test-sigbus: use posix_fallocate rather than fallocate

Some filesystems do not support fallocate, so we need to fall back on
something like posix_fallocate.

Closes #5833

diff --git a/src/test/test-sigbus.c b/src/test/test-sigbus.c
index 02b8e24..2c8fc1c 100644 (file)
--- a/src/test/test-sigbus.c
+++ b/src/test/test-sigbus.c
@@ -38,7 +38,7 @@ int main(int argc, char *argv[]) {
 
         assert_se((fd = mkostemp(template, O_RDWR|O_CREAT|O_EXCL)) >= 0);
         assert_se(unlink(template) >= 0);
-        assert_se(fallocate(fd, 0, 0, page_size() * 8) >= 0);
+        assert_se(posix_fallocate(fd, 0, page_size() * 8) >= 0);
 
         p = mmap(NULL, page_size() * 16, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
         assert_se(p != MAP_FAILED);