some doc for direct_io and suid_support

src/encryptedfs_fuse3.rs

@@ -147,10 +147,10 @@ impl EncryptedFsFuse3 {
     }
 
     fn creation_mode(&self, mode: u32) -> u16 {
-        if !self.suid_support {
-            (mode & !(libc::S_ISUID | libc::S_ISGID)) as u16
-        } else {
+        if self.suid_support {
             mode as u16
+        } else {
+            (mode & !(libc::S_ISUID | libc::S_ISGID)) as u16
         }
     }
 

src/lib.rs

@@ -65,8 +65,8 @@
 //! - `cipher`: The encryption algorithm to use. Currently, it supports these ciphers [Cipher](Cipher).
 //! - `allow_root`: Allow root to access the file system.
 //! - `allow_other`: Allow other users to access the file system.
-//! - `direct_io`: Use direct I/O.
-//! - `suid_support`: Enable suid support.
+//! - `direct_io`: Use direct I/O (bypass page cache for open files).
+//! - `suid_support`: If it should allow setting `SUID` and `SGID` when files are created. On `false` it will unset those flags when creating files.
 //!
 //! ## Or directly work with [EncryptedFs](EncryptedFs)
 //!

src/main.rs

@@ -146,14 +146,14 @@ fn get_cli_args() -> ArgMatches {
                 .short('i')
                 .action(ArgAction::SetTrue)
                 .requires("mount-point")
-                .help("Mount FUSE with direct IO"),
+                .help("Use direct I/O (bypass page cache for an open file)"),
         )
         .arg(
             Arg::new("suid")
                 .long("suid")
                 .short('s')
                 .action(ArgAction::SetTrue)
-                .help("Enable setuid support when run as root"),
+                .help("If it should allow setting SUID and SGID when files are created. Default is false and it will unset those flags when creating files"),
         )
         .arg(
             Arg::new("change-password")