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Diffstat (limited to 'dom/system/OSFileConstants.cpp')
| -rw-r--r-- | dom/system/OSFileConstants.cpp | 898 |
1 files changed, 898 insertions, 0 deletions
diff --git a/dom/system/OSFileConstants.cpp b/dom/system/OSFileConstants.cpp new file mode 100644 index 0000000000..5abc19dd99 --- /dev/null +++ b/dom/system/OSFileConstants.cpp @@ -0,0 +1,898 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/DebugOnly.h" + +#include "fcntl.h" +#include "errno.h" + +#include "prsystem.h" + +// Short macro to get the size of a member of a +// given struct at compile time. +// t is the type of struct, m the name of the +// member: +// DOM_SIZEOF_MEMBER(struct mystruct, myint) +// will give you the size of the type of myint. +#define DOM_SIZEOF_MEMBER(t, m) sizeof(((t*)0)->m) + +#if defined(XP_UNIX) +# include "unistd.h" +# include "dirent.h" +# include "poll.h" +# include "sys/stat.h" +# if defined(XP_LINUX) +# include <sys/prctl.h> +# include <sys/vfs.h> +# define statvfs statfs +# define f_frsize f_bsize +# else +# include "sys/statvfs.h" +# endif // defined(XP_LINUX) +# if !defined(ANDROID) +# include "sys/wait.h" +# include <spawn.h> +# endif // !defined(ANDROID) +#endif // defined(XP_UNIX) + +#if defined(XP_LINUX) +# include <linux/fadvise.h> +#endif // defined(XP_LINUX) + +#if defined(XP_MACOSX) +# include "copyfile.h" +#endif // defined(XP_MACOSX) + +#if defined(XP_WIN) +# include <windows.h> +# include <accctrl.h> + +# ifndef PATH_MAX +# define PATH_MAX MAX_PATH +# endif + +#endif // defined(XP_WIN) + +#include "jsapi.h" +#include "jsfriendapi.h" +#include "js/friend/ErrorMessages.h" // js::GetErrorMessage, JSMSG_* +#include "js/PropertyAndElement.h" // JS_DefineObject, JS_DefineProperty, JS_GetProperty, JS_SetProperty +#include "BindingUtils.h" + +// Used to provide information on the OS + +#include "nsThreadUtils.h" +#include "nsIObserverService.h" +#include "nsIObserver.h" +#include "nsDirectoryServiceUtils.h" +#include "nsIXULRuntime.h" +#include "nsXPCOMCIDInternal.h" +#include "nsServiceManagerUtils.h" +#include "nsString.h" +#include "nsSystemInfo.h" +#include "nsDirectoryServiceDefs.h" +#include "nsXULAppAPI.h" +#include "nsAppDirectoryServiceDefs.h" +#include "mozJSModuleLoader.h" + +#include "mozilla/ClearOnShutdown.h" +#include "mozilla/StaticPtr.h" +#include "mozilla/UniquePtr.h" + +#include "OSFileConstants.h" +#include "nsZipArchive.h" + +#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || \ + defined(__OpenBSD__) +# define __dd_fd dd_fd +#endif + +/** + * This module defines the basic libc constants (error numbers, open modes, + * etc.) used by OS.File and possibly other OS-bound JavaScript libraries. + */ + +namespace mozilla { + +namespace { + +StaticRefPtr<OSFileConstantsService> gInstance; + +} // anonymous namespace + +struct OSFileConstantsService::Paths { + /** + * The name of the directory holding all the libraries (libxpcom, libnss, + * etc.) + */ + nsString libDir; + nsString tmpDir; + nsString profileDir; + nsString localProfileDir; + + Paths() { + libDir.SetIsVoid(true); + tmpDir.SetIsVoid(true); + profileDir.SetIsVoid(true); + localProfileDir.SetIsVoid(true); + } +}; + +/** + * Return