1 /* 2 * Copyright (c) 2016-2020, Przemyslaw Skibinski, Yann Collet, Facebook, Inc. 3 * All rights reserved. 4 * 5 * This source code is licensed under both the BSD-style license (found in the 6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found 7 * in the COPYING file in the root directory of this source tree). 8 * You may select, at your option, one of the above-listed licenses. 9 */ 10 11 #ifndef UTIL_H_MODULE 12 #define UTIL_H_MODULE 13 14 #if defined (__cplusplus) 15 extern "C" { 16 #endif 17 18 19 /*-**************************************** 20 * Dependencies 21 ******************************************/ 22 #include "platform.h" /* PLATFORM_POSIX_VERSION, ZSTD_NANOSLEEP_SUPPORT, ZSTD_SETPRIORITY_SUPPORT */ 23 #include <stddef.h> /* size_t, ptrdiff_t */ 24 #include <sys/types.h> /* stat, utime */ 25 #include <sys/stat.h> /* stat, chmod */ 26 #include "../lib/common/mem.h" /* U64 */ 27 28 29 /*-************************************************************ 30 * Avoid fseek()'s 2GiB barrier with MSVC, macOS, *BSD, MinGW 31 ***************************************************************/ 32 #if defined(_MSC_VER) && (_MSC_VER >= 1400) 33 # define UTIL_fseek _fseeki64 34 #elif !defined(__64BIT__) && (PLATFORM_POSIX_VERSION >= 200112L) /* No point defining Large file for 64 bit */ 35 # define UTIL_fseek fseeko 36 #elif defined(__MINGW32__) && defined(__MSVCRT__) && !defined(__STRICT_ANSI__) && !defined(__NO_MINGW_LFS) 37 # define UTIL_fseek fseeko64 38 #else 39 # define UTIL_fseek fseek 40 #endif 41 42 43 /*-************************************************* 44 * Sleep & priority functions: Windows - Posix - others 45 ***************************************************/ 46 #if defined(_WIN32) 47 # include <windows.h> 48 # define SET_REALTIME_PRIORITY SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS) 49 # define UTIL_sleep(s) Sleep(1000*s) 50 # define UTIL_sleepMilli(milli) Sleep(milli) 51 52 #elif PLATFORM_POSIX_VERSION > 0 /* Unix-like operating system */ 53 # include <unistd.h> /* sleep */ 54 # define UTIL_sleep(s) sleep(s) 55 # if ZSTD_NANOSLEEP_SUPPORT /* necessarily defined in platform.h */ 56 # define UTIL_sleepMilli(milli) { struct timespec t; t.tv_sec=0; t.tv_nsec=milli*1000000ULL; nanosleep(&t, NULL); } 57 # else 58 # define UTIL_sleepMilli(milli) /* disabled */ 59 # endif 60 # if ZSTD_SETPRIORITY_SUPPORT 61 # include <sys/resource.h> /* setpriority */ 62 # define SET_REALTIME_PRIORITY setpriority(PRIO_PROCESS, 0, -20) 63 # else 64 # define SET_REALTIME_PRIORITY /* disabled */ 65 # endif 66 67 #else /* unknown non-unix operating systen */ 68 # define UTIL_sleep(s) /* disabled */ 69 # define UTIL_sleepMilli(milli) /* disabled */ 70 # define SET_REALTIME_PRIORITY /* disabled */ 71 #endif 72 73 74 /*-**************************************** 75 * Compiler specifics 76 ******************************************/ 77 #if defined(__INTEL_COMPILER) 78 # pragma warning(disable : 177) /* disable: message #177: function was declared but never referenced, useful with UTIL_STATIC */ 79 #endif 80 #if defined(__GNUC__) 81 # define UTIL_STATIC static __attribute__((unused)) 82 #elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) 83 # define UTIL_STATIC static inline 84 #elif defined(_MSC_VER) 85 # define UTIL_STATIC static __inline 86 #else 87 # define UTIL_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */ 88 #endif 89 90 91 /*-**************************************** 92 * Console log 93 ******************************************/ 94 extern int g_utilDisplayLevel; 95 96 /** 97 * Displays a message prompt and returns success (0) if first character from stdin 98 * matches any from acceptableLetters. Otherwise, returns failure (1) and displays abortMsg. 