1 files changed, 56 insertions, 0 deletions
diff --git a/ext/libelf/elf_rand.c b/ext/libelf/elf_rand.c
new file mode 100644
index 000000000..ac44aea31
--- /dev/null
+++ b/ext/libelf/elf_rand.c
@@ -0,0 +1,56 @@
+/*-
+ * Copyright (c) 2006 Joseph Koshy
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+
+#include <ar.h>
+#include "libelf.h"
+
+#include "_libelf.h"
+
+off_t
+elf_rand(Elf *ar, off_t offset)
+{
+        struct ar_hdr *arh;
+
+        if (ar == NULL || ar->e_kind != ELF_K_AR ||
+            (offset & 1) || offset < SARMAG ||
+            offset + sizeof(struct ar_hdr) >= ar->e_rawsize) {
+                LIBELF_SET_ERROR(ARGUMENT, 0);
+                return 0;
+        }
+
+        arh = (struct ar_hdr *) (ar->e_rawfile + offset);
+
+        /* a too simple sanity check */
+        if (arh->ar_fmag[0] != '`' || arh->ar_fmag[1] != '\n') {
+                LIBELF_SET_ERROR(ARCHIVE, 0);
+                return 0;
+        }
+
+        ar->e_u.e_ar.e_next = offset;
+
+        return (offset);
+}