cursor: ignore posix_fallocate in shm_pool_resize if not supported by FS

Signed-off-by: Jan Beich <jbeich@FreeBSD.org>

1 files changed, 8 insertions, 4 deletions

diff --git a/cursor/wayland-cursor.c b/cursor/wayland-cursor.c
index d40c5c8..ca5be8d 100644
--- a/cursor/wayland-cursor.c
+++ b/cursor/wayland-cursor.c
@@ -83,15 +83,19 @@ err_free:
 static int
 shm_pool_resize(struct shm_pool *pool, int size)
 {
-	if (ftruncate(pool->fd, size) < 0)
-		return 0;
-
 #ifdef HAVE_POSIX_FALLOCATE
+	/* 
+	 * Filesystems that do support fallocate will return EINVAL or
+	 * EOPNOTSUPP. In this case we need to fall back to ftruncate
+	 */
 	errno = posix_fallocate(pool->fd, 0, size);
-	if (errno != 0)
+	if (errno != 0 && errno != EINVAL && errno != EOPNOTSUPP)
 		return 0;
 #endif
 
+	if (ftruncate(pool->fd, size) < 0)
+		return 0;
+
 	wl_shm_pool_resize(pool->pool, size);
 
 	munmap(pool->data, pool->size);