diff options
Diffstat (limited to 'src/os_mswin.c')
| -rw-r--r-- | src/os_mswin.c | 145 |
1 files changed, 80 insertions, 65 deletions
diff --git a/src/os_mswin.c b/src/os_mswin.c index 512fa40896..149883b41e 100644 --- a/src/os_mswin.c +++ b/src/os_mswin.c @@ -430,16 +430,6 @@ slash_adjust(char_u *p) } } -// Use 64-bit stat functions. -#undef stat -#undef _stat -#undef _wstat -#undef _fstat -#define stat _stat64 -#define _stat _stat64 -#define _wstat _wstat64 -#define _fstat _fstat64 - static int read_reparse_point(const WCHAR *name, char_u *buf, DWORD *buf_len) { @@ -461,58 +451,6 @@ read_reparse_point(const WCHAR *name, char_u *buf, DWORD *buf_len) return ok ? OK : FAIL; } - static int -wstat_symlink_aware(const WCHAR *name, stat_T *stp) -{ -#if (defined(_MSC_VER) && (_MSC_VER < 1900)) || defined(__MINGW32__) - // Work around for VC12 or earlier (and MinGW). _wstat() can't handle - // symlinks properly. - // VC9 or earlier: _wstat() doesn't support a symlink at all. It retrieves - // status of a symlink itself. - // VC10: _wstat() supports a symlink to a normal file, but it doesn't - // support a symlink to a directory (always returns an error). - // VC11 and VC12: _wstat() doesn't return an error for a symlink to a - // directory, but it doesn't set S_IFDIR flag. - // MinGW: Same as VC9. - int n; - BOOL is_symlink = FALSE; - HANDLE hFind, h; - DWORD attr = 0; - WIN32_FIND_DATAW findDataW; - - hFind = FindFirstFileW(name, &findDataW); - if (hFind != INVALID_HANDLE_VALUE) - { - attr = findDataW.dwFileAttributes; - if ((attr & FILE_ATTRIBUTE_REPARSE_POINT) - && (findDataW.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) - is_symlink = TRUE; - FindClose(hFind); - } - if (is_symlink) - { - h = CreateFileW(name, FILE_READ_ATTRIBUTES, - FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, - OPEN_EXISTING, - (attr & FILE_ATTRIBUTE_DIRECTORY) - ? FILE_FLAG_BACKUP_SEMANTICS : 0, - NULL); - if (h != INVALID_HANDLE_VALUE) - { - int fd; - - fd = _open_osfhandle((intptr_t)h, _O_RDONLY); - n = _fstat(fd, (struct _stat *)stp); - if ((n == 0) && (attr & FILE_ATTRIBUTE_DIRECTORY)) - stp->st_mode = (stp->st_mode & ~S_IFREG) | S_IFDIR; - _close(fd); - return n; - } - } -#endif - return _wstat(name, (struct _stat *)stp); -} - char_u * resolve_appexeclink(char_u *fname) { @@ -568,11 +506,76 @@ resolve_appexeclink(char_u *fname) return utf16_to_enc(p, NULL); } +// Use 64-bit stat functions. +#undef stat +#undef _stat +#undef _wstat +#undef _fstat +#define stat _stat64 +#define _stat _stat64 +#define _wstat _wstat64 +#define _fstat _fstat64 + +/* + * Implements lstat() and stat() that can handle symlinks properly. + */ + static int +mswin_stat_impl(const WCHAR *name, stat_T *stp, const int resolve) +{ + int n; + int fd; + BOOL is_symlink = FALSE; + HANDLE hFind, h; + DWORD attr = 0; + DWORD flag = 0; + WIN32_FIND_DATAW findDataW; + +#ifdef _UCRT + if (resolve) + // Universal CRT can handle symlinks properly. + return _wstat(name, stp); +#endif + + hFind = FindFirstFileW(name, &findDataW); + if (hFind != INVALID_HANDLE_VALUE) + { + attr = findDataW.dwFileAttributes; + if ((attr & FILE_ATTRIBUTE_REPARSE_POINT) + && (findDataW.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) + is_symlink = TRUE; + FindClose(hFind); + } + + // Use the plain old stat() whenever it's possible. + if (!is_symlink) + return _wstat(name, stp); + + if (!resolve && is_symlink) + flag = FILE_FLAG_OPEN_REPARSE_POINT; + if (attr & FILE_ATTRIBUTE_DIRECTORY) + flag |= FILE_FLAG_BACKUP_SEMANTICS; + + h = CreateFileW(name, FILE_READ_ATTRIBUTES, + FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, flag, + NULL); + if (h == INVALID_HANDLE_VALUE) + return -1; + + fd = _open_osfhandle((intptr_t)h, _O_RDONLY); + n = _fstat(fd, (struct _stat *)stp); + if ((n == 0) && (attr & FILE_ATTRIBUTE_DIRECTORY)) + stp->st_mode = (stp->st_mode & ~S_IFMT) | S_IFDIR; + _close(fd); + + return n; +} + /* * stat() can't handle a trailing '/' or '\', remove it first. + * When 'resolve' is true behave as lstat() wrt symlinks. */ - int -vim_stat(const char *name, stat_T *stp) + static int +stat_impl(const char *name, stat_T *stp, const int resolve) { // WinNT and later can use _MAX_PATH wide characters for a pathname, which // means that the maximum pathname is _MAX_PATH * 3 bytes when 'enc' is @@ -607,11 +610,23 @@ vim_stat(const char *name, stat_T *stp) if (wp == NULL) return -1; - n = wstat_symlink_aware(wp, stp); + n = mswin_stat_impl(wp, stp, resolve); vim_free(wp); return n; } + int +vim_lstat(const char *name, stat_T *stp) +{ + return stat_impl(name, stp, FALSE); +} + + int +vim_stat(const char *name, stat_T *stp) +{ + return stat_impl(name, stp, TRUE); +} + #if (defined(FEAT_GUI_MSWIN) && !defined(VIMDLL)) || defined(PROTO) void mch_settmode(tmode_T tmode UNUSED) |