How to Retrieve Hard Link Count in Go?

Retrieving Hard Link Count in Go

Go's os.Stat function provides access to various file information, including file mode, size, and modification time. To determine the number of hard links to a specific file in Go, we need to access the underlying system data.

According to the POSIX stat system call, the number of hard links is stored in the st_nlink field of the returned stat structure. In Go, we can obtain the underlying system data using the Sys method.

For instance, on Linux, the following code snippet exemplifies how to retrieve the hard link count:

<code class="go">package main

import (
    "fmt"
    "os"
    "syscall"
)

func main() {
    fi, err := os.Stat("filename")
    if err != nil {
        fmt.Println(err)
        return
    }

    nlink := uint64(0)
    if sys := fi.Sys(); sys != nil {
        if stat, ok := sys.(*syscall.Stat_t); ok {
            nlink = uint64(stat.Nlink)
        }
    }

    fmt.Println(nlink)
}</code>

When executed, this program prints the number of hard links to the file named "filename".

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