[Bf-blender-cvs] [f34cceaceb3] wayland: GHOST/wayland: create temporary file manually for older kernel versions

[Christian Rauch]

Commit: f34cceaceb364d354672d1bce6d97f943eccc53d
Author: Christian Rauch
Date:   Mon Jul 12 23:28:41 2021 +0100
Branches: wayland
https://developer.blender.org/rBf34cceaceb364d354672d1bce6d97f943eccc53d

GHOST/wayland: create temporary file manually for older kernel versions

===================================================================

M	intern/ghost/intern/GHOST_SystemWayland.cpp

===================================================================

diff --git a/intern/ghost/intern/GHOST_SystemWayland.cpp b/intern/ghost/intern/GHOST_SystemWayland.cpp
index 75a80de983d..4ed8241d5b1 100644
--- a/intern/ghost/intern/GHOST_SystemWayland.cpp
+++ b/intern/ghost/intern/GHOST_SystemWayland.cpp
@@ -49,6 +49,7 @@
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <unistd.h>
+#include <linux/version.h>
 
 #include <cstring>
 
@@ -1804,8 +1805,22 @@ GHOST_TSuccess GHOST_SystemWayland::setCustomCursorShape(uint8_t *bitmap,
   static const int32_t stride = sizex * 4; /* ARGB */
   cursor->file_buffer->size = size_t(stride * sizey);
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
   const int fd = memfd_create("blender-cursor-custom", MFD_CLOEXEC | MFD_ALLOW_SEALING);
   fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK);
+#else
+  char *tmpname;
+  asprintf(&tmpname, "%s/%s", getenv("XDG_RUNTIME_DIR"), "blender-XXXXXX");
+  const int fd = mkostemp(tmpname, O_CLOEXEC);
+  if (fd >= 0) {
+    unlink(tmpname);
+  }
+  free(tmpname);
+  if (fd < 0) {
+    return GHOST_kFailure;
+  }
+#endif
+
   posix_fallocate(fd, 0, int32_t(cursor->file_buffer->size));
 
   cursor->file_buffer->data = mmap(