adding kernel 5+ fix and fuse 3+ fix

Author: pcloudcom

pCloudCC/lib/pclsync/pfs.c

@@ -70,6 +70,10 @@ typedef off_t fuse_off_t;
 #include <sys/mount.h>
 #endif
 
+#if defined(P_OS_LINUX)
+#include <sys/mount.h>
+#endif
+
 #if IS_DEBUG
 #define psync_fs_set_thread_name() do {psync_thread_name=__FUNCTION__;} while (0)
 #else
@@ -2979,7 +2983,9 @@ static void *psync_fs_init(struct fuse_conn_info *conn){
   conn->want|=FUSE_CAP_BIG_WRITES;
 #endif
   conn->max_readahead=1024*1024;
+#if !defined(P_OS_LINUX)
   conn->max_write=FS_MAX_WRITE;
+#endif
   if (psync_start_callback)
     psync_timer_register(psync_fs_start_callback_timer, 1, NULL);
   return 0;
@@ -3080,8 +3086,10 @@ void psync_fs_refresh_folder(psync_folderid_t folderid){
   else{
     debug(D_NOTICE, "creating fake file %s", fpath);
     fd=psync_file_open(fpath, P_O_WRONLY, P_O_CREAT);
-    if (fd!=INVALID_HANDLE_VALUE)
+    if (fd!=INVALID_HANDLE_VALUE){
       psync_file_close(fd);
+      psync_file_delete(fpath);
+    }
   }
   psync_free(fpath);
 }
@@ -3196,6 +3204,13 @@ static void psync_fs_do_stop(void){
     unmount(psync_current_mountpoint, MNT_FORCE);
     debug(D_NOTICE, "unmount exited");
 #endif
+
+#if defined(P_OS_LINUX)
+	char *mp;
+	mp = psync_fuse_get_mountpoint();
+	fuse_unmount(mp, psync_fuse_channel);
+#endif
+
     debug(D_NOTICE, "running fuse_exit");
     fuse_exit(psync_fuse);
     started=2;
@@ -3305,6 +3320,29 @@ static void psync_fuse_thread(){
   pthread_mutex_unlock(&start_mutex);
 }
 
+// Returns true if FUSE 3 is installed on the user's machine.
+// Returns false if FUSE version is less than 3.
+static char is_fuse3_installed_on_system()
+{
+  // Assuming that fusermount3 is only available on FUSE 3.
+  FILE* pipe = popen("which fusermount3", "r");
+
+  if (!pipe) {
+    return 0;
+  }
+
+  char output[1024];
+  memset(output, 0, sizeof(output));
+
+  char* o = fgets(output, sizeof(output), pipe);
+
+  pclose(pipe);
+  size_t outlen = strlen(output);
+
+  return outlen > 0;
+}
+
+
 static int psync_fs_do_start(){
   char *mp;
   struct fuse_operations psync_oper;
@@ -3318,7 +3356,9 @@ static int psync_fs_do_start(){
   fuse_opt_add_arg(&args, "-oauto_unmount");
 //  fuse_opt_add_arg(&args, "-ouse_ino");
   fuse_opt_add_arg(&args, "-ofsname="DEFAULT_FUSE_MOUNT_POINT".fs");
-  fuse_opt_add_arg(&args, "-ononempty");
+  if (!is_fuse3_intalled_on_system()) {
+    fuse_opt_add_arg(&args, "-ononempty");
+  }
   fuse_opt_add_arg(&args, "-ohard_remove");
 //  fuse_opt_add_arg(&args, "-d");
 #endif
@@ -3479,3 +3519,4 @@ int psync_fs_remount(){
   else
     return 0;
 }
+