#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
-#if HAVE_DIRENT_H
-# include <dirent.h>
-# define NAMLEN(dirent) strlen((dirent)->d_name)
-#else
-# define dirent direct
-# define NAMLEN(dirent) (dirent)->d_namlen
-# if HAVE_SYS_NDIR_H
-# include <sys/ndir.h>
-# endif
-# if HAVE_SYS_DIR_H
-# include <sys/dir.h>
-# endif
-# if HAVE_NDIR_H
-# include <ndir.h>
-# endif
-#endif
+
+#include <dirent.h>
+#include <pwd.h>
#ifdef __APPLE__
#include <mach-o/dyld.h>
+#include <sys/attr.h>
#endif
-// Both stdio.h and cstdio are included via different pathes and
+// Both stdio.h and cstdio are included via different paths and
// stdcxx's cstdio doesn't include stdio.h, so it doesn't #undef the macros
// either.
#undef ferror
# define PATH_MAX 4096
#endif
-using namespace llvm;
-
-namespace {
- /// This class automatically closes the given file descriptor when it goes out
- /// of scope. You can take back explicit ownership of the file descriptor by
- /// calling take(). The destructor does not verify that close was successful.
- /// Therefore, never allow this class to call close on a file descriptor that
- /// has been read from or written to.
- struct AutoFD {
- int FileDescriptor;
-
- AutoFD(int fd) : FileDescriptor(fd) {}
- ~AutoFD() {
- if (FileDescriptor >= 0)
- ::close(FileDescriptor);
- }
-
- int take() {
- int ret = FileDescriptor;
- FileDescriptor = -1;
- return ret;
- }
-
- operator int() const {return FileDescriptor;}
- };
-}
+#include <sys/types.h>
+#if !defined(__APPLE__) && !defined(__OpenBSD__) && !defined(__FreeBSD__) && \
+ !defined(__linux__)
+#include <sys/statvfs.h>
+#define STATVFS statvfs
+#define FSTATVFS fstatvfs
+#define STATVFS_F_FRSIZE(vfs) vfs.f_frsize
+#else
+#if defined(__OpenBSD__) || defined(__FreeBSD__)
+#include <sys/mount.h>
+#include <sys/param.h>
+#elif defined(__linux__)
+#if defined(HAVE_LINUX_MAGIC_H)
+#include <linux/magic.h>
+#else
+#if defined(HAVE_LINUX_NFS_FS_H)
+#include <linux/nfs_fs.h>
+#endif
+#if defined(HAVE_LINUX_SMB_H)
+#include <linux/smb.h>
+#endif
+#endif
+#include <sys/vfs.h>
+#else
+#include <sys/mount.h>
+#endif
+#define STATVFS statfs
+#define FSTATVFS fstatfs
+#define STATVFS_F_FRSIZE(vfs) static_cast<uint64_t>(vfs.f_bsize)
+#endif
-static error_code TempDir(SmallVectorImpl<char> &result) {
- // FIXME: Don't use TMPDIR if program is SUID or SGID enabled.
- const char *dir = 0;
- (dir = std::getenv("TMPDIR")) || (dir = std::getenv("TMP")) ||
- (dir = std::getenv("TEMP")) || (dir = std::getenv("TEMPDIR")) ||
-#ifdef P_tmpdir
- (dir = P_tmpdir) ||
+#if defined(__NetBSD__)
+#define STATVFS_F_FLAG(vfs) (vfs).f_flag
+#else
+#define STATVFS_F_FLAG(vfs) (vfs).f_flags
#endif
- (dir = "/tmp");
- result.clear();
- StringRef d(dir);
- result.append(d.begin(), d.end());
- return error_code::success();
-}
+using namespace llvm;
namespace llvm {
namespace sys {
namespace fs {
-#if defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
- defined(__OpenBSD__) || defined(__minix) || defined(__FreeBSD_kernel__) || \
- defined(__linux__) || defined(__CYGWIN__) || defined(__DragonFly__)
+
+const file_t kInvalidFile = -1;
+
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
+ defined(__minix) || defined(__FreeBSD_kernel__) || defined(__linux__) || \
+ defined(__CYGWIN__) || defined(__DragonFly__) || defined(_AIX)
static int
test_dir(char ret[PATH_MAX], const char *dir, const char *bin)
-{
+{
struct stat sb;
char fullpath[PATH_MAX];
snprintf(fullpath, PATH_MAX, "%s/%s", dir, bin);
- if (realpath(fullpath, ret) == NULL)
- return (1);
+ if (!realpath(fullpath, ret))
+ return 1;
if (stat(fullpath, &sb) != 0)
- return (1);
+ return 1;
- return (0);
+ return 0;
}
static char *
/* First approach: absolute path. */
if (bin[0] == '/') {
if (test_dir(ret, "/", bin) == 0)
- return (ret);
- return (NULL);
+ return ret;
+ return nullptr;
}
/* Second approach: relative path. */
- if (strchr(bin, '/') != NULL) {
+ if (strchr(bin, '/')) {
char cwd[PATH_MAX];
- if (getcwd(cwd, PATH_MAX) == NULL)
- return (NULL);
+ if (!getcwd(cwd, PATH_MAX))
+ return nullptr;
if (test_dir(ret, cwd, bin) == 0)
- return (ret);
- return (NULL);
+ return ret;
+ return nullptr;
}
/* Third approach: $PATH */
- if ((pv = getenv("PATH")) == NULL)
- return (NULL);
+ if ((pv = getenv("PATH")) == nullptr)
+ return nullptr;
s = pv = strdup(pv);
- if (pv == NULL)
- return (NULL);
- while ((t = strsep(&s, ":")) != NULL) {
+ if (!pv)
+ return nullptr;
+ while ((t = strsep(&s, ":")) != nullptr) {
if (test_dir(ret, t, bin) == 0) {
free(pv);
- return (ret);
+ return ret;
}
}
free(pv);
- return (NULL);
+ return nullptr;
}
#endif // __FreeBSD__ || __NetBSD__ || __FreeBSD_kernel__
if (realpath(exe_path, link_path))
return link_path;
}
-#elif defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
- defined(__OpenBSD__) || defined(__minix) || defined(__DragonFly__) || \
- defined(__FreeBSD_kernel__)
+#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
+ defined(__minix) || defined(__DragonFly__) || \
+ defined(__FreeBSD_kernel__) || defined(_AIX)
char exe_path[PATH_MAX];
if (getprogpath(exe_path, argv0) != NULL)
// /proc is not always mounted under Linux (chroot for example).
