今天在弄一下啊小小程序的时候。报错,出现了问题。先看代码
int main(int argc, char* argv[])
{char *filename = "interface_ipset_1_1.json";char* split1 = "_";char* split2 = ".";char splitfile1[4][NAME_MAX];sagent_string_split(filename,split1,splitfile1,4);printf("1 = %s.",splitfile1[0]);reuturn 0;}
int32_t sagent_string_split(char * str, const char * split,char split_str[][NAME_MAX], int32_t max_num)
{if (st== NULL || split == NULL || split_str == NULL || max_num <= 0){printf("sagent_string_split params have error!
");}char* result = NULL;char* endstr = NULL;result = strtok_r(str, split,&endstr);int32_t i = 0;while (result ){if (i >= max_num){printf("split num is more than max_num = %d.", max_num);return -1;}printf("i = %d,result = %s",i,result);strncpy(split_str[i++], result, NAME_MAX - 1);result = strtok(NULL, split);}return 0;
}int main(int argc, char* argv[])
{char *filename = "interface_ipset_1_1.json";char* split1 = "_";char* split2 = ".";char splitfile1[4][NAME_MAX];sagent_string_split(filename,split1,splitfile1,4);printf("1 = %s.",splitfile1[0]);reuturn 0;
}
在运行这个程序的时候。报错,Segmentation fault 这个错误。哪踩内存了呢。原来char *filename = "interface_ipset_1_1.json"; 这样声明是 一个常量,不可更改的,而strtok在使用过程中会把它进行改动,造成了错误。所以须要注意。
能够这样声明char filename[64] = "interface_ipset_1_1.json"