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resolv: Move dn_expand to its own file and into libc

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And reformat to GNU style.

This switches back to the dn_expand name for the ABI symbol and turns
__dn_expand into a compatibility symbol.  With the improved namespace
management in current glibc, it is no longer necessary to use a
private namespace symbol.  To avoid old code binding to a
GLIBC_PRIVATE symbol by accident, use __libc_dn_expand for the
internal symbol name.

The symbols dn_expand, __dnexpand were moved using
scripts/move-symbol-to-libc.py, followed by an adjustment to make
dn_expand the only GLIBC_2.34 symbol.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer
2021-07-19 07:55:27 +02:00
parent 13e1f86706
commit 640bbdf71c
76 changed files with 219 additions and 90 deletions
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4
resolv/ns_parse.c
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@ -154,8 +154,8 @@ ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr) {
}
/* Do the parse. */
b = dn_expand(handle->_msg, handle->_eom,
handle->_msg_ptr, rr->name, NS_MAXDNAME);
b = __libc_dn_expand (handle->_msg, handle->_eom,
handle->_msg_ptr, rr->name, NS_MAXDNAME);
if (b < 0)
return (-1);
handle->_msg_ptr += b;