Mercurial > octave
view liboctave/system/lo-sysdep.cc @ 32086:3c608abd55f5
Move "same_file" from liboctinterp to liboctave (bug #63803).
* libinterp/corefcn/utils.cc, utils.h (same_file): Deprecate function.
* libinterp/corefcn/sysdep.cc, sysdep.h (same_file_internal): Remove function.
* liboctave/system/lo-sysdep.cc, lo-sysdep.h (same_file): Move function from
liboctinterp to liboctave.
* libgui/src/m-editor/file-editor.cc (file_editor::find_tab_widget),
libinterp/corefcn/fcn-info.cc (file_editor::find_tab_widget),
libinterp/corefcn/interpreter.cc (interpreter::execute_startup_files),
libinterp/corefcn/load-path.cc (load_path::append): Use function in updated
namespace.
author | Markus Mützel <markus.muetzel@gmx.de> |
---|---|
date | Sat, 06 May 2023 17:48:27 +0200 |
parents | ed3a18fe328a |
children | 85255746fc21 |
line wrap: on
line source
//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1996-2023 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // This file is part of Octave. // // Octave is free software: you can redistribute it and/or modify it // under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Octave is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Octave; see the file COPYING. If not, see // <https://www.gnu.org/licenses/>. // //////////////////////////////////////////////////////////////////////// #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <cstdlib> #include <locale> #include <codecvt> #include "dir-ops.h" #include "file-ops.h" #include "file-stat.h" #include "lo-error.h" #include "lo-sysdep.h" #include "localcharset-wrapper.h" #include "putenv-wrapper.h" #include "unistd-wrappers.h" #include "unsetenv-wrapper.h" #if defined (OCTAVE_USE_WINDOWS_API) # include <windows.h> # include <wchar.h> # include "filepos-wrappers.h" # include "lo-hash.h" # include "oct-locbuf.h" # include "uniconv-wrappers.h" # include "unwind-prot.h" #endif OCTAVE_BEGIN_NAMESPACE(octave) OCTAVE_BEGIN_NAMESPACE(sys) int system (const std::string& cmd_str) { #if defined (OCTAVE_USE_WINDOWS_API) const std::wstring wcmd_str = u8_to_wstring (cmd_str); return _wsystem (wcmd_str.c_str ()); #else return ::system (cmd_str.c_str ()); #endif } std::string getcwd () { std::string retval; #if defined (OCTAVE_USE_WINDOWS_API) wchar_t *tmp = _wgetcwd (nullptr, 0); if (! tmp) (*current_liboctave_error_handler) ("unable to find current directory"); std::wstring tmp_wstr (tmp); free (tmp); std::string tmp_str = u8_from_wstring (tmp_wstr); retval = tmp_str; #else // Using octave_getcwd_wrapper ensures that we have a getcwd that // will allocate a buffer as large as necessary if buf and size are // both 0. char *tmp = octave_getcwd_wrapper (nullptr, 0); if (! tmp) (*current_liboctave_error_handler) ("unable to find current directory"); retval = tmp; free (tmp); #endif return retval; } int chdir (const std::string& path_arg) { std::string path = sys::file_ops::tilde_expand (path_arg); #if defined (OCTAVE_USE_WINDOWS_API) if (path.length () == 2 && path[1] == ':') path += '\\'; #endif return octave_chdir_wrapper (path.c_str ()); } bool get_dirlist (const std::string& dirname, string_vector& dirlist, std::string& msg) { dirlist = ""; msg = ""; #if defined (OCTAVE_USE_WINDOWS_API) _WIN32_FIND_DATAW ffd; std::string path_name (dirname); if (path_name.empty ()) return true; if (path_name.back () == '\\' || path_name.back () == '/') path_name.push_back ('*'); else path_name.append (R"(\*)"); // Find first file in directory. std::wstring wpath_name = u8_to_wstring (path_name); HANDLE hFind = FindFirstFileW (wpath_name.c_str (), &ffd); if (INVALID_HANDLE_VALUE == hFind) { DWORD errCode = GetLastError (); char *errorText = nullptr; FormatMessageA (FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS, nullptr, errCode, MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT), reinterpret_cast <char *> (&errorText), 0, nullptr); if (errorText != nullptr) { msg = std::string (errorText); LocalFree (errorText); } return false; } std::list<std::string> dirlist_str; do dirlist_str.push_back (u8_from_wstring (ffd.cFileName)); while (FindNextFileW (hFind, &ffd) != 0); FindClose(hFind); dirlist = string_vector (dirlist_str); #else dir_entry dir (dirname); if (! dir) { msg = dir.error (); return false; } dirlist = dir.read (); dir.close (); #endif return true; } #if defined (OCTAVE_USE_WINDOWS_API) static bool check_fseek_ftell_workaround_needed (bool set_nonbuffered_mode) { // To check whether the workaround is needed: // // * Create a tmp file with LF line endings only. // // * Open that file for reading in text mode. // // * Read a line. // // * Use ftello to record the position of the beginning of the // second line. // // * Read and save the contents of the second line. // // * Use fseeko to return to the saved position. // // * Read the second line again and compare to the previously // saved text. // // * If the lines are different, we need to set non-buffered // input mode for files opened in text mode. std::string tmpname = sys::tempnam ("", "oct-"); if (tmpname.empty ()) { (*current_liboctave_warning_handler) ("fseek/ftell bug check failed (tmp name creation)!"); return false; } std::FILE *fptr = std::fopen (tmpname.c_str (), "wb"); if (! fptr) { (*current_liboctave_warning_handler) ("fseek/ftell bug check failed (opening tmp file for writing)!"); return false; } fprintf (fptr, "%s", "foo\nbar\nbaz\n"); std::fclose (fptr); fptr = std::fopen (tmpname.c_str (), "rt"); if (! fptr) { (*current_liboctave_warning_handler) ("fseek/ftell bug check failed (opening tmp file for reading)!"); return false; } unwind_action act ([=] () { std::fclose (fptr); sys::unlink (tmpname); }); if (set_nonbuffered_mode) ::setvbuf (fptr, nullptr, _IONBF, 0); while (true) { int c = fgetc (fptr); if (c == EOF) { (*current_liboctave_warning_handler) ("fseek/ftell bug check failed (skipping first line)!"); return false; } if (c == '\n') break; } off_t pos = octave_ftello_wrapper (fptr); char buf1[8]; int i = 0; while (true) { int c = fgetc (fptr); if (c == EOF) { (*current_liboctave_warning_handler) ("fseek/ftell bug check failed (reading second line)!"); return false; } if (c == '\n') break; buf1[i++] = static_cast<char> (c); } buf1[i] = '\0'; octave_fseeko_wrapper (fptr, pos, SEEK_SET); char buf2[8]; i = 0; while (true) { int c = fgetc (fptr); if (c == EOF) { (*current_liboctave_warning_handler) ("fseek/ftell bug check failed (reading after repositioning)!"); return false; } if (c == '\n') break; buf2[i++] = static_cast<char> (c); } buf2[i] = '\0'; return strcmp (buf1, buf2); } static std::string get_formatted_last_error () { std::string msg = ""; DWORD last_error = GetLastError (); wchar_t *error_text = nullptr; FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS, nullptr, last_error, MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT), reinterpret_cast <wchar_t *> (&error_text), 0, nullptr); if (error_text != nullptr) { msg = u8_from_wstring (error_text); LocalFree (error_text); } else msg = "Unknown error."; return msg; } #endif bool file_exists (const std::string& filename, bool is_dir) { // Check if a file with the given name exists on the file system. If is_dir // is true (the default), also return true if filename refers to a directory. #if defined (OCTAVE_USE_WINDOWS_API) std::wstring w_fn = u8_to_wstring (filename); DWORD f_attr = GetFileAttributesW (w_fn.c_str ()); return ((f_attr != INVALID_FILE_ATTRIBUTES) && (is_dir || ! (f_attr & FILE_ATTRIBUTE_DIRECTORY))); #else file_stat fs (filename); return (fs && (fs.is_reg () || (is_dir && fs.is_dir ()))); #endif } bool file_exists (const std::string& filename, bool is_dir, std::string& msg) { // Check if a file with the given name exists on the file system. If is_dir // is true (the default), also return true if filename refers to a directory. #if