popen.c

来自「操作系统Interprocess Communication（IPC）实验源码。」· C语言 代码 · 共 25 行

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <errno.h>

#define BUF_LEN 1000
int main()
{
  pid_t pid;
  FILE *fp;
  char buf[BUF_LEN];
  char cmd[]="ls -l";

  if ((fp=popen(cmd,"r"))<0) {
    perror("popen");
    exit(1);
  }

  while (fgets(buf,sizeof(buf),fp)!=NULL)
    printf("%s",buf);
  pclose(fp);
  system("PAUSE");
  return 0;
}