1/* $NetBSD: stdio.c,v 1.1 2024/02/18 20:57:57 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#include <errno.h> 17#include <unistd.h> 18 19#include <isc/stat.h> 20#include <isc/stdio.h> 21#include <isc/util.h> 22 23#include "errno2result.h" 24 25isc_result_t 26isc_stdio_open(const char *filename, const char *mode, FILE **fp) { 27 FILE *f; 28 29 f = fopen(filename, mode); 30 if (f == NULL) { 31 return (isc__errno2result(errno)); 32 } 33 *fp = f; 34 return (ISC_R_SUCCESS); 35} 36 37isc_result_t 38isc_stdio_close(FILE *f) { 39 int r; 40 41 r = fclose(f); 42 if (r == 0) { 43 return (ISC_R_SUCCESS); 44 } else { 45 return (isc__errno2result(errno)); 46 } 47} 48 49isc_result_t 50isc_stdio_seek(FILE *f, off_t offset, int whence) { 51 int r; 52 53 r = fseeko(f, offset, whence); 54 if (r == 0) { 55 return (ISC_R_SUCCESS); 56 } else { 57 return (isc__errno2result(errno)); 58 } 59} 60 61isc_result_t 62isc_stdio_tell(FILE *f, off_t *offsetp) { 63 off_t r; 64 65 REQUIRE(offsetp != NULL); 66 67 r = ftello(f); 68 if (r >= 0) { 69 *offsetp = r; 70 return (ISC_R_SUCCESS); 71 } else { 72 return (isc__errno2result(errno)); 73 } 74} 75 76isc_result_t 77isc_stdio_read(void *ptr, size_t size, size_t nmemb, FILE *f, size_t *nret) { 78 isc_result_t result = ISC_R_SUCCESS; 79 size_t r; 80 81 clearerr(f); 82 r = fread(ptr, size, nmemb, f); 83 if (r != nmemb) { 84 if (feof(f)) { 85 result = ISC_R_EOF; 86 } else { 87 result = isc__errno2result(errno); 88 } 89 } 90 if (nret != NULL) { 91 *nret = r; 92 } 93 return (result); 94} 95 96isc_result_t 97isc_stdio_write(const void *ptr, size_t size, size_t nmemb, FILE *f, 98 size_t *nret) { 99 isc_result_t result = ISC_R_SUCCESS; 100 size_t r; 101 102 clearerr(f); 103 r = fwrite(ptr, size, nmemb, f); 104 if (r != nmemb) { 105 result = isc__errno2result(errno); 106 } 107 if (nret != NULL) { 108 *nret = r; 109 } 110 return (result); 111} 112 113isc_result_t 114isc_stdio_flush(FILE *f) { 115 int r; 116 117 r = fflush(f); 118 if (r == 0) { 119 return (ISC_R_SUCCESS); 120 } else { 121 return (isc__errno2result(errno)); 122 } 123} 124 125/* 126 * OpenBSD has deprecated ENOTSUP in favor of EOPNOTSUPP. 127 */ 128#if defined(EOPNOTSUPP) && !defined(ENOTSUP) 129#define ENOTSUP EOPNOTSUPP 130#endif /* if defined(EOPNOTSUPP) && !defined(ENOTSUP) */ 131 132isc_result_t 133isc_stdio_sync(FILE *f) { 134 struct stat buf; 135 int r; 136 137 if (fstat(fileno(f), &buf) != 0) { 138 return (isc__errno2result(errno)); 139 } 140 141 /* 142 * Only call fsync() on regular files. 143 */ 144 if ((buf.st_mode & S_IFMT) != S_IFREG) { 145 return (ISC_R_SUCCESS); 146 } 147 148 r = fsync(fileno(f)); 149 if (r == 0) { 150 return (ISC_R_SUCCESS); 151 } else { 152 return (isc__errno2result(errno)); 153 } 154} 155