/
command.go
79 lines (70 loc) · 1.69 KB
/
command.go
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/*
guest-file-write - write file to fd inside guest
Example:
{ "execute": "guest-file-write", "arguments": {
"handle": int // required, unique fd identifier
"buf-b64": string // required, base64 encoded data
"count": int // optional, number of bytes to write
}
}
*/
package guest_file_write
import (
"encoding/base64"
"encoding/json"
"fmt"
"io"
"os"
"github.com/vtolstov/qemu-ga/qga"
)
func init() {
qga.RegisterCommand(&qga.Command{
Name: "guest-file-write",
Func: fnGuestFileWrite,
Enabled: true,
Returns: true,
Arguments: true,
})
}
func fnGuestFileWrite(req *qga.Request) *qga.Response {
res := &qga.Response{Id: req.Id}
reqData := struct {
Handle int `json:"handle"`
BufB64 string `json:"buf-b64"`
Count int `json:"count,omitempty"`
}{}
resData := struct {
Count int `json:"count"`
Eof bool `json:"eof"`
}{}
err := json.Unmarshal(req.RawArgs, &reqData)
if err != nil {
res.Error = &qga.Error{Code: -1, Desc: err.Error()}
} else {
if iface, ok := qga.StoreGet("guest-file", reqData.Handle); ok {
f := iface.(*os.File)
var buffer []byte
buffer, err = base64.StdEncoding.DecodeString(reqData.BufB64)
if err != nil {
res.Error = &qga.Error{Code: -1, Desc: err.Error()}
return res
}
var n int
n, err = f.Write(buffer)
switch err {
case nil:
resData.Count = n
res.Return = resData
case io.EOF:
resData.Count = n
resData.Eof = true
res.Return = resData
default:
res.Error = &qga.Error{Code: -1, Desc: err.Error()}
}
} else {
res.Error = &qga.Error{Code: -1, Desc: fmt.Sprintf("file handle not found")}
}
}
return res
}