authoption.c

   1 /*
   2 ** Copyright 2002 Double Precision, Inc.  See COPYING for
   3 ** distribution information.
   4 */
   5
   6 #if     HAVE_CONFIG_H
   7 #include        "courier_auth_config.h"
   8 #endif
   9 #include        <stdio.h>
  10 #include        <stdlib.h>
  11 #include        <string.h>
  12 #include        <errno.h>
  13 #include        <pwd.h>
  14 #if     HAVE_UNISTD_H
  15 #include        <unistd.h>
  16 #endif
  17
  18 #include        "auth.h"
  19
  20 static const char rcsid[]="$Id: authoption.c,v 1.3 2004/11/10 00:42:04 mrsam Exp $";
  21
  22
  23 int auth_getoptionenvint(const char *keyword)
  24 {
  25         char *p = auth_getoptionenv(keyword);
  26         int i;
  27
  28         if (!p) return 0;
  29
  30         i = atoi(p);
  31         free(p);
  32         return i;
  33 }
  34
  35 char *auth_getoptionenv(const char *keyword)
  36 {
  37         return auth_getoption(getenv("OPTIONS"), keyword);
  38 }
  39
  40 char *auth_getoption(const char *options, const char *keyword)
  41 {
  42         size_t keyword_l=strlen(keyword);
  43         char *p;
  44
  45         while (options)
  46         {
  47                 if (strncmp(options, keyword, keyword_l) == 0)
  48                 {
  49                         if (options[keyword_l] == 0 ||
  50                             options[keyword_l] == ',')
  51                                 return strdup("");
  52
  53                         if (options[keyword_l] == '=')
  54                         {
  55                                 options += keyword_l;
  56                                 ++options;
  57
  58                                 for (keyword_l=0;
  59                                      options[keyword_l] &&
  60                                              options[keyword_l] != ',';
  61                                      ++keyword_l)
  62                                         ;
  63
  64                                 if (!(p=malloc(keyword_l+1)))
  65                                         return NULL;
  66                                 memcpy(p, options, keyword_l);
  67                                 p[keyword_l]=0;
  68                                 return p;
  69                         }
  70                 }
  71
  72                 options=strchr(options, ',');
  73                 if (options)
  74                         ++options;
  75         }
  76         errno=ENOENT;
  77         return NULL;
  78 }