Don't use os_create_anonymous_file outside of wlroots
Use a stripped down version for the backing file in the screenshot
example.
@@ -121,12 +121,32 @@ static const struct wl_registry_listener registry_listener = {
.global_remove = handle_global_remove,
};
+static int backingfile(off_t size) {
+ static char template[] = "/tmp/wlroots-shared-XXXXXX";
+ int fd, ret;
+
+ fd = mkstemp(template);
+ if (fd < 0) {
+ return -1;
+ }
+
+ while ((ret = ftruncate(fd, size)) == EINTR) {}
+ if (ret < 0) {
+ close(fd);
+ return -1;
+ }
+
+ unlink(template);
+ return fd;
+}
+
+
static struct wl_buffer *create_shm_buffer(int width, int height,
void **data_out) {
int stride = width * 4;
int size = stride * height;
- int fd = os_create_anonymous_file(size);
+ int fd = backingfile(size);
if (fd < 0) {
fprintf(stderr, "creating a buffer file for %d B failed: %m\n", size);
return NULL;