the path to one of the special directories. + * + * @param aKey The key to the special directory (e.g. "TmpD", "ProfD", ...) + * @param aOutPath The path to the special directory. In case of error, + * the string is set to void. + */ +nsresult GetPathToSpecialDir(const char* aKey, nsString& aOutPath) { + nsCOMPtr<nsIFile> file; + nsresult rv = NS_GetSpecialDirectory(aKey, getter_AddRefs(file)); + if (NS_FAILED(rv) || !file) { + return rv; + } + + return file->GetPath(aOutPath); +} + +/** + * In some cases, OSFileConstants may be instantiated before the + * profile is setup. In such cases, |OS.Constants.Path.profileDir| and + * |OS.Constants.Path.localProfileDir| are undefined. However, we want + * to ensure that this does not break existing code, so that future + * workers spawned after the profile is setup have these constants. + * + * For this purpose, we register an observer to set |mPaths->profileDir| + * and |mPaths->localProfileDir| once the profile is setup. + */ +NS_IMETHODIMP +OSFileConstantsService::Observe(nsISupports*, const char* aTopic, + const char16_t*) { + if (!mInitialized) { + // Initialization has not taken place, something is wrong, + // don't make things worse. + return NS_OK; + } + + nsresult rv = + GetPathToSpecialDir(NS_APP_USER_PROFILE_50_DIR, mPaths->profileDir); + if (NS_FAILED(rv)) { + return rv; + } + rv = GetPathToSpecialDir(NS_APP_USER_PROFILE_LOCAL_50_DIR, + mPaths->localProfileDir); + if (NS_FAILED(rv)) { + return rv; + } + + return NS_OK; +} + +/** + * Perform the part of initialization that can only be + * executed on the main thread. + */ +nsresult OSFileConstantsService::InitOSFileConstants() { + MOZ_ASSERT(NS_IsMainThread()); + if (mInitialized) { + return NS_OK; + } + + UniquePtr<Paths> paths(new Paths); + + // Initialize paths->libDir + nsCOMPtr<nsIFile> file; + nsresult rv = + NS_GetSpecialDirectory(NS_XPCOM_LIBRARY_FILE, getter_AddRefs(file)); + if (NS_FAILED(rv)) { + return rv; + } + + nsCOMPtr<nsIFile> libDir; + rv = file->GetParent(getter_AddRefs(libDir)); + if (NS_FAILED(rv)) { + return rv; + } + + rv = libDir->GetPath(paths->libDir); + if (NS_FAILED(rv)) { + return rv; + } + + // Setup profileDir and localProfileDir immediately if possible (we + // assume that NS_APP_USER_PROFILE_50_DIR and + // NS_APP_USER_PROFILE_LOCAL_50_DIR are set simultaneously) + rv = GetPathToSpecialDir(NS_APP_USER_PROFILE_50_DIR, paths->profileDir); + if (NS_SUCCEEDED(rv)) { + rv = GetPathToSpecialDir(NS_APP_USER_PROFILE_LOCAL_50_DIR, + paths->localProfileDir); + } + + // Otherwise, delay setup of profileDir/localProfileDir until they + // become available. + if (NS_FAILED(rv)) { + nsCOMPtr<nsIObserverService> obsService = + do_GetService(NS_OBSERVERSERVICE_CONTRACTID, &rv); + if (NS_FAILED(rv)) { + return rv; + } + rv = obsService->AddObserver(this, "profile-do-change", false); + if (NS_FAILED(rv)) { + return rv; + } + } + + GetPathToSpecialDir(NS_OS_TEMP_DIR, paths->tmpDir); + + mPaths = std::move(paths); + + // Get the umask from the system-info service. + // The property will always be