Re: [PATC 7/9] Skipping drm build, unsupported

[Gerd Hoffmann <kraxel@redhat.com>]

> > Ah, that is the problem.  Yes, DT_CHR is an non-posix optimization which
> > allows to get the file type directly, without another round-trip to the
> > kernel.  If that isn't available you can stat() the file and check
> > ((st_mode & S_IFMT) == S_IFCHR) instead.
> 
> Even when d_type and DT_CHR is available, there are filesystems where the
> Linux kernel reports d_type of DT_UNKNOWN, and where you are best having
> that code also falling back to an fstat().

Given this isn't perforance critical at all it is probably simplest to
avoid non-portable d_type altogether and just to the fstat
unconditionally.

David, does that work for haiku?

take care,
  Gerd

diff --git a/util/drm.c b/util/drm.c
index a23ff2453826..a1d3520d00f2 100644
--- a/util/drm.c
+++ b/util/drm.c
@@ -24,6 +24,7 @@ int qemu_drm_rendernode_open(const char *rendernode)
 {
     DIR *dir;
     struct dirent *e;
+    struct stat st;
     int r, fd;
     char *p;
 
@@ -38,10 +39,6 @@ int qemu_drm_rendernode_open(const char *rendernode)
 
     fd = -1;
     while ((e = readdir(dir))) {
-        if (e->d_type != DT_CHR) {
-            continue;
-        }
-
         if (strncmp(e->d_name, "renderD", 7)) {
             continue;
         }
@@ -53,6 +50,12 @@ int qemu_drm_rendernode_open(const char *rendernode)
             g_free(p);
             continue;
         }
+        fstat(r, &st);
+        if ((st.st_mode & S_IFMT) != S_IFCHR) {
+            close(r);
+            g_free(p);
+            continue;
+        }
         fd = r;
         g_free(p);
         break;