ssize_t len = readlink(aPath.str().c_str(), exe_path, sizeof(exe_path));
if (len >= 0)
- return StringRef(exe_path, len);
+ return std::string(exe_path, len);
} else {
// Fall back to the classical detection.
- if (getprogpath(exe_path, argv0) != NULL)
- return exe_path;
+ if (getprogpath(exe_path, argv0))
+ return exe_path;
}
-#elif defined(HAVE_DLFCN_H)
+#elif defined(HAVE_DLFCN_H) && defined(HAVE_DLADDR)
// Use dladdr to get executable path if available.
Dl_info DLInfo;
int err = dladdr(MainAddr, &DLInfo);
return "";
}
-TimeValue file_status::getLastModificationTime() const {
- TimeValue Ret;
- Ret.fromEpochTime(fs_st_mtime);
- return Ret;
+TimePoint<> basic_file_status::getLastAccessedTime() const {
+ return toTimePoint(fs_st_atime);
+}
+
+TimePoint<> basic_file_status::getLastModificationTime() const {
+ return toTimePoint(fs_st_mtime);
}
UniqueID file_status::getUniqueID() const {
return UniqueID(fs_st_dev, fs_st_ino);
}
-error_code current_path(SmallVectorImpl<char> &result) {
+uint32_t file_status::getLinkCount() const {
+ return fs_st_nlinks;
+}
+
+ErrorOr<space_info> disk_space(const Twine &Path) {
+ struct STATVFS Vfs;
+ if (::STATVFS(Path.str().c_str(), &Vfs))
+ return std::error_code(errno, std::generic_category());
+ auto FrSize = STATVFS_F_FRSIZE(Vfs);
+ space_info SpaceInfo;
+ SpaceInfo.capacity = static_cast<uint64_t>(Vfs.f_blocks) * FrSize;
+ SpaceInfo.free = static_cast<uint64_t>(Vfs.f_bfree) * FrSize;
+ SpaceInfo.available = static_cast<uint64_t>(Vfs.f_bavail) * FrSize;
+ return SpaceInfo;
+}
+
+std::error_code current_path(SmallVectorImpl<char> &result) {
result.clear();
const char *pwd = ::getenv("PWD");
!llvm::sys::fs::status(".", DotStatus) &&
PWDStatus.getUniqueID() == DotStatus.getUniqueID()) {
result.append(pwd, pwd + strlen(pwd));
- return error_code::success();
+ return std::error_code();
}
#ifdef MAXPATHLEN
#endif
while (true) {
- if (::getcwd(result.data(), result.capacity()) == 0) {
+ if (::getcwd(result.data(), result.capacity()) == nullptr) {
// See if there was a real error.
- if (errno != errc::not_enough_memory)
- return error_code(errno, system_category());
+ if (errno != ENOMEM)
+ return std::error_code(errno, std::generic_category());
// Otherwise there just wasn't enough space.
result.reserve(result.capacity() * 2);
} else
}
result.set_size(strlen(result.data()));
- return error_code::success();
+ return std::error_code();
}
-error_code create_directory(const Twine &path, bool IgnoreExisting) {
+std::error_code set_current_path(const Twine &path) {
SmallString<128> path_storage;
StringRef p = path.toNullTerminatedStringRef(path_storage);
- if (::mkdir(p.begin(), S_IRWXU | S_IRWXG) == -1) {
- if (errno != errc::file_exists || !IgnoreExisting)
- return error_code(errno, system_category());
+ if (::chdir(p.begin()) == -1)
+ return std::error_code(errno, std::generic_category());
+
+ return std::error_code();
+}
+
+std::error_code create_directory(const Twine &path, bool IgnoreExisting,
+ perms Perms) {
+ SmallString<128> path_storage;
+ StringRef p = path.toNullTerminatedStringRef(path_storage);
+
+ if (::mkdir(p.begin(), Perms) == -1) {
+ if (errno != EEXIST || !IgnoreExisting)
+ return std::error_code(errno, std::generic_category());
}
- return error_code::success();
+ return std::error_code();
+}
+
+// Note that we are using symbolic link because hard links are not supported by
+// all filesystems (SMB doesn't).
+std::error_code create_link(const Twine &to, const Twine &from) {
+ // Get arguments.
+ SmallString<128> from_storage;
+ SmallString<128> to_storage;
+ StringRef f = from.toNullTerminatedStringRef(from_storage);
+ StringRef t = to.toNullTerminatedStringRef(to_storage);
+
+ if (::symlink(t.begin(), f.begin()) == -1)
+ return std::error_code(errno, std::generic_category());
+
+ return std::error_code();
}
-error_code create_hard_link(const Twine &to, const Twine &from) {
+std::error_code create_hard_link(const Twine &to, const Twine &from) {
// Get arguments.