present, but it will be zero on + // non-Unix systems. + // nsSystemInfo::gUserUmask is initialized by NS_InitXPCOM so we don't need + // to initialize the service. + mUserUmask = nsSystemInfo::gUserUmask; + + mInitialized = true; + return NS_OK; +} + +/** + * Define a simple read-only property holding an integer. + * + * @param name The name of the constant. Used both as the JS name for the + * constant and to access its value. Must be defined. + * + * Produces a |ConstantSpec|. + */ +#define INT_CONSTANT(name) \ + { #name, JS::Int32Value(name) } + +/** + * Define a simple read-only property holding an unsigned integer. + * + * @param name The name of the constant. Used both as the JS name for the + * constant and to access its value. Must be defined. + * + * Produces a |ConstantSpec|. + */ +#define UINT_CONSTANT(name) \ + { #name, JS::NumberValue(name) } + +/** + * End marker for ConstantSpec + */ +#define PROP_END \ + { nullptr, JS::UndefinedValue() } + +// Define missing constants for Android +#if !defined(S_IRGRP) +# define S_IXOTH 0001 +# define S_IWOTH 0002 +# define S_IROTH 0004 +# define S_IRWXO 0007 +# define S_IXGRP 0010 +# define S_IWGRP 0020 +# define S_IRGRP 0040 +# define S_IRWXG 0070 +# define S_IXUSR 0100 +# define S_IWUSR 0200 +# define S_IRUSR 0400 +# define S_IRWXU 0700 +#endif // !defined(S_IRGRP) + +/** + * The properties defined in libc. + * + * If you extend this list of properties, please + * separate categories ("errors", "open", etc.), + * keep properties organized by alphabetical order + * and #ifdef-away properties that are not portable. + */ +static const dom::ConstantSpec gLibcProperties[] = { + // Arguments for open + INT_CONSTANT(O_APPEND), +#if defined(O_CLOEXEC) + INT_CONSTANT(O_CLOEXEC), +#endif // defined(O_CLOEXEC) + INT_CONSTANT(O_CREAT), +#if defined(O_DIRECTORY) + INT_CONSTANT(O_DIRECTORY), +#endif // defined(O_DIRECTORY) +#if defined(O_EVTONLY) + INT_CONSTANT(O_EVTONLY), +#endif // defined(O_EVTONLY) + INT_CONSTANT(O_EXCL), +#if defined(O_EXLOCK) + INT_CONSTANT(O_EXLOCK), +#endif // defined(O_EXLOCK) +#if defined(O_LARGEFILE) + INT_CONSTANT(O_LARGEFILE), +#endif // defined(O_LARGEFILE) +#if defined(O_NOFOLLOW) + INT_CONSTANT(O_NOFOLLOW), +#endif // defined(O_NOFOLLOW) +#if defined(O_NONBLOCK) + INT_CONSTANT(O_NONBLOCK), +#endif // defined(O_NONBLOCK) + INT_CONSTANT(O_RDONLY), + INT_CONSTANT(O_RDWR), +#if defined(O_RSYNC) + INT_CONSTANT(O_RSYNC), +#endif // defined(O_RSYNC) +#if defined(O_SHLOCK) + INT_CONSTANT(O_SHLOCK), +#endif // defined(O_SHLOCK) +#if defined(O_SYMLINK) + INT_CONSTANT(O_SYMLINK), +#endif // defined(O_SYMLINK) +#if defined(O_SYNC) + INT_CONSTANT(O_SYNC), +#endif // defined(O_SYNC) + INT_CONSTANT(O_TRUNC), + INT_CONSTANT(O_WRONLY), + +#if defined(FD_CLOEXEC) + INT_CONSTANT(FD_CLOEXEC), +#endif // defined(FD_CLOEXEC) + +#if defined(AT_EACCESS) + INT_CONSTANT(AT_EACCESS), +#endif // defined(AT_EACCESS) +#if defined(AT_FDCWD) + INT_CONSTANT(AT_FDCWD), +#endif // defined(AT_FDCWD) +#if defined(AT_SYMLINK_NOFOLLOW) + INT_CONSTANT(AT_SYMLINK_NOFOLLOW), +#endif // defined(AT_SYMLINK_NOFOLLOW) + +#if defined(POSIX_FADV_SEQUENTIAL) + INT_CONSTANT(POSIX_FADV_SEQUENTIAL), +#endif // defined(POSIX_FADV_SEQUENTIAL) + +// access +#if defined(F_OK) + INT_CONSTANT(F_OK), + INT_CONSTANT(R_OK), + INT_CONSTANT(W_OK), + INT_CONSTANT(X_OK), +#endif // defined(F_OK) + + // modes + INT_CONSTANT(S_IRGRP), + INT_CONSTANT(S_IROTH), + INT_CONSTANT(S_IRUSR), + INT_CONSTANT(S_IRWXG), + INT_CONSTANT(S_IRWXO), + INT_CONSTANT(S_IRWXU), + INT_CONSTANT(S_IWGRP), + INT_CONSTANT(S_IWOTH), + INT_CONSTANT(S_IWUSR), + INT_CONSTANT(S_IXOTH), + INT_CONSTANT(S_IXGRP), + INT_CONSTANT(S_IXUSR), + + // seek + INT_CONSTANT(SEEK_CUR), + INT_CONSTANT(SEEK_END), + INT_CONSTANT(SEEK_SET), + +#if defined(XP_UNIX) + // poll + INT_CONSTANT(POLLERR), + INT_CONSTANT(POLLHUP), + INT_CONSTANT(POLLIN), + INT_CONSTANT(POLLNVAL), + INT_CONSTANT(POLLOUT), + +// wait +# if defined(WNOHANG) + INT_CONSTANT(WNOHANG), +# endif // defined(WNOHANG) + + // fcntl command values + INT_CONSTANT(F_GETLK), + INT_CONSTANT(F_SETFD), + INT_CONSTANT(F_SETFL), + INT_CONSTANT(F_SETLK), + INT_CONSTANT(F_SETLKW), + + // flock type values + INT_CONSTANT(F_RDLCK), + INT_CONSTANT(F_WRLCK), + INT_CONSTANT(F_UNLCK), + +// splice +# if defined(SPLICE_F_MOVE) + INT_CONSTANT(SPLICE_F_MOVE), +# endif // defined(SPLICE_F_MOVE) +# if defined(SPLICE_F_NONBLOCK) + INT_CONSTANT(SPLICE_F_NONBLOCK), +# endif // defined(SPLICE_F_NONBLOCK) +# if defined(SPLICE_F_MORE) + INT_CONSTANT(SPLICE_F_MORE), +# endif // defined(SPLICE_F_MORE) +# if defined(SPLICE_F_GIFT) + INT_CONSTANT(SPLICE_F_GIFT), +# endif // defined(SPLICE_F_GIFT) +#endif // defined(XP_UNIX) +// copyfile +#if defined(COPYFILE_DATA) + INT_CONSTANT(COPYFILE_DATA), + INT_CONSTANT(COPYFILE_EXCL), + INT_CONSTANT(COPYFILE_XATTR), + INT_CONSTANT(COPYFILE_STAT), + INT_CONSTANT(COPYFILE_ACL), + INT_CONSTANT(COPYFILE_MOVE), +#endif // defined(COPYFILE_DATA) + + // error values + INT_CONSTANT(EACCES), + INT_CONSTANT(EAGAIN), + INT_CONSTANT(EBADF), + INT_CONSTANT(EEXIST), + INT_CONSTANT(EFAULT), + INT_CONSTANT(EFBIG), + INT_CONSTANT(EINVAL), + INT_CONSTANT(EINTR), + INT_CONSTANT(EIO), + INT_CONSTANT(EISDIR), +#if defined(ELOOP) // not defined with VC9 + INT_CONSTANT(ELOOP), +#endif // defined(ELOOP) + INT_CONSTANT(EMFILE), + INT_CONSTANT(ENAMETOOLONG), + INT_CONSTANT(ENFILE), + INT_CONSTANT(ENOENT), + INT_CONSTANT(ENOMEM), + INT_CONSTANT(ENOSPC), + INT_CONSTANT(ENOTDIR), + INT_CONSTANT(ENXIO), +#if defined(EOPNOTSUPP) // not defined with VC 9 + INT_CONSTANT(EOPNOTSUPP), +#endif // defined(EOPNOTSUPP) +#if defined(EOVERFLOW) // not defined with VC 9 + INT_CONSTANT(EOVERFLOW), +#endif // defined(EOVERFLOW) + INT_CONSTANT(EPERM), + INT_CONSTANT(ERANGE), + INT_CONSTANT(ENOSYS), +#if defined(ETIMEDOUT) // not defined with VC 9 + INT_CONSTANT(ETIMEDOUT), +#endif // defined(ETIMEDOUT) +#if defined(EWOULDBLOCK) // not defined with VC 9 + INT_CONSTANT(EWOULDBLOCK), +#endif // defined(EWOULDBLOCK) + INT_CONSTANT(EXDEV), + +#if defined(DT_UNKNOWN) + // Constants for |readdir| + INT_CONSTANT(DT_UNKNOWN), + INT_CONSTANT(DT_FIFO), + INT_CONSTANT(DT_CHR), + INT_CONSTANT(DT_DIR), + INT_CONSTANT(DT_BLK), + INT_CONSTANT(DT_REG), + INT_CONSTANT(DT_LNK), + INT_CONSTANT(DT_SOCK), +#endif // defined(DT_UNKNOWN) + +#if defined(XP_UNIX) + // Constants for |stat| + INT_CONSTANT(S_IFMT), + INT_CONSTANT(S_IFIFO), + INT_CONSTANT(S_IFCHR), + INT_CONSTANT(S_IFDIR), + INT_CONSTANT(S_IFBLK), + INT_CONSTANT(S_IFREG), + INT_CONSTANT(S_IFLNK), // not defined on minGW + INT_CONSTANT(S_IFSOCK), // not defined on minGW +#endif // defined(XP_UNIX) + + INT_CONSTANT(PATH_MAX), + +#if defined(XP_LINUX) + // prctl options + INT_CONSTANT(PR_CAPBSET_READ), +#endif + +// Constants used to define data structures +// +// Many data structures have different fields/sizes/etc. on +// various OSes / versions of the same OS / platforms. For these +// data structures, we need to compute and export from C the size +// and, if necessary, the offset of fields, so as to be able to +// define the structure in JS. + +#if defined(XP_UNIX) + // The size of |mode_t|. + {"OSFILE_SIZEOF_MODE_T", JS::Int32Value(sizeof(mode_t))}, + + // The size of |gid_t|. + {"OSFILE_SIZEOF_GID_T", JS::Int32Value(sizeof(gid_t))}, + + // The size of |uid_t|. + {"OSFILE_SIZEOF_UID_T", JS::Int32Value(sizeof(uid_t))}, + + // The size of |time_t|. + {"OSFILE_SIZEOF_TIME_T", JS::Int32Value(sizeof(time_t))}, + + // The size of |fsblkcnt_t|. + {"OSFILE_SIZEOF_FSBLKCNT_T", JS::Int32Value(sizeof(fsblkcnt_t))}, + +# if !defined(ANDROID) + // The size of |posix_spawn_file_actions_t|. + {"OSFILE_SIZEOF_POSIX_SPAWN_FILE_ACTIONS_T", + JS::Int32Value(sizeof(posix_spawn_file_actions_t))}, + + // The size of |posix_spawnattr_t|. + {"OSFILE_SIZEOF_POSIX_SPAWNATTR_T", + JS::Int32Value(sizeof(posix_spawnattr_t))}, +# endif // !defined(ANDROID) + + // Defining |dirent|. + // Size + {"OSFILE_SIZEOF_DIRENT", JS::Int32Value(sizeof(dirent))}, + + // Defining |flock|. + {"OSFILE_SIZEOF_FLOCK", JS::Int32Value(sizeof(struct flock))}, + {"OSFILE_OFFSETOF_FLOCK_L_START", + JS::Int32Value(offsetof(struct flock, l_start))}, + {"OSFILE_OFFSETOF_FLOCK_L_LEN", + JS::Int32Value(offsetof(struct flock, l_len))}, + {"OSFILE_OFFSETOF_FLOCK_L_PID", + JS::Int32Value(offsetof(struct flock, l_pid))}, + {"OSFILE_OFFSETOF_FLOCK_L_TYPE", + JS::Int32Value(offsetof(struct flock, l_type))}, + {"OSFILE_OFFSETOF_FLOCK_L_WHENCE", + JS::Int32Value(offsetof(struct flock, l_whence))}, + + // Offset of field |d_name|. + {"OSFILE_OFFSETOF_DIRENT_D_NAME", + JS::Int32Value(offsetof(struct dirent, d_name))}, + // An upper bound to the length of field |d_name| of struct |dirent|. + // (may not be exact, depending on padding). + {"OSFILE_SIZEOF_DIRENT_D_NAME", + JS::Int32Value(sizeof(struct dirent) - offsetof(struct dirent, d_name))}, + + // Defining |timeval|. + {"OSFILE_SIZEOF_TIMEVAL", JS::Int32Value(sizeof(struct timeval))}, + {"OSFILE_OFFSETOF_TIMEVAL_TV_SEC", + JS::Int32Value(offsetof(struct timeval, tv_sec))}, + {"OSFILE_OFFSETOF_TIMEVAL_TV_USEC", + JS::Int32Value(offsetof(struct timeval, tv_usec))}, + +# if defined(DT_UNKNOWN) + // Position of field |d_type| in |dirent| + // Not strictly posix, but seems defined on all platforms + // except mingw32. + {"OSFILE_OFFSETOF_DIRENT_D_TYPE", + JS::Int32Value(offsetof(struct dirent, d_type))}, +# endif // defined(DT_UNKNOWN) + +// Under MacOS