/* $Id$ */ /** @file fileio.cpp Standard In/Out file operations */ #include "stdafx.h" #include "fileio_func.h" #include "variables.h" #include "debug.h" #include "fios.h" #include "string_func.h" #include "tar_type.h" #ifdef WIN32 #include <windows.h> #else #include <pwd.h> #endif #include <sys/stat.h> #include <algorithm> /*************************************************/ /* FILE IO ROUTINES ******************************/ /*************************************************/ #define FIO_BUFFER_SIZE 512 struct Fio { byte *buffer, *buffer_end; ///< position pointer in local buffer and last valid byte of buffer size_t pos; ///< current (system) position in file FILE *cur_fh; ///< current file handle const char *filename; ///< current filename FILE *handles[MAX_FILE_SLOTS]; ///< array of file handles we can have open byte buffer_start[FIO_BUFFER_SIZE]; ///< local buffer when read from file const char *filenames[MAX_FILE_SLOTS]; ///< array of filenames we (should) have open char *shortnames[MAX_FILE_SLOTS];///< array of short names for spriteloader's use #if defined(LIMITED_FDS) uint open_handles; ///< current amount of open handles uint usage_count[MAX_FILE_SLOTS]; ///< count how many times this file has been opened #endif /* LIMITED_FDS */ }; static Fio _fio; /* Get current position in file */ size_t FioGetPos() { return _fio.pos + (_fio.buffer - _fio.buffer_end); } const char *FioGetFilename(uint8 slot) { return _fio.shortnames[slot]; } void FioSeekTo(size_t pos, int mode) { if (mode == SEEK_CUR) pos += FioGetPos(); _fio.buffer = _fio.buffer_end = _fio.buffer_start + FIO_BUFFER_SIZE; _fio.pos = pos; fseek(_fio.cur_fh, _fio.pos, SEEK_SET); } #if defined(LIMITED_FDS) static void FioRestoreFile(int slot) { /* Do we still have the file open, or should we reopen it? */ if (_fio.handles[slot] == NULL) { DEBUG(misc, 6, "Restoring file '%s' in slot '%d' from disk", _fio.filenames[slot], slot); FioOpenFile(slot, _fio.filenames[slot]); } _fio.usage_count[slot]++; } #endif /* LIMITED_FDS */ /* Seek to a file and a position */ void FioSeekToFile(uint8 slot, size_t pos) { FILE *f; #if defined(LIMITED_FDS) /* Make sure we have this file open */ FioRestoreFile(slot); #endif /* LIMITED_FDS */ f = _fio.handles[slot]; assert(f != NULL); _fio.cur_fh = f; _fio.filename = _fio.filenames[slot]; FioSeekTo(pos, SEEK_SET); } byte FioReadByte() { if (_fio.buffer == _fio.buffer_end) { _fio.buffer = _fio.buffer_start; size_t size = fread(_fio.buffer, 1, FIO_BUFFER_SIZE, _fio.cur_fh); _fio.pos += size; _fio.buffer_end = _fio.buffer_start + size; if (size == 0) return 0; } return *_fio.buffer++; } void FioSkipBytes(int n) { for (;;) { int m = min(_fio.buffer_end - _fio.buffer, n); _fio.buffer += m; n -= m; if (n == 0) break; FioReadByte(); n--; } } uint16 FioReadWord() { byte b = FioReadByte(); return (FioReadByte() << 8) | b; } uint32 FioReadDword() { uint b = FioReadWord(); return (FioReadWord() << 16) | b; } void FioReadBlock(void *ptr, size_t size) { FioSeekTo(FioGetPos(), SEEK_SET); _fio.pos += fread(ptr, 1, size, _fio.cur_fh); } static inline void FioCloseFile(int slot) { if (_fio.handles[slot] != NULL) { fclose(_fio.handles[slot]); free(_fio.shortnames[slot]); _fio.shortnames[slot] = NULL; _fio.handles[slot] = NULL; #if defined(LIMITED_FDS) _fio.open_handles--; #endif /* LIMITED_FDS */ } } void FioCloseAll() { int i; for (i = 0; i != lengthof(_fio.handles); i++) FioCloseFile(i); } #if defined(LIMITED_FDS) static void FioFreeHandle() { /* If we are about to open a file that will exceed the limit, close a file */ if (_fio.open_handles + 1 == LIMITED_FDS) { uint i, count; int slot; count = UINT_MAX; slot = -1; /* Find the file that is used the least */ for (i = 0; i < lengthof(_fio.handles); i++) { if (_fio.handles[i] != NULL && _fio.usage_count[i] < count) { count = _fio.usage_count[i]; slot = i; } } assert(slot != -1); DEBUG(misc, 6, "Closing filehandler '%s' in slot '%d' because of fd-limit", _fio.filenames[slot], slot); FioCloseFile(slot); } } #endif /* LIMITED_FDS */ void FioOpenFile(int slot, const char *filename) { FILE *f; #if defined(LIMITED_FDS) FioFreeHandle(); #endif /* LIMITED_FDS */ f = FioFOpenFile(filename); if (f == NULL) usererror("Cannot open file '%s'", filename); uint32 pos = ftell(f); FioCloseFile(slot); // if file was opened before, close it _fio.handles[slot] = f; _fio.filenames[slot] = filename; /* Store the filename without path and extension */ const char *t = strrchr(filename, PATHSEPCHAR); _fio.shortnames[slot] = strdup(t == NULL ? filename : t); char *t2 = strrchr(_fio.shortnames[slot], '.'); if (t2 != NULL) *t2 = '\0'; strtolower(_fio.shortnames[slot]); #if defined(LIMITED_FDS) _fio.usage_count[slot] = 0; _fio.open_handles++; #endif /* LIMITED_FDS */ FioSeekToFile(slot, pos); } const char *_subdirs[NUM_SUBDIRS] = { "", "save" PATHSEP, "save" PATHSEP "autosave" PATHSEP, "scenario" PATHSEP, "scenario" PATHSEP "heightmap" PATHSEP, "gm" PATHSEP, "data" PATHSEP, "lang" PATHSEP, "ai" PATHSEP, "ai" PATHSEP "library" PATHSEP, }; const char *_searchpaths[NUM_SEARCHPATHS]; TarList _tar_list; TarFileList _tar_filelist; typedef std::map<std::string, std::string> TarLinkList; static TarLinkList _tar_linklist; ///< List of directory links /** * Check whether the given file exists * @param filename the file to try for existance * @param subdir the subdirectory to look in * @return true if and only if the file can be opened */ bool FioCheckFileExists(const char *filename, Subdirectory subdir) { FILE *f = FioFOpenFile(filename, "rb", subdir); if (f == NULL) return false; FioFCloseFile(f); return true; } /** * Close a file in a safe way. */ void FioFCloseFile(FILE *f) { fclose(f); } char *FioGetFullPath(char *buf, size_t buflen, Searchpath sp, Subdirectory subdir, const char *filename) { assert(subdir < NUM_SUBDIRS); assert(sp < NUM_SEARCHPATHS); snprintf(buf, buflen, "%s%s%s", _searchpaths[sp], _subdirs[subdir], filename); return buf; } char *FioFindFullPath(char *buf, size_t buflen, Subdirectory subdir, const char *filename) { Searchpath sp; assert(subdir < NUM_SUBDIRS); FOR_ALL_SEARCHPATHS(sp) { FioGetFullPath(buf, buflen, sp, subdir, filename); if (FileExists(buf)) break; } return buf; } char *FioAppendDirectory(char *buf, size_t buflen, Searchpath sp, Subdirectory subdir) { assert(subdir < NUM_SUBDIRS); assert(sp < NUM_SEARCHPATHS); snprintf(buf, buflen, "%s%s", _searchpaths[sp], _subdirs[subdir]); return buf; } char *FioGetDirectory(char *buf, size_t buflen, Subdirectory subdir) { Searchpath sp; /* Find and return the first valid directory */ FOR_ALL_SEARCHPATHS(sp) { char *ret = FioAppendDirectory(buf, buflen, sp, subdir); if (FileExists(buf)) return ret; } /* Could not find the directory, fall back to a base path */ ttd_strlcpy(buf, _personal_dir, buflen); return buf; } FILE *FioFOpenFileSp(const char *filename, const char *mode, Searchpath sp, Subdirectory subdir, size_t *filesize) { #if defined(WIN32) && defined(UNICODE) /* fopen is implemented as a define with ellipses for * Unicode support (prepend an L). As we are not sending * a string, but a variable, it 'renames' the variable, * so make that variable to makes it compile happily */ wchar_t Lmode[5]; MultiByteToWideChar(CP_ACP, 0, mode, -1, Lmode, lengthof(Lmode)); #endif FILE *f = NULL; char buf[MAX_PATH]; if (subdir == NO_DIRECTORY) { strecpy(buf, filename, lastof(buf)); } else { snprintf(buf, lengthof(buf), "%s%s%s", _searchpaths[sp], _subdirs[subdir], filename); } #if defined(WIN32) if (mode[0] == 'r' && GetFileAttributes(OTTD2FS(buf)) == INVALID_FILE_ATTRIBUTES) return NULL; #endif f = fopen(buf, mode); #if !defined(WIN32) if (f == NULL) { strtolower(buf + ((subdir == NO_DIRECTORY) ? 