why are some stat.h "S_*" perm macros not exported via uapi?

[Robert P. J. Day]

  more pedantry ... just noticed this snippet in include/linux/stat.h:

...
  #include <uapi/linux/stat.h>

  #define S_IRWXUGO       (S_IRWXU|S_IRWXG|S_IRWXO)
  #define S_IALLUGO       (S_ISUID|S_ISGID|S_ISVTX|S_IRWXUGO)
  #define S_IRUGO         (S_IRUSR|S_IRGRP|S_IROTH)
  #define S_IWUGO         (S_IWUSR|S_IWGRP|S_IWOTH)
  #define S_IXUGO         (S_IXUSR|S_IXGRP|S_IXOTH)
...

given that all of the other S_ perm macros are exported in
include/uapi/linux/stat.h, as in:

  #define S_IRWXU 00700
  #define S_IRUSR 00400
  #define S_IWUSR 00200
  #define S_IXUSR 00100

  #define S_IRWXG 00070
  #define S_IRGRP 00040
  #define S_IWGRP 00020
  #define S_IXGRP 00010

and so on, is there a reason those few combination perm macros are not
exported as well? or is the userspace stat.h so well-defined at this
point that cosmetic changes like this are frowned upon?

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
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