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authorJoseph Myers <joseph@codesourcery.com>2014-12-16 18:18:49 +0000
committerJoseph Myers <joseph@codesourcery.com>2014-12-16 18:18:49 +0000
commit9a44d530c464d081e925b1c1af2b8bbe6e7b3207 (patch)
treea426306b1967ad948ba3a7351f87fa177aba019a /sysdeps/unix/sysv
parentd003ada20e8015df173c06f3292acacc7b148632 (diff)
downloadglibc-9a44d530c464d081e925b1c1af2b8bbe6e7b3207.tar.gz
Fix resolver if_* namespace (bug 17717).
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.
Diffstat (limited to 'sysdeps/unix/sysv')
-rw-r--r--sysdeps/unix/sysv/linux/if_index.c24
1 files changed, 15 insertions, 9 deletions
diff --git a/sysdeps/unix/sysv/linux/if_index.c b/sysdeps/unix/sysv/linux/if_index.c
index 0fac763f9f..b0644f2f9d 100644
--- a/sysdeps/unix/sysv/linux/if_index.c
+++ b/sysdeps/unix/sysv/linux/if_index.c
@@ -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)