Linux-C[1]: Is linux using big-endian or little endian ?

We found in Linux , the storage of integer is little-endian.

Test

void printchar(char * p , int length ){
    for (int i = 0;i<length;i++){
        printf("%x ",p[i]);
    }
}

int main() {
    int x= 0x12345678;
    char * p =(char *)(&x);
    printchar(p,4);
    printf("\nAfter hton funciton , this is show like this :\n");
    int y =  htonl(x);
    char * py =(char *)(&y);
    printchar(py,4);
 }

Then we will find the output is showed like this :

78 56 34 12 
After hton function , this is show like this :
12 34 56 78 

One more thing ,my test environment is :4.8.0-39-generic, thanks for your reading.