3 files changed, 40 insertions, 5 deletions
diff --git a/sysdeps/generic/backtracesymsfd.c b/sysdeps/generic/backtracesymsfd.c
index a730607a3d..c704362ec7 100644
--- a/sysdeps/generic/backtracesymsfd.c
+++ b/sysdeps/generic/backtracesymsfd.c
@@ -1,5 +1,5 @@
 /* Write formatted list with names for addresses in backtrace to a file.
-   Copyright (C) 1998 Free Software Foundation, Inc.
+   Copyright (C) 1998, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
 
@@ -23,11 +23,12 @@
 #include <sys/uio.h>
 
 #include <stdio-common/_itoa.h>
+#include <not-cancel.h>
 
 #if __ELF_NATIVE_CLASS == 32
 # define WORD_WIDTH 8
 #else
-/* We assyme 64bits.  */
+/* We assume 64bits.  */
 # define WORD_WIDTH 16
 #endif
 
@@ -55,7 +56,8 @@ __backtrace_symbols_fd (array, size, fd)
       iov[2].iov_base = (void *) "]\n";
       iov[2].iov_len = 2;
 
-      __writev (fd, iov, 3);
+      /* We prefer to use the non-cancelable interface if it is available.  */
+      writev_not_cancel_no_status (fd, iov, 3);
     }
 }
 weak_alias (__backtrace_symbols_fd, backtrace_symbols_fd)
diff --git a/sysdeps/generic/check_fds.c b/sysdeps/generic/check_fds.c
index ff9562de08..8a3efd1b37 100644
--- a/sysdeps/generic/check_fds.c
+++ b/sysdeps/generic/check_fds.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -32,6 +32,7 @@
 #endif
 
 #include <device-nrs.h>
+#include <not-cancel.h>
 
 
 /* Should other OSes (e.g., Hurd) have different versions which can
@@ -39,6 +40,7 @@
 static void
 check_one_fd (int fd, int mode)
 {
+  /* Note that fcntl() with this parameter is not a cancellation point.  */
   if (__builtin_expect (__libc_fcntl (fd, F_GETFD), 0) == -1
       && errno == EBADF)
     {
@@ -47,7 +49,7 @@ check_one_fd (int fd, int mode)
       /* Something is wrong with this descriptor, it's probably not
 	 opened.  Open /dev/null so that the SUID program we are
 	 about to start does not accidently use this descriptor.  */
-      int nullfd = __libc_open (_PATH_DEVNULL, mode);
+      int nullfd = open_not_cancel (_PATH_DEVNULL, mode);
       /* We are very paranoid here.  With all means we try to ensure
 	 that we are actually opening the /dev/null device and nothing
 	 else.
diff --git a/sysdeps/generic/not-cancel.h b/sysdeps/generic/not-cancel.h
new file mode 100644
index 0000000000..b87c16034b
--- /dev/null
+++ b/sysdeps/generic/not-cancel.h
@@ -0,0 +1,31 @@
+/* Uncancelable versions of cancelable interfaces.  Generic version.
+   Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* By default we have none.  Map the name to the normal functions.  */
+#define open_not_cancel(name, flags, mode...) \
+  __libc_open (name, flags, ##mode)
+#define close_not_cancel_no_status(fd) \
+  (void) __close (fd)
+#define read_not_cancel(fd, buf, n) \
+  __read (fd, buf, n)
+#define write_not_cancel(fd, buf, n) \
+  __write (fd, buf, n)
+#define writev_not_cancel_no_status(fd, iov, n) \
+  (void) __writev (fd, iov, n)