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 #endif /* not lint */ 32 #include <sys/cdefs.h> 33 #include <sys/types.h> 34 35 #include <err.h> 36 #include <limits.h> 37 #include <stdlib.h> 38 #include <string.h> 39 40 #include "stty.h" 41 #include "extern.h" 42 43 static int c_cchar(const void *, const void *); 44 45 /* 46 * Special control characters. 47 * 48 * Cchars1 are the standard names, cchars2 are the old aliases. 49 * The first are displayed, but both are recognized on the 50 * command line. 51 */ 52 struct cchar cchars1[] = { 53 { "discard", VDISCARD, CDISCARD }, 54 { "dsusp", VDSUSP, CDSUSP }, 55 { "eof", VEOF, CEOF }, 56 { "eol", VEOL, CEOL }, 57 { "eol2", VEOL2, CEOL }, 58 { "erase", VERASE, CERASE }, 59 { "erase2", VERASE2, CERASE2 }, 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, 0, 0}, 73 }; 74 75 struct cchar cchars2[] = { 76 { "brk", VEOL, CEOL }, 77 { "flush", VDISCARD, CDISCARD }, 78 { "rprnt", VREPRINT, CREPRINT }, 79 { NULL, 0, 0 }, 80 }; 81 82 static int 83 c_cchar(const void *a, const void *b) 84 { 85 86 return (strcmp(((const struct cchar *)a)->name, ((const struct cchar *)b)->name)); 87 } 88 89 int 90 csearch(char ***argvp, struct info *ip) 91 { 92 struct cchar *cp, tmp; 93 long val; 94 char *arg, *ep, *name; 95 96 name = **argvp; 97 98 tmp.name = name; 99 if (!(cp = (struct cchar *)bsearch(&tmp, cchars1, 100 sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar), 101 c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars2, 102 sizeof(cchars2)/sizeof(struct cchar) - 1, sizeof(struct cchar), 103 c_cchar))) 104 return (0); 105 106 arg = *++*argvp; 107 if (!arg) { 108 warnx("option requires an argument -- %s", name); 109 usage(); 110 } 111 112 #define CHK(s) (*arg == s[0] && !strcmp(arg, s)) 113 if (CHK("undef") || CHK("<undef>")) 114 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE; 115 else if (cp->sub == VMIN || cp->sub == VTIME) { 116 val = strtol(arg, &ep, 10); 117 if (val > UCHAR_MAX) { 118 warnx("maximum option value is %d -- %s", 119 UCHAR_MAX, name); 120 usage(); 121 } 122 if (*ep != '\0') { 123 warnx("option requires a numeric argument -- %s", name); 124 usage(); 125 } 126 ip->t.c_cc[cp->sub] = val; 127 } else if (arg[0] == '^') 128 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 : 129 (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037; 130 else 131 ip->t.c_cc[cp->sub] = arg[0]; 132 ip->set = 1; 133 return (1); 134 } 135