99 * If any of the inputs are stdin itself, then automatically return failure (1). 100 */ 101 int UTIL_requireUserConfirmation(const char* prompt, const char* abortMsg, const char* acceptableLetters, int hasStdinInput); 102 103 104 /*-**************************************** 105 * File functions 106 ******************************************/ 107 #if defined(_MSC_VER) 108 typedef struct __stat64 stat_t; 109 typedef int mode_t; 110 #elif defined(__MINGW32__) && defined (__MSVCRT__) 111 typedef struct _stati64 stat_t; 112 #else 113 typedef struct stat stat_t; 114 #endif 115 116 #if defined(_MSC_VER) || defined(__MINGW32__) || defined (__MSVCRT__) /* windows support */ 117 #define PATH_SEP '\\' 118 #define STRDUP(s) _strdup(s) 119 #else 120 #define PATH_SEP '/' 121 #include <libgen.h> 122 #define STRDUP(s) strdup(s) 123 #endif 124 125 /** 126 * Calls platform's equivalent of stat() on filename and writes info to statbuf. 127 * Returns success (1) or failure (0). 128 */ 129 int UTIL_stat(const char* filename, stat_t* statbuf); 130 131 /** 132 * Instead of getting a file's stats, this updates them with the info in the 133 * provided stat_t. Currently sets owner, group, atime, and mtime. Will only 134 * update this info for regular files. 135 */ 136 int UTIL_setFileStat(const char* filename, const stat_t* statbuf); 137 138 /* 139 * These helpers operate on a pre-populated stat_t, i.e., the result of 140 * calling one of the above functions. 141 */ 142 143 int UTIL_isRegularFileStat(const stat_t* statbuf); 144 int UTIL_isDirectoryStat(const stat_t* statbuf); 145 int UTIL_isFIFOStat(const stat_t* statbuf); 146 U64 UTIL_getFileSizeStat(const stat_t* statbuf); 147 148 /** 149 * Like chmod(), but only modifies regular files. Provided statbuf may be NULL, 150 * in which case this function will stat() the file internally, in order to 151 * check whether it should be modified. 152 */ 153 int UTIL_chmod(char const* filename, const stat_t* statbuf, mode_t permissions); 154 155 /* 156 * In the absence of a pre-existing stat result on the file in question, these 157 * functions will do a stat() call internally and then use that result to 158 * compute the needed information. 159 */ 160 161 int UTIL_isRegularFile(const char* infilename); 162 int UTIL_isDirectory(const char* infilename); 163 int UTIL_isSameFile(const char* file1, const char* file2); 164 int UTIL_isCompressedFile(const char* infilename, const char *extensionList[]); 165 int UTIL_isLink(const char* infilename); 166 int UTIL_isFIFO(const char* infilename); 167 168 #define UTIL_FILESIZE_UNKNOWN ((U64)(-1)) 169 U64 UTIL_getFileSize(const char* infilename); 170 U64 UTIL_getTotalFileSize(const char* const * fileNamesTable, unsigned nbFiles); 171 172 int UTIL_compareStr(const void *p1, const void *p2); 173 const char* UTIL_getFileExtension(const char* infilename); 174 void UTIL_mirrorSourceFilesDirectories(const char** fileNamesTable, unsigned int nbFiles, const char *outDirName); 175 char* UTIL_createMirroredDestDirName(const char* srcFileName, const char* outDirRootName); 176 177 178 179 /*-**************************************** 180 * Lists of Filenames 181 ******************************************/ 182 183 typedef struct 184 { const char** fileNames; 185 char* buf; /* fileNames are stored in this buffer (or are read-only) */ 186 size_t tableSize; /* nb of fileNames */ 187 size_t tableCapacity; 188 } FileNamesTable; 189 190 /*! UTIL_createFileNamesTable_fromFileName() : 191 * read filenames from @inputFileName, and store them into returned object. 