Golang Getmntent: Accessing Mount Entries using syscall Package

In Go, you can use the syscall package to interact with system calls. To get the mount entries, you can use the syscall.Getmntent function.

Here's an example code that demonstrates how to use Getmntent in Go:

package main

import (
	"fmt"
	"syscall"
	"unsafe"
)

func main() {
	file, err := syscall.Setmntent("/etc/mtab", "r")
	if err != nil {
		fmt.Println("Failed to open mtab:", err)
		return
	}
	defer syscall.Endmntent(file)

	var mnt syscall.Mntent
	for {
		_, err := syscall.Getmntent(file, &mnt)
		if err != nil {
			break
		}
		fmt.Printf("Mount point: %s\n", mnt.Mountpoint)
		fmt.Printf("File system: %s\n", mnt.Fstype)
		fmt.Printf("Mount options: %s\n", mnt.MntOpts)
		fmt.Printf("Device: %s\n", mnt.MntDir)
		fmt.Printf("==================================\n")
	}
}

In this example, we first use syscall.Setmntent to open the /etc/mtab file, which contains the mount entries. We specify the mode as "r" to open it in read mode.

We then use a loop to read each mount entry using syscall.Getmntent. The Getmntent function reads the next entry from the FILE stream and stores it in the provided Mntent struct. We print the mount point, file system type, mount options, and device for each entry.

Finally, we use syscall.Endmntent to close the /etc/mtab file.

Note: This code is for Unix-like systems. The location of the mount table file may vary on different operating systems.