Hi!

Here's a draft of a patch set for adding a centralized at(2) manual page
and using it elsewhere to:

-  De-duplicate documentation about *at() system calls.
-  Make the slight differences more obvious.
-  Have a central specification of how new *at() system calls should
   look like, so that differences don't grow unnecessarily.
-  Try to remove the unnecessary differences, if we can.


Have a lovely day!
Alex

Alejandro Colomar (8):
  man/man3const/_ATFILE_SOURCE.3const: Add page
  man/man2/at.2: Add link page
  man/man2/chown.2: Refer to at(2)
  man/man2/mount_setattr.2: Refer to at(2)
  man/man2/open_tree.2: Refer to at(2)
  man/man2/rename.2: Refer to at(2)
  man/man3const/_ATFILE_SOURCE.3const: Some functions report ESRCH
    instead of EACCES
  man/man2/utimensat.2: Refer to at(2)

 man/man2/at.2                       |   1 +
 man/man2/chown.2                    | 114 ++-----------------
 man/man2/mount_setattr.2            |  66 +++--------
 man/man2/open_tree.2                | 168 ++-------------------------
 man/man2/rename.2                   |  84 +-------------
 man/man2/utimensat.2                | 141 ++---------------------
 man/man3const/_ATFILE_SOURCE.3const | 170 ++++++++++++++++++++++++++++
 7 files changed, 214 insertions(+), 530 deletions(-)
 create mode 100644 man/man2/at.2
 create mode 100644 man/man3const/_ATFILE_SOURCE.3const

Range-diff against v1:
-:  ------------ > 1:  39bf4d24176a man/man3const/_ATFILE_SOURCE.3const: Add page
-:  ------------ > 2:  56086d43dbe4 man/man2/at.2: Add link page
-:  ------------ > 3:  7fdc286a682a man/man2/chown.2: Refer to at(2)
-:  ------------ > 4:  c206656df161 man/man2/mount_setattr.2: Refer to at(2)
-:  ------------ > 5:  4e8ce7b9cf9d man/man2/open_tree.2: Refer to at(2)
-:  ------------ > 6:  8a5ac3f93ba5 man/man2/rename.2: Refer to at(2)
-:  ------------ > 7:  8ae17f3f6863 man/man3const/_ATFILE_SOURCE.3const: Some functions report ESRCH instead of EACCES
-:  ------------ > 8:  3de33c76083e man/man2/utimensat.2: Refer to at(2)
-- 
2.55.0