src/fileio.c (Fset_file_selinux_context, Fset_file_acl): Return t if
file's SELinux context or ACLs successfully set, nil otherwise.
lisp/files.el (backup-buffer-copy, basic-save-buffer-2): If
set-file-extended-attributes fails, fall back on set-file-modes
instead of signaling an error.
doc/lispref/files.texi (Changing Files): Document the return values of
set-file-selinux-context and set-file-acl.
doc/lispref/files.texi (File Attributes, Changing Files): Remove the details
about the text returned by file-acl. Instead, just document that
it is an opaque string meant to be used by set-file-acl.
following non-comment text.
(lm-header-multiline): Continuation lines need to be indented more than
the first line.
(lm-homepage): New function.
(lm-with-file): Don't be confused if narrowing is in effect.
* doc/lispref/tips.texi (Library Headers): New header keyword `Homepage'.
Make continuation lines syntax more precise.
Fixes: debbugs:13207
src/w32.c: Include sddl.h and sys/acl.h.
(SDDL_REVISION_1): Define if not already defined.
(g_b_init_get_security_descriptor_dacl)
(g_b_init_convert_sd_to_sddl, g_b_init_convert_sddl_to_sd)
(g_b_init_is_valid_security_descriptor)
(g_b_init_set_file_security): New static flags.
(globals_of_w32): Initialize them to zero.
(SetFileSecurity_Name): New string constant.
(SetFileSecurity_Proc, GetSecurityDescriptorDacl_Proc)
(ConvertStringSecurityDescriptorToSecurityDescriptor_Proc)
(ConvertSecurityDescriptorToStringSecurityDescriptor_Proc)
(IsValidSecurityDescriptor_Proc): New typedefs.
(get_file_security, get_security_descriptor_owner)
(get_security_descriptor_group): Set errno to ENOTSUP.
(set_file_security, get_security_descriptor_dacl)
(is_valid_security_descriptor, convert_sd_to_sddl)
(convert_sddl_to_sd, acl_valid, acl_to_text, acl_from_text)
(acl_free, acl_get_file, acl_set_file): New functions.
src/fileio.c (Fcopy_file) [WINDOWSNT]: Support copying ACLs.
nt/inc/sys/acl.h: New file.
nt/inc/ms-w32.h (ENOTSUP): Define if undefined.
nt/config.nt (HAVE_POSIX_ACL): Define.
doc/lispref/files.texi (File Attributes, Changing Files): Update to include
MS-Windows support for ACLs.
* configure.ac (acl): New option.
(HAVE_POSIX_ACL): Test for POSIX ACL support. This is typically
provided by libacl on GNU/Linux.
* fileio.c (Ffile_acl, Fset_file_acl): New functions.
(Fcopy_file): Change last arg to `preserve_extended_attributes'
and copy ACL entries of file in addition to SELinux context if
set.
(syms_of_fileio): Add `file-acl' and `set-file-acl'.
* Makefile.in (LIBACL_LIBS): New macro.
(LIBES): Use it.
* files.el (file-extended-attributes)
(set-file-extended-attributes): New functions.
(backup-buffer): Use them to handle both SELinux context and ACL
entries.
(backup-buffer-copy): Work with an alist of extended attributes,
rather than an SELinux context.
(basic-save-buffer-2): Ditto.
* files.texi (File Attributes): Document ACL support and new
`file-acl' function.
(Changing Files): Mention argument name change of `copy-file' and
document new function `set-file-acl'.
* configure.ac (BSD4_2): Remove; no longer needed.
* admin/CPP-DEFINES (BSD4_2): Remove.
* doc/lispintro/emacs-lisp-intro.texi (Files List):
directory-files-and-attributes now outputs t for attribute that's
now a placeholder.
* doc/lispref/files.texi (Testing Accessibility): Document GROUP arg
of file-ownership-preserved-p.
(File Attributes): Document that 9th element is now
just a placeholder.
* doc/lispref/os.texi (User Identification): Document new functions group-gid,
group-real-gid.
* etc/NEWS: Document changes to file-attributes,
file-ownership-preserved-p.
Mention new functions group-gid, group-real-gid.
* lisp/files.el (backup-buffer): Don't rely on 9th output of
file-attributes, as it's now a placeholder. Instead, use the new
optional arg of file-ownership-preserved-p.
(file-ownership-preserved-p): New optional arg GROUP.
Fix mishandling of setuid directories that would cause this
function to return t when it should have returned nil.
Document what happens if the file does not exist, and when
it's not known whether the ownership will be preserved.
* lisp/net/tramp-sh.el (tramp-sh-handle-file-ownership-preserved-p):
Likewise.
(tramp-get-local-gid): Use group-gid for integer, as that's
faster and more reliable.
* src/dired.c (Ffile_attributes): Return t as the 9th attribute,
to mark it as a placeholder. The old value was often wrong.
The only user of this attribute has been changed to use
file-ownership-preserved-p instead, with its new group arg.
* src/editfns.c (Fgroup_gid, Fgroup_real_gid): New functions.
Fixes: debbugs:13125