0 : strlen(_searchpaths[sp]) - 1)); f = fopen(buf, mode); } #endif if (f != NULL && filesize != NULL) { /* Find the size of the file */ fseek(f, 0, SEEK_END); *filesize = ftell(f); fseek(f, 0, SEEK_SET); } return f; } FILE *FioFOpenFileTar(TarFileListEntry *entry, size_t *filesize) { FILE *f = fopen(entry->tar_filename, "rb"); assert(f != NULL); fseek(f, entry->position, SEEK_SET); if (filesize != NULL) *filesize = entry->size; return f; } /** Opens OpenTTD files somewhere in a personal or global directory */ FILE *FioFOpenFile(const char *filename, const char *mode, Subdirectory subdir, size_t *filesize) { FILE *f = NULL; Searchpath sp; assert(subdir < NUM_SUBDIRS || subdir == NO_DIRECTORY); FOR_ALL_SEARCHPATHS(sp) { f = FioFOpenFileSp(filename, mode, sp, subdir, filesize); if (f != NULL || subdir == NO_DIRECTORY) break; } /* We can only use .tar in case of data-dir, and read-mode */ if (f == NULL && mode[0] == 'r') { static const uint MAX_RESOLVED_LENGTH = 2 * (100 + 100 + 155) + 1; // Enough space to hold two filenames plus link. See 'TarHeader'. char resolved_name[MAX_RESOLVED_LENGTH]; /* Filenames in tars are always forced to be lowercase */ strcpy(resolved_name, filename); strtolower(resolved_name); size_t resolved_len = strlen(resolved_name); /* Resolve ONE directory link */ for (TarLinkList::iterator link = _tar_linklist.begin(); link != _tar_linklist.end(); link++) { const std::string &src = link->first; size_t len = src.length(); if (resolved_len >= len && resolved_name[len - 1] == PATHSEPCHAR && strncmp(src.c_str(), resolved_name, len) == 0) { /* Apply link */ char resolved_name2[MAX_RESOLVED_LENGTH]; const std::string &dest = link->second; strcpy(resolved_name2, &(resolved_name[len])); strcpy(resolved_name, dest.c_str()); strcpy(&(resolved_name[dest.length()]), resolved_name2); break; // Only resolve one level } } TarFileList::iterator it = _tar_filelist.find(resolved_name); if (it != _tar_filelist.end()) { f = FioFOpenFileTar(&((*it).second), filesize); } } /* Sometimes a full path is given. To support * the 'subdirectory' must be 'removed'. */ if (f == NULL && subdir != NO_DIRECTORY) { f = FioFOpenFile(filename, mode, NO_DIRECTORY, filesize); } return f; } /** * Create a directory with the given name * @param name the new name of the directory */ void FioCreateDirectory(const char *name) { #if defined(WIN32) || defined(WINCE) CreateDirectory(OTTD2FS(name), NULL); #elif defined(OS2) && !defined(__INNOTEK_LIBC__) mkdir(OTTD2FS(name)); #elif defined(__MORPHOS__) || defined(__AMIGAOS__) char buf[MAX_PATH]; ttd_strlcpy(buf, name, MAX_PATH); size_t len = strlen(name) - 1; if (buf[len] == '/') { buf[len] = '\0'; // Kill pathsep, so mkdir() will not fail } mkdir(OTTD2FS(buf), 0755); #else mkdir(OTTD2FS(name), 0755); #endif } /** * Appends, if necessary, the path separator character to the end of the string. * It does not add the path separator to zero-sized strings. * @param buf string to append the separator to * @param buflen the length of the buf */ void AppendPathSeparator(char *buf, size_t buflen) { size_t s = strlen(buf); /* Length of string + path separator + '\0' */ if (s != 0 && buf[s - 1] != PATHSEPCHAR && s + 2 < buflen) { buf[s] = PATHSEPCHAR; buf[s + 1] = '\0'; } } /** * Allocates and files a variable with the full path * based on the given directory. * @param dir the directory to base the path on * @return the malloced full path */ char *BuildWithFullPath(const char *dir) { char *dest = MallocT<char>(MAX_PATH); ttd_strlcpy(dest, dir, MAX_PATH); /* Check if absolute or relative path */ const char *s = strchr(dest, PATHSEPCHAR); /* Add absolute path */ if (s == NULL || dest != s) { if (getcwd(dest, MAX_PATH) == NULL) *dest = '\0'; AppendPathSeparator(dest, MAX_PATH); ttd_strlcat(dest, dir, MAX_PATH); } AppendPathSeparator(dest, MAX_PATH); return dest; } const char *FioTarFirstDir(const char *tarname) { TarList::iterator it = _tar_list.find(tarname); if (it == _tar_list.end()) return NULL; return (*it).second.dirname; } static void TarAddLink(const std::string &srcParam, const std::string &destParam) { std::string src = srcParam; std::string dest = destParam; /* Tar internals assume lowercase */ std::transform(src.begin(), src.end(), src.begin(), tolower); std::transform(dest.begin(), dest.end(), dest.begin(), tolower); TarFileList::iterator dest_file = _tar_filelist.find(dest); if (dest_file != _tar_filelist.end()) { /* Link to file. Process the link like the destination file. */ _tar_filelist.insert(TarFileList::value_type(src, dest_file->second)); } else { /* Destination file not found. Assume 'link to directory' * Append PATHSEPCHAR to 'src' and 'dest' if needed */ const std::string src_path = ((*src.rbegin() == PATHSEPCHAR) ? src : src + PATHSEPCHAR); const std::string dst_path = (dest.length() == 0 ? "" : ((*dest.rbegin() == PATHSEPCHAR) ? dest : dest + PATHSEPCHAR)); _tar_linklist.insert(TarLinkList::value_type(src_path, dst_path)); } } void FioTarAddLink(const char *src, const char *dest) { TarAddLink(src, dest); } /** * Simplify filenames from tars. * Replace '/' by PATHSEPCHAR, and force 'name' to lowercase. * @param name Filename to process. */ static void SimplifyFileName(char *name) { /* Force lowercase */ strtolower(name); /* Tar-files always have '/' path-seperator, but we want our PATHSEPCHAR */ #if (PATHSEPCHAR != '/') for (char *n = name; *n != '\0'; n++) if (*n == '/') *n = PATHSEPCHAR; #endif } bool TarListAddFile(const char *filename) { /* The TAR-header, repeated for every file */ typedef struct TarHeader { char name[100]; ///< Name of the file char mode[8]; char uid[8]; char gid[8]; char size[12]; ///< Size of the file, in ASCII char mtime[12]; char chksum[8]; char typeflag; char linkname[100]; char magic[6]; char version[2]; char uname[32]; char gname[32]; char devmajor[8]; char devminor[8]; char prefix[155]; ///< Path of the file char unused[12]; } TarHeader; /* Check if we already seen this file */ TarList::iterator it = _tar_list.find(filename); if (it != _tar_list.end()) return false; FILE *f = fopen(filename, "rb"); assert(f != NULL); const char *dupped_filename = strdup(filename); _tar_list[filename].filename = dupped_filename; _tar_list[filename].dirname = NULL; TarLinkList links; ///< Temporary list to collect links TarHeader th; char buf[sizeof(th.name) + 1], *end; char name[sizeof(th.prefix) + 1 + sizeof(th.name) + 1]; char link[sizeof(th.linkname) + 1]; char dest[sizeof(th.prefix) + 1 + sizeof(th.name) + 1 + 1 + sizeof(th.linkname) + 1]; size_t num = 0, pos = 0; /* Make a char of 512 empty bytes */ char empty[512]; memset(&empty[0], 0, sizeof(empty)); for (;;) { // Note: feof() always returns 'false' after 'fseek()'. Cool, isn't it? size_t num_bytes_read = fread(&th, 1, 512, f); if (num_bytes_read != 512) break; pos += num_bytes_read; /* Check if we have the new tar-format (ustar) or the old one (a lot of zeros after 'link' field) */ if (strncmp(th.magic, "ustar", 5) != 0 && memcmp(&th.magic, &empty[0], 512 - offsetof(TarHeader, magic)) != 0) { /* If we have only zeros in the block, it can be an end-of-file indicator */ if (memcmp(&th, &empty[0], 512) == 0) continue; DEBUG(misc, 0, "The file '%s' isn't a valid tar-file", filename); return false; } name[0] = '\0'; size_t len = 0; /* The prefix contains the directory-name */ if (th.prefix[0] != '\0') { memcpy(name, th.prefix, sizeof(th.prefix)); name[sizeof(th.prefix)] = '\0'; len = strlen(name); name[len] = PATHSEPCHAR; len++; } /* Copy the name of the file in a safe way at the end of 'name' */ memcpy(&name[len], th.name, sizeof(th.name)); name[len + sizeof(th.name)] = '\0'; /* Calculate the size of the file.. for some strange reason this is stored as a string */ memcpy(buf, th.size, sizeof(th.size)); buf[sizeof(th.size)] = '\0'; int skip = strtol(buf, &end, 8); switch (th.typeflag) { case '\0': case '0': { // regular file /* Ignore empty files */ if (skip == 0) break; if (strlen(name) == 0) break; /* Store this entry in the list */ TarFileListEntry entry; entry.tar_filename = dupped_filename; entry.size = skip; entry.position = pos; /* Convert to lowercase and our PATHSEPCHAR */ SimplifyFileName(name); DEBUG(misc, 6, "Found file in tar: %s (%d bytes, %d offset)", name, skip, pos); if (_tar_filelist.insert(TarFileList::value_type(name, entry)).second) num++; break; } case '1': // hard links case '2': { // symbolic links /* Copy the destination of the link in a safe way at the end of 'linkname' */ memcpy(link, th.linkname, sizeof(th.linkname)); link[sizeof(th.linkname)] = '\0'; if (strlen(name) == 0 || strlen(link) == 0) break; /* Convert to lowercase and our PATHSEPCHAR */ SimplifyFileName(name); SimplifyFileName(link); /* Only allow relative links */ if (link[0] == PATHSEPCHAR) { DEBUG(misc, 1, "Ignoring absolute link in tar: %s -> %s", name, link); break; } /* Process relative path. * Note: The destination of links must not contain any directory-links. */ strcpy(dest, name); char *destpos = strrchr(dest, PATHSEPCHAR); if (destpos == NULL) destpos = dest; *destpos = '\0'; char *pos = link; while (*pos != '\0') { char *next = strchr(link, PATHSEPCHAR); if (next == NULL) next = pos + strlen(pos); /* Skip '.' (current dir) */ if (next != pos + 1 || pos[0] != '.') { if (next == pos + 2 && pos[0] == '.' && pos[1] == '.') { /* level up */ if (dest[0] == '\0') { DEBUG(misc, 1, "Ignoring link pointing outside of data directory: %s -> %s", name, link); break; } /* Truncate 'dest' after last PATHSEPCHAR. * This assumes, that the truncated part is a real directory and not a link */ destpos = strrchr(dest, PATHSEPCHAR); if (destpos == NULL) destpos = dest; } else { /* Append at end of 'dest' */ if (destpos != dest) *(destpos++) = PATHSEPCHAR; strncpy(destpos, pos, next - pos); // Safe as we do '\0'-termination ourselves destpos += next - pos; } *destpos = '\0'; } pos = next; } /* Store links in temporary list */ DEBUG(misc, 6, "Found link in tar: %s -> %s", name, dest); links.insert(TarLinkList::value_type(name, dest)); break; } case '5': // directory /* Convert to lowercase and our PATHSEPCHAR */ SimplifyFileName(name); /* Store the first directory name we detect */ DEBUG(misc, 6, "Found dir in tar: %s", name); if (_tar_list[filename].dirname == NULL) _tar_list[filename].dirname = strdup(name); break; default: /* Ignore other types */ break; } /* Skip to the next block.. */ skip = Align(skip, 512); fseek(f, skip, SEEK_CUR); pos += skip; } DEBUG(misc, 1, "Found tar '%s' with %d new files", filename, num); fclose(f); /* Resolve file links and store directory links. * We restrict usage of links to two cases: * 1) Links to directories: * Both the source path and the destination path must NOT contain any further links. * When resolving files at most one directory link is resolved. * 2) Links to files: * The destination path must NOT contain any links. * The source path may contain one directory link. */ for (TarLinkList::iterator link = links.begin(); link != links.end(); link++) { const std::string &src = link->first; const std::string &dest = link->second; TarAddLink(src, dest); } return true; } static int ScanPathForTarFiles(const char *path, size_t basepath_length) { extern bool FiosIsValidFile(const char *path, const struct dirent *ent, struct stat *sb); uint num = 0; struct stat sb; struct dirent *dirent; DIR *dir; if (path == NULL || (dir = ttd_opendir(path)) == NULL) return 0; while ((dirent = readdir(dir)) != NULL) { const char *d_name = FS2OTTD(dirent->d_name); char filename[MAX_PATH]; if (!FiosIsValidFile(path, dirent, &sb)) continue; snprintf(filename, lengthof(filename), "%s%s", path, d_name); if (S_ISDIR(sb.st_mode)) { /* Directory */ if (strcmp(d_name, ".") == 0 || strcmp(d_name, "..") == 0) continue; AppendPathSeparator(filename, lengthof(filename)); num += ScanPathForTarFiles(filename, basepath_length); } else if (S_ISREG(sb.st_mode)) { /* File */ char *ext = strrchr(filename, '.'); /* If no extension or extension isn't .tar, skip the file */ if (ext == NULL) continue; if (strcasecmp(ext, ".tar") != 0) continue; if (TarListAddFile(filename)) num++; } } closedir(dir); return num; } void ScanForTarFiles() { Searchpath sp; char path[MAX_PATH]; uint num = 0; DEBUG(misc, 1, "Scanning for tars"); FOR_ALL_SEARCHPATHS(sp) { FioAppendDirectory(path, MAX_PATH, sp, DATA_DIR); num += ScanPathForTarFiles(path, strlen(path)); FioAppendDirectory(path, MAX_PATH, sp, AI_DIR); num += ScanPathForTarFiles(path, strlen(path)); FioAppendDirectory(path, MAX_PATH, sp, AI_LIBRARY_DIR); num += ScanPathForTarFiles(path, strlen(path)); FioAppendDirectory(path, MAX_PATH, sp, SCENARIO_DIR); num += ScanPathForTarFiles(path, strlen(path)); } DEBUG(misc, 1, "Scan complete, found %d files", num); } #if defined(WIN32) || defined(WINCE) /** * Determine the base (personal dir and game data dir) paths * @param exe the path from the current path to the executable * @note defined in the OS related files (os2.cpp, win32.cpp, unix.cpp etc) */ extern void DetermineBasePaths(const char *exe); #else /* defined(WIN32) || defined(WINCE) */ /** * Changes the working directory to the path of the give executable. * For OSX application bundles '.app' is the required extension of the bundle, * so when we crop the path to there, when can remove the name of the bundle * in the same way we remove the name from the executable name. * @param exe the path to the executable */ void ChangeWorkingDirectory(const char *exe) { #ifdef WITH_COCOA char *app_bundle = strchr(exe, '.'); while (app_bundle != NULL && strncasecmp(app_bundle, ".app", 4) != 0) app_bundle = strchr(&app_bundle[1], '.'); if (app_bundle != NULL) app_bundle[0] = '\0'; #endif /* WITH_COCOA */ char *s = (char*)strrchr(exe, PATHSEPCHAR); if (s != NULL) { *s = '\0'; #if defined(__DJGPP__) /* If we want to go to the root, we can't use cd C:, but we must use '/' */ if (s[-1] == ':') chdir("/"); #endif if (chdir(exe) != 0) DEBUG(misc, 0, "Directory with the binary does not exist?"); *s = PATHSEPCHAR; } #ifdef WITH_COCOA if (app_bundle != NULL) app_bundle[0] = '.'; #endif /* WITH_COCOA */ } /** * Determine the base (personal dir and game data dir) paths * @param exe the path to the executable */ void DetermineBasePaths(const char *exe) { char tmp[MAX_PATH]; #if defined(__MORPHOS__) || defined(__AMIGA__) || defined(DOS) || !defined(WITH_PERSONAL_DIR) _searchpaths[SP_PERSONAL_DIR] = NULL; #else const char *homedir = getenv("HOME"); if (homedir == NULL) { const struct passwd *pw = getpwuid(getuid()); homedir = (pw == NULL) ? "" : pw->pw_dir; } snprintf(tmp, MAX_PATH, "%s" PATHSEP "%s", homedir, PERSONAL_DIR); AppendPathSeparator(tmp, MAX_PATH); _searchpaths[SP_PERSONAL_DIR] = strdup(tmp); #endif #if defined(WITH_SHARED_DIR) snprintf(tmp, MAX_PATH, "%s", SHARED_DIR); AppendPathSeparator(tmp, MAX_PATH); _searchpaths[SP_SHARED_DIR] = strdup(tmp); #else _searchpaths[SP_SHARED_DIR] = NULL; #endif #if defined(__MORPHOS__) || defined(__AMIGA__) _searchpaths[SP_WORKING_DIR] = NULL; #else if (getcwd(tmp, MAX_PATH) == NULL) *tmp = '\0'; AppendPathSeparator(tmp, MAX_PATH); _searchpaths[SP_WORKING_DIR] = strdup(tmp); #endif /* Change the working directory to that one of the executable */ ChangeWorkingDirectory((char*)exe); if (getcwd(tmp, MAX_PATH) == NULL) *tmp = '\0'; AppendPathSeparator(tmp, MAX_PATH); _searchpaths[SP_BINARY_DIR] = strdup(tmp); #if defined(__MORPHOS__) || defined(__AMIGA__) || defined(DOS) _searchpaths[SP_INSTALLATION_DIR] = NULL; #else snprintf(tmp, MAX_PATH, "%s", GLOBAL_DATA_DIR); AppendPathSeparator(tmp, MAX_PATH); _searchpaths[SP_INSTALLATION_DIR] = strdup(tmp); #endif #ifdef WITH_COCOA extern void cocoaSetApplicationBundleDir(); cocoaSetApplicationBundleDir(); #else _searchpaths[SP_APPLICATION_BUNDLE_DIR] = NULL; #endif } #endif /* defined(WIN32) || defined(WINCE) */ char *_personal_dir; /** * Acquire the base paths (personal dir and game data dir), * fill all other paths (save dir, autosave dir etc) and * make the save and scenario directories. * @param exe the path from the current path to the executable */ void DeterminePaths(const char *exe) { DetermineBasePaths(exe); Searchpath sp; FOR_ALL_SEARCHPATHS(sp) DEBUG(misc, 4, "%s added as search path", _searchpaths[sp]); if (_config_file != NULL) { _personal_dir = strdup(_config_file); char *end = strrchr(_personal_dir , PATHSEPCHAR); if (end == NULL) { _personal_dir[0] = '\0'; } else { end[1] = '\0'; } } else { char personal_dir[MAX_PATH]; FioFindFullPath(personal_dir, lengthof(personal_dir), BASE_DIR, "openttd.cfg"); if (FileExists(personal_dir)) { char *end = strrchr(personal_dir, PATHSEPCHAR); if (end != NULL) end[1] = '\0'; _personal_dir = strdup(personal_dir); _config_file = str_fmt("%sopenttd.cfg", _personal_dir); } else { static const Searchpath new_openttd_cfg_order[] = { SP_PERSONAL_DIR, SP_BINARY_DIR, SP_WORKING_DIR, SP_SHARED_DIR, SP_INSTALLATION_DIR }; for (uint i = 0; i < lengthof(new_openttd_cfg_order); i++) { if (IsValidSearchPath(new_openttd_cfg_order[i])) { _personal_dir = strdup(_searchpaths[new_openttd_cfg_order[i]]); _config_file = str_fmt("%sopenttd.cfg", _personal_dir); break; } } } } DEBUG(misc, 3, "%s found as personal directory", _personal_dir); _highscore_file = str_fmt("%shs.dat", _personal_dir); _log_file = str_fmt("%sopenttd.log", _personal_dir); /* Make the necessary folders */ #if !defined(__MORPHOS__) && !defined(__AMIGA__) && defined(WITH_PERSONAL_DIR) FioCreateDirectory(_personal_dir); #endif static const Subdirectory default_subdirs[] = { SAVE_DIR, AUTOSAVE_DIR, SCENARIO_DIR, HEIGHTMAP_DIR }; for (uint i = 0; i < lengthof(default_subdirs); i++) { char *dir = str_fmt("%s%s", _personal_dir, FioGetSubdirectory(default_subdirs[i])); FioCreateDirectory(dir); free(dir); } /* If we have network we make a directory for the autodownloading of content */ _searchpaths[SP_AUTODOWNLOAD_DIR] = str_fmt("%s%s", _personal_dir, "content_download" PATHSEP); #ifdef ENABLE_NETWORK FioCreateDirectory(_searchpaths[SP_AUTODOWNLOAD_DIR]); /* Create the directory for each of the types of content */ const Subdirectory dirs[] = { SCENARIO_DIR, HEIGHTMAP_DIR, DATA_DIR, AI_DIR, AI_LIBRARY_DIR }; for (uint i = 0; i < lengthof(dirs); i++) { char *tmp = str_fmt("%s%s", _searchpaths[SP_AUTODOWNLOAD_DIR], FioGetSubdirectory(dirs[i])); FioCreateDirectory(tmp); free(tmp); } #else /* ENABLE_NETWORK */ /* If we don't have networking, we don't need to make the directory. But * if it exists we keep it, otherwise remove it from the search paths. */ if (!FileExists(_searchpaths[SP_AUTODOWNLOAD_DIR])) { free((void*)_searchpaths[SP_AUTODOWNLOAD_DIR]); _searchpaths[SP_AUTODOWNLOAD_DIR] = NULL; } #endif /* ENABLE_NETWORK */ ScanForTarFiles(); } /** * Sanitizes a filename, i.e. removes all illegal characters from it. * @param filename the "\0" terminated filename */ void SanitizeFilename(char *filename) { for (; *filename != '\0'; filename++) { switch (*filename) { /* The following characters are not allowed in filenames * on at least one of the supported operating