| [9] | 1 | /*
|
|---|
| 2 | * Copyright (c) 1987, 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. All advertising materials mentioning features or use of this software
|
|---|
| 14 | * must display the following acknowledgement:
|
|---|
| 15 | * This product includes software developed by the University of
|
|---|
| 16 | * California, Berkeley and its contributors.
|
|---|
| 17 | * 4. Neither the name of the University nor the names of its contributors
|
|---|
| 18 | * may be used to endorse or promote products derived from this software
|
|---|
| 19 | * without specific prior written permission.
|
|---|
| 20 | *
|
|---|
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|---|
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|---|
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|---|
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|---|
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|---|
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|---|
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|---|
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|---|
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|---|
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|---|
| 31 | * SUCH DAMAGE.
|
|---|
| 32 | */
|
|---|
| 33 |
|
|---|
| 34 | #include <string.h>
|
|---|
| 35 | #include <stdio.h>
|
|---|
| 36 |
|
|---|
| 37 | int opterr = 1, /* if error message should be printed */
|
|---|
| 38 | optind = 1, /* index into parent argv vector */
|
|---|
| 39 | optopt, /* character checked for validity */
|
|---|
| 40 | optreset; /* reset getopt */
|
|---|
| 41 | char *optarg; /* argument associated with option */
|
|---|
| 42 |
|
|---|
| 43 | #define BADCH (int)'?'
|
|---|
| 44 | #define BADARG (int)':'
|
|---|
| 45 | #define EMSG ""
|
|---|
| 46 |
|
|---|
| 47 | /*
|
|---|
| 48 | * getopt --
|
|---|
| 49 | * Parse argc/argv argument vector.
|
|---|
| 50 | */
|
|---|
| 51 | int
|
|---|
| 52 | getopt(int nargc, char * const nargv[], const char *ostr)
|
|---|
| 53 | {
|
|---|
| 54 | static char *place = EMSG; /* option letter processing */
|
|---|
| 55 | char *oli; /* option letter list index */
|
|---|
| 56 |
|
|---|
| 57 | if (optreset || !*place) { /* update scanning pointer */
|
|---|
| 58 | optreset = 0;
|
|---|
| 59 | if (optind >= nargc || *(place = nargv[optind]) != '-') {
|
|---|
| 60 | place = EMSG;
|
|---|
| 61 | return (-1);
|
|---|
| 62 | }
|
|---|
| 63 | if (place[1] && *++place == '-') { /* found "--" */
|
|---|
| 64 | ++optind;
|
|---|
| 65 | place = EMSG;
|
|---|
| 66 | return (-1);
|
|---|
| 67 | }
|
|---|
| 68 | } /* option letter okay? */
|
|---|
| 69 | if ((optopt = (int)*place++) == (int)':' ||
|
|---|
| 70 | !(oli = strchr(ostr, optopt))) {
|
|---|
| 71 | /*
|
|---|
| 72 | * if the user didn't specify '-' as an option,
|
|---|
| 73 | * assume it means -1.
|
|---|
| 74 | */
|
|---|
| 75 | if (optopt == (int)'-')
|
|---|
| 76 | return (-1);
|
|---|
| 77 | if (!*place)
|
|---|
| 78 | ++optind;
|
|---|
| 79 | if (opterr && *ostr != ':')
|
|---|
| 80 | (void)printf("illegal option -- %c\n", optopt);
|
|---|
| 81 | return (BADCH);
|
|---|
| 82 | }
|
|---|
| 83 | if (*++oli != ':') { /* don't need argument */
|
|---|
| 84 | optarg = NULL;
|
|---|
| 85 | if (!*place)
|
|---|
| 86 | ++optind;
|
|---|
| 87 | }
|
|---|
| 88 | else { /* need an argument */
|
|---|
| 89 | if (*place) /* no white space */
|
|---|
| 90 | optarg = place;
|
|---|
| 91 | else if (nargc <= ++optind) { /* no arg */
|
|---|
| 92 | place = EMSG;
|
|---|
| 93 | if (*ostr == ':')
|
|---|
| 94 | return (BADARG);
|
|---|
| 95 | if (opterr)
|
|---|
| 96 | (void)printf("option requires an argument -- %c\n", optopt);
|
|---|
| 97 | return (BADCH);
|
|---|
| 98 | }
|
|---|
| 99 | else /* white space */
|
|---|
| 100 | optarg = nargv[optind];
|
|---|
| 101 | place = EMSG;
|
|---|
| 102 | ++optind;
|
|---|
| 103 | }
|
|---|
| 104 | return (optopt); /* dump back option letter */
|
|---|
| 105 | }
|
|---|
