输入

echo "/bin/ls
     /bin/ls
/bin/ls
   /bin/ls     " | ./hsh

字符串
输出
仅第一个/bin/ls
我想知道为什么它不执行其他命令？我使用strtok来分割字符串输入，因为我理解echo将输入作为由\n分隔的字符串。
我试着在对每个线程进行标记化后执行，它也给出了相同的输出

#include "O_X.h"

/**
 * main - program
 * Return: 0 on success, -1 on fail
 */
char **environ;

int main(void)
{
    char *buff = NULL, *token = NULL;
    int size = 1, kiddo = 0, stat = 0;
    char *arg[] = {"" ,NULL};
    size_t len = 33;
    while (1)
    {
        size = getline(&buff, &len, stdin);
        if (size == -1)
        {
            free(buff);
            exit(0);
        }
        else if (buff == NULL)
            free(buff);
/*      else if (buff[size - 1] == '\n')
            buff[size - 1] = '\0';*/

        token = strtok(buff, "\n");
        while (token != NULL)
        {
            token = strtok(NULL, "\n");
        }

        kiddo = fork();
        if (kiddo == -1)
            printf("Process error!\n");
        if (kiddo == 0)
        {
            if (buff[0] != '/')
              buff++;
                execve(buff, arg, environ);
            return (0);
        }
        else
        {
            wait(&stat);
        }
    }
    return (0);
}

型