elf: Update audit tests to not depend on stdout

The tst-audit14, tst-audit15 and tst-audit16 tests all have audit
modules that write to stdout; the test reads from stdout to confirm
what was written.  This assumes the stdout is a file which is not the
case when run over ssh.

This patch updates the tests to use a post run cmp command to compare
the output against and .exp file.  This is similar to how many other
tests work and it fixes the stdout limitation.  Also, this means the
test code can be greatly simplified.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

diff --git a/elf/Makefile b/elf/Makefile
index 26986c06928836c7079d3626954b1f53bccb6986..bf45d8ee24521e3899a47202ffcc216cc8588617 100644 (file)
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -240,6 +240,10 @@ tests-execstack-yes = tst-execstack tst-execstack-needed tst-execstack-prog
 endif
 ifeq ($(have-depaudit),yes)
 tests += tst-audit14 tst-audit15 tst-audit16
+ifeq ($(run-built-tests),yes)
+tests-special += $(objpfx)tst-audit14-cmp.out $(objpfx)tst-audit15-cmp.out \
+                $(objpfx)tst-audit16-cmp.out
+endif
 endif
 endif
 tests += $(tests-execstack-$(have-z-execstack))
@@ -1492,6 +1496,16 @@ $(objpfx)tst-auditmod17.so: $(objpfx)tst-auditmod17.os
 CFLAGS-.os += $(call elide-stack-protector,.os,tst-auditmod17)
 tst-audit17-ENV = LD_AUDIT=$(objpfx)tst-auditmod17.so
 
+$(objpfx)tst-audit14-cmp.out: tst-audit14.exp $(objpfx)tst-audit14.out
+       cmp $^ > $@; \
+       $(evaluate-test)
+$(objpfx)tst-audit15-cmp.out: tst-audit15.exp $(objpfx)tst-audit15.out
+       cmp $^ > $@; \
+       $(evaluate-test)
+$(objpfx)tst-audit16-cmp.out: tst-audit16.exp $(objpfx)tst-audit16.out
+       cmp $^ > $@; \
+       $(evaluate-test)
+
 # tst-sonamemove links against an older implementation of the library.
 LDFLAGS-tst-sonamemove-linkmod1.so = \
   -Wl,--version-script=tst-sonamemove-linkmod1.map \

diff --git a/elf/tst-audit14.c b/elf/tst-audit14.c
index c57c2184c341ac5c0b40efabeb0a3cfc36221478..13c14b1a92ebbc50571e4ea0969688e23a9be7b6 100644 (file)
--- a/elf/tst-audit14.c
+++ b/elf/tst-audit14.c
@@ -16,30 +16,9 @@
    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 module has 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);
-
-  /* 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;
 }
 

diff --git a/elf/tst-audit14.exp b/elf/tst-audit14.exp
new file mode 100644 (file)
index 0000000..8e96b3c
--- /dev/null
+++ b/elf/tst-audit14.exp
@@ -0,0 +1 @@
+info: tst-auditlogmod-1.so loaded

diff --git a/elf/tst-audit15.c b/elf/tst-audit15.c
index 76f3b9f9ed4b2d7ccf6bcb594ac67698e600b804..c6232eacf2946e4ebdb2a4a91a79bd68759810fa 100644 (file)
--- a/elf/tst-audit15.c
+++ b/elf/tst-audit15.c
@@ -1,50 +1 @@
-/* Main program with DT_AUDIT and DT_DEPAUDIT.  Two audit modules.
-   Copyright (C) 2020-2021 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>
+#include "tst-audit14.c"

diff --git a/elf/tst-audit15.exp b/elf/tst-audit15.exp
new file mode 100644 (file)
index 0000000..ac6d59e
--- /dev/null
+++ b/elf/tst-audit15.exp
@@ -0,0 +1,2 @@
+info: tst-auditlogmod-1.so loaded
+info: tst-auditlogmod-2.so loaded

diff --git a/elf/tst-audit16.c b/elf/tst-audit16.c
index 168a294c86c3eea8294e294b3d34c6943bb40be6..c6232eacf2946e4ebdb2a4a91a79bd68759810fa 100644 (file)
--- a/elf/tst-audit16.c
+++ b/elf/tst-audit16.c
@@ -1,54 +1 @@
-/* Main program with DT_AUDIT and DT_DEPAUDIT.  Three audit modules.
-   Copyright (C) 2020-2021 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);
-
-  line_length = xgetline (&buffer, &buffer_length, fp);
-  message = "info: tst-auditlogmod-3.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>
+#include "tst-audit14.c"

diff --git a/elf/tst-audit16.exp b/elf/tst-audit16.exp
new file mode 100644 (file)
index 0000000..7d6145a
--- /dev/null
+++ b/elf/tst-audit16.exp
@@ -0,0 +1,3 @@
+info: tst-auditlogmod-1.so loaded
+info: tst-auditlogmod-2.so loaded
+info: tst-auditlogmod-3.so loaded