testsuite_fs.h (nonexistent_path): Use less generic name for paths.

	* testsuite/util/testsuite_fs.h (nonexistent_path): Use less generic
	name for paths. Prefer snprintf to sprintf.

From-SVN: r228416

libstdc++-v3/ChangeLog

 2015-10-02  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/util/testsuite_fs.h (nonexistent_path): Use less generic
+	name for paths. Prefer snprintf to sprintf.
+
 	PR libstdc++/67747
 	* src/filesystem/dir.cc (native_readdir): Remove.
 	(_Dir::advance): Use readdir instead of native_readdir.

libstdc++-v3/testsuite/util/testsuite_fs.h

@@ -73,7 +73,7 @@ namespace __gnu_test
   {
     std::experimental::filesystem::path p;
 #if defined(_GNU_SOURCE) || _XOPEN_SOURCE >= 500 || _POSIX_C_SOURCE >= 200112L
-    char tmp[] = "test.XXXXXX";
+    char tmp[] = "filesystem-ts-test.XXXXXX";
     int fd = ::mkstemp(tmp);
     if (fd == -1)
       throw std::experimental::filesystem::filesystem_error("mkstemp failed",
@@ -83,7 +83,11 @@ namespace __gnu_test
     p = tmp;
 #else
     char buf[64];
-    std::sprintf(buf, "test.%lu", (unsigned long)::getpid());
+#if _GLIBCXX_USE_C99
+    std::snprintf(buf, 64, "filesystem-ts-test.%lu", (unsigned long)::getpid());
+#else
+    std::sprintf(buf, "filesystem-ts-test.%lu", (unsigned long)::getpid());
+#endif
     p = buf;
 #endif
     return p;