75 { NULL, 0, 0}, 76 }; 77 78 struct cchar cchars2[] = { 79 { "brk", VEOL, CEOL }, 80 { "flush", VDISCARD, CDISCARD }, 81 { "rprnt", VREPRINT, CREPRINT }, 82 { NULL, 0, 0 }, 83 }; 84 85 static int 86 c_cchar(const void *a, const void *b) 87 { 88 89 return (strcmp(((const struct cchar *)a)->name, ((const struct cchar *)b)->name)); 90 } 91 92 int 93 csearch(char ***argvp, struct info *ip) 94 { 95 struct cchar *cp, tmp; 96 long val; 97 char *arg, *ep, *name; 98 99 name = **argvp; 100 101 tmp.name = name; 102 if (!(cp = (struct cchar *)bsearch(&tmp, cchars1, 103 sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar), 104 c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars2, 105 sizeof(cchars2)/sizeof(struct cchar) - 1, sizeof(struct cchar), 106 c_cchar))) 107 return (0); 108 109 arg = *++*argvp; 110 if (!arg) { 111 warnx("option requires an argument -- %s", name); 112 usage(); 113 } 114 115 #define CHK(s) (*arg == s[0] && !strcmp(arg, s)) 116 if (CHK("undef") || CHK("<undef>")) 117 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE; 118 else if (cp->sub == VMIN || cp->sub == VTIME) { 119 val = strtol(arg, &ep, 10); 120 if (val > UCHAR_MAX) { 121 warnx("maximum option value is %d -- %s", 122 UCHAR_MAX, name); 123 usage(); 124 } 125 if (*ep != '\0') { 126 warnx("option requires a numeric argument -- %s", name); 127 usage(); 128 } 129 ip->t.c_cc[cp->sub] = val; 130 } else if (arg[0] == '^') 131 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 : 132 (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037; 133 else 134 ip->t.c_cc[cp->sub] = arg[0]; 135 ip->set = 1; 136 return (1); 137 } 138