entry: Add set_mode method

src/archive.rs

@@ -352,6 +352,7 @@ impl<'a> EntriesFields<'a> {
             long_linkname: None,
             pax_extensions: None,
             mask: self.archive.inner.mask,
+            mode: None,
             unpack_xattrs: self.archive.inner.unpack_xattrs,
             preserve_permissions: self.archive.inner.preserve_permissions,
             preserve_mtime: self.archive.inner.preserve_mtime,

src/entry.rs

@@ -32,6 +32,7 @@ pub struct EntryFields<'a> {
     pub long_linkname: Option<Vec<u8>>,
     pub pax_extensions: Option<Vec<u8>>,
     pub mask: u32,
+    pub mode: Option<u32>,
     pub header: Header,
     pub size: u64,
     pub header_pos: u64,
@@ -246,6 +247,13 @@ impl<'a, R: Read> Entry<'a, R> {
         self.fields.mask = mask;
     }
 
+    /// Set the permission bits when unpacking this entry.
+    ///
+    /// The mode is unchanged by default.
+    pub fn set_mode(&mut self, mode: u32) {
+        self.fields.mode = Some(mode);
+    }
+
     /// Indicate whether extended file attributes (xattrs on Unix) are preserved
     /// when unpacking this entry.
     ///
@@ -467,13 +475,16 @@ impl<'a> EntryFields<'a> {
             mask: u32,
             perms: bool,
             ownerships: bool,
+            mode: Option<u32>,
         ) -> io::Result<()> {
             // ownerships need to be set first to avoid stripping SUID bits in the permissions ...
             if ownerships {
                 set_ownerships(dst, &f, header.uid()?, header.gid()?)?;
             }
             // ... then set permissions, SUID bits set here is kept
-            if let Ok(mode) = header.mode() {
+            if let Some(mode) = mode {
+                set_perms(dst, f, mode, mask, perms)?;
+            } else if let Ok(mode) = header.mode() {
                 set_perms(dst, f, mode, mask, perms)?;
             }
 
@@ -504,6 +515,7 @@ impl<'a> EntryFields<'a> {
                 self.mask,
                 self.preserve_permissions,
                 self.preserve_ownerships,
+                self.mode,
             )?;
             return Ok(Unpacked::__Nonexhaustive);
         } else if kind.is_hard_link() || kind.is_symlink() {
@@ -627,6 +639,7 @@ impl<'a> EntryFields<'a> {
                 self.mask,
                 self.preserve_permissions,
                 self.preserve_ownerships,
+                self.mode,
             )?;
             return Ok(Unpacked::__Nonexhaustive);
         }
@@ -703,6 +716,7 @@ impl<'a> EntryFields<'a> {
             self.mask,
             self.preserve_permissions,
             self.preserve_ownerships,
+            self.mode,
         )?;
         if self.unpack_xattrs {
             set_xattrs(self, dst)?;