Windows command line additional quotation mark in parameter in Golang

I would like to write a batch helper in Windows (Windows 8.1 with Go 1.3.1) to using exiftool.exe.

The reason I to run command line in Go is I tried to access some EXIF information which I retrieval from other web side. I just want to write back to picture EXIF.

Here is my code segment.

		str_abs, _ := filepath.Abs(target_path)
		str_title := fmt.Sprintf("-title=\"%s\"", ext_str)
		stdout, err := exec.Command("cmd", "/c", "exiftool.exe", str_title, "-E", str_abs).Output()

However I found there always a addtional quote will in parameter so the result will identical with:

exiftool.exe -title=""TITLE"" -E TARGET_FILE

Any idea how it happen? or any suggestion for how to handle parameter like this.

Note:

• The reason I separate parameter and string combine it again, because command line need use unicode string such as Chinese String.

• exiftool.exe only works on command line with "&#%d;" code with Chinese Character in Windows so I do more handle for this.

• How ever it also happen error if I use non-unicode such as (title shows '1234' not 1234)

   	stdout, err := exec.Command("cmd", "/c", "exiftool.exe", "-title", "1234", str_abs).Output()
  

• error code:Run command eror: exit status 1.

-----Update on 2014/09/10 for @VonC-------------------------------------------------

Hi VonC,

I tried to do the same thing as your provided code, but it not works for me.
I am curious about command line code page, I tried it in 477(US) 950 (Big5) both not work for me.

There is two thing I would like to discuss.

• The Chinese word must change to &#%d; otherwise it will wrong display.

  • ex: 世界 -> 世界 Check this wrong encoding picture for encode display error.

• Even I tried it, but it still display extra " in my picture title.

  • Refer this extra quotation picture.

• My code sample as follow:

    output, err := exec.Command(`d:\exiftool.exe`,
    `-title="test 2世界"`,
    //If it not trasnfer from 世界 -> 世界  it could not display correctly.
    "-E", "test.jpg").CombinedOutput()
    if err != nil {
        fmt.Println(err.Error())
    }
    fmt.Println(string(output))
  

I just tested:

output, err := exec.Command(`c:\prgs\exiftool-9.70\exiftool.exe`,
	`-title="test 2 世界"`,
	"-E", "test.jpg").CombinedOutput()
if err != nil {
	fmt.Println(err.Error())
}
fmt.Println(string(output))

And it seems to work just fine.
Note that exec.CombinedOutput() allows to see a bit more than just "exit status 1" in case of a problem.

A second call will dispay all EXIF matadata:

exec.Command(`c:\prgs\exiftool-9.70\exiftool.exe`, "test.jpg").CombinedOutput()

The title is the expected test 2 世界.

fmt.Printf("%q", "somestring") => "somestring"