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gecko-dev/dom/system/OSFileConstants.cpp

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/* -*- 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 "mozJSComponentLoader.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;
}
nsCOMPtr<nsIXULRuntime> runtime =
do_GetService(XULRUNTIME_SERVICE_CONTRACTID);
if (runtime) {
nsAutoCString os;
DebugOnly<nsresult> rv = runtime->GetOS(os);
MOZ_ASSERT(NS_SUCCEEDED(rv));
JSString* strVersion = JS_NewStringCopyZ(aCx, os.get());
if (!strVersion) {
return false;
}
JS::Rooted<JS::Value> valVersion(aCx, JS::StringValue(strVersion));
if (!JS_SetProperty(aCx, objSys, "Name", valVersion)) {
return false;
}
}
#if defined(DEBUG)
JS::Rooted<JS::Value> valDebug(aCx, JS::TrueValue());
if (!JS_SetProperty(aCx, objSys, "DEBUG", valDebug)) {
return false;
}
#endif
#if defined(HAVE_64BIT_BUILD)
JS::Rooted<JS::Value> valBits(aCx, JS::Int32Value(64));
#else
JS::Rooted<JS::Value> valBits(aCx, JS::Int32Value(32));
#endif // defined (HAVE_64BIT_BUILD)
if (!JS_SetProperty(aCx, objSys, "bits", valBits)) {
return false;
}
if (!JS_DefineProperty(
aCx, objSys, "umask", mUserUmask,
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT)) {
return false;
}
// Build OS.Constants.Path
JS::Rooted<JSObject*> objPath(aCx);
if (!(objPath = GetOrCreateObjectProperty(aCx, objConstants, "Path"))) {
return false;
}
// Locate libxul
// Note that we don't actually provide the full path, only the name of the
// library, which is sufficient to link to the library using js-ctypes.
#if defined(XP_MACOSX)
// Under MacOS X, for some reason, libxul is called simply "XUL",
// and we need to provide the full path.
nsAutoString libxul;
libxul.Append(mPaths->libDir);
libxul.AppendLiteral("/XUL");
#else
// On other platforms, libxul is a library "xul" with regular
// library prefix/suffix.
nsAutoString libxul;
libxul.AppendLiteral(MOZ_DLL_PREFIX);
libxul.AppendLiteral("xul");
libxul.AppendLiteral(MOZ_DLL_SUFFIX);
#endif // defined(XP_MACOSX)
if (!SetStringProperty(aCx, objPath, "libxul", libxul)) {
return false;
}
if (!SetStringProperty(aCx, objPath, "libDir", mPaths->libDir)) {
return false;
}
if (!SetStringProperty(aCx, objPath, "tmpDir", mPaths->tmpDir)) {
return false;
}
// Configure profileDir only if it is available at this stage
if (!mPaths->profileDir.IsVoid() &&
!SetStringProperty(aCx, objPath, "profileDir", mPaths->profileDir)) {
return false;
}
// Configure localProfileDir only if it is available at this stage
if (!mPaths->localProfileDir.IsVoid() &&
!SetStringProperty(aCx, objPath, "localProfileDir",
mPaths->localProfileDir)) {
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;
}
mozJSComponentLoader* loader = mozJSComponentLoader::Get();
JS::Rooted<JSObject*> targetObj(aCx);
loader->FindTargetObject(aCx, &targetObj);
if (!DefineOSFileConstants(aCx, targetObj)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
} // namespace mozilla
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