Fix __if_freereq crash: Unlike the generic version which uses free, Hurd needs munmap.

2 files changed, 51 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 7d05dbe4f7..0113c4c6e1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2011-02-22  Samuel Thibault  <samuel.thibault@ens-lyon.org>
+
+        Fix __if_freereq crash: Unlike the generic version which uses free,
+	Hurd needs munmap.
+	* sysdeps/mach/hurd/ifreq.h: New file.
+
 2011-01-27  Petr Baudis  <pasky@suse.cz>
 	    Ulrich Drepper  <drepper@gmail.com>
 
diff --git a/sysdeps/mach/hurd/ifreq.h b/sysdeps/mach/hurd/ifreq.h
new file mode 100644
index 0000000000..92cb7b98dd
--- /dev/null
+++ b/sysdeps/mach/hurd/ifreq.h
@@ -0,0 +1,45 @@
+/* Copyright (C) 1999, 2002, 2003, 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Jaeger <aj@suse.de>.
+
+   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.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+
+static inline struct ifreq *
+__if_nextreq (struct ifreq *ifr)
+{
+#ifdef _HAVE_SA_LEN
+  if (ifr->ifr_addr.sa_len > sizeof ifr->ifr_addr)
+    return (struct ifreq *) ((char *) &ifr->ifr_addr + ifr->ifr_addr.sa_len);
+#endif
+  return ifr + 1;
+}
+
+extern void __ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd);
+
+
+static inline void
+__if_freereq (struct ifreq *ifreqs, int num_ifs)
+{
+  munmap (ifreqs, num_ifs * sizeof (struct ifreq));
+}