exec.Command（“ date”）无法找到日期命令

Question

package main

import (
    "fmt"
    "log"
    "os/exec"
)

func main() {
    out, err := exec.Command("date").Output()
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("The date is %s
", out)
}

This is a code example from the documentation for executing system commands. http://golang.org/pkg/os/exec/#example_Cmd_Output Even on the documentation site the example execute box doesn't run and has the same error: 2009/11/10 23:00:00 exec: "date": executable file not found in $PATH

On Windows I get: exec: "date": executable file not found in %PATH%

How do I get commands to work? Do I need to set a path or write out the full path of the command?

Answer 1

Sadly, that example isn't going to work for you unless you get a date.exe from somewhere (Cygwin?) and put in on your %PATH%.

What's going on, I believe, is that date is a builtin in Powershell. It works for you because your shell is interpreting it.

You may be able to do

out, err := exec.Command("cmd", "/C", "date").Output()

as suggested here; I don't know, I don't have a Windows machine handy.

---

Sidenote:

Get-Command date says "The term 'date' is not recognized as the name of a cmdlet"

There are exactly two Google results for that phrase. One of them leads me to this, which helped me figure this out.