1 /****************************************************************************** 2 * 3 * Module Name: oswindir - Windows directory access interfaces 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44 #include <acpi.h> 45 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <io.h> 50 51 typedef struct ExternalFindInfo 52 { 53 struct _finddata_t DosInfo; 54 char *FullWildcardSpec; 55 long FindHandle; 56 char State; 57 char RequestedFileType; 58 59 } EXTERNAL_FIND_INFO; 60 61 62 /******************************************************************************* 63 * 64 * FUNCTION: AcpiOsOpenDirectory 65 * 66 * PARAMETERS: DirPathname - Full pathname to the directory 67 * WildcardSpec - string of the form "*.c", etc. 68 * RequestedFileType - Either a directory or normal file 69 * 70 * RETURN: A directory "handle" to be used in subsequent search operations. 71 * NULL returned on failure. 72 * 73 * DESCRIPTION: Open a directory in preparation for a wildcard search 74 * 75 ******************************************************************************/ 76 77 void * 78 AcpiOsOpenDirectory ( 79 char *DirPathname, 80 char *WildcardSpec, 81 char RequestedFileType) 82 { 83 long FindHandle; 84 char *FullWildcardSpec; 85 EXTERNAL_FIND_INFO *SearchInfo; 86 87 88 /* No directory path means "use current directory" - use a dot */ 89 90 if (!DirPathname || strlen (DirPathname) == 0) 91 { 92 DirPathname = "."; 93 } 94 95 /* Allocate the info struct that will be returned to the caller */ 96 97 SearchInfo = calloc (sizeof (EXTERNAL_FIND_INFO), 1); 98 if (!SearchInfo) 99 { 100 return (NULL); 101 } 102 103 /* Allocate space for the full wildcard path */ 104 105 FullWildcardSpec = calloc ( 106 strlen (DirPathname) + strlen (WildcardSpec) + 2, 1); 107 if (!FullWildcardSpec) 108 { 109 printf ("Could not allocate buffer for wildcard pathname\n"); 110 free (SearchInfo); 111 return (NULL); 112 } 113 114 /* Create the full wildcard path */ 115 116 strcpy (FullWildcardSpec, DirPathname); 117 strcat (FullWildcardSpec, "/"); 118 strcat (FullWildcardSpec, WildcardSpec); 119 120 /* Initialize the find functions, get first match */ 121 122 FindHandle = _findfirst (FullWildcardSpec, &SearchInfo->DosInfo); 123 if (FindHandle == -1) 124 { 125 /* Failure means that no match was found */ 126 127 free (FullWildcardSpec); 128 free (SearchInfo); 129 return (NULL); 130 } 131 132 /* Save the info in the return structure */ 133 134 SearchInfo->RequestedFileType = RequestedFileType; 135 SearchInfo->FullWildcardSpec = FullWildcardSpec; 136 SearchInfo->FindHandle = FindHandle; 137 SearchInfo->State = 0; 138 return (SearchInfo); 139 } 140 141 142 /******************************************************************************* 143 * 144 * FUNCTION: AcpiOsGetNextFilename 145 * 146 * PARAMETERS: DirHandle - Created via AcpiOsOpenDirectory 147 * 148 * RETURN: Next filename matched. NULL if no more matches. 149 * 150 * DESCRIPTION: Get the next file in the directory that matches the wildcard 151 * specification. 152 * 153 ******************************************************************************/ 154 155 char * 156 AcpiOsGetNextFilename ( 157 void *DirHandle) 158 { 159 EXTERNAL_FIND_INFO *SearchInfo = DirHandle; 160 int Status; 161 char FileTypeNotMatched = 1; 162 163 164 /* 165 * Loop while we have matched files but not found any files of 166 * the requested type. 167 */ 168 while (FileTypeNotMatched) 169 { 170 /* On the first call, we already have the first match */ 171 172 if (SearchInfo->State == 0) 173 { 174 /* No longer the first match */ 175 176 SearchInfo->State = 1; 177 } 178 else 179 { 180 /* Get the next match */ 181 182 Status = _findnext (SearchInfo->FindHandle, &SearchInfo->DosInfo); 183 if (Status != 0) 184 { 185 return (NULL); 186 } 187 } 188 189 /* 190 * Found a match, now check to make sure that the file type 191 * matches the requested file type (directory or normal file) 192 * 193 * NOTE: use of the attrib field saves us from doing a very 194 * expensive stat() on the file! 195 */ 196 switch (SearchInfo->RequestedFileType) 197 { 198 case REQUEST_FILE_ONLY: 199 200 /* Anything other than A_SUBDIR is OK */ 201 202 if (!(SearchInfo->DosInfo.attrib & _A_SUBDIR)) 203 { 204 FileTypeNotMatched = 0; 205 } 206 break; 207 208 case REQUEST_DIR_ONLY: 209 210 /* Must have A_SUBDIR bit set */ 211 212 if (SearchInfo->DosInfo.attrib & _A_SUBDIR) 213 { 214 FileTypeNotMatched = 0; 215 } 216 break; 217 218 default: 219 220 return (NULL); 221 } 222 } 223 224 return (SearchInfo->DosInfo.name); 225 } 226 227 228 /******************************************************************************* 229 * 230 * FUNCTION: AcpiOsCloseDirectory 231 * 232 * PARAMETERS: DirHandle - Created via AcpiOsOpenDirectory 233 * 234 * RETURN: None 235 * 236 * DESCRIPTION: Close the open directory and cleanup. 237 * 238 ******************************************************************************/ 239 240 void 241 AcpiOsCloseDirectory ( 242 void *DirHandle) 243 { 244 EXTERNAL_FIND_INFO *SearchInfo = DirHandle; 245 246 247 /* Close the directory and free allocations */ 248 249 _findclose (SearchInfo->FindHandle); 250 free (SearchInfo->FullWildcardSpec); 251 free (DirHandle); 252 } 253