From 23b1f712a8491d22f242901c8f9c6a7de7854492 Mon Sep 17 00:00:00 2001
From: Kapil Sharma <ks3913688@gmail.com>
Date: Tue, 7 May 2024 11:05:27 +0530
Subject: [PATCH] Delete events/syscall/utils_linux.go

Signed-off-by: Kapil Sharma <ks3913688@gmail.com>
---
 events/syscall/utils_linux.go | 116 ----------------------------------
 1 file changed, 116 deletions(-)
 delete mode 100644 events/syscall/utils_linux.go

diff --git a/events/syscall/utils_linux.go b/events/syscall/utils_linux.go
deleted file mode 100644
index 28320209..00000000
--- a/events/syscall/utils_linux.go
+++ /dev/null
@@ -1,116 +0,0 @@
-//go:build linux
-// +build linux
-
-// SPDX-License-Identifier: Apache-2.0
-/*
-Copyright (C) 2023 The Falco Authors.
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-    http://www.apache.org/licenses/LICENSE-2.0
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package syscall
-
-import (
-	"os"
-	"os/exec"
-	"os/user"
-	"path/filepath"
-	"strconv"
-	sys "syscall"
-
-	"github.com/falcosecurity/event-generator/events"
-	"golang.org/x/sys/unix"
-)
-
-// becameUser calls looks up the username UID then calls "setuid" syscall.
-//
-// IMPORTANT NOTE: the behavior is unpredicatable when used with goroutes.
-// On linux, setuid only affects the current thread, not the process.
-// Thus, becameUser may or not affect other goroutines.
-func becameUser(h events.Helper, username string) error {
-	h.Log().WithField("user", username).
-		Info("became user")
-
-	u, err := user.Lookup(username)
-	if err != nil {
-		return err
-	}
-
-	uid, err := strconv.Atoi(u.Uid)
-	if err != nil {
-		return err
-	}
-
-	h.Log().WithField("uid", sys.Getuid()).
-		WithField("euid", sys.Geteuid()).Debug("pre setuid")
-
-	uuid := uint(uid)
-	_, _, errno := unix.RawSyscall(unix.SYS_SETUID, uintptr(uuid), 0, 0)
-
-	h.Log().WithError(errno).
-		WithField("uid", sys.Getuid()).
-		WithField("euid", sys.Geteuid()).Debug("post setuid")
-
-	if errno != 0 {
-		return errno
-	}
-	return nil
-}
-
-func runAsUser(h events.Helper, username string, cmdName string, cmdArgs ...string) error {
-	h.Log().WithField("user", username).
-		WithField("cmdName", cmdName).
-		WithField("cmdArgs", cmdArgs).
-		Info("run command as another user")
-
-	u, err := user.Lookup(username)
-	if err != nil {
-		return err
-	}
-
-	uid, err := strconv.Atoi(u.Uid)
-	if err != nil {
-		return err
-	}
-
-	gid, err := strconv.Atoi(u.Gid)
-	if err != nil {
-		return err
-	}
-
-	cmd := exec.Command(cmdName, cmdArgs...)
-	cmd.SysProcAttr = &sys.SysProcAttr{}
-	cmd.SysProcAttr.Credential = &sys.Credential{
-		Uid: uint32(uid),
-		Gid: uint32(gid),
-	}
-	return cmd.Run()
-}
-
-// Creates a temp directory and .ssh directory inside it.
-func createSshDirectoryUnderHome() (string, func(), error) {
-	// Creates temporary data for testing.
-	var (
-		tempDirectoryName string
-		err               error
-	)
-	// Loop until a unique temporary directory is successfully created
-	if tempDirectoryName, err = os.MkdirTemp("/home", "falco-event-generator-"); err != nil {
-		return "", func() {}, err
-	}
-
-	// Create the SSH directory
-	sshDir := filepath.Join(tempDirectoryName, ".ssh")
-	if err := os.Mkdir(sshDir, 0755); err != nil {
-		return "", func() { _ = os.RemoveAll(tempDirectoryName) }, err
-	}
-
-	return sshDir, func() { _ = os.RemoveAll(tempDirectoryName) }, nil
-}