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Paul Eggert authored
* doc/lispref/files.texi (File Attributes): Document file-attributes atomicity. * etc/NEWS: Document the fix. * src/dired.c (file_attributes): New args DIRNAME and FILENAME, for diagnostics. All callers changed. On platforms like GNU/Linux that support O_PATH, fix a race condition in file-attributes and similar functions, so that these functions do not return nonsense if a directory entry is replaced while getting its attributes. On non-GNU platforms, do a better (though not perfect) job of detecting the race, and return nil if detected.
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