X and BSDs, |dirfd| is a macro rather than a +// function, so we need a little help to get it to work +# if defined(dirfd) + {"OSFILE_SIZEOF_DIR", JS::Int32Value(sizeof(DIR))}, + + {"OSFILE_OFFSETOF_DIR_DD_FD", JS::Int32Value(offsetof(DIR, __dd_fd))}, +# endif + + // Defining |stat| + + {"OSFILE_SIZEOF_STAT", JS::Int32Value(sizeof(struct stat))}, + + {"OSFILE_OFFSETOF_STAT_ST_MODE", + JS::Int32Value(offsetof(struct stat, st_mode))}, + {"OSFILE_OFFSETOF_STAT_ST_UID", + JS::Int32Value(offsetof(struct stat, st_uid))}, + {"OSFILE_OFFSETOF_STAT_ST_GID", + JS::Int32Value(offsetof(struct stat, st_gid))}, + {"OSFILE_OFFSETOF_STAT_ST_SIZE", + JS::Int32Value(offsetof(struct stat, st_size))}, + +# if defined(HAVE_ST_ATIMESPEC) + {"OSFILE_OFFSETOF_STAT_ST_ATIME", + JS::Int32Value(offsetof(struct stat, st_atimespec))}, + {"OSFILE_OFFSETOF_STAT_ST_MTIME", + JS::Int32Value(offsetof(struct stat, st_mtimespec))}, + {"OSFILE_OFFSETOF_STAT_ST_CTIME", + JS::Int32Value(offsetof(struct stat, st_ctimespec))}, +# else + {"OSFILE_OFFSETOF_STAT_ST_ATIME", + JS::Int32Value(offsetof(struct stat, st_atime))}, + {"OSFILE_OFFSETOF_STAT_ST_MTIME", + JS::Int32Value(offsetof(struct stat, st_mtime))}, + {"OSFILE_OFFSETOF_STAT_ST_CTIME", + JS::Int32Value(offsetof(struct stat, st_ctime))}, +# endif // defined(HAVE_ST_ATIME) + +// Several OSes have a birthtime field. For the moment, supporting only Darwin. +# if defined(_DARWIN_FEATURE_64_BIT_INODE) + {"OSFILE_OFFSETOF_STAT_ST_BIRTHTIME", + JS::Int32Value(offsetof(struct stat, st_birthtime))}, +# endif // defined(_DARWIN_FEATURE_64_BIT_INODE) + + // Defining |statvfs| + + {"OSFILE_SIZEOF_STATVFS", JS::Int32Value(sizeof(struct statvfs))}, + + // We have no guarantee how big "f_frsize" is, so we have to calculate that. + {"OSFILE_SIZEOF_STATVFS_F_FRSIZE", + JS::Int32Value(DOM_SIZEOF_MEMBER(struct statvfs, f_frsize))}, + {"OSFILE_OFFSETOF_STATVFS_F_FRSIZE", + JS::Int32Value(offsetof(struct statvfs, f_frsize))}, + {"OSFILE_OFFSETOF_STATVFS_F_BAVAIL", + JS::Int32Value(offsetof(struct statvfs, f_bavail))}, + +#endif // defined(XP_UNIX) + +// System configuration + +// Under MacOSX, to avoid using deprecated functions that do not +// match the constants we define in this object (including +// |sizeof|/|offsetof| stuff, but not only), for a number of +// functions, we need to use functions with a $INODE64 suffix. +// That is true on Intel-based mac when the _DARWIN_FEATURE_64_BIT_INODE +// macro is set. But not on Apple Silicon. +#if defined(_DARWIN_FEATURE_64_BIT_INODE) && !defined(__aarch64__) + {"_DARWIN_INODE64_SYMBOLS", JS::Int32Value(1)}, +#endif // defined(_DARWIN_FEATURE_64_BIT_INODE) + +// Similar feature for Linux +#if defined(_STAT_VER) + INT_CONSTANT(_STAT_VER), +#endif // defined(_STAT_VER) + + PROP_END}; + +#if defined(XP_WIN) +/** + * The properties defined in windows.h. + * + * If you extend this list of properties, please + * separate categories ("errors", "open", etc.), + * keep properties organized by alphabetical order + * and #ifdef-away properties that are not portable. + */ +static const dom::ConstantSpec gWinProperties[] = { + // FormatMessage flags + INT_CONSTANT(FORMAT_MESSAGE_FROM_SYSTEM), + INT_CONSTANT(FORMAT_MESSAGE_IGNORE_INSERTS), + + // The max length of paths + INT_CONSTANT(MAX_PATH), + + // CreateFile desired access + INT_CONSTANT(GENERIC_ALL), + INT_CONSTANT(GENERIC_EXECUTE), + INT_CONSTANT(GENERIC_READ), + INT_CONSTANT(GENERIC_WRITE), + + // CreateFile share mode + INT_CONSTANT(FILE_SHARE_DELETE), + INT_CONSTANT(FILE_SHARE_READ), + INT_CONSTANT(FILE_SHARE_WRITE), + + // CreateFile creation disposition + INT_CONSTANT(CREATE_ALWAYS), + INT_CONSTANT(CREATE_NEW), + INT_CONSTANT(OPEN_ALWAYS), + INT_CONSTANT(OPEN_EXISTING), + INT_CONSTANT(TRUNCATE_EXISTING), + + // CreateFile attributes + INT_CONSTANT(FILE_ATTRIBUTE_ARCHIVE), + INT_CONSTANT(FILE_ATTRIBUTE_DIRECTORY), + INT_CONSTANT(FILE_ATTRIBUTE_HIDDEN), + INT_CONSTANT(FILE_ATTRIBUTE_NORMAL), + INT_CONSTANT(FILE_ATTRIBUTE_READONLY), + INT_CONSTANT(FILE_ATTRIBUTE_REPARSE_POINT), + INT_CONSTANT(FILE_ATTRIBUTE_SYSTEM), + INT_CONSTANT(FILE_ATTRIBUTE_TEMPORARY), + INT_CONSTANT(FILE_FLAG_BACKUP_SEMANTICS), + + // CreateFile error constant + {"INVALID_HANDLE_VALUE", JS::Int32Value(INT_PTR(INVALID_HANDLE_VALUE))}, + + // CreateFile flags + INT_CONSTANT(FILE_FLAG_DELETE_ON_CLOSE), + + // SetFilePointer methods + INT_CONSTANT(FILE_BEGIN), + INT_CONSTANT(FILE_CURRENT), + INT_CONSTANT(FILE_END), + + // SetFilePointer error constant + UINT_CONSTANT(INVALID_SET_FILE_POINTER), + + // File attributes + INT_CONSTANT(FILE_ATTRIBUTE_DIRECTORY), + + // MoveFile flags + INT_CONSTANT(MOVEFILE_COPY_ALLOWED), + INT_CONSTANT(MOVEFILE_REPLACE_EXISTING), + + // GetFileAttributes error constant + INT_CONSTANT(INVALID_FILE_ATTRIBUTES), + + // GetNamedSecurityInfo and SetNamedSecurityInfo constants + INT_CONSTANT(UNPROTECTED_DACL_SECURITY_INFORMATION), + INT_CONSTANT(SE_FILE_OBJECT), + INT_CONSTANT(DACL_SECURITY_INFORMATION), + + // Errors + INT_CONSTANT(ERROR_INVALID_HANDLE), + INT_CONSTANT(ERROR_ACCESS_DENIED), + INT_CONSTANT(ERROR_DIR_NOT_EMPTY), + INT_CONSTANT(ERROR_FILE_EXISTS), + INT_CONSTANT(ERROR_ALREADY_EXISTS), + INT_CONSTANT(ERROR_FILE_NOT_FOUND), + INT_CONSTANT(ERROR_NO_MORE_FILES), + INT_CONSTANT(ERROR_PATH_NOT_FOUND), + INT_CONSTANT(ERROR_BAD_ARGUMENTS), + INT_CONSTANT(ERROR_SHARING_VIOLATION), + INT_CONSTANT(ERROR_NOT_SUPPORTED), + + PROP_END}; +#endif // defined(XP_WIN) + +/** + * Get a field of an object as an object. + * + * If the field does not exist, create it. If it exists but is not an + * object, throw a JS error. + */ +JSObject* GetOrCreateObjectProperty(JSContext* cx, + JS::Handle<JSObject*> aObject, + const char* aProperty) { + JS::Rooted<JS::Value> val(cx); + if (!JS_GetProperty(cx, aObject, aProperty, &val)) { + return nullptr; + } + if (!val.isUndefined()) { + if (val.isObject()) { + return &val.toObject(); + } + + JS_ReportErrorNumberASCII(cx, js::GetErrorMessage, nullptr, + JSMSG_UNEXPECTED_TYPE, aProperty, + "not an object"); + return nullptr; + } + return JS_DefineObject(cx, aObject, aProperty, nullptr, JSPROP_ENUMERATE); +} + +/** + * Set a property of an object from a nsString. + * + * If the nsString is void (i.e. IsVoid is true), do nothing. + */ +bool