1 /* $OpenBSD: cchar.c,v 1.12 2016/03/23 14:52:42 mmcc Exp $ */ 2 /* $NetBSD: cchar.c,v 1.10 1996/05/07 18:20:05 jtc Exp $ */ 3 4 /*- 5 * Copyright (c) 1991, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/types.h> 34 #include <sys/ioctl.h> 35 36 #include <err.h> 37 #include <limits.h> 38 #include <stddef.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <termios.h> 42 43 #include "stty.h" 44 #include "extern.h" 45 46 /* 47 * Special control characters. 48 * 49 * Cchars1 are the standard names, cchars2 are the old aliases. 50 * The first are displayed, but both are recognized on the 51 * command line. 52 */ 53 const struct cchar cchars1[] = { 54 { "discard", VDISCARD, CDISCARD }, 55 { "dsusp", VDSUSP, CDSUSP }, 56 { "eof", VEOF, CEOF }, 57 { "eol", VEOL, CEOL }, 58 { "eol2", VEOL2, CEOL }, 59 { "erase", VERASE, CERASE }, 60 { "intr", VINTR, CINTR }, 61 { "kill", VKILL, CKILL }, 62 { "lnext", VLNEXT, CLNEXT }, 63 { "min", VMIN, CMIN }, 64 { "quit", VQUIT, CQUIT }, 65 { "reprint", VREPRINT, CREPRINT }, 66 { "start", VSTART, CSTART }, 67 { "status", VSTATUS, CSTATUS }, 68 { "stop", VSTOP, CSTOP }, 69 { "susp", VSUSP, CSUSP }, 70 { "time", VTIME, CTIME }, 71 { "werase", VWERASE, CWERASE }, 72 { NULL }, 73 }; 74 75 const struct cchar cchars2[] = { 76 { "brk", VEOL, CEOL }, 77 { "flush", VDISCARD, CDISCARD }, 78 { "rprnt", VREPRINT, CREPRINT }, 79 { NULL }, 80 }; 81 82 static int 83 c_cchar(const void *a, const void *b) 84 { 85 return (strcmp(((struct cchar *)a)->name, ((struct cchar *)b)->name)); 86 } 87 88 int 89 csearch(char ***argvp, struct info *ip) 90 { 91 struct cchar *cp, tmp; 92 long val; 93 char *arg, *ep, *name; 94 95 name = **argvp; 96 97 tmp.name = name; 98 if (!(cp = (struct cchar *)bsearch(&tmp, cchars1, 99 sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar), 100 c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars2, 101 sizeof(cchars2)/sizeof(struct cchar) - 1, sizeof(struct cchar), 102 c_cchar))) 103 return (0); 104 105 arg = *++*argvp; 106 if (!arg) { 107 warnx("option requires an argument -- %s", name); 108 usage(); 109 } 110 111 #define CHK(s) (*arg == s[0] && !strcmp(arg, s)) 112 if (CHK("undef") || CHK("<undef>")) 113 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE; 114 else if (cp->sub == VMIN || cp->sub == VTIME) { 115 val = strtol(arg, &ep, 10); 116 if (val > UCHAR_MAX || val < 0) { 117 warnx("maximum option value is %d -- %s", 118 UCHAR_MAX, name); 119 usage(); 120 } 121 if (*ep != '\0') { 122 warnx("option requires a numeric argument -- %s", name); 123 usage(); 124 } 125 ip->t.c_cc[cp->sub] = val; 126 } else if (arg[0] == '^') 127 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 : 128 (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037; 129 else 130 ip->t.c_cc[cp->sub] = arg[0]; 131 ip->set = 1; 132 return (1); 133 } 134