defined (OCTAVE_USE_WINDOWS_API) std::wstring w_fn = u8_to_wstring (filename); DWORD f_attr = GetFileAttributesW (w_fn.c_str ()); if (f_attr == INVALID_FILE_ATTRIBUTES) msg = get_formatted_last_error (); return ((f_attr != INVALID_FILE_ATTRIBUTES) && (is_dir || ! (f_attr & FILE_ATTRIBUTE_DIRECTORY))); #else file_stat fs (filename); if (! fs) msg = fs.error (); return (fs && (fs.is_reg () || (is_dir && fs.is_dir ()))); #endif } bool dir_exists (const std::string& dirname) { // Check if a directory with the given name exists on the file system. #if defined (OCTAVE_USE_WINDOWS_API) std::wstring w_dn = u8_to_wstring (dirname); DWORD f_attr = GetFileAttributesW (w_dn.c_str ()); return ((f_attr != INVALID_FILE_ATTRIBUTES) && (f_attr & FILE_ATTRIBUTE_DIRECTORY)); #else file_stat fs (dirname); return (fs && fs.is_dir ()); #endif } bool dir_exists (const std::string& dirname, std::string& msg) { // Check if a directory with the given name exists on the file system. #if defined (OCTAVE_USE_WINDOWS_API) std::wstring w_dn = u8_to_wstring (dirname); DWORD f_attr = GetFileAttributesW (w_dn.c_str ()); if (f_attr == INVALID_FILE_ATTRIBUTES) msg = get_formatted_last_error (); return ((f_attr != INVALID_FILE_ATTRIBUTES) && (f_attr & FILE_ATTRIBUTE_DIRECTORY)); #else file_stat fs (dirname); if (! fs) msg = fs.error (); return (fs && fs.is_dir ()); #endif } // Return TRUE if FILE1 and FILE2 refer to the same (physical) file. bool same_file (const std::string& file1, const std::string& file2) { #if defined (OCTAVE_USE_WINDOWS_API) // FIXME: When Octave switches to C++17, consider replacing this function // by https://en.cppreference.com/w/cpp/filesystem/equivalent. bool retval = false; std::wstring file1w = sys::u8_to_wstring (file1); std::wstring file2w = sys::u8_to_wstring (file2); const wchar_t *f1 = file1w.c_str (); const wchar_t *f2 = file2w.c_str (); bool f1_is_dir = GetFileAttributesW (f1) & FILE_ATTRIBUTE_DIRECTORY; bool f2_is_dir = GetFileAttributesW (f2) & FILE_ATTRIBUTE_DIRECTORY; // Windows native code // Reference: http://msdn2.microsoft.com/en-us/library/aa363788.aspx DWORD share = FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE; HANDLE hfile1 = CreateFileW (f1, 0, share, 0, OPEN_EXISTING, f1_is_dir ? FILE_FLAG_BACKUP_SEMANTICS : 0, 0); if (hfile1 != INVALID_HANDLE_VALUE) { HANDLE hfile2 = CreateFileW (f2, 0, share, 0, OPEN_EXISTING, f2_is_dir ? FILE_FLAG_BACKUP_SEMANTICS : 0, 0); if (hfile2 != INVALID_HANDLE_VALUE) { BY_HANDLE_FILE_INFORMATION hfi1; BY_HANDLE_FILE_INFORMATION hfi2; if (GetFileInformationByHandle (hfile1, &hfi1) && GetFileInformationByHandle (hfile2, &hfi2)) { retval = (hfi1.dwVolumeSerialNumber == hfi2.dwVolumeSerialNumber && hfi1.nFileIndexHigh == hfi2.nFileIndexHigh && hfi1.nFileIndexLow == hfi2.nFileIndexLow && hfi1.nFileSizeHigh == hfi2.nFileSizeHigh && hfi1.nFileSizeLow == hfi2.nFileSizeLow && hfi1.ftLastWriteTime.dwLowDateTime == hfi2.ftLastWriteTime.dwLowDateTime && hfi1.ftLastWriteTime.dwHighDateTime == hfi2.ftLastWriteTime.dwHighDateTime); } CloseHandle (hfile2); } CloseHandle (hfile1); } return retval; #else // POSIX Code sys::file_stat fs_file1 (file1); sys::file_stat fs_file2 (file2); return (fs_file1 && fs_file2 && fs_file1.ino () == fs_file2.ino () && fs_file1.dev () == fs_file2.dev ()); #endif } std::FILE * fopen (const std::string& filename, const std::string& mode) { #if defined (OCTAVE_USE_WINDOWS_API) std::wstring wfilename = u8_to_wstring (filename); std::wstring wmode = u8_to_wstring (mode); std::FILE *fptr = _wfopen (wfilename.c_str (), wmode.c_str ()); static bool fseek_ftell_bug_workaround_needed = false; static bool fseek_ftell_bug_checked = false; if (! fseek_ftell_bug_checked && mode.find ('t') != std::string::npos) { // FIXME: Is the following workaround needed for all files // opened in text mode, or only for files opened for reading? // Try to avoid fseek/ftell bug on Windows systems by setting // non-buffered input mode for files opened in text mode, but // only if it appears that the workaround is needed. See // Octave bug #58055. // To check whether the workaround is needed: // // * Create a tmp file with LF line endings only. // // * Open that file for reading in text mode. // // * Read a line. // // * Use ftello to record the position of the beginning of // the second line. // // * Read and save the contents of the second line. // // * Use fseeko to return to the saved position. // // * Read the second line again and compare to the // previously saved text. // // * If the lines are different, we need to set non-buffered // input mode for files opened in text mode. // // * To verify that the workaround solves the problem, // repeat the above test with non-buffered input mode. If // that fails, warn that there may be trouble with // ftell/fseek when reading files opened in text mode. if (check_fseek_ftell_workaround_needed (false)) { if (check_fseek_ftell_workaround_needed (true)) (*current_liboctave_warning_handler) ("fseek/ftell may fail for files opened in text mode"); else fseek_ftell_bug_workaround_needed = true; } fseek_ftell_bug_checked = true; } if (fseek_ftell_bug_workaround_needed && mode.find ('t') != std::string::npos) ::setvbuf (fptr, nullptr, _IONBF, 0); return fptr; #else return std::fopen (filename.c_str (), mode.c_str ()); #endif } std::FILE * fopen_tmp (const std::string& name, const std::string& mode) { #if defined (OCTAVE_USE_WINDOWS_API) // Append "D" to the mode string to indicate that this is a temporary // file that should be deleted when the last open handle is closed. std::string tmp_mode = mode + "D"; return std::fopen (name.c_str (), tmp_mode.c_str ()); #else std::FILE *fptr = std::fopen (name.c_str (), mode.c_str ()); // From gnulib: This relies on the Unix semantics that a file is not // really removed until it is closed. octave_unlink_wrapper (name.c_str ()); return fptr; #endif } std::fstream fstream (const std::string& filename, const std::ios::openmode mode) { #if defined (OCTAVE_USE_WINDOWS_API) std::wstring wfilename = u8_to_wstring (filename); return std::fstream (wfilename.c_str (), mode); #else return std::fstream (filename.c_str (), mode); #endif } std::ifstream ifstream (const std::string& filename, const std::ios::openmode mode) { #if defined (OCTAVE_USE_WINDOWS_API) std::wstring wfilename = u8_to_wstring (filename); return std::ifstream (wfilename.c_str (), mode); #else return std::ifstream (filename.c_str (), mode); #endif } std::ofstream ofstream (const std::string& filename, const std::ios::openmode mode) { #if defined (OCTAVE_USE_WINDOWS_API) std::wstring wfilename = u8_to_wstring (filename); return std::ofstream (wfilename.c_str (), mode); #else return std::ofstream (filename.c_str (), mode); #endif } void putenv_wrapper (const std::string& name, const std::string& value) { std::string new_env = name + "=" + value; // FIXME: The malloc leaks memory, but so would a call to setenv. // Short of extreme measures to track memory, altering the environment // always leaks memory, but the saving grace is that the leaks are small. // As far as I can see there's no way to distinguish between the // various errors; putenv doesn't have errno values. #if defined (OCTAVE_USE_WINDOWS_API) std::wstring new_wenv = u8_to_wstring (new_env); int len = (new_wenv.length () + 1) * sizeof (wchar_t); wchar_t *new_item = static_cast<wchar_t *> (std::malloc (len)); wcscpy (new_item, new_wenv.c_str()); if (_wputenv (new_item) < 0) (*current_liboctave_error_handler) ("putenv (%s) failed", new_env.c_str()); #else int len = new_env.length () + 1; char *new_item = static_cast<char *> (std::malloc (len)); std::strcpy (new_item, new_env.c_str()); if (octave_putenv_wrapper (new_item) < 0) (*current_liboctave_error_handler) ("putenv (%s) failed", new_item); #endif } std::string getenv_wrapper (const std::string& name) { #if defined (OCTAVE_USE_WINDOWS_API) std::wstring wname = u8_to_wstring (name); wchar_t *env = _wgetenv (wname.c_str ()); return env ? u8_from_wstring (env) : ""; #else char *env = ::getenv (name.c_str ()); return env ? env : ""; #endif } int unsetenv_wrapper (const std::string& name) { #if defined (OCTAVE_USE_WINDOWS_API) putenv_wrapper (name, ""); std::wstring wname = u8_to_wstring (name); return (SetEnvironmentVariableW (wname.c_str (), nullptr) ? 