1 files changed, 53 insertions, 0 deletions
diff --git a/test/sanitizer_common/TestCases/Posix/fseek.cpp b/test/sanitizer_common/TestCases/Posix/fseek.cpp
new file mode 100644
index 000000000..26f3b849f
--- /dev/null
+++ b/test/sanitizer_common/TestCases/Posix/fseek.cpp
@@ -0,0 +1,53 @@
+// RUN: %clangxx -O0 -g %s -o %t && %run %t 2>&1 | FileCheck %s
+//
+// UNSUPPORTED: linux, darwin, solaris
+
+#include <assert.h>
+#include <inttypes.h>
+#include <stdio.h>
+
+int main(void) {
+  printf("fseek\n");
+
+  FILE *fp = fopen("/etc/fstab", "r");
+  assert(fp);
+
+  int rv = fseek(fp, 10, SEEK_SET);
+  assert(!rv);
+
+  printf("position: %ld\n", ftell(fp));
+
+  rewind(fp);
+
+  printf("position: %ld\n", ftell(fp));
+
+  rv = fseeko(fp, 15, SEEK_SET);
+  assert(!rv);
+
+  printf("position: %" PRIuMAX "\n", (uintmax_t)ftello(fp));
+
+  fpos_t pos;
+  rv = fgetpos(fp, &pos);
+  assert(!rv);
+
+  rewind(fp);
+
+  printf("position: %" PRIuMAX "\n", (uintmax_t)ftello(fp));
+
+  rv = fsetpos(fp, &pos);
+  assert(!rv);
+
+  printf("position: %" PRIuMAX "\n", (uintmax_t)ftello(fp));
+
+  rv = fclose(fp);
+  assert(!rv);
+
+  // CHECK: fseek
+  // CHECK: position: 10
+  // CHECK: position: 0
+  // CHECK: position: 15
+  // CHECK: position: 0
+  // CHECK: position: 15
+
+  return 0;
+}