1 /* Licensed to the Apache Software Foundation (ASF) under one or more 2 * contributor license agreements. See the NOTICE file distributed with 3 * this work for additional information regarding copyright ownership. 4 * The ASF licenses this file to You under the Apache License, Version 2.0 5 * (the "License"); you may not use this file except in compliance with 6 * the License. You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef FILE_IO_H 18 #define FILE_IO_H 19 20 #include "apr.h" 21 #include "apr_private.h" 22 #include "apr_pools.h" 23 #include "apr_general.h" 24 #include "apr_tables.h" 25 #include "apr_thread_mutex.h" 26 #include "apr_file_io.h" 27 #include "apr_file_info.h" 28 #include "apr_errno.h" 29 #include "apr_arch_misc.h" 30 #include "apr_poll.h" 31 32 #ifdef HAVE_SYS_STAT_H 33 #include <sys/stat.h> 34 #endif 35 #if APR_HAVE_SYS_TYPES_H 36 #include <sys/types.h> 37 #endif 38 #ifdef HAVE_SYS_FCNTL_H 39 #include <fcntl.h> 40 #endif 41 #ifdef HAVE_TIME_H 42 #include <time.h> 43 #endif 44 #if APR_HAVE_DIRENT_H 45 #include <dirent.h> 46 #endif 47 #ifdef HAVE_MALLOC_H 48 #include <malloc.h> 49 #endif 50 51 #if APR_HAS_UNICODE_FS 52 #include "arch/win32/apr_arch_utf8.h" 53 #include <wchar.h> 54 55 /* Helper functions for the WinNT ApiW() functions. APR treats all 56 * resource identifiers (files, etc) by their UTF-8 name, to provide 57 * access to all named identifiers. [UTF-8 completely maps Unicode 58 * into char type strings.] 59 * 60 * The _path flavors below provide us fast mappings of the 61 * Unicode filename //?/D:/path and //?/UNC/mach/share/path mappings, 62 * which allow unlimited (well, 32000 wide character) length names. 63 * These prefixes may appear in Unicode, but must not appear in the 64 * Ascii API calls. So we tack them on in utf8_to_unicode_path, and 65 * strip them right back off in unicode_to_utf8_path. 66 */ 67 apr_status_t utf8_to_unicode_path(apr_wchar_t* dststr, apr_size_t dstchars, 68 const char* srcstr); 69 apr_status_t unicode_to_utf8_path(char* dststr, apr_size_t dstchars, 70 const apr_wchar_t* srcstr); 71 72 #endif /* APR_HAS_UNICODE_FS */ 73 74 /* Another Helper functions for the WinNT ApiW() functions. We need to 75 * derive some 'resource' names (max length 255 characters, prefixed with 76 * Global/ or Local/ on WinNT) from something that looks like a filename. 77 * Since 'resource' names never contain slashes, convert these to '_'s 78 * and return the appropriate char* or wchar* for ApiA or ApiW calls. 79 */ 80 81 void *res_name_from_filename(const char *file, int global, apr_pool_t *pool); 82 83 #define APR_FILE_MAX MAX_PATH 84 85 #define APR_FILE_DEFAULT_BUFSIZE 4096 86 /* For backwards-compat */ 87 #define APR_FILE_BUFSIZE APR_FILE_DEFAULT_BUFSIZE 88 89 /* obscure ommissions from msvc's sys/stat.h */ 90 #ifdef _MSC_VER 91 #define S_IFIFO _S_IFIFO /* pipe */ 92 #define S_IFBLK 0060000 /* Block Special */ 93 #define S_IFLNK 0120000 /* Symbolic Link */ 94 #define S_IFSOCK 0140000 /* Socket */ 95 #define S_IFWHT 0160000 /* Whiteout */ 96 #endif 97 98 /* Internal Flags for apr_file_open */ 99 #define APR_OPENINFO 0x00100000 /* Open without READ or WRITE access */ 100 #define APR_OPENLINK 0x00200000 /* Open a link itself, if supported */ 101 #define APR_READCONTROL 0x00400000 /* Read the file's owner/perms */ 102 #define APR_WRITECONTROL 0x00800000 /* Modify the file's owner/perms */ 103 /* #define APR_INHERIT 0x01000000 -- Defined in apr_arch_inherit.h! */ 104 #define APR_STDIN_FLAG 0x02000000 /* Obtained via apr_file_open_stdin() */ 105 #define APR_STDOUT_FLAG 0x04000000 /* Obtained via apr_file_open_stdout() */ 106 #define APR_STDERR_FLAG 0x06000000 /* Obtained via apr_file_open_stderr() */ 107 #define APR_STD_FLAGS (APR_STDIN_FLAG | APR_STDOUT_FLAG | APR_STDERR_FLAG) 108 #define APR_WRITEATTRS 0x08000000 /* Modify the file's attributes */ 109 110 /* Entries missing from the MSVC 5.0 Win32 SDK: 111 */ 112 #ifndef FILE_ATTRIBUTE_DEVICE 113 #define FILE_ATTRIBUTE_DEVICE 0x00000040 114 #endif 115 #ifndef FILE_ATTRIBUTE_REPARSE_POINT 116 #define FILE_ATTRIBUTE_REPARSE_POINT 0x00000400 117 #endif 118 #ifndef FILE_FLAG_OPEN_NO_RECALL 119 #define FILE_FLAG_OPEN_NO_RECALL 0x00100000 120 #endif 121 #ifndef FILE_FLAG_OPEN_REPARSE_POINT 122 #define FILE_FLAG_OPEN_REPARSE_POINT 0x00200000 123 #endif 124 #ifndef TRUSTEE_IS_WELL_KNOWN_GROUP 125 #define TRUSTEE_IS_WELL_KNOWN_GROUP 5 126 #endif 127 128 /* Information bits available from the WIN32 FindFirstFile function */ 129 #define APR_FINFO_WIN32_DIR (APR_FINFO_NAME | APR_FINFO_TYPE \ 130 | APR_FINFO_CTIME | APR_FINFO_ATIME \ 131 | APR_FINFO_MTIME | APR_FINFO_SIZE) 132 133 /* Sneak the Readonly bit through finfo->protection for internal use _only_ */ 134 #define APR_FREADONLY 0x10000000 135 136 /* Private function for apr_stat/lstat/getfileinfo/dir_read */ 137 int fillin_fileinfo(apr_finfo_t *finfo, WIN32_FILE_ATTRIBUTE_DATA *wininfo, 138 int byhandle, apr_int32_t wanted); 139 140 /* Private function that extends apr_stat/lstat/getfileinfo/dir_read */ 141 apr_status_t more_finfo(apr_finfo_t *finfo, const void *ufile, 142 apr_int32_t wanted, int whatfile); 143 144 /* whatfile types for the ufile arg */ 145 #define MORE_OF_HANDLE 0 146 #define MORE_OF_FSPEC 1 147 #define MORE_OF_WFSPEC 2 148 149 /* quick run-down of fields in windows' apr_file_t structure that may have 150 * obvious uses. 151 * fname -- the filename as passed to the open call. 152 * dwFileAttricutes -- Attributes used to open the file. 153 * append -- Windows doesn't support the append concept when opening files. 154 * APR needs to keep track of this, and always make sure we append 155 * correctly when writing to a file with this flag set TRUE. 156 */ 157 158 /* for apr_poll.c */ 159 #define filedes filehand 160 161 struct apr_file_t { 162 apr_pool_t *pool; 163 HANDLE filehand; 164 BOOLEAN pipe; /* Is this a pipe of a file? */ 165 OVERLAPPED *pOverlapped; 166 apr_interval_time_t timeout; 167 apr_int32_t flags; 168 169 /* File specific info */ 170 apr_finfo_t *finfo; 171 char *fname; 172 DWORD dwFileAttributes; 173 int eof_hit; 174 BOOLEAN buffered; /* Use buffered I/O? */ 175 int ungetchar; /* Last char provided by an unget op. (-1 = no char) */ 176 int append; 177 178 /* Stuff for buffered mode */ 179 char *buffer; 180 apr_size_t bufpos; /* Read/Write position in buffer */ 181 apr_size_t bufsize; /* The size of the buffer */ 182 apr_size_t dataRead; /* amount of valid data read into buffer */ 183 int direction; /* buffer being used for 0 = read, 1 = write */ 184 apr_off_t filePtr; /* position in file of handle */ 185 apr_thread_mutex_t *mutex; /* mutex semaphore, must be owned to access 186 * the above fields */ 187 188 #if APR_FILES_AS_SOCKETS 189 /* if there is a timeout set, then this pollset is used */ 190 apr_pollset_t *pollset; 191 #endif 192 /* Pipe specific info */ 193 }; 194 195 struct apr_dir_t { 196 apr_pool_t *pool; 197 HANDLE dirhand; 198 apr_size_t rootlen; 199 char *dirname; 200 char *name; 201 union { 202 #if APR_HAS_UNICODE_FS 203 struct { 204 WIN32_FIND_DATAW *entry; 205 } w; 206 #endif 207 #if APR_HAS_ANSI_FS 208 struct { 209 WIN32_FIND_DATAA *entry; 210 } n; 211 #endif 212 }; 213 int bof; 214 }; 215 216 /* There are many goofy characters the filesystem can't accept 217 * or can confound the cmd.exe shell. Here's the list 218 * [declared in filesys.c] 219 */ 220 extern const char apr_c_is_fnchar[256]; 221 222 #define IS_FNCHAR(c) (apr_c_is_fnchar[(unsigned char)(c)] & 1) 223 #define IS_SHCHAR(c) ((apr_c_is_fnchar[(unsigned char)(c)] & 2) == 2) 224 225 226 /* If the user passes APR_FILEPATH_TRUENAME to either 227 * apr_filepath_root or apr_filepath_merge, this fn determines 228 * that the root really exists. It's expensive, wouldn't want 229 * to do this too frequenly. 230 */ 231 apr_status_t filepath_root_test(char *path, apr_pool_t *p); 232 233 234 /* The apr_filepath_merge wants to canonicalize the cwd to the 235 * addpath if the user passes NULL as the old root path (this 236 * isn't true of an empty string "", which won't be concatenated. 237 * 238 * But we need to figure out what the cwd of a given volume is, 239 * when the user passes D:foo. This fn will determine D:'s cwd. 240 * 241 * If flags includes the bit APR_FILEPATH_NATIVE, the path returned 242 * is in the os-native format. 243 */ 244 apr_status_t filepath_drive_get(char **rootpath, char drive, 245 apr_int32_t flags, apr_pool_t *p); 246 247 248 /* If the user passes d: vs. D: (or //mach/share vs. //MACH/SHARE), 249 * we need to fold the case to canonical form. This function is 250 * supposed to do so. 251 */ 252 apr_status_t filepath_root_case(char **rootpath, char *root, apr_pool_t *p); 253 254 255 apr_status_t file_cleanup(void *); 256 257 extern apr_status_t 258 apr_file_socket_pipe_create(apr_file_t **in, 259 apr_file_t **out, 260 apr_pool_t *p); 261 262 extern apr_status_t 263 apr_file_socket_pipe_close(apr_file_t *file); 264 265 #endif /* ! FILE_IO_H */ 266