/* $OpenBSD: egetopt.c,v 1.2 1996/06/26 05:37:52 deraadt Exp $ */ /*- * Copyright (c) 1991 Keith Muller. * Copyright (c) 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Keith Muller of the University of California, San Diego. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint /* from: static char sccsid[] = "@(#)egetopt.c 8.1 (Berkeley) 6/6/93"; */ static char *rcsid = "$OpenBSD: egetopt.c,v 1.2 1996/06/26 05:37:52 deraadt Exp $"; #endif /* not lint */ #include <ctype.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "extern.h" /* * egetopt: get option letter from argument vector (an extended * version of getopt). * * Non standard additions to the ostr specs are: * 1) '?': immediate value following arg is optional (no white space * between the arg and the value) * 2) '#': +/- followed by a number (with an optional sign but * no white space between the arg and the number). The - may be * combined with other options, but the + cannot. */ int eopterr = 1; /* if error message should be printed */ int eoptind = 1; /* index into parent argv vector */ int eoptopt; /* character checked for validity */ char *eoptarg; /* argument associated with option */ #define BADCH (int)'?' #define EMSG "" int egetopt(nargc, nargv, ostr) int nargc; char * const *nargv; const char *ostr; { static char *place = EMSG; /* option letter processing */ register char *oli; /* option letter list index */ static int delim; /* which option delimeter */ register char *p; static char savec = '\0'; if (savec != '\0') { *place = savec; savec = '\0'; } if (!*place) { /* * update scanning pointer */ if ((eoptind >= nargc) || ((*(place = nargv[eoptind]) != '-') && (*place != '+'))) { place = EMSG; return (EOF); } delim = (int)*place; if (place[1] && *++place == '-' && !place[1]) { /* * found "--" */ ++eoptind; place = EMSG; return (EOF); } } /* * check option letter */ if ((eoptopt = (int)*place++) == (int)':' || (eoptopt == (int)'?') || !(oli = strchr(ostr, eoptopt))) { /* * if the user didn't specify '-' as an option, * assume it means EOF when by itself. */ if ((eoptopt == (int)'-') && !*place) return (EOF); if (strchr(ostr, '#') && (isdigit(eoptopt) || (((eoptopt == (int)'-') || (eoptopt == (int)'+')) && isdigit(*place)))) { /* * # option: +/- with a number is ok */ for (p = place; *p != '\0'; ++p) { if (!isdigit(*p)) break; } eoptarg = place-1; if (*p == '\0') { place = EMSG; ++eoptind; } else { place = p; savec = *p; *place = '\0'; } return (delim); } if (!*place) ++eoptind; if (eopterr) { if (!(p = strrchr(*nargv, '/'))) p = *nargv; else ++p; (void)fprintf(stderr, "%s: illegal option -- %c\n", p, eoptopt); } return (BADCH); } if (delim == (int)'+') { /* * '+' is only allowed with numbers */ if (!*place) ++eoptind; if (eopterr) { if (!(p = strrchr(*nargv, '/'))) p = *nargv; else ++p; (void)fprintf(stderr, "%s: illegal '+' delimiter with option -- %c\n", p, eoptopt); } return (BADCH); } ++oli; if ((*oli != ':') && (*oli != '?')) { /* * don't need argument */ eoptarg = NULL; if (!*place) ++eoptind; return (eoptopt); } if (*place) { /* * no white space */ eoptarg = place; } else if (*oli == '?') { /* * no arg, but NOT required */ eoptarg = NULL; } else if (nargc <= ++eoptind) { /* * no arg, but IS required */ place = EMSG; if (eopterr) { if (!(p = strrchr(*nargv, '/'))) p = *nargv; else ++p; (void)fprintf(stderr, "%s: option requires an argument -- %c\n", p, eoptopt); } return (BADCH); } else { /* * arg has white space */ eoptarg = nargv[eoptind]; } place = EMSG; ++eoptind; return (eoptopt); }