wip

internal/utils/cmd.go

@@ -80,7 +80,6 @@ func DropCapsToAlrUser() error {
 	return nil
 }
 
-// Returns cli.Exit to
 func ExitIfCantDropCapsToAlrUser() cli.ExitCoder {
 	err := DropCapsToAlrUser()
 	if err != nil {
@@ -95,3 +94,63 @@ func ExitIfNotRoot() error {
 	}
 	return nil
 }
+
+func EnuseIsAlrUser() error {
+	uid, gid, err := GetUidGidAlrUser()
+	if err != nil {
+		return err
+	}
+	newUid := syscall.Getuid()
+	if newUid != uid {
+		return errors.New("new uid don't matches requested")
+	}
+	newGid := syscall.Getgid()
+	if newGid != gid {
+		return errors.New("new gid don't matches requested")
+	}
+	return nil
+}
+
+func EnuseIsWheelMember() error {
+	currentUser, err := user.Current()
+	if err != nil {
+		return err
+	}
+
+	group, err := user.LookupGroup("wheel")
+	if err != nil {
+		return err
+	}
+
+	groups, err := currentUser.GroupIds()
+	if err != nil {
+		return err
+	}
+
+	for _, gid := range groups {
+		if gid == group.Gid {
+			return nil
+		}
+	}
+	return errors.New("looks like is not wheel member")
+}
+
+func EscalateToRootGid() error {
+	return syscall.Setgid(0)
+}
+
+func EscalateToRootUid() error {
+	return syscall.Setuid(0)
+}
+
+func EscalateToRoot() error {
+	err := EscalateToRootUid()
+	if err != nil {
+		return err
+	}
+	err = EscalateToRootGid()
+	if err != nil {
+		return err
+	}
+	return nil
+}

internal/utils/utils.go

@@ -0,0 +1,23 @@
+// ALR - Any Linux Repository
+// Copyright (C) 2025 Евгений Храмов
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package utils
+
+import "golang.org/x/sys/unix"
+
+func NoNewPrivs() error {
+	return unix.Prctl(unix.PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0)
+}