//===----------------------------------------------------------------------===//
#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>
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")) ||
+static error_code TempDir(SmallVectorImpl<char> &result) {
+ // FIXME: Don't use TMPDIR if program is SUID or SGID enabled.
+ const char *dir = nullptr;
+ (dir = std::getenv("TMPDIR")) || (dir = std::getenv("TMP")) ||
+ (dir = std::getenv("TEMP")) || (dir = std::getenv("TEMPDIR")) ||
#ifdef P_tmpdir
- (dir = 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);
- }
- }
+ (dir = "/tmp");
- // 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");
+ result.clear();
+ StringRef d(dir);
+ result.append(d.begin(), d.end());
+ return error_code();
}
namespace llvm {
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)
+ snprintf(fullpath, PATH_MAX, "%s/%s", dir, bin);
+ if (realpath(fullpath, ret) == NULL)
return (1);
- if (stat(buf, &sb) != 0)
+ if (stat(fullpath, &sb) != 0)
return (1);
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)
+ if (test_dir(ret, "/", bin) == 0)
return (ret);
return (NULL);
}
/* Second approach: relative path. */
if (strchr(bin, '/') != NULL) {
- if (getcwd(buf, PATH_MAX) == NULL)
+ char cwd[PATH_MAX];
+ if (getcwd(cwd, PATH_MAX) == NULL)
return (NULL);
- if (test_dir(buf, ret, buf, bin) == 0)
+ if (test_dir(ret, cwd, bin) == 0)
return (ret);
return (NULL);
}
if (pv == NULL)
return (NULL);
while ((t = strsep(&s, ":")) != NULL) {
- if (test_dir(buf, ret, t, bin) == 0) {
+ if (test_dir(ret, t, bin) == 0) {
free(pv);
return (ret);
}
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)
return Ret;
}
+UniqueID file_status::getUniqueID() const {
+ return UniqueID(fs_st_dev, fs_st_ino);
+}
+
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 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 error_code(errno, 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();
-}
-
-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();
+ return error_code();
}
-error_code create_directory(const Twine &path, bool &existed) {
+error_code create_directory(const Twine &path, bool IgnoreExisting) {
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;
+ if (errno != EEXIST || !IgnoreExisting)
+ return error_code(errno, generic_category());
+ }
- return error_code::success();
+ return error_code();
}
-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());
-
- return error_code::success();
+error_code normalize_separators(SmallVectorImpl<char> &Path) {
+ for (auto PI = Path.begin(), PE = Path.end(); PI < PE; ++PI) {
+ if (*PI == '\\') {
+ auto PN = PI + 1;
+ if (PN < PE && *PN == '\\')
+ ++PI; // increment once, the for loop will move over the escaped slash
+ else
+ *PI = '/';
+ }
+ }
+ return 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).
+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 error_code(errno, generic_category());
- return error_code::success();
+ return error_code();
}
-error_code remove(const Twine &path, bool &existed) {
+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 error_code(errno, generic_category());
+ return 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))
- return make_error_code(errc::operation_not_permitted);
+ if (!S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode) && !S_ISLNK(buf.st_mode))
+ return make_error_code(std::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 error_code(errno, generic_category());
+ }
- return error_code::success();
+ return error_code();
}
error_code rename(const Twine &from, const Twine &to) {
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 error_code(errno, generic_category());
- return error_code::success();
+ return error_code();
}
error_code resize_file(const Twine &path, uint64_t size) {
StringRef p = path.toNullTerminatedStringRef(path_storage);
if (::truncate(p.begin(), size) == -1)
- return error_code(errno, system_category());
+ return error_code(errno, generic_category());
- return error_code::success();
+ return error_code();
}
error_code exists(const Twine &path, bool &result) {
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());
+ if (errno != ENOENT)
+ return error_code(errno, generic_category());
result = false;
} else
result = true;
- return error_code::success();
+ return error_code();
}
bool can_write(const Twine &Path) {
if (error_code ec = status(A, fsA)) return ec;
if (error_code ec = status(B, fsB)) return ec;
result = equivalent(fsA, fsB);
- return error_code::success();
+ return error_code();
}
-error_code file_size(const Twine &path, uint64_t &result) {
- SmallString<128> path_storage;
- StringRef p = path.toNullTerminatedStringRef(path_storage);
-
- struct stat status;
- if (::stat(p.begin(), &status) == -1)
- return error_code(errno, system_category());
- if (!S_ISREG(status.st_mode))
- return make_error_code(errc::operation_not_permitted);
-
- result = status.st_size;
- return error_code::success();
-}
-
-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());
- if (ec == errc::no_such_file_or_directory)
- result = file_status(file_type::file_not_found);
+static error_code fillStatus(int StatRet, const struct stat &Status,
+ file_status &Result) {
+ if (StatRet != 0) {
+ error_code ec(errno, generic_category());
+ if (ec == std::errc::no_such_file_or_directory)
+ 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 & perms_mask);
-
- if (S_ISDIR(status.st_mode))
- result = file_status(file_type::directory_file, prms);
- else if (S_ISREG(status.st_mode))
- result = file_status(file_type::regular_file, prms);
- else if (S_ISBLK(status.st_mode))
- result = file_status(file_type::block_file, prms);
- else if (S_ISCHR(status.st_mode))
- result = file_status(file_type::character_file, prms);
- else if (S_ISFIFO(status.st_mode))
- result = file_status(file_type::fifo_file, prms);
- else if (S_ISSOCK(status.st_mode))
- result = file_status(file_type::socket_file, prms);
- else
- result = file_status(file_type::type_unknown, prms);
+ file_type Type = file_type::type_unknown;
- result.fs_st_dev = status.st_dev;
- result.fs_st_ino = status.st_ino;
- result.fs_st_mtime = status.st_mtime;
- result.fs_st_uid = status.st_uid;
- result.fs_st_gid = status.st_gid;
+ if (S_ISDIR(Status.st_mode))
+ Type = file_type::directory_file;
+ else if (S_ISREG(Status.st_mode))
+ Type = file_type::regular_file;
+ else if (S_ISBLK(Status.st_mode))
+ Type = file_type::block_file;
+ else if (S_ISCHR(Status.st_mode))
+ Type = file_type::character_file;
+ else if (S_ISFIFO(Status.st_mode))
+ Type = file_type::fifo_file;
+ else if (S_ISSOCK(Status.st_mode))
+ Type = file_type::socket_file;
- return error_code::success();
+ 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();
}
-// Modifies permissions on a file.
