Respect setgid bit on directories when using --create-as-user

Signed-off-by: Jonathan Dieter <jdieter@lesbg.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/src/bindfs.c b/src/bindfs.c
index 34067eb..754bc0e 100644
--- a/src/bindfs.c
+++ b/src/bindfs.c
@@ -52,6 +52,7 @@
 #include <errno.h>
 #include <getopt.h>
 #include <assert.h>
+#include <libgen.h>
 #include <pwd.h>
 #include <grp.h>
 #include <limits.h>
@@ -294,10 +295,19 @@ static void chown_new_file(const char *path, struct fuse_context *fc, int (*chow
 {
     uid_t file_owner;
     gid_t file_group;
-    
+
     if (settings.create_policy == CREATE_AS_USER) {
+        char *path_copy, *dir_path;
+        struct stat stbuf;
+
         file_owner = fc->uid;
         file_group = fc->gid;
+
+        path_copy = strdup(path);
+        dir_path = dirname(path_copy);
+        if (lstat(dir_path, &stbuf) != -1 && stbuf.st_mode & S_ISGID)
+            file_group = -1;
+        free(path_copy);
     } else {
         file_owner = -1;
         file_group = -1;