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. 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[] = "from: @(#)cchar.c 8.5 (Berkeley) 4/2/94";*/ 36 static char *rcsid = "$Id: cchar.c,v 1.8 1994/09/20 04:52:03 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/types.h> 40 41 #include <err.h> 42 #include <limits.h> 43 #include <stddef.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 #include "stty.h" 48 #include "extern.h" 49 50 /* 51 * Special control characters. 52 * 53 * Cchars1 are the standard names, cchars2 are the old aliases. 54 * The first are displayed, but both are recognized on the 55 * command line. 56 */ 57 struct cchar cchars1[] = { 58 { "discard", VDISCARD, CDISCARD }, 59 { "dsusp", VDSUSP, CDSUSP }, 60 { "eof", VEOF, CEOF }, 61 { "eol", VEOL, CEOL }, 62 { "eol2", VEOL2, CEOL }, 63 { "erase", VERASE, CERASE }, 64 { "intr", VINTR, CINTR }, 65 { "kill", VKILL, CKILL }, 66 { "lnext", VLNEXT, CLNEXT }, 67 { "min", VMIN, CMIN }, 68 { "quit", VQUIT, CQUIT }, 69 { "reprint", VREPRINT, CREPRINT }, 70 { "start", VSTART, CSTART }, 71 { "status", VSTATUS, CSTATUS }, 72 { "stop", VSTOP, CSTOP }, 73 { "susp", VSUSP, CSUSP }, 74 { "time", VTIME, CTIME }, 75 { "werase", VWERASE, CWERASE }, 76 { NULL }, 77 }; 78 79 struct cchar cchars2[] = { 80 { "brk", VEOL, CEOL }, 81 { "flush", VDISCARD, CDISCARD }, 82 { "rprnt", VREPRINT, CREPRINT }, 83 { NULL }, 84 }; 85 86 static int 87 c_cchar(a, b) 88 const void *a, *b; 89 { 90 91 return (strcmp(((struct cchar *)a)->name, ((struct cchar *)b)->name)); 92 } 93 94 int 95 csearch(argvp, ip) 96 char ***argvp; 97 struct info *ip; 98 { 99 struct cchar *cp, tmp; 100 long val; 101 char *arg, *ep, *name; 102 103 name = **argvp; 104 105 tmp.name = name; 106 if (!(cp = (struct cchar *)bsearch(&tmp, cchars1, 107 sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar), 108 c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars1, 109 sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar), 110 c_cchar))) 111 return (0); 112 113 arg = *++*argvp; 114 if (!arg) { 115 warnx("option requires an argument -- %s", name); 116 usage(); 117 } 118 119 #define CHK(s) (*arg == s[0] && !strcmp(arg, s)) 120 if (CHK("undef") || CHK("<undef>")) 121 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE; 122 else if (cp->sub == VMIN || cp->sub == VTIME) { 123 val = strtol(arg, &ep, 10); 124 if (val == _POSIX_VDISABLE) { 125 warnx("value of %ld would disable the option -- %s", 126 val, name); 127 usage(); 128 } 129 if (val > UCHAR_MAX) { 130 warnx("maximum option value is %d -- %s", 131 UCHAR_MAX, name); 132 usage(); 133 } 134 if (*ep != '\0') { 135 warnx("option requires a numeric argument -- %s", name); 136 usage(); 137 } 138 ip->t.c_cc[cp->sub] = val; 139 } else if (arg[0] == '^') 140 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 : 141 (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037; 142 else 143 ip->t.c_cc[cp->sub] = arg[0]; 144 ip->set = 1; 145 return (1); 146 } 147