usr/src/lib/libsmbfs/smb/cfopt.c

   1 /*
   2  * Copyright (c) 2000, Boris Popov
   3  * 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 Boris Popov.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $Id: cfopt.c,v 1.1.1.1 2001/06/09 00:28:12 zarzycki Exp $
  33  */
  34
  35 #include <sys/types.h>
  36
  37 #include <stdio.h>
  38 #include <string.h>
  39 #include <synch.h>
  40 #include <libintl.h>
  41
  42 #include <cflib.h>
  43 #include <netsmb/smb_lib.h>
  44 #include <assert.h>
  45
  46 /* lock for the variables below */
  47 mutex_t cf_opt_mutex = DEFAULTMUTEX;
  48
  49 int     cf_opterr = 1,          /* if error message should be printed */
  50         cf_optind = 1,          /* index into parent argv vector */
  51         cf_optopt,                      /* character checked for validity */
  52         cf_optreset;            /* reset getopt */
  53 const char *cf_optarg;          /* argument associated with option */
  54
  55 #define BADCH   (int)'?'
  56 #define BADARG  (int)':'
  57 #define EMSG    ""
  58
  59 void
  60 cf_opt_lock(void)
  61 {
  62         mutex_lock(&cf_opt_mutex);
  63 }
  64
  65 void
  66 cf_opt_unlock(void)
  67 {
  68         mutex_unlock(&cf_opt_mutex);
  69 }
  70
  71 int
  72 cf_getopt(nargc, nargv, ostr)
  73         int nargc;
  74         char * const *nargv;
  75         const char *ostr;
  76 {
  77         static const char *place = EMSG;        /* option letter processing */
  78         char *oli;                              /* option letter list index */
  79         int tmpind;
  80
  81         assert(MUTEX_HELD(&cf_opt_mutex));
  82
  83         if (cf_optreset || !*place) {           /* update scanning pointer */
  84                 cf_optreset = 0;
  85                 tmpind = cf_optind;
  86                 for (;;) {
  87                         if (tmpind >= nargc) {
  88                                 place = EMSG;
  89                                 return (-1);
  90                         }
  91                         if (*(place = nargv[tmpind]) != '-') {
  92                                 tmpind++;
  93                                 continue;       /* lookup next option */
  94                         }
  95                         if (place[1] && *++place == '-') {      /* found "--" */
  96                                 cf_optind = ++tmpind;
  97                                 place = EMSG;
  98                                 return (-1);
  99                         }
 100                         cf_optind = tmpind;
 101                         break;
 102                 }
 103         }                                       /* option letter okay? */
 104         if ((cf_optopt = (int)*place++) == (int)':' ||
 105             !(oli = strchr(ostr, cf_optopt))) {
 106                 /*
 107                  * if the user didn't specify '-' as an option,
 108                  * assume it means -1.
 109                  */
 110                 if (cf_optopt == (int)'-')
 111                         return (-1);
 112                 if (!*place)
 113                         ++cf_optind;
 114                 if (cf_opterr && *ostr != ':')
 115                         (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
 116                             "%s: illegal option -- %c\n"),
 117                             __progname, cf_optopt);
 118                 return (BADCH);
 119         }
 120         if (*++oli != ':') {                    /* don't need argument */
 121                 cf_optarg = NULL;
 122                 if (!*place)
 123                         ++cf_optind;
 124         } else {                                        /* need an argument */
 125                 if (*place)                     /* no white space */
 126                         cf_optarg = place;
 127                 else if (nargc <= ++cf_optind) {        /* no arg */
 128                         place = EMSG;
 129                         if (*ostr == ':')
 130                                 return (BADARG);
 131                         if (cf_opterr)
 132                                 (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
 133                                     "%s: option requires an argument -- %c\n"),
 134                                     __progname, cf_optopt);
 135                         return (BADCH);
 136                 } else                          /* white space */
 137                         cf_optarg = nargv[cf_optind];
 138                 place = EMSG;
 139                 ++cf_optind;
 140         }
 141         return (cf_optopt);                     /* dump back option letter */
 142 }