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 #ifndef lint 31 #if 0 32 static char sccsid[] = "@(#)cchar.c 8.5 (Berkeley) 4/2/94"; 33 #endif 34 #endif /* not lint */ 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/types.h> 39 40 #include <err.h> 41 #include <limits.h> 42 #include <stddef.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #include "stty.h" 47 #include "extern.h" 48 49 static int c_cchar(const void *, const void *); 50 51 /* 52 * Special control characters. 53 * 54 * Cchars1 are the standard names, cchars2 are the old aliases. 55 * The first are displayed, but both are recognized on the 56 * command line. 57 */ 58 struct cchar cchars1[] = { 59 { "discard", VDISCARD, CDISCARD }, 60 { "dsusp", VDSUSP, CDSUSP }, 61 { "eof", VEOF, CEOF }, 62 { "eol", VEOL, CEOL }, 63 { "eol2", VEOL2, CEOL }, 64 { "erase", VERASE, CERASE }, 65 { "erase2", VERASE2, CERASE2 }, 66 { "intr", VINTR, CINTR }, 67 { "kill", VKILL, CKILL }, 68 { "lnext", VLNEXT, CLNEXT }, 69 { "min", VMIN, CMIN }, 70 { "quit", VQUIT, CQUIT }, 71 { "reprint", VREPRINT, CREPRINT }, 72 { "start", VSTART, CSTART }, 73 { "status", VSTATUS, CSTATUS }, 74 { "stop", VSTOP, CSTOP }, 75 { "susp", VSUSP, CSUSP }, 76 { "time", VTIME, CTIME }, 77 { "werase", VWERASE, CWERASE }, 78 { NULL, 0, 0}, 79 }; 80 81 struct cchar cchars2[] = { 82 { "brk", VEOL, CEOL }, 83 { "flush", VDISCARD, CDISCARD }, 84 { "rprnt", VREPRINT, CREPRINT }, 85 { NULL, 0, 0 }, 86 }; 87 88 static int 89 c_cchar(const void *a, const void *b) 90 { 91 92 return (strcmp(((const struct cchar *)a)->name, ((const struct cchar *)b)->name)); 93 } 94 95 int 96 csearch(char ***argvp, struct info *ip) 97 { 98 struct cchar *cp, tmp; 99 long val; 100 char *arg, *ep, *name; 101 102 name = **argvp; 103 104 tmp.name = name; 105 if (!(cp = (struct cchar *)bsearch(&tmp, cchars1, 106 sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar), 107 c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars2, 108 sizeof(cchars2)/sizeof(struct cchar) - 1, sizeof(struct cchar), 109 c_cchar))) 110 return (0); 111 112 arg = *++*argvp; 113 if (!arg) { 114 warnx("option requires an argument -- %s", name); 115 usage(); 116 } 117 118 #define CHK(s) (*arg == s[0] && !strcmp(arg, s)) 119 if (CHK("undef") || CHK("<undef>")) 120 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE; 121 else if (cp->sub == VMIN || cp->sub == VTIME) { 122 val = strtol(arg, &ep, 10); 123 if (val > UCHAR_MAX) { 124 warnx("maximum option value is %d -- %s", 125 UCHAR_MAX, name); 126 usage(); 127 } 128 if (*ep != '\0') { 129 warnx("option requires a numeric argument -- %s", name); 130 usage(); 131 } 132 ip->t.c_cc[cp->sub] = val; 133 } else if (arg[0] == '^') 134 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 : 135 (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037; 136 else 137 ip->t.c_cc[cp->sub] = arg[0]; 138 ip->set = 1; 139 return (1); 140 } 141