1 /* $NetBSD: stdio.c,v 1.7 2015/07/08 17:29:00 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2004, 2007, 2011-2014 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 2000, 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 */ 21 22 #include <config.h> 23 24 #include <errno.h> 25 #include <unistd.h> 26 27 #include <isc/stdio.h> 28 #include <isc/stat.h> 29 #include <isc/util.h> 30 31 #include "errno2result.h" 32 33 isc_result_t 34 isc_stdio_open(const char *filename, const char *mode, FILE **fp) { 35 FILE *f; 36 37 f = fopen(filename, mode); 38 if (f == NULL) 39 return (isc__errno2result(errno)); 40 *fp = f; 41 return (ISC_R_SUCCESS); 42 } 43 44 isc_result_t 45 isc_stdio_close(FILE *f) { 46 int r; 47 48 r = fclose(f); 49 if (r == 0) 50 return (ISC_R_SUCCESS); 51 else 52 return (isc__errno2result(errno)); 53 } 54 55 isc_result_t 56 isc_stdio_seek(FILE *f, off_t offset, int whence) { 57 int r; 58 59 #ifdef HAVE_FSEEKO 60 r = fseeko(f, offset, whence); 61 #else 62 r = fseek(f, offset, whence); 63 #endif 64 if (r == 0) 65 return (ISC_R_SUCCESS); 66 else 67 return (isc__errno2result(errno)); 68 } 69 70 isc_result_t 71 isc_stdio_tell(FILE *f, off_t *offsetp) { 72 off_t r; 73 74 REQUIRE(offsetp != NULL); 75 76 #ifdef HAVE_FTELLO 77 r = ftello(f); 78 #else 79 r = ftell(f); 80 #endif 81 if (r >= 0) { 82 *offsetp = r; 83 return (ISC_R_SUCCESS); 84 } else 85 return (isc__errno2result(errno)); 86 } 87 88 isc_result_t 89 isc_stdio_read(void *ptr, size_t size, size_t nmemb, FILE *f, size_t *nret) { 90 isc_result_t result = ISC_R_SUCCESS; 91 size_t r; 92 93 clearerr(f); 94 r = fread(ptr, size, nmemb, f); 95 if (r != nmemb) { 96 if (feof(f)) 97 result = ISC_R_EOF; 98 else 99 result = isc__errno2result(errno); 100 } 101 if (nret != NULL) 102 *nret = r; 103 return (result); 104 } 105 106 isc_result_t 107 isc_stdio_write(const void *ptr, size_t size, size_t nmemb, FILE *f, 108 size_t *nret) 109 { 110 isc_result_t result = ISC_R_SUCCESS; 111 size_t r; 112 113 clearerr(f); 114 r = fwrite(ptr, size, nmemb, f); 115 if (r != nmemb) 116 result = isc__errno2result(errno); 117 if (nret != NULL) 118 *nret = r; 119 return (result); 120 } 121 122 isc_result_t 123 isc_stdio_flush(FILE *f) { 124 int r; 125 126 r = fflush(f); 127 if (r == 0) 128 return (ISC_R_SUCCESS); 129 else 130 return (isc__errno2result(errno)); 131 } 132 133 /* 134 * OpenBSD has deprecated ENOTSUP in favor of EOPNOTSUPP. 135 */ 136 #if defined(EOPNOTSUPP) && !defined(ENOTSUP) 137 #define ENOTSUP EOPNOTSUPP 138 #endif 139 140 isc_result_t 141 isc_stdio_sync(FILE *f) { 142 int r; 143 144 r = fsync(fileno(f)); 145 /* 146 * fsync is not supported on sockets and pipes which 147 * result in EINVAL / ENOTSUP. 148 */ 149 if (r == 0 || errno == EINVAL || errno == ENOTSUP) 150 return (ISC_R_SUCCESS); 151 else 152 return (isc__errno2result(errno)); 153 } 154 155