这次增加3个假的命令,分别是 pwd、ifconfig 和 date:
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
int print_logo(){
printf("%s\n","");
printf("%s\n"," __ _ _ _");
printf("%s\n"," / _| __ _| | _____| (_)_ __ _ ___ __");
printf("%s\n","| |_ / _` | |/ / _ \\ | | '_ \\| | | \\ \\/ /");
printf("%s\n","| _| (_| | < __/ | | | | | |_| |> <");
printf("%s\n","|_| \\__,_|_|\\_\\___|_|_|_| |_|\\__,_/_/\\_\\");
printf("%s\n","");
}
int main(){
print_logo();
char cmd[100];
while(1)