0 : -1); #else return octave_unsetenv_wrapper (name.c_str ()); #endif } std::wstring u8_to_wstring (const std::string& utf8_string) { // convert multibyte UTF-8 string to wide character string static std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> wchar_conv; std::wstring retval = L""; try { retval = wchar_conv.from_bytes (utf8_string); } catch (const std::range_error& e) { // What to do in case of error? // error ("u8_to_wstring: converting from UTF-8 to wchar_t: %s", // e.what ()); } return retval; } std::string u8_from_wstring (const std::wstring& wchar_string) { // convert wide character string to multibyte UTF-8 string static std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> wchar_conv; std::string retval = ""; try { retval = wchar_conv.to_bytes (wchar_string); } catch (const std::range_error& e) { // What to do in case of error? // error ("u8_from_wstring: converting from wchar_t to UTF-8: %s", // e.what ()); } return retval; } // At quite a few places in the code we are passing file names as // char arrays to external library functions. // When these functions try to locate the corresponding file on the // disc, they need to use the wide character API on Windows to // correctly open files with non-ASCII characters. // But they have no way of knowing which encoding we are using for // the passed string. So they have no way of reliably converting to // a wchar_t array. (I.e. there is no possible fix for these // functions with current C or C++.) // To solve the dilemma, the function "get_ASCII_filename" first // checks whether there are any non-ASCII characters in the passed // file name. If there are not, it returns the original name. // Otherwise, it optionally tries to convert the file name to the locale // charset. // If the file name contains characters that cannot be converted to the // locale charset (or that step is skipped), it tries to obtain the short // file name (8.3 naming scheme) which only consists of ASCII characters // and are safe to pass. However, short file names can be disabled for // performance reasons on the file system level with NTFS and they are not // stored on other file systems (e.g. ExFAT). So there is no guarantee // that these exist. // If short file names are not stored, a hard link to the file is // created. For this the path to the file is split at the deepest // possible level that doesn't contain non-ASCII characters. At // that level a hidden folder is created that holds the hard links. // That means we need to have write access on that location. A path // to that hard link is returned. // If the file system is FAT32, there are no hard links. But FAT32 // always stores short file names. So we are safe. // ExFAT that is occasionally used on USB sticks and SD cards stores // neither short file names nor does it support hard links. So for // exFAT with this function, there is (currently) no way to generate // a file name that is stripped from non-ASCII characters but still // is valid. // For Unixy systems, this function does nothing. std::string get_ASCII_filename (const std::string& orig_file_name, const bool allow_locale) { #if defined (OCTAVE_USE_WINDOWS_API) // Return file name that only contains ASCII characters that can // be used to access the file orig_file_name. The original file // must exist in the file system before calling this function. // This is useful for passing file names to functions that are not // aware of the