192 * @return : a FileNamesTable*, or NULL in case of error (ex: @inputFileName doesn't exist). 193 * Note: inputFileSize must be less than 50MB 194 */ 195 FileNamesTable* 196 UTIL_createFileNamesTable_fromFileName(const char* inputFileName); 197 198 /*! UTIL_assembleFileNamesTable() : 199 * This function takes ownership of its arguments, @filenames and @buf, 200 * and store them inside the created object. 201 * note : this function never fails, 202 * it will rather exit() the program if internal allocation fails. 203 * @return : resulting FileNamesTable* object. 204 */ 205 FileNamesTable* 206 UTIL_assembleFileNamesTable(const char** filenames, size_t tableSize, char* buf); 207 208 /*! UTIL_freeFileNamesTable() : 209 * This function is compatible with NULL argument and never fails. 210 */ 211 void UTIL_freeFileNamesTable(FileNamesTable* table); 212 213 /*! UTIL_mergeFileNamesTable(): 214 * @return : FileNamesTable*, concatenation of @table1 and @table2 215 * note: @table1 and @table2 are consumed (freed) by this operation 216 */ 217 FileNamesTable* 218 UTIL_mergeFileNamesTable(FileNamesTable* table1, FileNamesTable* table2); 219 220 221 /*! UTIL_expandFNT() : 222 * read names from @fnt, and expand those corresponding to directories 223 * update @fnt, now containing only file names, 224 * @return : 0 in case of success, 1 if error 225 * note : in case of error, @fnt[0] is NULL 226 */ 227 void UTIL_expandFNT(FileNamesTable** fnt, int followLinks); 228 229 /*! UTIL_createFNT_fromROTable() : 230 * copy the @filenames pointer table inside the returned object. 231 * The names themselves are still stored in their original buffer, which must outlive the object. 232 * @return : a FileNamesTable* object, 233 * or NULL in case of error 234 */ 235 FileNamesTable* 236 UTIL_createFNT_fromROTable(const char** filenames, size_t nbFilenames); 237 238 /*! UTIL_allocateFileNamesTable() : 239 * Allocates a table of const char*, to insert read-only names later on. 240 * The created FileNamesTable* doesn't hold a buffer. 241 * @return : FileNamesTable*, or NULL, if allocation fails. 242 */ 243 FileNamesTable* UTIL_allocateFileNamesTable(size_t tableSize); 244 245 246 /*! UTIL_refFilename() : 247 * Add a reference to read-only name into @fnt table. 248 * As @filename is only referenced, its lifetime must outlive @fnt. 249 * Internal table must be large enough to reference a new member, 250 * otherwise its UB (protected by an `assert()`). 251 */ 252 void UTIL_refFilename(FileNamesTable* fnt, const char* filename); 253 254 255 /* UTIL_createExpandedFNT() is only active if UTIL_HAS_CREATEFILELIST is defined. 256 * Otherwise, UTIL_createExpandedFNT() is a shell function which does nothing 257 * apart from displaying a warning message. 258 */ 259 #ifdef _WIN32 260 # define UTIL_HAS_CREATEFILELIST 261 #elif defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */ 262 # define UTIL_HAS_CREATEFILELIST 263 # define UTIL_HAS_MIRRORFILELIST 264 #else 265 /* do not define UTIL_HAS_CREATEFILELIST */ 266 #endif 267 268 /*! UTIL_createExpandedFNT() : 269 * read names from @filenames, and expand those corresponding to directories. 270 * links are followed or not depending on @followLinks directive. 271 * @return : an expanded FileNamesTable*, where each name is a file 272 * or NULL in case of error 273 */ 274 FileNamesTable* 275 UTIL_createExpandedFNT(const char** filenames, size_t nbFilenames, int followLinks); 276 277 278 /*-**************************************** 279 * System 280 ******************************************/ 281 282 int UTIL_countPhysicalCores(void); 283 284 285 #if defined (__cplusplus) 286 } 287 #endif 288 289 #endif /* UTIL_H_MODULE */ 290