grpc1.45.2/third_party/libuv/test/test-process-title.c

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 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * IN THE SOFTWARE.
 */

#include "uv.h"
#include "task.h"
#include <string.h>


static void set_title(const char* title) {
  char buffer[512];
  int err;

  err = uv_get_process_title(buffer, sizeof(buffer));
  ASSERT(err == 0);

  err = uv_set_process_title(title);
  ASSERT(err == 0);

  err = uv_get_process_title(buffer, sizeof(buffer));
  ASSERT(err == 0);

  ASSERT(strcmp(buffer, title) == 0);
}


static void uv_get_process_title_edge_cases(void) {
  char buffer[512];
  int r;

  /* Test a NULL buffer */
  r = uv_get_process_title(NULL, 100);
  ASSERT(r == UV_EINVAL);

  /* Test size of zero */
  r = uv_get_process_title(buffer, 0);
  ASSERT(r == UV_EINVAL);

  /* Test for insufficient buffer size */
  r = uv_get_process_title(buffer, 1);
  ASSERT(r == UV_ENOBUFS);
}


TEST_IMPL(process_title) {
#if defined(__sun) || defined(__CYGWIN__) || defined(__MSYS__) || \
    defined(__PASE__)
  RETURN_SKIP("uv_(get|set)_process_title is not implemented.");
#endif

  /* Check for format string vulnerabilities. */
  set_title("%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s");
  set_title("new title");

  /* Check uv_get_process_title() edge cases */
  uv_get_process_title_edge_cases();

  return 0;
}


static void exit_cb(uv_process_t* process, int64_t status, int signo) {
  ASSERT(status == 0);
  ASSERT(signo == 0);
  uv_close((uv_handle_t*) process, NULL);
}


TEST_IMPL(process_title_big_argv) {
  uv_process_options_t options;
  uv_process_t process;
  size_t exepath_size;
  char exepath[1024];
  char jumbo[512];
  char* args[5];

#ifdef _WIN32
  /* Remove once https://github.com/libuv/libuv/issues/2667 is fixed. */
  uv_set_process_title("run-tests");
#endif

  exepath_size = sizeof(exepath) - 1;
  ASSERT(0 == uv_exepath(exepath, &exepath_size));
  exepath[exepath_size] = '\0';

  memset(jumbo, 'x', sizeof(jumbo) - 1);
  jumbo[sizeof(jumbo) - 1] = '\0';

  /* Note: need to pass three arguments, not two, otherwise
   * run-tests.c thinks it's the name of a test to run.
   */
  args[0] = exepath;
  args[1] = "process_title_big_argv_helper";
  args[2] = jumbo;
  args[3] = jumbo;
  args[4] = NULL;

  memset(&options, 0, sizeof(options));
  options.file = exepath;
  options.args = args;
  options.exit_cb = exit_cb;

  ASSERT(0 == uv_spawn(uv_default_loop(), &process, &options));
  ASSERT(0 == uv_run(uv_default_loop(), UV_RUN_DEFAULT));

  MAKE_VALGRIND_HAPPY();
  return 0;
}


/* Called by process_title_big_argv_helper. */
void process_title_big_argv(void) {
  char buf[256] = "fail";

  /* Return value deliberately ignored. */
  uv_get_process_title(buf, sizeof(buf));
  ASSERT(0 != strcmp(buf, "fail"));
}