利用Golang如何调用Linux命令详解

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package main
 
 import (
  "fmt"
  "io/ioutil"
  "os/exec"
 )
 
 func main() {
  cmd := exec.Command("/bin/bash", "-c", `df -lh`)
 
  //å建è·åå½ä»¤è¾åºç®¡é
  stdout, err := cmd.StdoutPipe()
  if err != nil {
   fmt.Printf("Error:can not obtain stdout pipe for command:%s\n", err)
   return
  }
 
  //æ§è¡å½ä»¤
  if err := cmd.Start(); err != nil {
   fmt.Println("Error:The command is err,", err)
   return
  }
 
  //读åææè¾åº
  bytes, err := ioutil.ReadAll(stdout)
  if err != nil {
   fmt.Println("ReadAll Stdout:", err.Error())
   return
  }
 
  if err := cmd.Wait(); err != nil {
   fmt.Println("wait:", err.Error())
   return
  }
  fmt.Printf("stdout:\n\n %s", bytes)
 }

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package main
 
 import (
  "bufio"
  "fmt"
  "os/exec"
 )
 
 func main() {
  cmd := exec.Command("/bin/bash", "-c", `df -lh`)
 
  //å建è·åå½ä»¤è¾åºç®¡é
  stdout, err := cmd.StdoutPipe()
  if err != nil {
   fmt.Printf("Error:can not obtain stdout pipe for command:%s\n", err)
   return
  }
 
  //æ§è¡å½ä»¤
  if err := cmd.Start(); err != nil {
   fmt.Println("Error:The command is err,", err)
   return
  }
 
  //使ç¨å¸¦ç¼å²ç读åå¨
  outputBuf := bufio.NewReader(stdout)
 
  for {
 
   //ä¸æ¬¡è·åä¸è¡,_ è·åå½åè¡æ¯å¦è¢«è¯»å®
   output, _, err := outputBuf.ReadLine()
   if err != nil {
 
    // å¤æ­æ¯å¦å°æ件çç»å°¾äºå¦ååºé
    if err.Error() != "EOF" {
     fmt.Printf("Error :%s\n", err)
    }
    return
   }
   fmt.Printf("%s\n", string(output))
  }
 
  //wait æ¹æ³ä¼ä¸ç´é»å¡å°å¶æå±çå½ä»¤å®å¨è¿è¡ç»æ为止
  if err := cmd.Wait(); err != nil {
   fmt.Println("wait:", err.Error())
   return
  }
 }

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# command-line-arguments
 ./exec_command.go:36: cannot convert err (type error) to type string

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type error interface {
  Error() string
 }

æ以 err.Error() ææ¯ä¸ä¸ª string ç±»åçè¿åå¼ã

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