1 /* $NetBSD: gen-unix.h,v 1.1 2024/02/18 20:57:31 christos Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * SPDX-License-Identifier: MPL-2.0 7 * 8 * This Source Code Form is subject to the terms of the Mozilla Public 9 * License, v. 2.0. If a copy of the MPL was not distributed with this 10 * file, you can obtain one at https://mozilla.org/MPL/2.0/. 11 * 12 * See the COPYRIGHT file distributed with this work for additional 13 * information regarding copyright ownership. 14 */ 15 16 /*! \file 17 * \brief 18 * This file is responsible for defining two operations that are not 19 * directly portable between Unix-like systems and Windows NT, option 20 * parsing and directory scanning. It is here because it was decided 21 * that the "gen" build utility was not to depend on libisc.a, so 22 * the functions declared in isc/commandline.h and isc/dir.h could not 23 * be used. 24 * 25 * The commandline stuff is really just a wrapper around getopt(). 26 * The dir stuff was shrunk to fit the needs of gen.c. 27 */ 28 29 #ifndef DNS_GEN_UNIX_H 30 #define DNS_GEN_UNIX_H 1 31 32 #include <dirent.h> 33 #include <errno.h> 34 #include <stdbool.h> 35 #include <stdlib.h> 36 #include <sys/types.h> /* Required on some systems for dirent.h. */ 37 #include <unistd.h> /* XXXDCL Required for ?. */ 38 39 #include <isc/lang.h> 40 41 #ifdef NEED_OPTARG 42 extern char *optarg; 43 #endif /* ifdef NEED_OPTARG */ 44 45 #define isc_commandline_parse getopt 46 #define isc_commandline_argument optarg 47 48 typedef struct { 49 DIR *handle; 50 char *filename; 51 } isc_dir_t; 52 53 ISC_LANG_BEGINDECLS 54 55 static bool 56 start_directory(const char *path, isc_dir_t *dir) { 57 dir->handle = opendir(path); 58 59 if (dir->handle != NULL) { 60 return (true); 61 } else { 62 return (false); 63 } 64 } 65 66 static bool 67 next_file(isc_dir_t *dir) { 68 struct dirent *dirent; 69 70 dir->filename = NULL; 71 72 if (dir->handle != NULL) { 73 errno = 0; 74 dirent = readdir(dir->handle); 75 if (dirent != NULL) { 76 dir->filename = dirent->d_name; 77 } else { 78 if (errno != 0) { 79 exit(1); 80 } 81 } 82 } 83 84 if (dir->filename != NULL) { 85 return (true); 86 } else { 87 return (false); 88 } 89 } 90 91 static void 92 end_directory(isc_dir_t *dir) { 93 if (dir->handle != NULL) { 94 (void)closedir(dir->handle); 95 } 96 97 dir->handle = NULL; 98 } 99 100 ISC_LANG_ENDDECLS 101 102 #endif /* DNS_GEN_UNIX_H */ 103