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Golang os.O_CREATE Constant with Examples

Golang | os.O_CREATE Constant: Here, we are going to learn about the O_CREATE constant of the os package with its usages, syntax, and examples.
Submitted by IncludeHelp, on October 23, 2021

os.O_CREATE

In the Go language, the os package provides a platform-independent interface to operating system (Unix-like) functionality. The O_CREATE constant is used to create a file if none exists.

The value of the O_CREATE constant is 64.

Syntax:

O_CREATE int

Implementation in the package source code:

const O_CREATE int = syscall.O_CREATE

Parameter(s):

  • None

Return Value:

The return type of the os.O_CREATE constant is an int, it returns 64 i.e., the value of the O_CREATE constant is 64.

Example 1:

// Golang program to demonstrate the
// example of O_CREATE constant

package main

import (
	"fmt"
	"os"
)

func main() {
	// Printing the type and value
	fmt.Printf("Type of os.O_CREATE: %T\n",
		os.O_CREATE)
	fmt.Printf("Value of os.O_CREATE: %d\n",
		os.O_CREATE)
}

Output:

Type of os.O_CREATE: int
Value of os.O_CREATE: 64

Example 2:

// Golang program to demonstrate the
// example of O_CREATE constant

package main

import (
	"fmt"
	"os"
)

func main() {
	// Creating a file
	f, err := os.OpenFile("file.txt", os.O_CREATE, 0755)
	fmt.Println(f, ",", err)
}

Output:

RUN 1: (If file exists)
&{0xc000056180} , <nil>

RUN 2: (RUN 1: (If file doesn't exist)
&{0xc000056180} , <nil>

Golang os Package »


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