[Libguestfs] [PATCH] tests: regressions: make test-big-heap use a temporary empty file

Newer versions of qemu use file locking for the images by default, and apparently that does not work with /dev/null. Since this test just calls qemu-img to get the format of an empty image, create a temporary one instead. --- tests/regressions/test-big-heap.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/tests/regressions/test-big-heap.c b/tests/regressions/test-big-heap.c index b841fba70..5c0948252 100644 --- a/tests/regressions/test-big-heap.c +++ b/tests/regressions/test-big-heap.c @@ -31,6 +31,7 @@ #include <stdlib.h> #include <string.h> #include <assert.h> +#include <unistd.h> #include "guestfs.h" #include "guestfs-utils.h" @@ -41,6 +42,8 @@ main (int argc, char *argv[]) const char *s; guestfs_h *g; char *mem, *fmt; + char tmpfile[32]; + int tmpfilefd; /* Allow the test to be skipped. */ s = getenv ("SKIP_TEST_BIG_HEAP"); @@ -50,6 +53,8 @@ main (int argc, char *argv[]) exit (77); } + snprintf (tmpfile, sizeof tmpfile, "test-big-heap.XXXXXX"); + /* Make sure we're using > 1GB in the main process. This test won't * work on 32 bit platforms, because we can't allocate 2GB of * contiguous memory. Therefore skip the test if the calloc call @@ -68,10 +73,19 @@ main (int argc, char *argv[]) exit (77); } + /* Create an empty temporary file for qemu-img. */ + tmpfilefd = mkstemp (tmpfile); + if (tmpfilefd == -1) { + fprintf (stderr, "%s: mkstemp failed: %m\n", argv[0]); + exit (EXIT_FAILURE); + } + close (tmpfilefd); + g = guestfs_create (); /* Do something which forks qemu-img subprocess. */ - fmt = guestfs_disk_format (g, "/dev/null"); + fmt = guestfs_disk_format (g, tmpfile); + unlink (tmpfile); if (fmt == NULL) { /* Test failed. */ fprintf (stderr, "%s: unexpected failure of test, see earlier messages\n", -- 2.14.3