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[Patch] [v4] Add Comment to io/fcntl.h
Thanks for your help Roland.
v1
- Initial submission.
v2
- Included missing ChangeLog.
- Adjusted wording.
- Two spaces after periods.
- Reflow text to 80 characters.
v3
- removed "()"
- changed the wording
v4
- Every line is under 80 characters. Patch mangling has been fixed.
Will push this once I get my accounts set up.
2013-02-25 Patsy Franklin <pfrankli@redhat.com>
* io/fcntl.h: Added a comment about AT_EACCESS and AT_REMOVEDIR.
diff --git a/io/fcntl.h b/io/fcntl.h
index 61834ce..fb46143 100644
--- a/io/fcntl.h
+++ b/io/fcntl.h
@@ -129,6 +129,12 @@ typedef __pid_t pid_t;
# define SEEK_END 2 /* Seek from end of file. */
#endif /* XPG */
+/* The constants AT_REMOVEDIR and AT_EACCESS have the same value. AT_EACCESS
+ is meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
+ unlinkat. The two functions do completely different things and therefore,
+ the flags can be allowed to overlap. For example, passing AT_REMOVEDIR to
+ faccessat would be undefined behavior and thus treating it equivalent to
+ AT_EACCESS is valid undefined behavior. */
#ifdef __USE_ATFILE
# define AT_FDCWD -100 /* Special value used to indicate
the *at functions should use the