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curl/tests/unit/unit1652.c

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+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2021, Daniel Stenberg, <[email protected]>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+#include "curlcheck.h"
+
+#include "urldata.h"
+#include "sendf.h"
+
+/*
+ * This test hardcodes the knowledge of the buffer size which is internal to
+ * Curl_infof(). If that buffer is changed in size, this tests needs to be
+ * updated to still be valid.
+ */
+
+static struct Curl_easy *data;
+
+static char input[4096];
+static char result[4096];
+
+int debugf_cb(CURL *handle, curl_infotype type, char *buf, size_t size,
+              void *userptr);
+
+/*
+ * This debugf callback is simply dumping the string into the static buffer
+ * for the unit test to inspect. Since we know that we're only dealing with
+ * text we can afford the luxury of skipping the type check here.
+ */
+int
+debugf_cb(CURL *handle, curl_infotype type, char *buf, size_t size,
+                void *userptr)
+{
+  (void)handle;
+  (void)type;
+  (void)userptr;
+
+  memset(result, '\0', sizeof(result));
+  memcpy(result, buf, size);
+  return 0;
+}
+
+static CURLcode
+unit_setup(void)
+{
+  int res = 0;
+
+  global_init(CURL_GLOBAL_ALL);
+  data = curl_easy_init();
+  if(!data) {
+    curl_global_cleanup();
+    return CURLE_OUT_OF_MEMORY;
+  }
+  curl_easy_setopt(data, CURLOPT_DEBUGFUNCTION, debugf_cb);
+  curl_easy_setopt(data, CURLOPT_VERBOSE, 1L);
+  return CURLE_OK;
+}
+
+static void
+unit_stop(void)
+{
+  curl_easy_cleanup(data);
+  curl_global_cleanup();
+}
+
+UNITTEST_START
+
+/* Injecting a simple short string via a format */
+msnprintf(input, sizeof(input), "Simple Test");
+Curl_infof(data, "%s", input);
+fail_unless(strcmp(result, input) == 0, "Simple string test");
+
+/* Injecting a few different variables with a format */
+Curl_infof(data, "%s %u testing %lu\n", input, 42, 43L);
+fail_unless(strcmp(result, "Simple Test 42 testing 43\n") == 0,
+            "Format string");
+
+/* Variations of empty strings */
+Curl_infof(data, "");
+fail_unless(strlen(result) == 0, "Empty string");
+Curl_infof(data, "%s", NULL);
+fail_unless(strcmp(result, "(nil)") == 0, "Passing NULL as string");
+
+/* A string just long enough to not be truncated */
+memset(input, '\0', sizeof(input));
+memset(input, 'A', 2048);
+Curl_infof(data, "%s", input);
+fail_unless(strlen(result) == 2048, "No truncation of infof input");
+fail_unless(strcmp(result, input) == 0, "No truncation of infof input");
+fail_unless(result[sizeof(result) - 1] == '\0',
+            "No truncation of infof input");
+
+/* Just over the limit for truncation without newline */
+memset(input + 2047, 'A', 4);
+Curl_infof(data, "%s", input);
+fail_unless(strlen(result) == 2048, "Truncation of infof input 1");
+fail_unless(result[sizeof(result) - 1] == '\0', "Truncation of infof input 1");
+fail_unless(strncmp(result + 2045, "...", 3) == 0,
+            "Truncation of infof input 1");
+
+/* Just over the limit for truncation with newline */
+memset(input + 2047, 'A', 4);
+memset(input + 2047 + 4, '\n', 1);
+Curl_infof(data, "%s\n", input);
+fail_unless(strlen(result) == 2048, "Truncation of infof input 2");
+fail_unless(result[sizeof(result) - 1] == '\0', "Truncation of infof input 2");
+fail_unless(strncmp(result + 2044, "...", 3) == 0,
+            "Truncation of infof input 2");
+
+/* Way over the limit for truncation with newline */
+memset(input, '\0', sizeof(input));
+memset(input, 'A', sizeof(input) - 1);
+Curl_infof(data, "%s\n", input);
+fail_unless(strlen(result) == 2048, "Truncation of infof input 3");
+fail_unless(result[sizeof(result) - 1] == '\0', "Truncation of infof input 3");
+fail_unless(strncmp(result + 2044, "...", 3) == 0,
+            "Truncation of infof input 3");
+
+UNITTEST_STOP