SmallString<128> from_storage;
SmallString<128> to_storage;
StringRef t = to.toNullTerminatedStringRef(to_storage);
if (::link(t.begin(), f.begin()) == -1)
- return error_code(errno, system_category());
+ return std::error_code(errno, std::generic_category());
- return error_code::success();
+ return std::error_code();
}
-error_code remove(const Twine &path, bool IgnoreNonExisting) {
+std::error_code remove(const Twine &path, bool IgnoreNonExisting) {
SmallString<128> path_storage;
StringRef p = path.toNullTerminatedStringRef(path_storage);
struct stat buf;
- if (stat(p.begin(), &buf) != 0) {
- if (errno != errc::no_such_file_or_directory || !IgnoreNonExisting)
- return error_code(errno, system_category());
- return error_code::success();
+ if (lstat(p.begin(), &buf) != 0) {
+ if (errno != ENOENT || !IgnoreNonExisting)
+ return std::error_code(errno, std::generic_category());
+ return std::error_code();
}
// Note: this check catches strange situations. In all cases, LLVM should
// check ensures that what we're trying to erase is a regular file. It
// effectively prevents LLVM from erasing things like /dev/null, any block
// special file, or other things that aren't "regular" files.
- if (!S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode))
+ if (!S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode) && !S_ISLNK(buf.st_mode))
return make_error_code(errc::operation_not_permitted);
if (::remove(p.begin()) == -1) {
- if (errno != errc::no_such_file_or_directory || !IgnoreNonExisting)
- return error_code(errno, system_category());
+ if (errno != ENOENT || !IgnoreNonExisting)
+ return std::error_code(errno, std::generic_category());
}
- return error_code::success();
+ return std::error_code();
+}
+
+static bool is_local_impl(struct STATVFS &Vfs) {
+#if defined(__linux__)
+#ifndef NFS_SUPER_MAGIC
+#define NFS_SUPER_MAGIC 0x6969
+#endif
+#ifndef SMB_SUPER_MAGIC
+#define SMB_SUPER_MAGIC 0x517B
+#endif
+#ifndef CIFS_MAGIC_NUMBER
+#define CIFS_MAGIC_NUMBER 0xFF534D42
+#endif
+ switch ((uint32_t)Vfs.f_type) {
+ case NFS_SUPER_MAGIC:
+ case SMB_SUPER_MAGIC:
+ case CIFS_MAGIC_NUMBER:
+ return false;
+ default:
+ return true;
+ }
+#elif defined(__CYGWIN__)
+ // Cygwin doesn't expose this information; would need to use Win32 API.
+ return false;
+#elif defined(__Fuchsia__)
+ // Fuchsia doesn't yet support remote filesystem mounts.
+ return true;
+#elif defined(__sun)
+ // statvfs::f_basetype contains a null-terminated FSType name of the mounted target
+ StringRef fstype(Vfs.f_basetype);
+ // NFS is the only non-local fstype??
+ return !fstype.equals("nfs");
+#else
+ return !!(STATVFS_F_FLAG(Vfs) & MNT_LOCAL);
+#endif
+}
+
+std::error_code is_local(const Twine &Path, bool &Result) {
+ struct STATVFS Vfs;
+ if (::STATVFS(Path.str().c_str(), &Vfs))
+ return std::error_code(errno, std::generic_category());
+
+ Result = is_local_impl(Vfs);
+ return std::error_code();
}
-error_code rename(const Twine &from, const Twine &to) {
+std::error_code is_local(int FD, bool &Result) {
+ struct STATVFS Vfs;
+ if (::FSTATVFS(FD, &Vfs))
+ return std::error_code(errno, std::generic_category());
+
+ Result = is_local_impl(Vfs);
+ return std::error_code();
+}
+
+std::error_code rename(const Twine &from, const Twine &to) {
// Get arguments.
SmallString<128> from_storage;
SmallString<128> to_storage;
StringRef t = to.toNullTerminatedStringRef(to_storage);
if (::rename(f.begin(), t.begin()) == -1)
- return error_code(errno, system_category());
+ return std::error_code(errno, std::generic_category());
- return error_code::success();
+ return std::error_code();
}
-error_code resize_file(const Twine &path, uint64_t size) {
- SmallString<128> path_storage;
- StringRef p = path.toNullTerminatedStringRef(path_storage);
-
- if (::truncate(p.begin(), size) == -1)
- return error_code(errno, system_category());
-
- return error_code::success();
+std::error_code resize_file(int FD, uint64_t Size) {
+#if defined(HAVE_POSIX_FALLOCATE)
+ // If we have posix_fallocate use it. Unlike ftruncate it always allocates
+ // space, so we get an error if the disk is full.
+ if (int Err = ::posix_fallocate(FD, 0, Size)) {
+ if (Err != EINVAL && Err != EOPNOTSUPP)
+ return std::error_code(Err, std::generic_category());
+ }
+#endif
+ // Use ftruncate as a fallback. It may or may not allocate space. At least on
+ // OS X with HFS+ it does.
+ if (::ftruncate(FD, Size) == -1)
+ return std::error_code(errno, std::generic_category());
+
+ return std::error_code();
+}
+
+static int convertAccessMode(AccessMode Mode) {
+ switch (Mode) {
+ case AccessMode::Exist:
+ return F_OK;
+ case AccessMode::Write:
+ return W_OK;
+ case AccessMode::Execute:
+ return R_OK | X_OK; // scripts also need R_OK.
