lib9p

commit 13f386e125c8acc6b8751ff0dd33903e3b7a2b49
parent d90eb452034a44596173aec28deca11a49199ebb
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Tue, 12 Sep 2023 07:26:57 +0900

implement chgrp

Diffstat:
M
diskfs/stat.go
 | 
22
++++++++++++++++++++++
M
testdir/a
 | 
2
--
M
testdir/c
 | 
1
-

3 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/diskfs/stat.go b/diskfs/stat.go
@@ -47,6 +47,7 @@ func fiStat(pool *QidPool, id fileID, info fs.FileInfo) *lib9p.Stat {
 	}
 }
 
+// TODO: when error occur, file stat should be restored.
 func (f *File) WStat(s *lib9p.Stat) error {
 	fi, err := f.Stat()
 	if err != nil {
@@ -76,7 +77,28 @@ func (f *File) WStat(s *lib9p.Stat) error {
 			return fmt.Errorf("chtimes: %v", err)
 		}
 	}
+
 	if s.Gid != oldStat.Gid {
+		group, err := user.LookupGroup(s.Gid)
+		if err != nil {
+			return fmt.Errorf("lookupgroup: %v", err)
+		}
+		usr, err := user.Lookup(oldStat.Uid)
+		if err != nil {
+			return fmt.Errorf("lookup user: %v", err)
+		}
+		u, err := strconv.Atoi(usr.Uid)
+		if err != nil {
+			return fmt.Errorf("convert uid: %v", err)
+		}
+		g, err := strconv.Atoi(group.Gid)
+		if err != nil {
+			return fmt.Errorf("convert gid: %v", err)
+		}
+
+		if err := f.file.Chown(u, g); err != nil {
+			return fmt.Errorf("chown: %v", err)
+		}
 		return fmt.Errorf("chgroup unimplemented")
 	}
 
diff --git a/testdir/a b/testdir/a
@@ -1,2 +0,0 @@
-a
-unko
diff --git a/testdir/c b/testdir/c
@@ -1 +0,0 @@
-c