contrib/bind-9.5.2/lib/dns/gen-unix.h

   1 /*
   2  * Copyright (C) 2004, 2005, 2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2001  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: gen-unix.h,v 1.19.128.2 2009/01/19 23:47:02 tbox Exp $ */
  19
  20 /*! \file
  21  * \brief
  22  * This file is responsible for defining two operations that are not
  23  * directly portable between Unix-like systems and Windows NT, option
  24  * parsing and directory scanning.  It is here because it was decided
  25  * that the "gen" build utility was not to depend on libisc.a, so
  26  * the functions declared in isc/commandline.h and isc/dir.h could not
  27  * be used.
  28  *
  29  * The commandline stuff is really just a wrapper around getopt().
  30  * The dir stuff was shrunk to fit the needs of gen.c.
  31  */
  32
  33 #ifndef DNS_GEN_UNIX_H
  34 #define DNS_GEN_UNIX_H 1
  35
  36 #include <sys/types.h>          /* Required on some systems for dirent.h. */
  37
  38 #include <dirent.h>
  39 #include <unistd.h>             /* XXXDCL Required for ?. */
  40
  41 #include <isc/boolean.h>
  42 #include <isc/lang.h>
  43
  44 #ifdef NEED_OPTARG
  45 extern char *optarg;
  46 #endif
  47
  48 #define isc_commandline_parse           getopt
  49 #define isc_commandline_argument        optarg
  50
  51 typedef struct {
  52         DIR *handle;
  53         char *filename;
  54 } isc_dir_t;
  55
  56 ISC_LANG_BEGINDECLS
  57
  58 static isc_boolean_t
  59 start_directory(const char *path, isc_dir_t *dir) {
  60         dir->handle = opendir(path);
  61
  62         if (dir->handle != NULL)
  63                 return (ISC_TRUE);
  64         else
  65                 return (ISC_FALSE);
  66
  67 }
  68
  69 static isc_boolean_t
  70 next_file(isc_dir_t *dir) {
  71         struct dirent *dirent;
  72
  73         dir->filename = NULL;
  74
  75         if (dir->handle != NULL) {
  76                 dirent = readdir(dir->handle);
  77                 if (dirent != NULL)
  78                         dir->filename = dirent->d_name;
  79         }
  80
  81         if (dir->filename != NULL)
  82                 return (ISC_TRUE);
  83         else
  84                 return (ISC_FALSE);
  85 }
  86
  87 static void
  88 end_directory(isc_dir_t *dir) {
  89         if (dir->handle != NULL)
  90                 (void)closedir(dir->handle);
  91
  92         dir->handle = NULL;
  93 }
  94
  95 ISC_LANG_ENDDECLS
  96
  97 #endif /* DNS_GEN_UNIX_H */