+ }
+ llvm_unreachable("invalid enum");
}
-error_code exists(const Twine &path, bool &result) {
- SmallString<128> path_storage;
- StringRef p = path.toNullTerminatedStringRef(path_storage);
+std::error_code access(const Twine &Path, AccessMode Mode) {
+ SmallString<128> PathStorage;
+ StringRef P = Path.toNullTerminatedStringRef(PathStorage);
- if (::access(p.begin(), F_OK) == -1) {
- if (errno != errc::no_such_file_or_directory)
- return error_code(errno, system_category());
- result = false;
- } else
- result = true;
+ if (::access(P.begin(), convertAccessMode(Mode)) == -1)
+ return std::error_code(errno, std::generic_category());
- return error_code::success();
-}
+ if (Mode == AccessMode::Execute) {
+ // Don't say that directories are executable.
+ struct stat buf;
+ if (0 != stat(P.begin(), &buf))
+ return errc::permission_denied;
+ if (!S_ISREG(buf.st_mode))
+ return errc::permission_denied;
+ }
-bool can_write(const Twine &Path) {
- SmallString<128> PathStorage;
- StringRef P = Path.toNullTerminatedStringRef(PathStorage);
- return 0 == access(P.begin(), W_OK);
+ return std::error_code();
}
bool can_execute(const Twine &Path) {
- SmallString<128> PathStorage;
- StringRef P = Path.toNullTerminatedStringRef(PathStorage);
-
- if (0 != access(P.begin(), R_OK | X_OK))
- return false;
- struct stat buf;
- if (0 != stat(P.begin(), &buf))
- return false;
- if (!S_ISREG(buf.st_mode))
- return false;
- return true;
+ return !access(Path, AccessMode::Execute);
}
bool equivalent(file_status A, file_status B) {
A.fs_st_ino == B.fs_st_ino;
}
-error_code equivalent(const Twine &A, const Twine &B, bool &result) {
+std::error_code equivalent(const Twine &A, const Twine &B, bool &result) {
file_status fsA, fsB;
- if (error_code ec = status(A, fsA)) return ec;
- if (error_code ec = status(B, fsB)) return ec;
+ if (std::error_code ec = status(A, fsA))
+ return ec;
+ if (std::error_code ec = status(B, fsB))
+ return ec;
result = equivalent(fsA, fsB);
- return error_code::success();
+ return std::error_code();
}
-static error_code fillStatus(int StatRet, const struct stat &Status,
+static void expandTildeExpr(SmallVectorImpl<char> &Path) {
+ StringRef PathStr(Path.begin(), Path.size());
+ if (PathStr.empty() || !PathStr.startswith("~"))
+ return;
+
+ PathStr = PathStr.drop_front();
+ StringRef Expr =
+ PathStr.take_until([](char c) { return path::is_separator(c); });
+ StringRef Remainder = PathStr.substr(Expr.size() + 1);
+ SmallString<128> Storage;
+ if (Expr.empty()) {
+ // This is just ~/..., resolve it to the current user's home dir.
+ if (!path::home_directory(Storage)) {
+ // For some reason we couldn't get the home directory. Just exit.
+ return;
+ }
+
+ // Overwrite the first character and insert the rest.
+ Path[0] = Storage[0];
+ Path.insert(Path.begin() + 1, Storage.begin() + 1, Storage.end());
+ return;
+ }
+
+ // This is a string of the form ~username/, look up this user's entry in the
+ // password database.
+ struct passwd *Entry = nullptr;
+ std::string User = Expr.str();
+ Entry = ::getpwnam(User.c_str());
+
+ if (!Entry) {
+ // Unable to look up the entry, just return back the original path.
+ return;
+ }
+
+ Storage = Remainder;
+ Path.clear();
+ Path.append(Entry->pw_dir, Entry->pw_dir + strlen(Entry->pw_dir));
+ llvm::sys::path::append(Path, Storage);
+}
+
+static std::error_code fillStatus(int StatRet, const struct stat &Status,
file_status &Result) {
if (StatRet != 0) {
- error_code ec(errno, system_category());
+ std::error_code ec(errno, std::generic_category());
if (ec == errc::no_such_file_or_directory)
Result = file_status(file_type::file_not_found);
else
Type = file_type::fifo_file;
else if (S_ISSOCK(Status.st_mode))
Type = file_type::socket_file;
+ else if (S_ISLNK(Status.st_mode))
+ Type = file_type::symlink_file;
- perms Perms = static_cast<perms>(Status.st_mode);
- Result =
- file_status(Type, Perms, Status.st_dev, Status.st_ino, Status.st_mtime,
- Status.st_uid, Status.st_gid, Status.st_size);
+ perms Perms = static_cast<perms>(Status.st_mode) & all_perms;
+ Result = file_status(Type, Perms, Status.st_dev, Status.st_nlink,
+ Status.st_ino, Status.st_atime, Status.st_mtime,
+ Status.st_uid, Status.st_gid, Status.st_size);
- return error_code::success();
+ return std::error_code();
}
-error_code status(const Twine &Path, file_status &Result) {
+std::error_code status(const Twine &Path, file_status &Result, bool Follow) {
SmallString<128> PathStorage;
StringRef P = Path.toNullTerminatedStringRef(PathStorage);
struct stat Status;
- int StatRet = ::stat(P.begin(), &Status);
+ int StatRet = (Follow ? ::stat : ::lstat)(P.begin(), &Status);
return fillStatus(StatRet, Status, Result);
}
-error_code status(int FD, file_status &Result) {
+std::error_code status(int FD, file_status &Result) {
struct stat Status;
int StatRet = ::fstat(FD, &Status);
return fillStatus(StatRet, Status, Result);
}
-error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
+std::error_code setPermissions(const Twine &Path, perms Permissions) {
+ SmallString<128> PathStorage;
+ StringRef P = Path.toNullTerminatedStringRef(PathStorage);
+
+ if (::chmod(P.begin(), Permissions))
+ return std::error_code(errno, std::generic_category());
+ return std::error_code();
+}
+
+std::error_code setLastModificationAndAccessTime(int FD, TimePoint<> Time) {
#if defined(HAVE_FUTIMENS)
timespec Times[2];
- Times[0].tv_sec = Time.toEpochTime();
- Times[0].tv_nsec = 0;
- Times[1] = Times[0];
+ Times[0] = Times[1] = sys::toTimeSpec(Time);
if (::futimens(FD, Times))
- return error_code(errno, system_category());
- return error_code::success();
+ return std::error_code(errno, std::generic_category());
+ return std::error_code();
#elif defined(HAVE_FUTIMES)
timeval Times[2];
- Times[0].tv_sec = Time.toEpochTime();
- Times[0].tv_usec = 0;
- Times[1] = Times[0];
+ Times[0] = Times[1] = sys::toTimeVal(
+ std::chrono::time_point_cast<std::chrono::microseconds>(Time));
if (::futimes(FD, Times))
- return error_code(errno, system_category());
- return error_code::success();
+ return std::error_code(errno, std::generic_category());
+ return std::error_code();
#else
#warning Missing futimes() and futimens()
- return make_error_code(errc::not_supported);
+ return make_error_code(errc::function_not_supported);
#endif
}
-error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) {
- AutoFD ScopedFD(FD);
- if (!CloseFD)
- ScopedFD.take();
-
- // Figure out how large the file is.
