a switch to disable logging in optimized builds #1103

src/lib/misc.cpp

@@ -234,6 +234,21 @@ rnp_clear_debug()
     debugc = 0;
 }
 
+short _rnp_log_switch =
+#ifdef NDEBUG
+  -1 // lazy-initialize later
+#else
+  1 // always on in debug build
+#endif
+  ;
+
+void
+rnp_init_log_switch()
+{
+    const char *var = getenv("RNP_LOG_CONSOLE");
+    _rnp_log_switch = !!var;
+}
+
 /* portable replacement for strcasecmp(3) */
 int
 rnp_strcasecmp(const char *s1, const char *s2)

src/lib/utils.h

@@ -33,6 +33,11 @@
 #define RNP_MSG(msg) (void) fprintf(stdout, msg);
 #define RNP_LOG_FD(fd, ...)                                                  \
     do {                                                                     \
+        if (_rnp_log_switch < 0) {                                           \
+            rnp_init_log_switch();                                           \
+        }                                                                    \
+        if (!_rnp_log_switch)                                                \
+            break;                                                           \
         (void) fprintf((fd), "[%s() %s:%d] ", __func__, __FILE__, __LINE__); \
         (void) fprintf((fd), __VA_ARGS__);                                   \
         (void) fprintf((fd), "\n");                                          \
@@ -133,6 +138,14 @@ bool rnp_set_debug(const char *);
 bool rnp_get_debug(const char *);
 void rnp_clear_debug();
 
+/* -1 -- not initialized
+    0 -- logging is off
+    1 -- loggin is on
+*/
+extern short _rnp_log_switch;
+/* initialize logging switch from environment */
+void rnp_init_log_switch();
+
 /* Portable way to convert bits to bytes */
 
 #define BITS_TO_BYTES(b) (((b) + (CHAR_BIT - 1)) / CHAR_BIT)

src/tests/CMakeLists.txt

@@ -82,6 +82,7 @@ add_executable(rnp_tests
   large-mpi.cpp
   load-g10.cpp
   load-pgp.cpp
+  log-switch.cpp
   partial-length.cpp
   rnp_tests.cpp
   s2k-iterations.cpp

src/tests/log-switch.cpp

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018-2019 [Ribose Inc](https://www.ribose.com).
+ * 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 "rnp_tests.h"
+#include "support.h"
+
+TEST_F(rnp_tests, test_log_switch)
+{
+    FILE * stream;
+    char * buf;
+    size_t len;
+
+    stream = open_memstream(&buf, &len);
+    assert_non_null(stream);
+
+    // reset _rnp_log_switch manually
+    _rnp_log_switch = 0;
+    RNP_LOG_FD(stream, "x");
+    fflush(stream);
+    assert_int_equal(0, len); // nothing was written
+
+    // enable _rnp_log_switch manually
+    _rnp_log_switch = 1;
+    RNP_LOG_FD(stream, "x");
+    fflush(stream);
+    assert_true(len > 0); // something was written
+    fclose(stream);
+    free(buf);
+}

src/tests/rnp_tests.h

@@ -361,6 +361,8 @@ void test_kbx_nsigs(void **state);
 
 void test_issue_1115(void **state);
 
+void test_log_switch(void **state);
+
 #define assert_true(a) EXPECT_TRUE((a))
 #define assert_false(a) EXPECT_FALSE((a))
 #define assert_string_equal(a, b) EXPECT_STREQ((a), (b))