usr/src/cmd/bnu/getopt.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 #ident  "%Z%%M% %I%     %E% SMI"        /* from SVR4 bnu:getopt.c 2.3 */
  27
  28 #include "uucp.h"
  29
  30 /*      @(#)getopt.c    1.2     */
  31 /*      3.0 SID #       1.2     */
  32 /*LINTLIBRARY*/
  33 #define ERR(s, c)       if(opterr){\
  34         (void) fputs(argv[0], stderr);\
  35         (void) fputs(s, stderr);\
  36         (void) fputc(c, stderr);\
  37         (void) fputc('\n', stderr);}
  38
  39 extern int strcmp();
  40 extern char *strchr();
  41
  42 int     opterr = 1;
  43 int     optind = 1;
  44 int     optopt;
  45 char    *optarg;
  46
  47 int
  48 getopt(argc, argv, opts)
  49 int     argc;
  50 char    **argv, *opts;
  51 {
  52         static int sp = 1;
  53         register int c;
  54         register char *cp;
  55
  56         if(sp == 1)
  57                 if(optind >= argc ||
  58                    argv[optind][0] != '-' || argv[optind][1] == '\0')
  59                         return(EOF);
  60                 else if(strcmp(argv[optind], "--") == NULL) {
  61                         optind++;
  62                         return(EOF);
  63                 }
  64         optopt = c = argv[optind][sp];
  65         if(c == ':' || (cp=strchr(opts, c)) == NULL) {
  66                 ERR(": illegal option -- ", c);
  67                 if(argv[optind][++sp] == '\0') {
  68                         optind++;
  69                         sp = 1;
  70                 }
  71                 return('?');
  72         }
  73         if(*++cp == ':') {
  74                 if(argv[optind][sp+1] != '\0')
  75                         optarg = &argv[optind++][sp+1];
  76                 else if(++optind >= argc) {
  77                         ERR(": option requires an argument -- ", c);
  78                         sp = 1;
  79                         return('?');
  80 #ifndef NO_MINUS
  81                 } else
  82                         optarg = argv[optind++];
  83 #else /* NO_MINUS */
  84                 } else {
  85                         optarg = argv[optind++];
  86                         if (*optarg == '-') {
  87                             ERR(": option requires an argument -- ", c);
  88                             sp = 1;
  89                             return('?');
  90                         }
  91                 }
  92 #endif /* NO_MINUS */
  93                 sp = 1;
  94         } else {
  95                 if(argv[optind][++sp] == '\0') {
  96                         sp = 1;
  97                         optind++;
  98                 }
  99                 optarg = NULL;
 100         }
 101         return(c);
 102 }