Avoid running some tests if the file system does not support holes

Otherwise, these tests fills up the entire disk (or just run very
slowly and eventually time out).

2 files changed, 10 insertions, 0 deletions

diff --git a/misc/tst-preadvwritev-common.c b/misc/tst-preadvwritev-common.c
index b59a3de465..4a5e53a140 100644
--- a/misc/tst-preadvwritev-common.c
+++ b/misc/tst-preadvwritev-common.c
@@ -17,6 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <array_length.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <errno.h>
@@ -26,10 +27,12 @@
 
 #include <support/check.h>
 #include <support/temp_file.h>
+#include <support/support.h>
 #include <support/xunistd.h>
 
 static char *temp_filename;
 static int temp_fd;
+static bool temp_fd_supports_holes;
 
 static int do_test (void);
 
@@ -39,6 +42,7 @@ do_prepare (int argc, char **argv)
   temp_fd = create_temp_file ("tst-preadvwritev.", &temp_filename);
   if (temp_fd == -1)
     FAIL_EXIT1 ("cannot create temporary file");
+  temp_fd_supports_holes = support_descriptor_supports_holes (temp_fd);
 }
 #define PREPARE do_prepare
 
diff --git a/misc/tst-preadvwritev64.c b/misc/tst-preadvwritev64.c
index b718da6be5..451d03e4a8 100644
--- a/misc/tst-preadvwritev64.c
+++ b/misc/tst-preadvwritev64.c
@@ -26,6 +26,12 @@ do_test (void)
 
   ret = do_test_with_offset (0);
 
+  if (!temp_fd_supports_holes)
+    {
+      puts ("warning: partial test due to lack of support for holes");
+      return ret;
+    }
+
   /* Create a sparse file larger than 4GB to check if offset is handled
      correctly in p{write,read}v64. */
   off_t base_offset = UINT32_MAX + 2048LL;