//===----------------------------------------------------------------------===//
#include "Unix.h"
-#include "llvm/Support/Process.h"
+#include <limits.h>
+#include <stdio.h>
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
# include <ndir.h>
# endif
#endif
-#if HAVE_STDIO_H
-#include <stdio.h>
-#endif
-#if HAVE_LIMITS_H
-#include <limits.h>
-#endif
#ifdef __APPLE__
#include <mach-o/dyld.h>
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;}
- };
-
- 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) ||
-#endif
- (dir = "/tmp");
-
- result.clear();
- StringRef d(dir);
- result.append(d.begin(), d.end());
- return error_code::success();
- }
-}
-
-static error_code createUniqueEntity(const Twine &Model, int &ResultFD,
- SmallVectorImpl<char> &ResultPath,
- bool MakeAbsolute, unsigned Mode,
- FSEntity Type) {
- SmallString<128> ModelStorage;
- Model.toVector(ModelStorage);
-
- if (MakeAbsolute) {
- // Make model absolute by prepending a temp directory if it's not already.
- bool absolute = sys::path::is_absolute(Twine(ModelStorage));
- if (!absolute) {
- SmallString<128> TDir;
- if (error_code ec = TempDir(TDir)) return ec;
- sys::path::append(TDir, Twine(ModelStorage));
- ModelStorage.swap(TDir);
- }
- }
-
- // From here on, DO NOT modify model. It may be needed if the randomly chosen
- // path already exists.
- ResultPath = ModelStorage;
- // Null terminate.
- ResultPath.push_back(0);
- ResultPath.pop_back();
-
-retry_random_path:
- // Replace '%' with random chars.
- for (unsigned i = 0, e = ModelStorage.size(); i != e; ++i) {
- if (ModelStorage[i] == '%')
- ResultPath[i] = "0123456789abcdef"[sys::Process::GetRandomNumber() & 15];
- }
-
- // Try to open + create the file.
- switch (Type) {
- case FS_File: {
- int RandomFD = ::open(ResultPath.begin(), O_RDWR | O_CREAT | O_EXCL, Mode);
- if (RandomFD == -1) {
- int SavedErrno = errno;
- // If the file existed, try again, otherwise, error.
- if (SavedErrno == errc::file_exists)
- goto retry_random_path;
- return error_code(SavedErrno, system_category());
- }
-
- ResultFD = RandomFD;
- return error_code::success();
- }
-
- case FS_Name: {
- bool Exists;
- error_code EC = sys::fs::exists(ResultPath.begin(), Exists);
- if (EC)
- return EC;
- if (Exists)
- goto retry_random_path;
- return error_code::success();
- }
-
- case FS_Dir: {
- bool Existed;
- error_code EC = sys::fs::create_directory(ResultPath.begin(), Existed);
- if (EC)
- return EC;
- if (Existed)
- goto retry_random_path;
- return error_code::success();
- }
- }
- llvm_unreachable("Invalid Type");
-}
-
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(__linux__) || defined(__CYGWIN__) || defined(__DragonFly__)
static int
-test_dir(char buf[PATH_MAX], char ret[PATH_MAX],
- const char *dir, const char *bin)
-{
+test_dir(char ret[PATH_MAX], const char *dir, const char *bin)
+{
struct stat sb;
+ char fullpath[PATH_MAX];
- snprintf(buf, PATH_MAX, "%s/%s", dir, bin);
- if (realpath(buf, ret) == NULL)
- return (1);
- if (stat(buf, &sb) != 0)
- return (1);
+ snprintf(fullpath, PATH_MAX, "%s/%s", dir, bin);
+ if (!realpath(fullpath, ret))
+ return 1;
+ if (stat(fullpath, &sb) != 0)
+ return 1;
- return (0);
+ return 0;
}
static char *
getprogpath(char ret[PATH_MAX], const char *bin)
{
- char *pv, *s, *t, buf[PATH_MAX];
+ char *pv, *s, *t;
/* First approach: absolute path. */
if (bin[0] == '/') {
- if (test_dir(buf, ret, "/", bin) == 0)
- return (ret);
- return (NULL);
+ if (test_dir(ret, "/", bin) == 0)
+ return ret;
+ return nullptr;
}
/* Second approach: relative path. */
- if (strchr(bin, '/') != NULL) {
- if (getcwd(buf, PATH_MAX) == NULL)
- return (NULL);
- if (test_dir(buf, ret, buf, bin) == 0)
- return (ret);
- return (NULL);
+ if (strchr(bin, '/')) {
+ char cwd[PATH_MAX];
+ if (!getcwd(cwd, PATH_MAX))
+ return nullptr;
+ if (test_dir(ret, cwd, bin) == 0)
+ 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 (test_dir(buf, ret, t, bin) == 0) {
+ 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__
return link_path;
}
#elif defined(__FreeBSD__) || defined (__NetBSD__) || defined(__Bitrig__) || \
- defined(__OpenBSD__) || defined(__minix) || defined(__FreeBSD_kernel__)
+ defined(__OpenBSD__) || defined(__minix) || defined(__DragonFly__) || \
+ defined(__FreeBSD_kernel__)
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)
// Use dladdr to get executable path if available.
