C:运行系统命令并获取输出? [英] C: Run a System Command and Get Output?

问题描述

可能的重复:
如何运行外部从 C 编写程序并解析其输出?

我想在 linux 中运行一个命令并获得它输出的返回文本，但我不希望将此文本打印到屏幕上.有没有比制作临时文件更优雅的方法?

I want to run a command in linux and get the text returned of what it outputs, but I do not want this text printed to screen. Is there a more elegant way than making a temporary file?

推荐答案

您想要popen" 函数.这是运行命令ls/etc"并输出到控制台的示例.

You want the "popen" function. Here's an example of running the command "ls /etc" and outputing to the console.

#include <stdio.h>
#include <stdlib.h>


int main( int argc, char *argv[] )
{

  FILE *fp;
  char path[1035];

  /* Open the command for reading. */
  fp = popen("/bin/ls /etc/", "r");
  if (fp == NULL) {
    printf("Failed to run command
" );
    exit(1);
  }

  /* Read the output a line at a time - output it. */
  while (fgets(path, sizeof(path), fp) != NULL) {
    printf("%s", path);
  }

  /* close */
  pclose(fp);

  return 0;
}

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