How to use CopyFile method of osutil Package

Best Syzkaller code snippet using osutil.CopyFile

linux.go

Source:linux.go

...48		return err49	}50	// Write updated kernel config early, so that it's captured on build failures.51	outputConfig := filepath.Join(outputDir, "kernel.config")52	if err := osutil.CopyFile(configFile, outputConfig); err != nil {53		return err54	}55	// We build only bzImage as we currently don't use modules.56	cpu := strconv.Itoa(runtime.NumCPU())57	cmd = osutil.Command("make", "bzImage", "-j", cpu, "CC="+compiler)58	if err := osutil.Sandbox(cmd, true, true); err != nil {59		return err60	}61	cmd.Dir = kernelDir62	if _, err := osutil.Run(time.Hour, cmd); err != nil {63		return extractRootCause(err)64	}65	vmlinux := filepath.Join(kernelDir, "vmlinux")66	outputVmlinux := filepath.Join(outputDir, "obj", "vmlinux")67	if err := os.Rename(vmlinux, outputVmlinux); err != nil {68		return fmt.Errorf("failed to rename vmlinux: %v", err)69	}70	return nil71}72func (linux) createImage(vmType, kernelDir, outputDir, userspaceDir, cmdlineFile, sysctlFile string) error {73	tempDir, err := ioutil.TempDir("", "syz-build")74	if err != nil {75		return err76	}77	defer os.RemoveAll(tempDir)78	scriptFile := filepath.Join(tempDir, "create.sh")79	if err := osutil.WriteExecFile(scriptFile, []byte(createImageScript)); err != nil {80		return fmt.Errorf("failed to write script file: %v", err)81	}82	bzImage := filepath.Join(kernelDir, filepath.FromSlash("arch/x86/boot/bzImage"))83	cmd := osutil.Command(scriptFile, userspaceDir, bzImage)84	cmd.Dir = tempDir85	cmd.Env = append([]string{}, os.Environ()...)86	cmd.Env = append(cmd.Env,87		"SYZ_VM_TYPE="+vmType,88		"SYZ_CMDLINE_FILE="+osutil.Abs(cmdlineFile),89		"SYZ_SYSCTL_FILE="+osutil.Abs(sysctlFile),90	)91	if _, err = osutil.Run(time.Hour, cmd); err != nil {92		return fmt.Errorf("image build failed: %v", err)93	}94	// Note: we use CopyFile instead of Rename because src and dst can be on different filesystems.95	imageFile := filepath.Join(outputDir, "image")96	if err := osutil.CopyFile(filepath.Join(tempDir, "disk.raw"), imageFile); err != nil {97		return err98	}99	keyFile := filepath.Join(outputDir, "key")100	if err := osutil.CopyFile(filepath.Join(tempDir, "key"), keyFile); err != nil {101		return err102	}103	if err := os.Chmod(keyFile, 0600); err != nil {104		return err105	}106	return nil107}108func (linux) clean(kernelDir string) error {109	cpu := strconv.Itoa(runtime.NumCPU())110	cmd := osutil.Command("make", "distclean", "-j", cpu)111	if err := osutil.Sandbox(cmd, true, true); err != nil {112		return err113	}114	cmd.Dir = kernelDir...

android.go

Source:android.go

...78		homeDir := filepath.Join(mountDir, "root")79		if _, err := osutil.RunCmd(time.Hour, homeDir, "./fetchcvd"); err != nil {80			return err81		}82		if err := osutil.CopyFile(bzImage, filepath.Join(homeDir, "bzImage")); err != nil {83			return err84		}85		if err := osutil.CopyFile(vmlinux, filepath.Join(homeDir, "vmlinux")); err != nil {86			return err87		}88		if err := osutil.CopyFile(initramfs, filepath.Join(homeDir, "initramfs.img")); err != nil {89			return err90		}91		return nil92	}); err != nil {93		return details, err94	}95	if err := osutil.CopyFile(vmlinux, filepath.Join(params.OutputDir, "kernel")); err != nil {96		return details, err97	}98	if err := osutil.CopyFile(initramfs, filepath.Join(params.OutputDir, "initrd")); err != nil {99		return details, err100	}101	details.Signature, err = elfBinarySignature(vmlinux)102	if err != nil {103		return details, fmt.Errorf("failed to generate signature: %s", err)104	}105	return details, nil106}107func (a android) clean(kernelDir, targetArch string) error {108	return osutil.RemoveAll(filepath.Join(kernelDir, "out"))109}...

CopyFile

Using AI Code Generation

1import (2func main() {3    currentUser, _ := user.Current()4    file, err := os.Create(homeDir + "/test.txt")5    if err != nil {6        fmt.Println("Error creating file: ", err)7    }8    _, err = file.WriteString("Hello World!")9    if err != nil {10        fmt.Println("Error writing to file: ", err)11    }12    err = file.Close()13    if err != nil {14        fmt.Println("Error closing file: ", err)15    }16    file, err = os.Create(homeDir + "/test2.txt")17    if err != nil {18        fmt.Println("Error creating file: ", err)19    }20    err = file.Close()21    if err != nil {22        fmt.Println("Error closing file: ", err)23    }24    err = utils.CopyFile(homeDir+"/test2.txt", homeDir+"/test.txt")25    if err != nil {26        fmt.Println("Error copying file: ", err)27    }28    err = os.Remove(homeDir + "/test.txt")29    if err != nil {30        fmt.Println("Error deleting file: ", err)31    }32    err = os.Remove(homeDir + "/test2.txt")33    if err != nil {34        fmt.Println("Error deleting file: ", err)35    }36}37import (38func main() {39    currentUser, _ := user.Current()

CopyFile

Using AI Code Generation

1import (2func main() {3 err := utils.CopyFile("1.go", "2.go")4 if err != nil {5 fmt.Println(err)6 }7}

CopyFile

Using AI Code Generation

1import (2func main() {3    err := osutil.CopyFile("C:\\1.txt", "C:\\2.txt")4    if err != nil {5        fmt.Println(err)6    }7}

CopyFile

Using AI Code Generation

1import (2func main() {3	err := osutil.CopyFile("source.txt", "destination.txt")4	if err != nil {5		fmt.Println(err)6	}7	fmt.Println("File copied successfully")8}

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