- struct stat FileInfo;
- if (fstat(FD, &FileInfo) == -1)
- return error_code(errno, system_category());
- uint64_t FileSize = FileInfo.st_size;
-
- if (Size == 0)
- Size = FileSize;
- else if (FileSize < Size) {
- // We need to grow the file.
- if (ftruncate(FD, Size) == -1)
- return error_code(errno, system_category());
- }
+std::error_code mapped_file_region::init(int FD, uint64_t Offset,
+ mapmode Mode) {
+ assert(Size != 0);
int flags = (Mode == readwrite) ? MAP_SHARED : MAP_PRIVATE;
int prot = (Mode == readonly) ? PROT_READ : (PROT_READ | PROT_WRITE);
-#ifdef MAP_FILE
- flags |= MAP_FILE;
+#if defined(__APPLE__)
+ //----------------------------------------------------------------------
+ // Newer versions of MacOSX have a flag that will allow us to read from
+ // binaries whose code signature is invalid without crashing by using
+ // the MAP_RESILIENT_CODESIGN flag. Also if a file from removable media
+ // is mapped we can avoid crashing and return zeroes to any pages we try
+ // to read if the media becomes unavailable by using the
+ // MAP_RESILIENT_MEDIA flag. These flags are only usable when mapping
+ // with PROT_READ, so take care not to specify them otherwise.
+ //----------------------------------------------------------------------
+ if (Mode == readonly) {
+#if defined(MAP_RESILIENT_CODESIGN)
+ flags |= MAP_RESILIENT_CODESIGN;
+#endif
+#if defined(MAP_RESILIENT_MEDIA)
+ flags |= MAP_RESILIENT_MEDIA;
#endif
- Mapping = ::mmap(0, Size, prot, flags, FD, Offset);
- if (Mapping == MAP_FAILED)
- return error_code(errno, system_category());
- return error_code::success();
-}
-
-mapped_file_region::mapped_file_region(const Twine &path,
- mapmode mode,
- uint64_t length,
- uint64_t offset,
- error_code &ec)
- : Mode(mode)
- , Size(length)
- , Mapping() {
- // Make sure that the requested size fits within SIZE_T.
- if (length > std::numeric_limits<size_t>::max()) {
- ec = make_error_code(errc::invalid_argument);
- return;
- }
-
- SmallString<128> path_storage;
- StringRef name = path.toNullTerminatedStringRef(path_storage);
- int oflags = (mode == readonly) ? O_RDONLY : O_RDWR;
- int ofd = ::open(name.begin(), oflags);
- if (ofd == -1) {
- ec = error_code(errno, system_category());
- return;
}
+#endif // #if defined (__APPLE__)
- ec = init(ofd, true, offset);
- if (ec)
- Mapping = 0;
-}
-
-mapped_file_region::mapped_file_region(int fd,
- bool closefd,
- mapmode mode,
- uint64_t length,
- uint64_t offset,
- error_code &ec)
- : Mode(mode)
- , Size(length)
- , Mapping() {
- // Make sure that the requested size fits within SIZE_T.
- if (length > std::numeric_limits<size_t>::max()) {
- ec = make_error_code(errc::invalid_argument);
- return;
- }
+ Mapping = ::mmap(nullptr, Size, prot, flags, FD, Offset);
+ if (Mapping == MAP_FAILED)
+ return std::error_code(errno, std::generic_category());
+ return std::error_code();
+}
- ec = init(fd, closefd, offset);
+mapped_file_region::mapped_file_region(int fd, mapmode mode, size_t length,
+ uint64_t offset, std::error_code &ec)
+ : Size(length), Mapping(), FD(fd), Mode(mode) {
+ (void)FD;
+ (void)Mode;
+ ec = init(fd, offset, mode);
if (ec)
- Mapping = 0;
+ Mapping = nullptr;
}
mapped_file_region::~mapped_file_region() {
::munmap(Mapping, Size);
}
-#if LLVM_HAS_RVALUE_REFERENCES
-mapped_file_region::mapped_file_region(mapped_file_region &&other)
- : Mode(other.Mode), Size(other.Size), Mapping(other.Mapping) {
- other.Mapping = 0;
-}
-#endif
-
-mapped_file_region::mapmode mapped_file_region::flags() const {
- assert(Mapping && "Mapping failed but used anyway!");
- return Mode;
-}
-
-uint64_t mapped_file_region::size() const {
+size_t mapped_file_region::size() const {
assert(Mapping && "Mapping failed but used anyway!");
return Size;
}
char *mapped_file_region::data() const {
assert(Mapping && "Mapping failed but used anyway!");
- assert(Mode != readonly && "Cannot get non-const data for readonly mapping!");
return reinterpret_cast<char*>(Mapping);
}
}
int mapped_file_region::alignment() {
- return process::get_self()->page_size();
+ return Process::getPageSize();
}
-error_code detail::directory_iterator_construct(detail::DirIterState &it,
- StringRef path){
+std::error_code detail::directory_iterator_construct(detail::DirIterState &it,
+ StringRef path,
+ bool follow_symlinks) {
SmallString<128> path_null(path);
DIR *directory = ::opendir(path_null.c_str());
- if (directory == 0)
- return error_code(errno, system_category());
+ if (!directory)
+ return std::error_code(errno, std::generic_category());
it.IterationHandle = reinterpret_cast<intptr_t>(directory);
// Add something for replace_filename to replace.
