# Source: https://docs.datadoghq.com/security/code_security/static_analysis/static_analysis_rules/go-best-practices/non-octal-os-filemode.md

---
title: os.FileMode value appears it should be in octal
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: >-
  Docs > Datadog Security > Code Security > Static Code Analysis (SAST) > SAST
  Rules > os.FileMode value appears it should be in octal
---

# os.FileMode value appears it should be in octal

{% callout %}
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## Metadata{% #metadata %}

**ID:** `go-best-practices/non-octal-os-filemode`

**Language:** Go

**Severity:** Warning

**Category:** Best Practices

## Description{% #description %}

You do not need to convert the string into a slice of bytes to use `Write`, you can just use the string directly.

## Non-Compliant Code Examples{% #non-compliant-code-examples %}

```go
package main

import (
	"log"
	"os"
)

func main() {
	f, err := os.OpenFile("notes.txt", os.O_RDWR|os.O_CREATE, 644)
	if err != nil {
		log.Fatal(err)
	}
	if err := f.Close(); err != nil {
		log.Fatal(err)
	}
}
```

## Compliant Code Examples{% #compliant-code-examples %}

```go
package main

import (
	"log"
	"os"
)

func main() {
	f, err := os.OpenFile("notes.txt", os.O_RDWR|os.O_CREATE, 0644)
	if err != nil {
		log.Fatal(err)
	}
	if err := f.Close(); err != nil {
		log.Fatal(err)
	}
}
```
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