return Ret;
}
-error_code current_path(SmallVectorImpl<char> &result) {
+UniqueID file_status::getUniqueID() const {
+ return UniqueID(fs_st_dev, fs_st_ino);
+}
+
+std::error_code current_path(SmallVectorImpl<char> &result) {
+ result.clear();
+
+ const char *pwd = ::getenv("PWD");
+ llvm::sys::fs::file_status PWDStatus, DotStatus;
+ if (pwd && llvm::sys::path::is_absolute(pwd) &&
+ !llvm::sys::fs::status(pwd, PWDStatus) &&
+ !llvm::sys::fs::status(".", DotStatus) &&
+ PWDStatus.getUniqueID() == DotStatus.getUniqueID()) {
+ result.append(pwd, pwd + strlen(pwd));
+ return std::error_code();
+ }
+
#ifdef MAXPATHLEN
result.reserve(MAXPATHLEN);
#else
#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 copy_file(const Twine &from, const Twine &to, copy_option copt) {
- // Get arguments.
- SmallString<128> from_storage;
- SmallString<128> to_storage;
- StringRef f = from.toNullTerminatedStringRef(from_storage);
- StringRef t = to.toNullTerminatedStringRef(to_storage);
-
- const size_t buf_sz = 32768;
- char buffer[buf_sz];
- int from_file = -1, to_file = -1;
-
- // Open from.
- if ((from_file = ::open(f.begin(), O_RDONLY)) < 0)
- return error_code(errno, system_category());
- AutoFD from_fd(from_file);
-
- // Stat from.
- struct stat from_stat;
- if (::stat(f.begin(), &from_stat) != 0)
- return error_code(errno, system_category());
-
- // Setup to flags.
- int to_flags = O_CREAT | O_WRONLY;
- if (copt == copy_option::fail_if_exists)
- to_flags |= O_EXCL;
-
- // Open to.
- if ((to_file = ::open(t.begin(), to_flags, from_stat.st_mode)) < 0)
- return error_code(errno, system_category());
- AutoFD to_fd(to_file);
-
- // Copy!
- ssize_t sz, sz_read = 1, sz_write;
- while (sz_read > 0 &&
- (sz_read = ::read(from_fd, buffer, buf_sz)) > 0) {
- // Allow for partial writes - see Advanced Unix Programming (2nd Ed.),
- // Marc Rochkind, Addison-Wesley, 2004, page 94
- sz_write = 0;
- do {
- if ((sz = ::write(to_fd, buffer + sz_write, sz_read - sz_write)) < 0) {
- sz_read = sz; // cause read loop termination.
- break; // error.
- }
- sz_write += sz;
- } while (sz_write < sz_read);
- }
-
- // After all the file operations above the return value of close actually
- // matters.
- if (::close(from_fd.take()) < 0) sz_read = -1;
- if (::close(to_fd.take()) < 0) sz_read = -1;
-
- // Check for errors.