SetStringProperty(JSContext* cx, JS::Handle<JSObject*> aObject, + const char* aProperty, const nsString aValue) { + if (aValue.IsVoid()) { + return true; + } + JSString* strValue = JS_NewUCStringCopyZ(cx, aValue.get()); + NS_ENSURE_TRUE(strValue, false); + JS::Rooted<JS::Value> valValue(cx, JS::StringValue(strValue)); + return JS_SetProperty(cx, aObject, aProperty, valValue); +} + +/** + * Define OS-specific constants. + * + * This function creates or uses JS object |OS.Constants| to store + * all its constants. + */ +bool OSFileConstantsService::DefineOSFileConstants( + JSContext* aCx, JS::Handle<JSObject*> aGlobal) { + if (!mInitialized) { + JS_ReportErrorNumberASCII(aCx, js::GetErrorMessage, nullptr, + JSMSG_CANT_OPEN, "OSFileConstants", + "initialization has failed"); + return false; + } + + JS::Rooted<JSObject*> objOS(aCx); + if (!(objOS = GetOrCreateObjectProperty(aCx, aGlobal, "OS"))) { + return false; + } + JS::Rooted<JSObject*> objConstants(aCx); + if (!(objConstants = GetOrCreateObjectProperty(aCx, objOS, "Constants"))) { + return false; + } + + // Build OS.Constants.libc + + JS::Rooted<JSObject*> objLibc(aCx); + if (!(objLibc = GetOrCreateObjectProperty(aCx, objConstants, "libc"))) { + return false; + } + if (!dom::DefineConstants(aCx, objLibc, gLibcProperties)) { + return false; + } + +#if defined(XP_WIN) + // Build OS.Constants.Win + + JS::Rooted<JSObject*> objWin(aCx); + if (!(objWin = GetOrCreateObjectProperty(aCx, objConstants, "Win"))) { + return false; + } + if (!dom::DefineConstants(aCx, objWin, gWinProperties)) { + return false; + } +#endif // defined(XP_WIN) + + // Build OS.Constants.Sys + + JS::Rooted<JSObject*> objSys(aCx); + if (!(objSys = GetOrCreateObjectProperty(aCx, objConstants, "Sys"))) { + return false; + } + + if (!JS_DefineProperty( + aCx, objSys, "umask", mUserUmask, + JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT)) { + return false; + } + + return true; +} + +NS_IMPL_ISUPPORTS(OSFileConstantsService, nsIOSFileConstantsService, + nsIObserver) + +/* static */ +already_AddRefed<OSFileConstantsService> OSFileConstantsService::GetOrCreate() { + if (!gInstance) { + MOZ_ASSERT(NS_IsMainThread()); + + RefPtr<OSFileConstantsService> service = new OSFileConstantsService(); + nsresult rv = service->InitOSFileConstants(); + if (NS_WARN_IF(NS_FAILED(rv))) { + return nullptr; + } + + gInstance = std::move(service); + ClearOnShutdown(&gInstance); + } + + RefPtr<OSFileConstantsService> copy = gInstance; + return copy.forget(); +} + +OSFileConstantsService::OSFileConstantsService() + : mInitialized(false), mUserUmask(0) { + MOZ_ASSERT(NS_IsMainThread()); +} + +OSFileConstantsService::~OSFileConstantsService() { + MOZ_ASSERT(NS_IsMainThread()); +} + +NS_IMETHODIMP +OSFileConstantsService::Init(JSContext* aCx) { + MOZ_ASSERT(NS_IsMainThread()); + + nsresult rv = InitOSFileConstants(); + if (NS_FAILED(rv)) { + return rv; + } + + mozJSModuleLoader* loader = mozJSModuleLoader::Get(); + JS::Rooted<JSObject*> targetObj(aCx); + loader->FindTargetObject(aCx, &targetObj); + + if (!DefineOSFileConstants(aCx, targetObj)) { + return NS_ERROR_FAILURE; + } + + return NS_OK; +} + +} // namespace mozilla |