C++/Php/Python 语言执行shell命令

编程中经常需要在程序中使用shell命令来简化程序，这里记录一下。

1. C++ 执行shell命令

 1 #include <iostream>
 2 #include <string>
 3 #include <stdio.h>
 4
 5 int exec_cmd(std::string cmd, std::string &res){
 6     if (cmd.size() == 0){   //cmd is empty
 7         return -1;
 8     }
 9
10     char buffer[1024] = {0};
11     std::string result = "";
12     FILE *pin = popen(cmd.c_str(), "r");
13     if (!pin) { //popen failed
14         return -1;
15     }
16
17     res.clear();
18     while(!feof(pin)){
19         if(fgets(buffer, sizeof(buffer), pin) != NULL){
20             result += buffer;
21         }
22     }
23
24     res = result;
25     return pclose(pin); //-1:pclose failed; else shell ret
26 }
27
28 int main(){
29     std::string cmd = "ls -ial";
30     std::string res;
31
32     std::cout << "ret = " << exec_cmd(cmd, res) << std::endl;
33     std::cout << res << std::endl;
34
35     return 0;
36 }

2. Php执行shell命令

1 <?php
2     $cmd = "wc -l ./test.php";
3     exec($cmd, $output, $code);
4
5     echo $code."\n";
6     print_r($output);
7 ?>

3. Python执行shell命令

1 import commands
2
3 status, output = commands.getstatusoutput('ls -lt')
4
5 print status
6 print output