Have you worked directly with syscalls?

Yes, in Go you can work directly with system calls (syscall) using the syscall package or the more modern golang.org/x/sys.

Direct use of syscall is useful when you need to invoke low-level OS functions that are not covered by the standard Go library.

An example of calling a system call to get the process ID:

package main

import (
	"fmt"
	"syscall"
)

func main() {
	pid := syscall.Getpid()
	fmt.Printf("PID: %d\n", pid)
}

However, in most cases, it is recommended to use higher-level abstractions from the standard library, as they are more portable and safe.

Working with syscall requires understanding OS specifics and caution, as errors can lead to crashes or resource leaks.