contrib/bmake/getopt.c

   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 #ifdef HAVE_CONFIG_H
  35 # include "config.h"
  36 #endif
  37 #if !defined(HAVE_GETOPT) || defined(WANT_GETOPT_LONG) || defined(BROKEN_GETOPT)
  38
  39 #if defined(LIBC_SCCS) && !defined(lint)
  40 /* static char sccsid[] = "from: @(#)getopt.c   8.2 (Berkeley) 4/2/94"; */
  41 static char *rcsid = "$Id: getopt.c,v 1.3 1999/01/08 02:14:18 sjg Exp $";
  42 #endif /* LIBC_SCCS and not lint */
  43
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47
  48
  49 #define BADCH   (int)'?'
  50 #define BADARG  (int)':'
  51 #define EMSG    ""
  52
  53 int     opterr = 1,             /* if error message should be printed */
  54         optind = 1,             /* index into parent argv vector */
  55         optopt = BADCH,         /* character checked for validity */
  56         optreset;               /* reset getopt */
  57 char    *optarg;                /* argument associated with option */
  58
  59 /*
  60  * getopt --
  61  *      Parse argc/argv argument vector.
  62  */
  63 int
  64 getopt(nargc, nargv, ostr)
  65         int nargc;
  66         char * const *nargv;
  67         const char *ostr;
  68 {
  69         extern char *__progname;
  70         static char *place = EMSG;              /* option letter processing */
  71         char *oli;                              /* option letter list index */
  72
  73 #ifndef BSD4_4
  74         if (!__progname) {
  75                 if (__progname = strrchr(nargv[0], '/'))
  76                         ++__progname;
  77                 else
  78                         __progname = nargv[0];
  79         }
  80 #endif
  81
  82         if (optreset || !*place) {              /* update scanning pointer */
  83                 optreset = 0;
  84                 if (optind >= nargc || *(place = nargv[optind]) != '-') {
  85                         place = EMSG;
  86                         return (-1);
  87                 }
  88                 if (place[1] && *++place == '-' /* found "--" */
  89                     && !place[1]) {             /* and not "--foo" */
  90                         ++optind;
  91                         place = EMSG;
  92                         return (-1);
  93                 }
  94         }                                       /* option letter okay? */
  95         if ((optopt = (int)*place++) == (int)':' ||
  96             !(oli = strchr(ostr, optopt))) {
  97                 /*
  98                  * if the user didn't specify '-' as an option,
  99                  * assume it means -1.
 100                  */
 101                 if (optopt == (int)'-')
 102                         return (-1);
 103                 if (!*place)
 104                         ++optind;
 105                 if (opterr && *ostr != ':')
 106                         (void)fprintf(stderr,
 107                             "%s: illegal option -- %c\n", __progname, optopt);
 108                 return (BADCH);
 109         }
 110         if (*++oli != ':') {                    /* don't need argument */
 111                 optarg = NULL;
 112                 if (!*place)
 113                         ++optind;
 114         }
 115         else {                                  /* need an argument */
 116                 if (*place)                     /* no white space */
 117                         optarg = place;
 118                 else if (nargc <= ++optind) {   /* no arg */
 119                         place = EMSG;
 120                         if (*ostr == ':')
 121                                 return (BADARG);
 122                         if (opterr)
 123                                 (void)fprintf(stderr,
 124                                     "%s: option requires an argument -- %c\n",
 125                                     __progname, optopt);
 126                         return (BADCH);
 127                 }
 128                 else                            /* white space */
 129                         optarg = nargv[optind];
 130                 place = EMSG;
 131                 ++optind;
 132         }
 133         return (optopt);                        /* dump back option letter */
 134 }
 135 #endif
 136 #ifdef MAIN
 137 #ifndef BSD4_4
 138 char *__progname;
 139 #endif
 140
 141 int
 142 main(argc, argv)
 143         int argc;
 144         char *argv[];
 145 {
 146         int c;
 147         char *opts = argv[1];
 148
 149         --argc;
 150         ++argv;
 151
 152         while ((c = getopt(argc, argv, opts)) != EOF) {
 153                 switch (c) {
 154                 case '-':
 155                         if (optarg)
 156                                 printf("--%s ", optarg);
 157                         break;
 158                 case '?':
 159                         exit(1);
 160                         break;
 161                 default:
 162                         if (optarg)
 163                                 printf("-%c %s ", c, optarg);
 164                         else
 165                                 printf("-%c ", c);
 166                         break;
 167                 }
 168         }
 169
 170         if (optind < argc) {
 171                 printf("-- ");
 172                 for (; optind < argc; ++optind) {
 173                         printf("%s ", argv[optind]);
 174                 }
 175         }
 176         printf("\n");
 177         exit(0);
 178 }
 179 #endif