systems: */ case ':': case '\\': case '*': case '?': case '/': case '<': case '>': case '|': case '"': *filename = '_'; break; } } } void *ReadFileToMem(const char *filename, size_t *lenp, size_t maxsize) { FILE *in = fopen(filename, "rb"); if (in == NULL) return NULL; fseek(in, 0, SEEK_END); size_t len = ftell(in); fseek(in, 0, SEEK_SET); if (len > maxsize) { fclose(in); return NULL; } byte *mem = MallocT<byte>(len + 1); mem[len] = 0; if (fread(mem, len, 1, in) != 1) { fclose(in); free(mem); return NULL; } fclose(in); *lenp = len; return mem; } /** * Scan a single directory (and recursively it's children) and add * any graphics sets that are found. * @param extension the extension of files to search for. * @param path full path we're currently at * @param basepath_length from where in the path are we 'based' on the search path */ static uint ScanPath(FileScanner *fs, const char *extension, const char *path, size_t basepath_length, bool recursive) { extern bool FiosIsValidFile(const char *path, const struct dirent *ent, struct stat *sb); uint num = 0; struct stat sb; struct dirent *dirent; DIR *dir; if (path == NULL || (dir = ttd_opendir(path)) == NULL) return 0; while ((dirent = readdir(dir)) != NULL) { const char *d_name = FS2OTTD(dirent->d_name); char filename[MAX_PATH]; if (!FiosIsValidFile(path, dirent, &sb)) continue; snprintf(filename, lengthof(filename), "%s%s", path, d_name); if (S_ISDIR(sb.st_mode)) { /* Directory */ if (!recursive) continue; if (strcmp(d_name, ".") == 0 || strcmp(d_name, "..") == 0) continue; AppendPathSeparator(filename, lengthof(filename)); num += ScanPath(fs, extension, filename, basepath_length, recursive); } else if (S_ISREG(sb.st_mode)) { /* File */ if (extension != NULL) { char *ext = strrchr(filename, '.'); /* If no extension or extension isn't .grf, skip the file */ if (ext == NULL) continue; if (strcasecmp(ext, extension) != 0) continue; } if (fs->AddFile(filename, basepath_length)) num++; } } closedir(dir); return num; } /** * Scan the given tar and add graphics sets when it finds one. * @param extension the extension of files to search for. * @param tar the tar to search in. */ static uint ScanTar(FileScanner *fs, const char *extension, TarFileList::iterator tar) { uint num = 0; const char *filename = (*tar).first.c_str(); if (extension != NULL) { const char *ext = strrchr(filename, '.'); /* If no extension or extension isn't .grf, skip the file */ if (ext == NULL) return false; if (strcasecmp(ext, extension) != 0) return false; } if (fs->AddFile(filename, 0)) num++; return num; } /** * Scan for files with the given extention in the given search path. * @param extension the extension of files to search for. * @param sd the sub directory to search in. * @param tars whether to search in the tars too. * @return the number of found files, i.e. the number of times that * AddFile returned true. */ uint FileScanner::Scan(const char *extension, Subdirectory sd, bool tars, bool recursive) { Searchpath sp; char path[MAX_PATH]; TarFileList::iterator tar; uint num = 0; FOR_ALL_SEARCHPATHS(sp) { FioAppendDirectory(path, MAX_PATH, sp, sd); num += ScanPath(this, extension, path, strlen(path), recursive); } if (tars) { FOR_ALL_TARS(tar) { num += ScanTar(this, extension, tar); } } return num; } /** * Scan for files with the given extention in the given search path. * @param extension the extension of files to search for. * @param directory the sub directory to search in. * @return the number of found files, i.e. the number of times that * AddFile returned true. */ uint FileScanner::Scan(const char *extension, const char *directory, bool recursive) { char path[MAX_PATH]; strecpy(path, directory, lastof(path)); AppendPathSeparator(path, lengthof(path)); return ScanPath(this, extension, path, strlen(path), recursive); }