Update.

	* sysdeps/generic/utmp_file.c: Use not-cancelable syscalls all
	over the place.  It would be allowed to have these fucntions as
	cancellation points but the cleanup would be ugly and a lot of
	work.

	* sysdeps/generic/not-cancel.h (fcntl_not_cancel): Define.
	* sysdeps/unix/sysv/linux/not-cancel.h (fcntl_not_cancel): Define.

	* include/fcntl.h (__fcntl_nocancel): Declare.
	* sysdeps/unix/sysv/linux/fcntl.c: New file.
	* sysdeps/unix/sysv/linux/i386/fcntl.c (__libc_fcntl): Only enable
	cancellation if absolutely needed.
	(__fcntl_nocancel): Define.

	* posix/unistd.h (gethostid): Remove __THROW.  Clarify comment.
	* sysdeps/unix/sysv/linux/Makefile (CFLAGS-gethostid.c): Add
	-fexceptions.
	* sysdeps/unix/sysv/linux/gethostid.c (gethostid): Use
	extend_alloca.

	* resolv/res_init.c (__res_nclose): Use close_not_cancel_no_status
	instead of __close.

1 files changed, 11 insertions, 7 deletions

diff --git a/sysdeps/unix/sysv/linux/i386/fcntl.c b/sysdeps/unix/sysv/linux/i386/fcntl.c
index 749288d92b..c0ca1257f1 100644
--- a/sysdeps/unix/sysv/linux/i386/fcntl.c
+++ b/sysdeps/unix/sysv/linux/i386/fcntl.c
@@ -28,11 +28,13 @@
 #if __ASSUME_FCNTL64 == 0
 /* This variable is shared with all files that check for fcntl64.  */
 int __have_no_fcntl64;
+#endif
 
 
-static int
-do_fcntl (int fd, int cmd, void *arg)
+int
+__fcntl_nocancel (int fd, int cmd, void *arg)
 {
+#if __ASSUME_FCNTL64 == 0
 # ifdef __NR_fcntl64
   if (! __have_no_fcntl64)
     {
@@ -113,8 +115,10 @@ do_fcntl (int fd, int cmd, void *arg)
       return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg);
     }
   return -1;
+#else
+  return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
+#endif  /* !__ASSUME_FCNTL64  */
 }
-#endif  /* __ASSUME_FCNTL64  */
 
 
 int
@@ -128,19 +132,19 @@ __libc_fcntl (int fd, int cmd, ...)
   va_end (ap);
 
 #if __ASSUME_FCNTL64 > 0
-  if (SINGLE_THREAD_P)
+  if (SINGLE_THREAD_P || (cmd != F_SETLKW && cmd != F_SETLKW64))
     return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
 
   int oldtype = LIBC_CANCEL_ASYNC ();
 
   int result = INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
 #else
-  if (SINGLE_THREAD_P)
-    return do_fcntl (fd, cmd, arg);
+  if (SINGLE_THREAD_P || (cmd != F_SETLKW && cmd != F_SETLKW64))
+    return __fcntl_nocancel (fd, cmd, arg);
 
   int oldtype = LIBC_CANCEL_ASYNC ();
 
-  int result = do_fcntl (fd, cmd, arg);
+  int result = __fcntl_nocancel (fd, cmd, arg);
 #endif
 
   LIBC_CANCEL_RESET (oldtype);