标签：pen pop size str 实现 linu error: file sizeof
在项目里用system(),然后发现调用失败，返回值为-1,感觉这个函数有点不靠谱。决定用popen()来替代system().具体参考了http://blog.sina.com.cn/s/blog_8043547601017qk0.html
具体实现如下，具体分析等有空再加上
int my_system(const char * cmd)
{
FILE * fp;
int res; char buf[1024];
if (cmd == NULL)
{
printf("my_system cmd is NULL!\n");
return -1;
}
if ((fp = popen(cmd, "r") ) == NULL)
{
perror("popen");
printf("popen error: %s/n", strerror(errno)); return -1;
}
else
{
while(fgets(buf, sizeof(buf), fp))
{
printf("%s", buf);
}
if ( (res = pclose(fp)) == -1)
{
printf("close popen file pointer fp error!\n"); return res;
}
else if (res == 0)
{
return res;
}
else
{
printf("popen res is :%d\n", res); return res;
}
}
}
标签：pen pop size str 实现 linu error: file sizeof
原文地址：http://www.cnblogs.com/new-ass/p/7307214.html
