From 5404bda3decb102dba19ccbbf329e2c4a5669ff0 Mon Sep 17 00:00:00 2001
From: Maxim Slipenko <no-reply@maxim.slipenko.com>
Date: Sun, 6 Apr 2025 17:22:06 +0300
Subject: [PATCH] fix: map gid instead uid

---
 fakeroot.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fakeroot.go b/fakeroot.go
index 37a755a..4c1f9e0 100644
--- a/fakeroot.go
+++ b/fakeroot.go
@@ -27,6 +27,7 @@ func Command(name string, arg ...string) (*exec.Cmd, error) {
 // registered in the command.
 func Apply(cmd *exec.Cmd) error {
 	uid := os.Getuid()
+	gid := os.Getgid()
 
 	// If the user is already root, there's no need for fakeroot
 	if uid == 0 {
@@ -59,7 +60,7 @@ func Apply(cmd *exec.Cmd) error {
 
 	cmd.SysProcAttr.GidMappings = append(cmd.SysProcAttr.GidMappings, syscall.SysProcIDMap{
 		ContainerID: 0,
-		HostID:      uid,
+		HostID:      gid,
 		Size:        1,
 	})