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();
-}
-
error_code create_directory(const Twine &path, bool &existed) {
SmallString<128> path_storage;
StringRef p = path.toNullTerminatedStringRef(path_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 error_code(errno, system_category());
return error_code::success();
}
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) {
+static error_code fillStatus(int StatRet, const struct stat &Status,
+ file_status &Result) {
+ if (StatRet != 0) {
error_code ec(errno, system_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);
-
- 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);
-
- 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;
- result.fs_st_size = status.st_size;
+ file_type Type = file_type::type_unknown;
+
+ 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;
+
+ 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();
}
+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);
+}
+
+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 defined(HAVE_FUTIMENS)
timespec Times[2];
return error_code::success();
}
+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, 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_WRONLY | O_CREAT;
+
+ 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, system_category());
+ }
+ return error_code::success();
+}
} // end namespace fs
} // end namespace sys
projects / oota-llvm.git / blobdiff