/*************************************************************************/ /* file_access_unix.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #include "file_access_unix.h" #if defined(UNIX_ENABLED) || defined(LIBC_FILEIO_ENABLED) #include "core/os/os.h" #include "core/print_string.h" #include <sys/stat.h> #include <sys/types.h> #if defined(UNIX_ENABLED) #include <unistd.h> #endif #ifndef ANDROID_ENABLED #include <sys/statvfs.h> #endif #ifdef MSVC #define S_ISREG(m) ((m)&_S_IFREG) #include <io.h> #endif #ifndef S_ISREG #define S_ISREG(m) ((m)&S_IFREG) #endif void FileAccessUnix::check_errors() const { ERR_FAIL_COND(!f); if (feof(f)) { last_error = ERR_FILE_EOF; } } Error FileAccessUnix::_open(const String &p_path, int p_mode_flags) { if (f) fclose(f); f = NULL; path_src = p_path; path = fix_path(p_path); //printf("opening %ls, %i\n", path.c_str(), Memory::get_static_mem_usage()); ERR_FAIL_COND_V(f, ERR_ALREADY_IN_USE); const char *mode_string; if (p_mode_flags == READ) mode_string = "rb"; else if (p_mode_flags == WRITE) mode_string = "wb"; else if (p_mode_flags == READ_WRITE) mode_string = "rb+"; else if (p_mode_flags == WRITE_READ) mode_string = "wb+"; else return ERR_INVALID_PARAMETER; /* pretty much every implementation that uses fopen as primary backend (unix-compatible mostly) supports utf8 encoding */ //printf("opening %s as %s\n", p_path.utf8().get_data(), path.utf8().get_data()); struct stat st; int err = stat(path.utf8().get_data(), &st); if (!err) { switch (st.st_mode & S_IFMT) { case S_IFLNK: case S_IFREG: break; default: return ERR_FILE_CANT_OPEN; } } if (is_backup_save_enabled() && (p_mode_flags & WRITE) && !(p_mode_flags & READ)) { save_path = path; path = path + ".tmp"; } f = fopen(path.utf8().get_data(), mode_string); if (f == NULL) { last_error = ERR_FILE_CANT_OPEN; return ERR_FILE_CANT_OPEN; } else { last_error = OK; flags = p_mode_flags; return OK; } } void FileAccessUnix::close() { if (!f) return; fclose(f); f = NULL; if (close_notification_func) { close_notification_func(path, flags); } if (save_path != "") { int rename_error = rename((save_path + ".tmp").utf8().get_data(), save_path.utf8().get_data()); if (rename_error && close_fail_notify) { close_fail_notify(save_path); } save_path = ""; ERR_FAIL_COND(rename_error != 0); } } bool FileAccessUnix::is_open() const { return (f != NULL); } String FileAccessUnix::get_path() const { return path_src; } String FileAccessUnix::get_path_absolute() const { return path; } void FileAccessUnix::seek(size_t p_position) { ERR_FAIL_COND(!f); last_error = OK; if (fseek(f, p_position, SEEK_SET)) check_errors(); } void FileAccessUnix::seek_end(int64_t p_position) { ERR_FAIL_COND(!f); if (fseek(f, p_position, SEEK_END)) check_errors(); } size_t FileAccessUnix::get_position() const { ERR_FAIL_COND_V(!f, 0); long pos = ftell(f); if (pos < 0) { check_errors(); ERR_FAIL_V(0); } return pos; } size_t FileAccessUnix::get_len() const { ERR_FAIL_COND_V(!f, 0); long pos = ftell(f); ERR_FAIL_COND_V(pos < 0, 0); ERR_FAIL_COND_V(fseek(f, 0, SEEK_END), 0); long size = ftell(f); ERR_FAIL_COND_V(size < 0, 0); ERR_FAIL_COND_V(fseek(f, pos, SEEK_SET), 0); return size; } bool FileAccessUnix::eof_reached() const { return last_error == ERR_FILE_EOF; } uint8_t FileAccessUnix::get_8() const { ERR_FAIL_COND_V(!f, 0); uint8_t b; if (fread(&b, 1, 1, f) == 0) { check_errors(); b = '\0'; } return b; } int FileAccessUnix::get_buffer(uint8_t *p_dst, int p_length) const { ERR_FAIL_COND_V(!f, -1); int read = fread(p_dst, 1, p_length, f); check_errors(); return read; }; Error FileAccessUnix::get_error() const { return last_error; } void FileAccessUnix::flush() { ERR_FAIL_COND(!f); fflush(f); } void FileAccessUnix::store_8(uint8_t p_dest) { ERR_FAIL_COND(!f); ERR_FAIL_COND(fwrite(&p_dest, 1, 1, f) != 1); } void FileAccessUnix::store_buffer(const uint8_t *p_src, int p_length) { ERR_FAIL_COND(!f); ERR_FAIL_COND((int)fwrite(p_src, 1, p_length, f) != p_length); } bool FileAccessUnix::file_exists(const String &p_path) { int err; struct stat st; String filename = fix_path(p_path); // Does the name exist at all? err = stat(filename.utf8().get_data(), &st); if (err) return false; #ifdef UNIX_ENABLED // See if we have access to the file if (access(filename.utf8().get_data(), F_OK)) return false; #else if (_access(filename.utf8().get_data(), 4) == -1) return false; #endif // See if this is a regular file switch (st.st_mode & S_IFMT) { case S_IFLNK: case S_IFREG: return true; default: return false; } } uint64_t FileAccessUnix::_get_modified_time(const String &p_file) { String file = fix_path(p_file); struct stat flags; int err = stat(file.utf8().get_data(), &flags); if (!err) { return flags.st_mtime; } else { ERR_EXPLAIN("Failed to get modified time for: " + p_file); ERR_FAIL_V(0); }; } Error FileAccessUnix::_chmod(const String &p_path, int p_mod) { int err = chmod(p_path.utf8().get_data(), p_mod); if (!err) { return OK; } return FAILED; } FileAccess *FileAccessUnix::create_libc() { return memnew(FileAccessUnix); } CloseNotificationFunc FileAccessUnix::close_notification_func = NULL; FileAccessUnix::FileAccessUnix() : f(NULL), flags(0), last_error(OK) { } FileAccessUnix::~FileAccessUnix() { close(); } #endif