1 files changed, 97 insertions, 0 deletions
diff --git a/externals/breakpad/src/third_party/lss/tests/lstat.c b/externals/breakpad/src/third_party/lss/tests/lstat.c
new file mode 100644
index 0000000000..816ba9faab
--- /dev/null
+++ b/externals/breakpad/src/third_party/lss/tests/lstat.c
@@ -0,0 +1,97 @@
+/* Copyright 2021 Google LLC
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google LLC nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * 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 "test_skel.h"
+
+int main(int argc, char *argv[]) {
+  int exit_status = 0;
+
+  // Get two unique paths to play with.
+  char foo[] = "tempfile.XXXXXX";
+  char bar[] = "tempfile.XXXXXX";
+  int fd_foo = mkstemp(foo);
+  int fd_bar = mkstemp(bar);
+  assert(fd_foo != -1);
+  assert(fd_bar != -1);
+
+  // Then delete foo.
+  assert(sys_unlink(foo) == 0);
+
+  // Now make foo a symlink to bar.
+  assert(symlink(bar, foo) == 0);
+
+  // Make sure sys_stat() and sys_lstat() implementation return different
+  // information.
+
+  // We need to check our stat syscalls for EOVERFLOW, as sometimes the integer
+  // types used in the stat structures are too small to fit the actual value.
+  // E.g. on some systems st_ino is 32-bit, but some filesystems have 64-bit
+  // inodes.
+
+  struct kernel_stat lstat_info;
+  int rc = sys_lstat(foo, &lstat_info);
+  if (rc < 0 && errno == EOVERFLOW) {
+    // Bail out since we had an overflow in the stat structure.
+    exit_status = SKIP_TEST_EXIT_STATUS;
+    goto cleanup;
+  }
+  assert(rc == 0);
+
+  struct kernel_stat stat_info;
+  rc = sys_stat(foo, &stat_info);
+  if (rc < 0 && errno == EOVERFLOW) {
+    // Bail out since we had an overflow in the stat structure.
+    exit_status = SKIP_TEST_EXIT_STATUS;
+    goto cleanup;
+  }
+  assert(rc == 0);
+
+  struct kernel_stat bar_stat_info;
+  rc = sys_stat(bar, &bar_stat_info);
+  if (rc < 0 && errno == EOVERFLOW) {
+    // Bail out since we had an overflow in the stat structure.
+    exit_status = SKIP_TEST_EXIT_STATUS;
+    goto cleanup;
+  }
+  assert(rc == 0);
+
+  // lstat should produce information about a symlink.
+  assert((lstat_info.st_mode & S_IFMT) == S_IFLNK);
+
+  // stat-ing foo and bar should produce the same inode.
+  assert(stat_info.st_ino == bar_stat_info.st_ino);
+
+  // lstat-ing foo should give a different inode than stat-ing foo.
+  assert(stat_info.st_ino != lstat_info.st_ino);
+
+cleanup:
+  sys_unlink(foo);
+  sys_unlink(bar);
+  return exit_status;
+}