在c ++中等效的popen

FILE *popen(const char *command, const char *mode);

#include <stdio.h>

int main() {
    FILE *fp;
    char buffer[1024];

    // 执行命令并读取输出
    fp = popen("ls -l", "r");
    if (fp == NULL) {
        printf("popen failed\n");
        return 1;
    }

    // 读取输出并打印
    while (fgets(buffer, sizeof(buffer), fp) != NULL) {
        printf("%s", buffer);
    }

    // 关闭文件指针
    pclose(fp);

    return 0;
}

#include <iostream>
#include <string>
#include <cstdlib>

extern "C" {
    std::string main_handler(const std::string& event, const std::string& context) {
        std::string command = "ls -l";
        std::string result = "";

        // 执行命令并读取输出
        FILE* fp = popen(command.c_str(), "r");
        if (fp != NULL) {
            char buffer[1024];
            while (fgets(buffer, sizeof(buffer), fp) != NULL) {
                result += buffer;
            }
            pclose(fp);
        }

        return result;
    }
}