path::append(path_null, ".");
- it.CurrentEntry = directory_entry(path_null.str());
+ it.CurrentEntry = directory_entry(path_null.str(), follow_symlinks);
return directory_iterator_increment(it);
}
-error_code detail::directory_iterator_destruct(detail::DirIterState &it) {
+std::error_code detail::directory_iterator_destruct(detail::DirIterState &it) {
if (it.IterationHandle)
::closedir(reinterpret_cast<DIR *>(it.IterationHandle));
it.IterationHandle = 0;
it.CurrentEntry = directory_entry();
- return error_code::success();
+ return std::error_code();
}
-error_code detail::directory_iterator_increment(detail::DirIterState &it) {
+std::error_code detail::directory_iterator_increment(detail::DirIterState &it) {
errno = 0;
dirent *cur_dir = ::readdir(reinterpret_cast<DIR *>(it.IterationHandle));
- if (cur_dir == 0 && errno != 0) {
- return error_code(errno, system_category());
- } else if (cur_dir != 0) {
- StringRef name(cur_dir->d_name, NAMLEN(cur_dir));
+ if (cur_dir == nullptr && errno != 0) {
+ return std::error_code(errno, std::generic_category());
+ } else if (cur_dir != nullptr) {
+ StringRef name(cur_dir->d_name);
if ((name.size() == 1 && name[0] == '.') ||
(name.size() == 2 && name[0] == '.' && name[1] == '.'))
return directory_iterator_increment(it);
} else
return directory_iterator_destruct(it);
- return error_code::success();
+ return std::error_code();
}
-error_code get_magic(const Twine &path, uint32_t len,
- SmallVectorImpl<char> &result) {
- SmallString<128> PathStorage;
- StringRef Path = path.toNullTerminatedStringRef(PathStorage);
- result.set_size(0);
-
- // Open path.
- std::FILE *file = std::fopen(Path.data(), "rb");
- if (file == 0)
- return error_code(errno, system_category());
-
- // Reserve storage.
- result.reserve(len);
-
- // Read magic!
- size_t size = std::fread(result.data(), 1, len, file);
- if (std::ferror(file) != 0) {
- std::fclose(file);
- return error_code(errno, system_category());
- } else if (size != len) {
- if (std::feof(file) != 0) {
- std::fclose(file);
- result.set_size(size);
- return make_error_code(errc::value_too_large);
- }
- }
- std::fclose(file);
- result.set_size(size);
- return error_code::success();
+ErrorOr<basic_file_status> directory_entry::status() const {
+ file_status s;
+ if (auto EC = fs::status(Path, s, FollowSymlinks))
+ return EC;
+ return s;
}
-error_code map_file_pages(const Twine &path, off_t file_offset, size_t size,
- bool map_writable, void *&result) {
- SmallString<128> path_storage;
- StringRef name = path.toNullTerminatedStringRef(path_storage);
- int oflags = map_writable ? O_RDWR : O_RDONLY;
- int ofd = ::open(name.begin(), oflags);
- if ( ofd == -1 )
- return error_code(errno, system_category());
- AutoFD fd(ofd);
- int flags = map_writable ? MAP_SHARED : MAP_PRIVATE;
- int prot = map_writable ? (PROT_READ|PROT_WRITE) : PROT_READ;
-#ifdef MAP_FILE
- flags |= MAP_FILE;
+#if !defined(F_GETPATH)
+static bool hasProcSelfFD() {
+ // If we have a /proc filesystem mounted, we can quickly establish the
+ // real name of the file with readlink
+ static const bool Result = (::access("/proc/self/fd", R_OK) == 0);
+ return Result;
+}
#endif
- result = ::mmap(0, size, prot, flags, fd, file_offset);
- if (result == MAP_FAILED) {
- return error_code(errno, system_category());
+
+static int nativeOpenFlags(CreationDisposition Disp, OpenFlags Flags,
+ FileAccess Access) {
+ int Result = 0;
+ if (Access == FA_Read)
+ Result |= O_RDONLY;
+ else if (Access == FA_Write)
+ Result |= O_WRONLY;
+ else if (Access == (FA_Read | FA_Write))
+ Result |= O_RDWR;
+
+ // This is for compatibility with old code that assumed F_Append implied
+ // would open an existing file. See Windows/Path.inc for a longer comment.
+ if (Flags & F_Append)
+ Disp = CD_OpenAlways;
+
+ if (Disp == CD_CreateNew) {
+ Result |= O_CREAT; // Create if it doesn't exist.
