c语言利用读取命令行（多行读取）

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

int main()
{

	FILE *fh = popen("ifconfig 2> /dev/null", "r");
	char iwstation[4096] = {0};
	char total[4096] ={0};
        while(fgets(iwstation, 4096, fh)!=NULL){
		strcat(total,iwstation);
	);
            }			               
	pclose(fh);

	printf("\nend--res = %s\n",total);
	return 0;

}