mirror of
https://github.com/freebsd/freebsd-src.git
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a228302fca
Reviewed by:markm
219 lines
5.5 KiB
C
219 lines
5.5 KiB
C
/*-
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* Copyright (c) 1991 Keith Muller.
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Keith Muller of the University of California, San Diego.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)egetopt.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "extern.h"
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/*
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* egetopt: get option letter from argument vector (an extended
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* version of getopt).
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*
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* Non standard additions to the ostr specs are:
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* 1) '?': immediate value following arg is optional (no white space
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* between the arg and the value)
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* 2) '#': +/- followed by a number (with an optional sign but
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* no white space between the arg and the number). The - may be
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* combined with other options, but the + cannot.
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*/
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int eopterr = 1; /* if error message should be printed */
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int eoptind = 1; /* index into parent argv vector */
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int eoptopt; /* character checked for validity */
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char *eoptarg; /* argument associated with option */
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#define BADCH (int)'?'
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static char emsg[] = "";
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int
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egetopt(int nargc, char * const *nargv, const char *ostr)
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{
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static char *place = emsg; /* option letter processing */
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char *oli; /* option letter list index */
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static int delim; /* which option delimeter */
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char *p;
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static char savec = '\0';
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if (savec != '\0') {
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*place = savec;
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savec = '\0';
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}
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if (!*place) {
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/*
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* update scanning pointer
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*/
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if ((eoptind >= nargc) ||
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((*(place = nargv[eoptind]) != '-') && (*place != '+'))) {
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place = emsg;
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return (-1);
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}
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delim = (int)*place;
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if (place[1] && *++place == '-' && !place[1]) {
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/*
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* found "--"
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*/
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++eoptind;
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place = emsg;
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return (-1);
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}
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}
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/*
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* check option letter
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*/
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if ((eoptopt = (int)*place++) == (int)':' || (eoptopt == (int)'?') ||
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!(oli = strchr(ostr, eoptopt))) {
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/*
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* if the user didn't specify '-' as an option,
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* assume it means -1 when by itself.
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*/
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if ((eoptopt == (int)'-') && !*place)
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return (-1);
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if (strchr(ostr, '#') && (isdigit(eoptopt) ||
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(((eoptopt == (int)'-') || (eoptopt == (int)'+')) &&
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isdigit(*place)))) {
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/*
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* # option: +/- with a number is ok
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*/
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for (p = place; *p != '\0'; ++p) {
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if (!isdigit(*p))
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break;
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}
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eoptarg = place-1;
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if (*p == '\0') {
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place = emsg;
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++eoptind;
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} else {
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place = p;
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savec = *p;
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*place = '\0';
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}
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return (delim);
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}
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if (!*place)
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++eoptind;
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if (eopterr) {
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if (!(p = strrchr(*nargv, '/')))
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p = *nargv;
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else
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++p;
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(void)fprintf(stderr, "%s: illegal option -- %c\n",
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p, eoptopt);
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}
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return (BADCH);
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}
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if (delim == (int)'+') {
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/*
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* '+' is only allowed with numbers
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*/
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if (!*place)
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++eoptind;
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if (eopterr) {
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if (!(p = strrchr(*nargv, '/')))
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p = *nargv;
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else
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++p;
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(void)fprintf(stderr,
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"%s: illegal '+' delimiter with option -- %c\n",
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p, eoptopt);
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}
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return (BADCH);
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}
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++oli;
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if ((*oli != ':') && (*oli != '?')) {
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/*
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* don't need argument
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*/
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eoptarg = NULL;
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if (!*place)
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++eoptind;
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return (eoptopt);
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}
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if (*place) {
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/*
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* no white space
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*/
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eoptarg = place;
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} else if (*oli == '?') {
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/*
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* no arg, but NOT required
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*/
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eoptarg = NULL;
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} else if (nargc <= ++eoptind) {
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/*
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* no arg, but IS required
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*/
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place = emsg;
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if (eopterr) {
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if (!(p = strrchr(*nargv, '/')))
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p = *nargv;
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else
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++p;
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(void)fprintf(stderr,
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"%s: option requires an argument -- %c\n", p,
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eoptopt);
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}
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return (BADCH);
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} else {
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/*
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* arg has white space
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*/
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eoptarg = nargv[eoptind];
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}
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place = emsg;
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++eoptind;
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return (eoptopt);
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}
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