Differences From Artifact [1a4b2549c4]:

• Executable file win/tclWinFile.c — part of check-in [0bce348e6b] at 2018-03-22 16:22:04 on branch fix-1613456fff — win: fixes check of file permissions (readable, writable, executable) - more faster and stable solution without direct check of security permissions by optimal terms; additionally corrected executable extensions (missing .ps1/.cmd) in useWide case. (user: sebres size: 87657)

To Artifact [91cfdf68ad]:

• Executable file win/tclWinFile.c — part of check-in [a43aede88c] at 2018-03-22 17:45:32 on branch fix-1613456fff — minor fix on comment (restored getFileSecurityProc back, because getNamedSecurityInfoProc not used) (user: sebres size: 87652) [more...]

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    if (!(attr & FILE_ATTRIBUTE_DIRECTORY)) {
	/*
	 * If the attributes say this is not writable at all.  The file is a
	 * regular file (i.e., not a directory), then the file is not
	 * writable, full stop.	 For directories, the read-only bit is
	 * (mostly) ignored by Windows, so we can't ascertain anything about
	 * directory access from the attrib data.  However, if we have the
	 * advanced 'getNamedSecurityInfoProc', then more robust ACL checks
	 * advanced 'getFileSecurityProc', then more robust ACL checks
	 * will be done below.
	 */
	if ((mode & W_OK) && (attr & FILE_ATTRIBUTE_READONLY)) {
	    Tcl_SetErrno(EACCES);
	    return -1;
	}