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 30 #include <sys/types.h> 31 32 #include <err.h> 33 #include <limits.h> 34 #include <stdlib.h> 35 #include <string.h> 36 37 #include "stty.h" 38 #include "extern.h" 39 40 static int c_cchar(const void *, const void *); 41 42 /* 43 * Special control characters. 44 * 45 * Cchars1 are the standard names, cchars2 are the old aliases. 46 * The first are displayed, but both are recognized on the 47 * command line. 48 */ 49 struct cchar cchars1[] = { 50 { "discard", VDISCARD, CDISCARD }, 51 { "dsusp", VDSUSP, CDSUSP }, 52 { "eof", VEOF, CEOF }, 53 { "eol", VEOL, CEOL }, 54 { "eol2", VEOL2, CEOL }, 55 { "erase", VERASE, CERASE }, 56 { "erase2", VERASE2, CERASE2 }, 57 { "intr", VINTR, CINTR }, 58 { "kill", VKILL, CKILL }, 59 { "lnext", VLNEXT, CLNEXT }, 60 { "min", VMIN, CMIN }, 61 { "quit", VQUIT, CQUIT }, 62 { "reprint", VREPRINT, CREPRINT }, 63 { "start", VSTART, CSTART }, 64 { "status", VSTATUS, CSTATUS }, 65 { "stop", VSTOP, CSTOP }, 66 { "susp", VSUSP, CSUSP }, 67 { "time", VTIME, CTIME }, 68 { "werase", VWERASE, CWERASE }, 69 { NULL, 0, 0}, 70 }; 71 72 struct cchar cchars2[] = { 73 { "brk", VEOL, CEOL }, 74 { "flush", VDISCARD, CDISCARD }, 75 { "rprnt", VREPRINT, CREPRINT }, 76 { NULL, 0, 0 }, 77 }; 78 79 static int 80 c_cchar(const void *a, const void *b) 81 { 82 83 return (strcmp(((const struct cchar *)a)->name, ((const struct cchar *)b)->name)); 84 } 85 86 int 87 csearch(char ***argvp, struct info *ip) 88 { 89 struct cchar *cp, tmp; 90 long val; 91 char *arg, *ep, *name; 92 93 name = **argvp; 94 95 tmp.name = name; 96 if (!(cp = (struct cchar *)bsearch(&tmp, cchars1, 97 sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar), 98 c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars2, 99 sizeof(cchars2)/sizeof(struct cchar) - 1, sizeof(struct cchar), 100 c_cchar))) 101 return (0); 102 103 arg = *++*argvp; 104 if (!arg) { 105 warnx("option requires an argument -- %s", name); 106 usage(); 107 } 108 109 #define CHK(s) (*arg == s[0] && !strcmp(arg, s)) 110 if (CHK("undef") || CHK("<undef>")) 111 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE; 112 else if (cp->sub == VMIN || cp->sub == VTIME) { 113 val = strtol(arg, &ep, 10); 114 if (val > UCHAR_MAX) { 115 warnx("maximum option value is %d -- %s", 116 UCHAR_MAX, name); 117 usage(); 118 } 119 if (*ep != '\0') { 120 warnx("option requires a numeric argument -- %s", name); 121 usage(); 122 } 123 ip->t.c_cc[cp->sub] = val; 124 } else if (arg[0] == '^') 125 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 : 126 (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037; 127 else 128 ip->t.c_cc[cp->sub] = arg[0]; 129 ip->set = 1; 130 return (1); 131 } 132