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Fix resolver if_* namespace (bug 17717).

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Resolver code, brought in by pthreads (at least), uses if_* interfaces
that weren't in POSIX before 2001, resulting in linknamespace
failures.  This patch changes those interfaces to be weak aliases of
__if_* and makes the resolver use __if_* directly.

Tested for x86_64 (testsuite, and that disassembly of installed shared
libraries is unchanged by this patch).

	[BZ #17717]
	* inet/if_index.c (if_nametoindex): Rename to __if_nametoindex and
	define as weak alias of __if_nametoindex.  Use libc_hidden_weak.
	(if_indextoname): Rename to __if_indextoname and define as weak
	alias of __if_indextoname.  Use libc_hidden_weak.
	(if_freenameindex): Rename to __if_freenameindex and define as
	weak alias of __if_freenameindex.
	(if_nameindex): Rename to __if_nameindex and define as weak alias
	of __if_nameindex.
	* sysdeps/mach/hurd/if_index.c (if_nametoindex): Rename to
	__if_nametoindex and define as weak alias of __if_nametoindex.
	Use libc_hidden_weak.
	(if_freenameindex): Rename to __if_freenameindex and define as
	weak alias of __if_freenameindex.
	(if_nameindex): Rename to __if_nameindex and define as weak alias
	of __if_nameindex.
	(if_indextoname): Rename to __if_indextoname and define as weak
	alias of __if_indextoname.  Use libc_hidden_weak.
	* sysdeps/unix/sysv/linux/if_index.c (if_nametoindex): Rename to
	__if_nametoindex and define as weak alias of __if_nametoindex.
	Use libc_hidden_weak.
	(if_freenameindex): Rename to __if_freenameindex and define as
	weak alias of __if_freenameindex.  Use libc_hidden_weak.
	(if_nameindex_netlink): Use __if_freenameindex instead of
	if_freenameindex.
	(if_nameindex): Rename to __if_nameindex and define as weak alias
	of __if_nameindex.  Use libc_hidden_weak.
	(if_indextoname): Rename to __if_indextoname and define as weak
	alias of __if_indextoname.  Use libc_hidden_weak.
	* include/net/if.h [!_ISOMAC] (__if_nametoindex): Declare and use
	libc_hidden_proto.
	[!_ISOMAC] (__if_freenameindex): Likewise.
	* resolv/res_init.c (__res_vinit): Use __if_nametoindex instead of
	if_nametoindex.
	* conform/Makefile (test-xfail-XPG4/grp.h/linknamespace): Remove
	variable.
	(test-xfail-XPG4/pwd.h/linknamespace): Likewise.
	(test-xfail-UNIX98/aio.h/linknamespace): Likewise.
	(test-xfail-UNIX98/grp.h/linknamespace): Likewise.
	(test-xfail-UNIX98/pthread.h/linknamespace): Likewise.
	(test-xfail-UNIX98/pwd.h/linknamespace): Likewise.
	(test-xfail-UNIX98/sched.h/linknamespace): Likewise.
	(test-xfail-UNIX98/time.h/linknamespace): Likewise.
This commit is contained in:
Joseph Myers
2014-12-16 18:18:49 +00:00
parent d003ada20e
commit 9a44d530c4
8 changed files with 87 additions and 31 deletions
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24
sysdeps/unix/sysv/linux/if_index.c
View File

@ -31,7 +31,7 @@
unsigned int
if_nametoindex (const char *ifname)
__if_nametoindex (const char *ifname)
{
#ifndef SIOCGIFINDEX
__set_errno (ENOSYS);
@ -56,11 +56,13 @@ if_nametoindex (const char *ifname)
return ifr.ifr_ifindex;
#endif
}
libc_hidden_def (if_nametoindex)
libc_hidden_def (__if_nametoindex)
weak_alias (__if_nametoindex, if_nametoindex)
libc_hidden_weak (if_nametoindex)
void
if_freenameindex (struct if_nameindex *ifn)
__if_freenameindex (struct if_nameindex *ifn)
{
struct if_nameindex *ptr = ifn;
while (ptr->if_name || ptr->if_index)
@ -70,7 +72,9 @@ if_freenameindex (struct if_nameindex *ifn)
}
free (ifn);
}
libc_hidden_def (if_freenameindex)
libc_hidden_def (__if_freenameindex)
weak_alias (__if_freenameindex, if_freenameindex)
libc_hidden_weak (if_freenameindex)
static struct if_nameindex *
@ -162,7 +166,7 @@ if_nameindex_netlink (void)
if (idx[nifs].if_name == NULL)
{
idx[nifs].if_index = 0;
if_freenameindex (idx);
__if_freenameindex (idx);
idx = NULL;
goto nomem;
}
@ -189,7 +193,7 @@ if_nameindex_netlink (void)
struct if_nameindex *
if_nameindex (void)
__if_nameindex (void)
{
#ifndef SIOCGIFINDEX
__set_errno (ENOSYS);
@ -199,11 +203,12 @@ if_nameindex (void)
return result;
#endif
}
libc_hidden_def (if_nameindex)
weak_alias (__if_nameindex, if_nameindex)
libc_hidden_weak (if_nameindex)
char *
if_indextoname (unsigned int ifindex, char *ifname)
__if_indextoname (unsigned int ifindex, char *ifname)
{
/* We may be able to do the conversion directly, rather than searching a
list. This ioctl is not present in kernels before version 2.1.50. */
@ -232,4 +237,5 @@ if_indextoname (unsigned int ifindex, char *ifname)
else
return strncpy (ifname, ifr.ifr_name, IFNAMSIZ);
}
libc_hidden_def (if_indextoname)
weak_alias (__if_indextoname, if_indextoname)
libc_hidden_weak (if_indextoname)