From 777663953382925c7403f0560c28ec9bbd14d7be Mon Sep 17 00:00:00 2001
From: y <tofik.sonono@intel.com>
Date: Mon, 14 Nov 2022 11:55:39 +0100
Subject: libfuse custom communication interface

libfuse can now be used without having a mount interface.
---
 include/fuse_lowlevel.h | 19 +++++++++++++++++++
 lib/fuse_lowlevel.c     |  4 ++++
 lib/fuse_versionscript  |  1 +
 3 files changed, 24 insertions(+)

diff --git a/include/fuse_lowlevel.h b/include/fuse_lowlevel.h
index 53f0fcf..955482c 100644
--- a/include/fuse_lowlevel.h
+++ b/include/fuse_lowlevel.h
@@ -1954,6 +1954,25 @@ struct fuse_session *fuse_session_new(struct fuse_args *args,
 				      const struct fuse_lowlevel_ops *op,
 				      size_t op_size, void *userdata);
 
+/**
+ * Set a file descriptor for the session.
+ *
+ * This function can be used if you want to have a custom communication
+ * interface instead of using a mountpoint. In practice, this means that instead
+ * of calling fuse_session_mount() and fuse_session_unmount(), one could call
+ * fuse_custom_session_fd() where fuse_session_mount() would have otherwise been
+ * called.
+ *
+ * This function does not open or close any file descriptors, meaning it is the
+ * responsibility of the caller to provide a valid file descriptor, such as a
+ * accepted socket. It is also the responsibility to close the socket.
+ *
+ * @param se session object
+ * @param fd file descriptor for the session
+ *
+ **/
+void fuse_custom_session_fd(struct fuse_session *se, int fd);
+
 /**
  * Mount a FUSE file system.
  *
diff --git a/lib/fuse_lowlevel.c b/lib/fuse_lowlevel.c
index e82cd9e..b6ffbd9 100644
--- a/lib/fuse_lowlevel.c
+++ b/lib/fuse_lowlevel.c
@@ -3009,6 +3009,10 @@ out1:
 	return NULL;
 }
 
+void fuse_custom_session_fd(struct fuse_session *se, int fd) {
+	se->fd = fd;
+}
+
 int fuse_session_mount(struct fuse_session *se, const char *mountpoint)
 {
 	int fd;
diff --git a/lib/fuse_versionscript b/lib/fuse_versionscript
index 7e50e75..f57c505 100644
--- a/lib/fuse_versionscript
+++ b/lib/fuse_versionscript
@@ -39,6 +39,7 @@ FUSE_3.0 {
 		fuse_session_new;
 		fuse_main_real;
 		fuse_mount;
+		fuse_custom_session_fd;
 		fuse_session_mount;
 		fuse_new;
 		fuse_opt_insert_arg;
-- 
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