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| author | Patsy Franklin <pfrankli@redhat.com> | 2013-03-06 12:54:10 -0500 |
|---|---|---|
| committer | Patsy Franklin <pfrankli@redhat.com> | 2013-03-06 13:39:16 -0500 |
| commit | 39120df9b9e2ad9674c0d6265757a7a68e10051f (patch) | |
| tree | ddef45a58945fed230d26a155bbc10739b3fa864 /io/fcntl.h | |
| parent | 664a9ce4ca40feabff781fff044c93a43ae15b59 (diff) | |
| download | glibc-39120df9b9e2ad9674c0d6265757a7a68e10051f.tar.gz glibc-39120df9b9e2ad9674c0d6265757a7a68e10051f.tar.xz glibc-39120df9b9e2ad9674c0d6265757a7a68e10051f.zip | |
T_REMOVEDIR and AT_EACCESS have the same value.
Add comments to fcntl.h explaining why AT_REMOVEDIR and AT_EACCESS can have the same value.
Diffstat (limited to 'io/fcntl.h')
| -rw-r--r-- | io/fcntl.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/io/fcntl.h b/io/fcntl.h index 61834cef1b..14ccae0d26 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_EASSESS + 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 |