+ Result |= O_EXCL; // Fail if it does.
+ } else if (Disp == CD_CreateAlways) {
+ Result |= O_CREAT; // Create if it doesn't exist.
+ Result |= O_TRUNC; // Truncate if it does.
+ } else if (Disp == CD_OpenAlways) {
+ Result |= O_CREAT; // Create if it doesn't exist.
+ } else if (Disp == CD_OpenExisting) {
+ // Nothing special, just don't add O_CREAT and we get these semantics.
}
-
- return error_code::success();
-}
-error_code unmap_file_pages(void *base, size_t size) {
- if ( ::munmap(base, size) == -1 )
- return error_code(errno, system_category());
-
- return error_code::success();
+ if (Flags & F_Append)
+ Result |= O_APPEND;
+
+#ifdef O_CLOEXEC
+ if (!(Flags & OF_ChildInherit))
+ Result |= O_CLOEXEC;
+#endif
+
+ return Result;
}
-error_code openFileForRead(const Twine &Name, int &ResultFD) {
+std::error_code openFile(const Twine &Name, int &ResultFD,
+ CreationDisposition Disp, FileAccess Access,
+ OpenFlags Flags, unsigned Mode) {
+ int OpenFlags = nativeOpenFlags(Disp, Flags, Access);
+
SmallString<128> Storage;
StringRef P = Name.toNullTerminatedStringRef(Storage);
- while ((ResultFD = open(P.begin(), O_RDONLY)) < 0) {
+ while ((ResultFD = open(P.begin(), OpenFlags, Mode)) < 0) {
if (errno != EINTR)
- return error_code(errno, system_category());
+ return std::error_code(errno, std::generic_category());
}
- return error_code::success();
-}
-
-error_code openFileForWrite(const Twine &Name, int &ResultFD,
- sys::fs::OpenFlags Flags, unsigned Mode) {
- // Verify that we don't have both "append" and "excl".
- assert((!(Flags & sys::fs::F_Excl) || !(Flags & sys::fs::F_Append)) &&
- "Cannot specify both 'excl' and 'append' file creation flags!");
-
- int OpenFlags = O_CREAT;
+#ifndef O_CLOEXEC
+ if (!(Flags & OF_ChildInherit)) {
+ int r = fcntl(ResultFD, F_SETFD, FD_CLOEXEC);
+ (void)r;
+ assert(r == 0 && "fcntl(F_SETFD, FD_CLOEXEC) failed");
+ }
+#endif
+ return std::error_code();
+}
+
+Expected<int> openNativeFile(const Twine &Name, CreationDisposition Disp,
+ FileAccess Access, OpenFlags Flags,
+ unsigned Mode) {
+
+ int FD;
+ std::error_code EC = openFile(Name, FD, Disp, Access, Flags, Mode);
+ if (EC)
+ return errorCodeToError(EC);
+ return FD;
+}
+
+std::error_code openFileForRead(const Twine &Name, int &ResultFD,
+ OpenFlags Flags,
+ SmallVectorImpl<char> *RealPath) {
+ std::error_code EC =
+ openFile(Name, ResultFD, CD_OpenExisting, FA_Read, Flags, 0666);
+ if (EC)
+ return EC;
+
+ // Attempt to get the real name of the file, if the user asked
+ if(!RealPath)
+ return std::error_code();
+ RealPath->clear();
+#if defined(F_GETPATH)
+ // When F_GETPATH is availble, it is the quickest way to get
+ // the real path name.
+ char Buffer[MAXPATHLEN];
+ if (::fcntl(ResultFD, F_GETPATH, Buffer) != -1)
+ RealPath->append(Buffer, Buffer + strlen(Buffer));
+#else
+ char Buffer[PATH_MAX];
+ if (hasProcSelfFD()) {
+ char ProcPath[64];
+ snprintf(ProcPath, sizeof(ProcPath), "/proc/self/fd/%d", ResultFD);
+ ssize_t CharCount = ::readlink(ProcPath, Buffer, sizeof(Buffer));
+ if (CharCount > 0)
+ RealPath->append(Buffer, Buffer + CharCount);
+ } else {
+ SmallString<128> Storage;
+ StringRef P = Name.toNullTerminatedStringRef(Storage);
- if (Flags & F_RW)
- OpenFlags |= O_RDWR;
- else
- OpenFlags |= O_WRONLY;
+ // Use ::realpath to get the real path name
+ if (::realpath(P.begin(), Buffer) != nullptr)
+ RealPath->append(Buffer, Buffer + strlen(Buffer));
+ }
+#endif
+ return std::error_code();
+}
+
+Expected<file_t> openNativeFileForRead(const Twine &Name, OpenFlags Flags,
+ SmallVectorImpl<char> *RealPath) {
+ file_t ResultFD;
+ std::error_code EC = openFileForRead(Name, ResultFD, Flags, RealPath);
+ if (EC)
+ return errorCodeToError(EC);
+ return ResultFD;
+}
+
+void closeFile(file_t &F) {
+ ::close(F);
+ F = kInvalidFile;
+}
+
+template <typename T>
+static std::error_code remove_directories_impl(const T &Entry,
+ bool IgnoreErrors) {
+ std::error_code EC;
+ directory_iterator Begin(Entry, EC, false);
+ directory_iterator End;
+ while (Begin != End) {
+ auto &Item = *Begin;
+ ErrorOr<basic_file_status> st = Item.status();
+ if (!st && !IgnoreErrors)
+ return st.getError();
+
+ if (is_directory(*st)) {
+ EC = remove_directories_impl(Item, IgnoreErrors);
+ if (EC && !IgnoreErrors)
+ return EC;
+ }
- if (Flags & F_Append)
- OpenFlags |= O_APPEND;
- else
- OpenFlags |= O_TRUNC;
