elf: Implement DT_AUDIT, DT_DEPAUDIT support [BZ #24943]

binutils ld has supported --audit, --depaudit for a long time,
only support in glibc has been missing.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/elf/tst-audit15.c b/elf/tst-audit15.c
new file mode 100644
index 0000000000..cbd1589ec4
--- /dev/null
+++ b/elf/tst-audit15.c
@@ -0,0 +1,50 @@
+/* Main program with DT_AUDIT and DT_DEPAUDIT.  Two audit modules.
+   Copyright (C) 2020 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/xstdio.h>
+
+static int
+do_test (void)
+{
+  /* Verify what the audit modules have written.  This test assumes
+     that standard output has been redirected to a regular file.  */
+  FILE *fp = xfopen ("/dev/stdout", "r");
+
+  char *buffer = NULL;
+  size_t buffer_length = 0;
+  size_t line_length = xgetline (&buffer, &buffer_length, fp);
+  const char *message = "info: tst-auditlogmod-1.so loaded\n";
+  TEST_COMPARE_BLOB (message, strlen (message), buffer, line_length);
+
+  line_length = xgetline (&buffer, &buffer_length, fp);
+  message = "info: tst-auditlogmod-2.so loaded\n";
+  TEST_COMPARE_BLOB (message, strlen (message), buffer, line_length);
+
+  /* No more audit module output.  */
+  line_length = xgetline (&buffer, &buffer_length, fp);
+  TEST_COMPARE_BLOB ("", 0, buffer, line_length);
+
+  free (buffer);
+  xfclose (fp);
+  return 0;
+}
+
+#include <support/test-driver.c>