external/bsd/bind/dist/lib/dns/gen-unix.h

   1 /*      $NetBSD: gen-unix.h,v 1.4 2014/12/10 04:37:58 christos Exp $    */
   2
   3 /*
   4  * Copyright (C) 2004, 2005, 2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 1999-2001  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* Id: gen-unix.h,v 1.21 2009/01/17 23:47:42 tbox Exp  */
  21
  22 /*! \file
  23  * \brief
  24  * This file is responsible for defining two operations that are not
  25  * directly portable between Unix-like systems and Windows NT, option
  26  * parsing and directory scanning.  It is here because it was decided
  27  * that the "gen" build utility was not to depend on libisc.a, so
  28  * the functions declared in isc/commandline.h and isc/dir.h could not
  29  * be used.
  30  *
  31  * The commandline stuff is really just a wrapper around getopt().
  32  * The dir stuff was shrunk to fit the needs of gen.c.
  33  */
  34
  35 #ifndef DNS_GEN_UNIX_H
  36 #define DNS_GEN_UNIX_H 1
  37
  38 #include <sys/types.h>          /* Required on some systems for dirent.h. */
  39
  40 #include <dirent.h>
  41 #include <unistd.h>             /* XXXDCL Required for ?. */
  42
  43 #include <isc/boolean.h>
  44 #include <isc/lang.h>
  45
  46 #ifdef NEED_OPTARG
  47 extern char *optarg;
  48 #endif
  49
  50 #define isc_commandline_parse           getopt
  51 #define isc_commandline_argument        optarg
  52
  53 typedef struct {
  54         DIR *handle;
  55         char *filename;
  56 } isc_dir_t;
  57
  58 ISC_LANG_BEGINDECLS
  59
  60 static isc_boolean_t
  61 start_directory(const char *path, isc_dir_t *dir) {
  62         dir->handle = opendir(path);
  63
  64         if (dir->handle != NULL)
  65                 return (ISC_TRUE);
  66         else
  67                 return (ISC_FALSE);
  68
  69 }
  70
  71 static isc_boolean_t
  72 next_file(isc_dir_t *dir) {
  73         struct dirent *dirent;
  74
  75         dir->filename = NULL;
  76
  77         if (dir->handle != NULL) {
  78                 dirent = readdir(dir->handle);
  79                 if (dirent != NULL)
  80                         dir->filename = dirent->d_name;
  81         }
  82
  83         if (dir->filename != NULL)
  84                 return (ISC_TRUE);
  85         else
  86                 return (ISC_FALSE);
  87 }
  88
  89 static void
  90 end_directory(isc_dir_t *dir) {
  91         if (dir->handle != NULL)
  92                 (void)closedir(dir->handle);
  93
  94         dir->handle = NULL;
  95 }
  96
  97 ISC_LANG_ENDDECLS
  98
  99 #endif /* DNS_GEN_UNIX_H */