如图执行， 加上find执行的失败，如果把管道后面find去除，可以成功执行。也就是这种方式
调用系统命令是正确的，是不是windows用go执行find会有权限问题呢？
我也写了一段试试看，发现可以用findstr，但是不能用find，原因还没找到。
```
package main
import (
"fmt"
"log"
"os"
"os/exec"
"runtime"
"strings"
)
const (
winPre = "cmd /c "
LinuxPre = "bash /c "
)
func main() {
cmd := `echo "hello world. A" | findstr "h" | findstr "l" | findstr "o"`
result, err := RunCmd(cmd)
if err != nil {
log.Fatal(err)
}
fmt.Println(string(result))
// readPipe()
}
func RunCmd(cmd string) (result []byte, err error) {
cmdPip := strings.Split(cmd, "|")
if len(cmdPip) < 2 {
return run(cmd).Output()
}
return runPipe(cmdPip)
}
func run(cmd string) *exec.Cmd {
if strings.Contains(cmd, "findstr") || !strings.Contains(cmd, "find") {
cmd = strings.Replace(cmd, `"`, "", -1)
cmd = strings.TrimSpace(cmd)
}
cmdList := strings.Split(cmd, " ")
return exec.Command(cmdList[0], cmdList[1:]...)
}
// 不支持windows的find命令，原因未知
func runPipe(pip []string) (result []byte, err error) {
var cmds []*exec.Cmd
switch runtime.GOOS {
case "windows":
cmds = append(cmds, run(winPre+pip[0]))
case "linux":
cmds = append(cmds, run(LinuxPre+pip[0]))
default:
return nil, fmt.Errorf("Not supported by the system. %v", runtime.GOOS)
}
for i := 1; i < len(pip); i++ {
cmds = append(cmds, run(pip[i]))
cmds[i].Stdin, err = cmds[i-1].StdoutPipe()
if err != nil {
return nil, err
}
}
end := len(cmds) - 1
// cmds[end].Stdout = os.Stdout
stdout, _ := cmds[end].StdoutPipe()
for i := end; i > 0; i-- {
cmds[i].Start()
}
cmds[0].Run()
buf := make([]byte, 512)
n, _ := stdout.Read(buf)
err = cmds[end].Wait()
return buf[:n], err
}
func readPipe() {
var err error
cmd1 := exec.Command("cmd", "/c", `echo hello world.`)
cmd2 := exec.Command("find", "/i", `"he"`)
cmd2.Stdin, err = cmd1.StdoutPipe()
if err != nil {
log.Fatal(err)
}
cmd2.Stdout = os.Stdout
cmd2.Stderr = os.Stderr
cmd2.Start()
cmd1.Run()
err = cmd2.Wait()
fmt.Println(err)
}
```
#8
更多评论
stevewang
耶和华是我的牧者，我必不至缺乏。
在windows下应该是这样：
```
package main
import (
"bytes"
"fmt"
"io"
"os/exec"
)
func main() {
cmd := exec.Command("cmd.exe")
out := &bytes.Buffer{}
cmd.Stdout = out
w, err := cmd.StdinPipe()
if err != nil {
panic(err)
}
if err := cmd.Start(); err != nil {
panic(err)
}
io.WriteString(w, `echo "helloworld" | find /i "hello"`)
io.WriteString(w, "\n")
w.Close()
if err := cmd.Wait(); err != nil {
panic(err)
}
fmt.Println(out.String())
}
```
#2
今日阅读排行
一周阅读排行