-error_code permissions(const Twine &path, perms prms) {
- if ((prms & add_perms) && (prms & remove_perms))
- llvm_unreachable("add_perms and remove_perms are mutually exclusive");
+error_code status(const Twine &Path, file_status &Result) {
+ SmallString<128> PathStorage;
+ StringRef P = Path.toNullTerminatedStringRef(PathStorage);
- // Get current permissions
- // FIXME: We only need this stat for add_perms and remove_perms.
- file_status info;
- if (error_code ec = status(path, info)) {
- return ec;
- }
-
- // Set updated permissions.
- SmallString<128> path_storage;
- StringRef p = path.toNullTerminatedStringRef(path_storage);
- perms permsToSet;
- if (prms & add_perms) {
- permsToSet = (info.permissions() | prms) & perms_mask;
- } else if (prms & remove_perms) {
- permsToSet = (info.permissions() & ~prms) & perms_mask;
- } else {
- permsToSet = prms & perms_mask;
- }
- if (::chmod(p.begin(), static_cast<mode_t>(permsToSet))) {
- return error_code(errno, system_category());
- }
+ struct stat Status;
+ int StatRet = ::stat(P.begin(), &Status);
+ return fillStatus(StatRet, Status, Result);
+}
- return error_code::success();
+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) {
-#if HAVE_FUTIMENS
+#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))
-#elif HAVE_FUTIMES
+ return error_code(errno, generic_category());
+ return 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 error_code(errno, generic_category());
+ return error_code();
#else
-#error Missing futimes() and futimens()
+#warning Missing futimes() and futimens()
+ return make_error_code(std::errc::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) {
// Figure out how large the file is.
struct stat FileInfo;
if (fstat(FD, &FileInfo) == -1)
- return error_code(errno, system_category());
+ return error_code(errno, generic_category());
uint64_t FileSize = FileInfo.st_size;
if (Size == 0)
else if (FileSize < Size) {
// We need to grow the file.
if (ftruncate(FD, Size) == -1)
- return error_code(errno, system_category());
+ return error_code(errno, generic_category());
}
int flags = (Mode == readwrite) ? MAP_SHARED : MAP_PRIVATE;
#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();
+ return error_code(errno, generic_category());
+ return error_code();
}
mapped_file_region::mapped_file_region(const Twine &path,
, 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);
+ ec = make_error_code(std::errc::invalid_argument);
return;
}
int oflags = (mode == readonly) ? O_RDONLY : O_RDWR;
int ofd = ::open(name.begin(), oflags);
if (ofd == -1) {
- ec = error_code(errno, system_category());
+ ec = error_code(errno, generic_category());
return;
}
ec = init(ofd, true, offset);
if (ec)
- Mapping = 0;
+ Mapping = nullptr;
}
mapped_file_region::mapped_file_region(int fd,
, 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);
+ ec = make_error_code(std::errc::invalid_argument);
return;
}
ec = init(fd, closefd, offset);
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;
+ other.Mapping = nullptr;
}
-#endif
mapped_file_region::mapmode mapped_file_region::flags() const {
assert(Mapping && "Mapping failed but used anyway!");
char *mapped_file_region::data() const {
assert(Mapping && "Mapping failed but used anyway!");
- assert(Mode != readonly && "Cannot get non const data for readonly mapping!");
+ assert(Mode != readonly && "Cannot get non-const data for readonly mapping!");
return reinterpret_cast<char*>(Mapping);
}
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 error_code(errno, generic_category());
it.IterationHandle = reinterpret_cast<intptr_t>(directory);
// Add something for replace_filename to replace.
::closedir(reinterpret_cast<DIR *>(it.IterationHandle));
it.IterationHandle = 0;
it.CurrentEntry = directory_entry();
- return error_code::success();
+ return error_code();
}
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 error_code(errno, 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 error_code();
}
error_code get_magic(const Twine &path, uint32_t len,
// Open path.
std::FILE *file = std::fopen(Path.data(), "rb");
- if (file == 0)
- return error_code(errno, system_category());
+ if (!file)
+ return error_code(errno, generic_category());
// Reserve storage.
result.reserve(len);
size_t size = std::fread(result.data(), 1, len, file);
if (std::ferror(file) != 0) {
std::fclose(file);
- return error_code(errno, system_category());
+ return error_code(errno, generic_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);
+ return make_error_code(std::errc::value_too_large);
}
}
std::fclose(file);
result.set_size(size);
- return error_code::success();
+ return error_code();
}
-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());
+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 error_code(errno, generic_category());
}
-
- return error_code::success();
+ return error_code();
}
-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();
-}
+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 error_code(errno, generic_category());
+ }
+ return 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;
+}
+
+} // end namespace path
+
} // end namespace sys
} // end namespace llvm
projects / oota-llvm.git / blobdiff