[PATCH v2] io/tst-stat.c: Use a temporary directory for symlink test

[H.J. Lu]

Call support_create_temp_directory to create a temporary directory for
symlink test, instead of a fixed file in the glibc source tree, to avoid
the race condition when there are more than one glibc tests running at the
same time with the same glibc source tree.  This fixes BZ #33178.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
---
 io/tst-stat.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/io/tst-stat.c b/io/tst-stat.c
index aeea435ca1..5e0bfcc30e 100644
--- a/io/tst-stat.c
+++ b/io/tst-stat.c
@@ -27,6 +27,7 @@
 #include <sys/sysmacros.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <stdlib.h>
 
 static void
 stat_check (int fd, const char *path, struct stat *st)
@@ -78,7 +79,8 @@ static int
 do_test (void)
 {
   char *path;
-  const char *linkame = "tst-fstat.linkname";
+  char *tempdir = support_create_temp_directory ("tst-stat-");
+  char *linkname = xasprintf ("%s/tst-fstat.linkname", tempdir);
   int fd = create_temp_file ("tst-fstat.", &path);
   TEST_VERIFY_EXIT (fd >= 0);
   support_write_file_string (path, "abc");
@@ -122,9 +124,12 @@ do_test (void)
 	}
     }
 
-  TEST_COMPARE (symlink ("tst-fstat.target", linkame), 0);
-  add_temp_file (linkame);
-  fstatat_link (linkame, &st);
+  TEST_COMPARE (symlink ("tst-fstat.target", linkname), 0);
+  add_temp_file (linkname);
+  fstatat_link (linkname, &st);
+
+  free (linkname);
+  free (tempdir);
 
   return 0;
 }
-- 
2.50.1