- if (sz_read < 0)
- return error_code(errno, system_category());
-
- return error_code::success();
-}
-
-error_code create_directory(const Twine &path, bool &existed) {
+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(), S_IRWXU | S_IRWXG) == -1) {
- if (errno != errc::file_exists)
- return error_code(errno, system_category());
- existed = true;
- } else
- existed = false;
-
- return error_code::success();
-}
-
-error_code create_hard_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 (::link(t.begin(), f.begin()) == -1)
- return error_code(errno, system_category());
+ 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();
}
-error_code create_symlink(const Twine &to, const Twine &from) {
+// 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 t = to.toNullTerminatedStringRef(to_storage);
if (::symlink(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 &existed) {
+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)
- return error_code(errno, system_category());
- existed = false;
- 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)
- return error_code(errno, system_category());
- existed = false;
- } else
- existed = true;
+ if (errno != ENOENT || !IgnoreNonExisting)
+ return std::error_code(errno, std::generic_category());
+ }
- return error_code::success();
+ return std::error_code();
}
-error_code rename(const Twine &from, const Twine &to) {
+std::error_code rename(const Twine &from, const Twine &to) {
// Get arguments.
SmallString<128> from_storage;
SmallString<128> to_storage;
StringRef f = from.toNullTerminatedStringRef(from_storage);
StringRef t = to.toNullTerminatedStringRef(to_storage);
- if (::rename(f.begin(), t.begin()) == -1) {
- // If it's a cross device link, copy then delete, otherwise return the error
- if (errno == EXDEV) {
- if (error_code ec = copy_file(from, to, copy_option::overwrite_if_exists))
- return ec;
- bool Existed;
- if (error_code ec = remove(from, Existed))
- return ec;
- } else
- return error_code(errno, system_category());
- }
+ if (::rename(f.begin(), t.begin()) == -1)
+ 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());
+std::error_code resize_file(int FD, uint64_t Size) {
+ if (::ftruncate(FD, Size) == -1)
+ return std::error_code(errno, std::generic_category());
- return error_code::success();
+ return std::error_code();
}
-error_code exists(const Twine &path, bool &result) {
- SmallString<128> path_storage;
- StringRef p = path.toNullTerminatedStringRef(path_storage);
-
- 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;
-
- return error_code::success();
+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");
}
-bool can_write(const Twine &Path) {
+std::error_code access(const Twine &Path, AccessMode Mode) {
SmallString<128> PathStorage;
StringRef P = Path.toNullTerminatedStringRef(PathStorage);
- return 0 == access(P.begin(), W_OK);
+
+ if (::access(P.begin(), convertAccessMode(Mode)) == -1)
+ return std::error_code(errno, std::generic_category());
+
+ 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;
+ }
+
+ 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();
}
-error_code getUniqueID(const Twine Path, uint64_t &Result) {
- SmallString<128> Storage;
- StringRef P = Path.toNullTerminatedStringRef(Storage);
-
- struct stat Status;
- if (::stat(P.begin(), &Status) != 0)
- return error_code(errno, system_category());
-
- Result = Status.st_ino;
- return error_code::success();
-}
-
-error_code status(const Twine &path, file_status &result) {
- SmallString<128> path_storage;
- StringRef p = path.toNullTerminatedStringRef(path_storage);
-
- struct stat status;
- if (::stat(p.begin(), &status) != 0) {
- error_code ec(errno, system_category());
+static std::error_code fillStatus(int StatRet, const struct stat &Status,
+ file_status &Result) {
+ if (StatRet != 0) {
+ std::error_code ec(errno, std::generic_category());
if (ec == errc::no_such_file_or_directory)
- result = file_status(file_type::file_not_found);
+ Result = file_status(file_type::file_not_found);
else
- result = file_status(file_type::status_error);
+ Result = file_status(file_type::status_error);
return ec;
}
- perms prms = static_cast<perms>(status.st_mode);
file_type Type = file_type::type_unknown;
- if (S_ISDIR(status.st_mode))
+ if (S_ISDIR(Status.st_mode))
Type = file_type::directory_file;
- else if (S_ISREG(status.st_mode))
+ else if (S_ISREG(Status.st_mode))
Type = file_type::regular_file;
- else if (S_ISBLK(status.st_mode))
+ else if (S_ISBLK(Status.st_mode))
Type = file_type::block_file;
- else if (S_ISCHR(status.st_mode))
+ else if (S_ISCHR(Status.st_mode))
Type = file_type::character_file;
- else if (S_ISFIFO(status.st_mode))
+ else if (S_ISFIFO(Status.st_mode))
