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authorFlorian Weimer <fweimer@redhat.com>2017-06-21 13:09:08 +0200
committerFlorian Weimer <fweimer@redhat.com>2017-06-21 13:09:08 +0200
commit60149b28590be28051f99d0a343d7fbe002f2a8c (patch)
tree3eb9b2d7016cedd4178a193fe6c0146ec847f7ee /support
parent965d5c391c86eb3a812ce308411c32754f12a9d2 (diff)
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__inet_pton_length: Implement new internal helper function
Diffstat (limited to 'support')
-rw-r--r--support/Makefile1
-rw-r--r--support/xmprotect.c28
-rw-r--r--support/xunistd.h2
3 files changed, 30 insertions, 1 deletions
diff --git a/support/Makefile b/support/Makefile
index a2480cdc70..423538d06a 100644
--- a/support/Makefile
+++ b/support/Makefile
@@ -74,6 +74,7 @@ libsupport-routines = \
xmemstream \
xmkdir \
xmmap \
+ xmprotect \
xmunmap \
xopen \
xpipe \
diff --git a/support/xmprotect.c b/support/xmprotect.c
new file mode 100644
index 0000000000..9410251c32
--- /dev/null
+++ b/support/xmprotect.c
@@ -0,0 +1,28 @@
+/* mprotect with error checking.
+ Copyright (C) 2017 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
+ 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <support/check.h>
+#include <support/xunistd.h>
+#include <sys/mman.h>
+
+void
+xmprotect (void *addr, size_t length, int prot)
+{
+ if (mprotect (addr, length, prot) != 0)
+ FAIL_EXIT1 ("mprotect (%p, %zu, 0x%x): %m", addr, length, prot);
+}
diff --git a/support/xunistd.h b/support/xunistd.h
index 151d743e1f..c947bfd8fb 100644
--- a/support/xunistd.h
+++ b/support/xunistd.h
@@ -48,7 +48,7 @@ void xwrite (int, const void *, size_t);
/* Invoke mmap with a zero file offset. */
void *xmmap (void *addr, size_t length, int prot, int flags, int fd);
-
+void xmprotect (void *addr, size_t length, int prot);
void xmunmap (void *addr, size_t length);
__END_DECLS