character encoding we are using. // 0. Check whether filename contains non-ASCII (UTF-8) characters. std::string::const_iterator first_non_ASCII = std::find_if (orig_file_name.begin (), orig_file_name.end (), [](char c) { return (c < 0 || c >= 128); }); if (first_non_ASCII == orig_file_name.end ()) return orig_file_name; // 1. Optionally, check if all characters in the path can be successfully // converted to the locale charset if (allow_locale) { const char *locale = octave_locale_charset_wrapper (); if (locale) { const uint8_t *name_u8 = reinterpret_cast<const uint8_t *> (orig_file_name.c_str ()); std::size_t length = 0; char *name_locale = octave_u8_conv_to_encoding_strict (locale, name_u8, orig_file_name.length () + 1, &length); if (name_locale) { std::string file_name_locale (name_locale, length); free (name_locale); return file_name_locale; } } } // 2. Check if file system stores short filenames (might be ASCII-only). std::wstring w_orig_file_name_str = u8_to_wstring (orig_file_name); const wchar_t *w_orig_file_name = w_orig_file_name_str.c_str (); // Get full path to file wchar_t w_full_file_name[_MAX_PATH]; if (_wfullpath (w_full_file_name, w_orig_file_name, _MAX_PATH) == nullptr) return orig_file_name; std::wstring w_full_file_name_str = w_full_file_name; // Get short filename (8.3) from UTF-16 filename. long length = GetShortPathNameW (w_full_file_name, nullptr, 0); if (length > 0) { // Dynamically allocate the correct size (terminating null char // was included in length). OCTAVE_LOCAL_BUFFER (wchar_t, w_short_file_name, length); GetShortPathNameW (w_full_file_name, w_short_file_name, length); std::wstring w_short_file_name_str = std::wstring (w_short_file_name, length); if (w_short_file_name_str.compare (0, length-1, w_full_file_name_str) != 0) { // Check whether short file name contains non-ASCII characters std::string short_file_name = u8_from_wstring (w_short_file_name_str); first_non_ASCII = std::find_if (short_file_name.begin (), short_file_name.end (), [](char c) { return (c < 0 || c >= 128); }); if (first_non_ASCII == short_file_name.end ()) return short_file_name; } } // 3. Create hard link with only-ASCII characters. // Get longest possible part of path that only contains ASCII chars. std::wstring::iterator w_first_non_ASCII = std::find_if (w_full_file_name_str.begin (), w_full_file_name_str.end (), [](wchar_t c) { return (c < 0 || c >= 128); }); std::wstring tmp_substr = std::wstring (w_full_file_name_str.begin (), w_first_non_ASCII); std::size_t pos = tmp_substr.find_last_of (u8_to_wstring (file_ops::dir_sep_chars ())); std::string par_dir = u8_from_wstring (w_full_file_name_str.substr (0, pos+1)); // Create .oct_ascii directory. // FIXME: We need to have write permission in this location. std::string oct_ascii_dir = par_dir + ".oct_ascii"; std::string test_dir = canonicalize_file_name (oct_ascii_dir); if (test_dir.empty ()) { std::string msg; int status = sys::mkdir (oct_ascii_dir, 0777, msg); if (status < 0) return orig_file_name; // Set hidden property. SetFileAttributesA (oct_ascii_dir.c_str (), FILE_ATTRIBUTE_HIDDEN); } // Create file from hash of full filename. std::string filename_hash = (oct_ascii_dir + file_ops::dir_sep_str () + crypto::hash ("SHA1", orig_file_name)); // FIXME: This is just to check if the file exists. Use a more efficient // method. std::string abs_filename_hash = canonicalize_file_name (filename_hash); if (! abs_filename_hash.empty ()) sys::unlink (filename_hash); // At this point, we know that we have only ASCII characters. // So instead of converting, just copy the characters to std::wstring. std::wstring w_filename_hash (filename_hash.begin (), filename_hash.end ()); if (CreateHardLinkW (w_filename_hash.c_str (), w_orig_file_name, nullptr)) return filename_hash; #else octave_unused_parameter (allow_locale); #endif return orig_file_name; } OCTAVE_END_NAMESPACE(sys) OCTAVE_END_NAMESPACE(octave)