+ EC = fs::remove(Item.path(), true);
+ if (EC && !IgnoreErrors)
+ return EC;
- if (Flags & F_Excl)
- OpenFlags |= O_EXCL;
+ Begin.increment(EC);
+ if (EC && !IgnoreErrors)
+ return EC;
+ }
+ return std::error_code();
+}
+
+std::error_code remove_directories(const Twine &path, bool IgnoreErrors) {
+ auto EC = remove_directories_impl(path, IgnoreErrors);
+ if (EC && !IgnoreErrors)
+ return EC;
+ EC = fs::remove(path, true);
+ if (EC && !IgnoreErrors)
+ return EC;
+ return std::error_code();
+}
+
+std::error_code real_path(const Twine &path, SmallVectorImpl<char> &dest,
+ bool expand_tilde) {
+ dest.clear();
+ if (path.isTriviallyEmpty())
+ return std::error_code();
+
+ if (expand_tilde) {
+ SmallString<128> Storage;
+ path.toVector(Storage);
+ expandTildeExpr(Storage);
+ return real_path(Storage, dest, false);
+ }
SmallString<128> Storage;
- StringRef P = Name.toNullTerminatedStringRef(Storage);
- while ((ResultFD = open(P.begin(), OpenFlags, Mode)) < 0) {
- if (errno != EINTR)
- return error_code(errno, system_category());
- }
- return error_code::success();
+ StringRef P = path.toNullTerminatedStringRef(Storage);
+ char Buffer[PATH_MAX];
+ if (::realpath(P.begin(), Buffer) == nullptr)
+ return std::error_code(errno, std::generic_category());
+ dest.append(Buffer, Buffer + strlen(Buffer));
+ return std::error_code();
}
} // end namespace fs
namespace path {
bool home_directory(SmallVectorImpl<char> &result) {
- if (char *RequestedDir = getenv("HOME")) {
- result.clear();
- result.append(RequestedDir, RequestedDir + strlen(RequestedDir));
+ char *RequestedDir = getenv("HOME");
+ if (!RequestedDir) {
+ struct passwd *pw = getpwuid(getuid());
+ if (pw && pw->pw_dir)
+ RequestedDir = pw->pw_dir;
+ }
+ if (!RequestedDir)
+ return false;
+
+ result.clear();
+ result.append(RequestedDir, RequestedDir + strlen(RequestedDir));
+ return true;
+}
+
+static bool getDarwinConfDir(bool TempDir, SmallVectorImpl<char> &Result) {
+ #if defined(_CS_DARWIN_USER_TEMP_DIR) && defined(_CS_DARWIN_USER_CACHE_DIR)
+ // On Darwin, use DARWIN_USER_TEMP_DIR or DARWIN_USER_CACHE_DIR.
+ // macros defined in <unistd.h> on darwin >= 9
+ int ConfName = TempDir ? _CS_DARWIN_USER_TEMP_DIR
+ : _CS_DARWIN_USER_CACHE_DIR;
+ size_t ConfLen = confstr(ConfName, nullptr, 0);
+ if (ConfLen > 0) {
+ do {
+ Result.resize(ConfLen);
+ ConfLen = confstr(ConfName, Result.data(), Result.size());
+ } while (ConfLen > 0 && ConfLen != Result.size());
+
+ if (ConfLen > 0) {
+ assert(Result.back() == 0);
+ Result.pop_back();
+ return true;
+ }
+
+ Result.clear();
+ }
+ #endif
+ return false;
+}
+
+static bool getUserCacheDir(SmallVectorImpl<char> &Result) {
+ // First try using XDG_CACHE_HOME env variable,
+ // as specified in XDG Base Directory Specification at
+ // http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+ if (const char *XdgCacheDir = std::getenv("XDG_CACHE_HOME")) {
+ Result.clear();
+ Result.append(XdgCacheDir, XdgCacheDir + strlen(XdgCacheDir));
+ return true;
+ }
+
+ // Try Darwin configuration query
+ if (getDarwinConfDir(false, Result))
+ return true;
+
+ // Use "$HOME/.cache" if $HOME is available
+ if (home_directory(Result)) {
+ append(Result, ".cache");
return true;
}
return false;
}
+static const char *getEnvTempDir() {
+ // Check whether the temporary directory is specified by an environment
+ // variable.
+ const char *EnvironmentVariables[] = {"TMPDIR", "TMP", "TEMP", "TEMPDIR"};
+ for (const char *Env : EnvironmentVariables) {
+ if (const char *Dir = std::getenv(Env))
+ return Dir;
+ }
+
+ return nullptr;
+}
+
+static const char *getDefaultTempDir(bool ErasedOnReboot) {
+#ifdef P_tmpdir
+ if ((bool)P_tmpdir)
+ return P_tmpdir;
+#endif
+
+ if (ErasedOnReboot)
+ return "/tmp";
+ return "/var/tmp";
+}
+
+void system_temp_directory(bool ErasedOnReboot, SmallVectorImpl<char> &Result) {
+ Result.clear();
+
+ if (ErasedOnReboot) {
+ // There is no env variable for the cache directory.
+ if (const char *RequestedDir = getEnvTempDir()) {
+ Result.append(RequestedDir, RequestedDir + strlen(RequestedDir));
+ return;
+ }
+ }
+
+ if (getDarwinConfDir(ErasedOnReboot, Result))
+ return;
+
+ const char *RequestedDir = getDefaultTempDir(ErasedOnReboot);
+ Result.append(RequestedDir, RequestedDir + strlen(RequestedDir));
+}
+
} // end namespace path
} // end namespace sys
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