Type = file_type::fifo_file;
- else if (S_ISSOCK(status.st_mode))
+ else if (S_ISSOCK(Status.st_mode))
Type = file_type::socket_file;
- result =
- file_status(Type, prms, 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);
+ Result =
+ file_status(Type, Perms, Status.st_dev, Status.st_ino, Status.st_mtime,
+ Status.st_uid, Status.st_gid, Status.st_size);
- return error_code::success();
+ return std::error_code();
}
-error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
+std::error_code status(const Twine &Path, file_status &Result) {
+ SmallString<128> PathStorage;
+ StringRef P = Path.toNullTerminatedStringRef(PathStorage);
+
+ struct stat Status;
+ int StatRet = ::stat(P.begin(), &Status);
+ return fillStatus(StatRet, Status, Result);
+}
+
+std::error_code status(int FD, file_status &Result) {
+ struct stat Status;
+ int StatRet = ::fstat(FD, &Status);
+ return fillStatus(StatRet, Status, Result);
+}
+
+std::error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
#if defined(HAVE_FUTIMENS)
timespec Times[2];
- Times[0].tv_sec = Time.toPosixTime();
+ Times[0].tv_sec = Time.toEpochTime();
Times[0].tv_nsec = 0;
Times[1] = Times[0];
if (::futimens(FD, Times))
+ return std::error_code(errno, std::generic_category());
+ return std::error_code();
#elif defined(HAVE_FUTIMES)
timeval Times[2];
- Times[0].tv_sec = Time.toPosixTime();
+ Times[0].tv_sec = Time.toEpochTime();
Times[0].tv_usec = 0;
Times[1] = Times[0];
if (::futimes(FD, Times))
+ return std::error_code(errno, std::generic_category());
+ return std::error_code();
#else
-#error Missing futimes() and futimens()
+#warning Missing futimes() and futimens()
+ return make_error_code(errc::function_not_supported);
#endif
- return error_code(errno, system_category());
- return error_code::success();
-}
-
-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;
-#endif
- Mapping = ::mmap(0, Size, prot, flags, FD, Offset);
+ Mapping = ::mmap(nullptr, 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;
- }
+ return std::error_code(errno, std::generic_category());
+ return std::error_code();
+}
- 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() {
+mapped_file_region::mapped_file_region(int fd, mapmode mode, uint64_t length,
+ uint64_t offset, std::error_code &ec)
+ : 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;
}
- ec = init(fd, closefd, offset);
+ 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 {
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,
+std::error_code detail::directory_iterator_construct(detail::DirIterState &it,
StringRef path){
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.
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) {
+ 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, NAMLEN(cur_dir));
if ((name.size() == 1 && name[0] == '.') ||
(name.size() == 2 && name[0] == '.' && name[1] == '.'))
} 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::error_code openFileForRead(const Twine &Name, int &ResultFD) {
+ SmallString<128> Storage;
+ StringRef P = Name.toNullTerminatedStringRef(Storage);
+ while ((ResultFD = open(P.begin(), O_RDONLY)) < 0) {
+ if (errno != EINTR)
+ return std::error_code(errno, std::generic_category());
+ }
+ return std::error_code();
+}
+
+std::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;
+
+ if (Flags & F_RW)
+ OpenFlags |= O_RDWR;
+ else
+ OpenFlags |= O_WRONLY;
+
+ if (Flags & F_Append)
+ OpenFlags |= O_APPEND;
+ else
+ OpenFlags |= O_TRUNC;
+
+ if (Flags & F_Excl)
+ OpenFlags |= O_EXCL;
+
+ SmallString<128> Storage;
+ StringRef P = Name.toNullTerminatedStringRef(Storage);
+ while ((ResultFD = open(P.begin(), OpenFlags, Mode)) < 0) {
+ if (errno != EINTR)
+ return std::error_code(errno, std::generic_category());
+ }
+ 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));
+ return true;
+ }
+
+ return false;
+}
+
+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 XDS_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 *XdsCacheDir = std::getenv("XDS_CACHE_HOME")) {
+ Result.clear();
+ Result.append(XdsCacheDir, XdsCacheDir + strlen(XdsCacheDir));
+ 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;
}
- std::fclose(file);
- result.set_size(size);
- return error_code::success();
+
+ return false;
}
-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;
-#endif
- result = ::mmap(0, size, prot, flags, fd, file_offset);
- if (result == MAP_FAILED) {
- return error_code(errno, system_category());
+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 error_code::success();
+
+ return nullptr;
}
-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();
+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 fs
} // end namespace sys
} // end namespace llvm
projects / oota-llvm.git / blobdiff