Fix nice getpriority, setpriority namespace (bug 18553).

nice (XPG3) calls getpriority and setpriority (in XPG4 but not XPG3,
i.e. UX-shaded in XPG4).  This patch fixes this by making those
functions into weak aliases of __* functions and calling the __*
versions as needed.

Tested for x86_64 and x86 (testsuite, and that disassembly of
installed shared libraries is unchanged by this patch).

This completes cleaning up the unsorted linknamespace test XFAILs.

	[BZ #18553]
	* resource/getpriority.c (getpriority): Rename to __getpriority
	and define as weak alias of __getpriority.
	* resource/setpriority.c (setpriority): Rename to __setpriority
	and define as weak alias of __setpriority.
	* sysdeps/mach/hurd/getpriority.c (getpriority): Rename to
	__getpriority and define as weak alias of __getpriority.
	* sysdeps/mach/hurd/setpriority.c (setpriority): Rename to
	__setpriority and define as weak alias of __setpriority.
	* sysdeps/unix/syscalls.list (getpriority): Use __getpriority as
	strong name.
	(setpriority): Use __setpriority as strong name.
	* sysdeps/unix/sysv/linux/getpriority.c (getpriority): Rename to
	__getpriority and define as weak alias of __getpriority.
	* include/sys/resource.h (__getpriority): Declare.  Use
	libc_hidden_proto.
	(__setpriority): Likewise.
	(getpriority): Don't use libc_hidden_proto.
	(setpriority): Likewise.
	* sysdeps/posix/nice.c (nice): Call __getpriority instead of
	getpriority.  Call __setpriority instead of setpriority.
	* conform/Makefile (test-xfail-XPG3/unistd.h/linknamespace):
	Remove variable.

1 files changed, 3 insertions, 3 deletions

diff --git a/sysdeps/posix/nice.c b/sysdeps/posix/nice.c
index 67b127348f..42bb99b7e1 100644
--- a/sysdeps/posix/nice.c
+++ b/sysdeps/posix/nice.c
@@ -31,7 +31,7 @@ nice (int incr)
   /* -1 is a valid priority, so we use errno to check for an error.  */
   save = errno;
   __set_errno (0);
-  prio = getpriority (PRIO_PROCESS, 0);
+  prio = __getpriority (PRIO_PROCESS, 0);
   if (prio == -1)
     {
       if (errno != 0)
@@ -40,12 +40,12 @@ nice (int incr)
 	__set_errno (save);
     }
 
-  result = setpriority (PRIO_PROCESS, 0, prio + incr);
+  result = __setpriority (PRIO_PROCESS, 0, prio + incr);
   if (result == -1)
     {
       if (errno == EACCES)
 	errno = EPERM;
       return -1;
     }
-  return getpriority (PRIO_PROCESS, 0);
+  return __getpriority (PRIO_PROCESS, 0);
 }