loader: actually stat something that has some chance of existing. (v2)

FindModuleInSubdir seems to expect a / at the end of the subdir its
finding for, so we add the / early, the stat will fail if its
not a subdir, I'm leaving the S_ISDIR in just in case there is another
reason it could return 0. This does look a bit silly in strace
but it seems to work fine.

I have a very intermittent issue where drivers loses its / that
I've been seeing on/off for a while, this may or may not fix it.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/hw/xfree86/loader/loadmod.c b/hw/xfree86/loader/loadmod.c
index 0b220f1b6..5b175a546 100644
--- a/hw/xfree86/loader/loadmod.c
+++ b/hw/xfree86/loader/loadmod.c
@@ -399,8 +399,11 @@ FindModuleInSubdir(const char *dirpath, const char *module)
     while ((direntry = readdir(dir))) {
         if (direntry->d_name[0] == '.')
             continue;
-        if ((stat(direntry->d_name, &stat_buf) == 0) && S_ISDIR(stat_buf.st_mode)) {
-            snprintf(tmpBuf, PATH_MAX, "%s/%s", dirpath, direntry->d_name);
+        snprintf(tmpBuf, PATH_MAX, "%s%s/", dirpath, direntry->d_name);
+	/* the stat with the appended / fails for normal files,
+	   and works for sub dirs fine, looks a bit strange in strace
+	   but does seem to work */
+        if ((stat(tmpBuf, &stat_buf) == 0) && S_ISDIR(stat_buf.st_mode)) {
             if ((ret = FindModuleInSubdir(tmpBuf, module)))
                 break;
             continue;