Initial QSfera import

Server/vendor/github.com/gookit/goutil/sysutil/user_nonwin.go

@@ -0,0 +1,42 @@
+//go:build !windows
+
+package sysutil
+
+import (
+	"os"
+	"syscall"
+
+	"github.com/gookit/goutil/strutil"
+)
+
+// IsAdmin Determine whether the current user is an administrator(root)
+func IsAdmin() bool {
+	return os.Getuid() == 0
+}
+
+// ChangeUserByName change work user by new username.
+func ChangeUserByName(newUname string) error {
+	u := MustFindUser(newUname)
+	// syscall.Setlogin(newUname)
+	return ChangeUserUIDGid(strutil.MustInt(u.Uid), strutil.MustInt(u.Gid))
+}
+
+// ChangeUserUidGid change work user by new username uid,gid
+//
+// Deprecated: use ChangeUserUIDGid instead
+func ChangeUserUidGid(newUID int, newGid int) error {
+	return ChangeUserUIDGid(newUID, newGid)
+}
+
+// ChangeUserUIDGid change work user by new username uid,gid
+func ChangeUserUIDGid(newUID int, newGid int) (err error) {
+	if newUID > 0 {
+		err = syscall.Setuid(newUID)
+
+		// update group id
+		if err == nil && newGid > 0 {
+			err = syscall.Setgid(newGid)
+		}
+	}
+	return
+}