导致C中分段错误的fprintf

错误行位于底部函数的最后几行。我已经把我的错误缩小到fprintf的行，我知道SEG故障并不是与这些代码行同时出现的，另一个线程实际上是造成问题的原因，因为我进一步调试了printf行，在不同的时间间隔使用sleep函数，以便通过估计SEG故障发生的时间以及手动设置的时间间隔来验证错误源介意瞧，如果我使用sleep（3）而不是Caps中的注释，SEG故障会在3秒钟后出现

测试输入和缓冲区，即“缓冲区”，因此包含：“创建迷迭香10密码”

结构定义：

typedef struct {
        struct sockaddr_in addr;
        int sock_fd;
        char name[16];
        time_t time_since_last_msg;
        room *current_room;
} client;

void create_new_room(client* cli, char buffer[]) {

        pthread_mutex_lock(&mutex);

        printf("START create_new_room()\n");

        char room_name[16], password[16], *token;
        int capacity;

        room *new_room = malloc(sizeof(new_room));

        pthread_t tid;

        FILE *rooms = NULL;

        if((rooms = fopen("room-info.txt", "a")) == NULL) {
                perror("Failed to open file.");
                exit(-1);
        }

        token = strtok(buffer, " ");
        token = strtok(NULL, " ");
        strcpy(room_name, token);
        token = strtok(NULL, " ");
        capacity = atoi(token);
        token = strtok(NULL, " ");
        strcpy(password, token);

        FD_ZERO(&(new_room->write_set));
        strcpy(new_room->room_name, room_name);
        new_room->room_id = ++natural_id;
        add_room(new_room);
        sleep(3);

        // WTF IS GOING ON HERE?!?!?! 
        fprintf(rooms, "%s\n", room_name);
        fprintf(rooms, "id=%u\n", natural_id);
        fprintf(rooms, "owner=%s\n", cli->name);
        fprintf(rooms, "capacity=%d\n", capacity);
        fprintf(rooms, "pass=%s\n\n", password);

功能：

typedef struct {
        struct sockaddr_in addr;
        int sock_fd;
        char name[16];
        time_t time_since_last_msg;
        room *current_room;
} client;

void create_new_room(client* cli, char buffer[]) {

        pthread_mutex_lock(&mutex);

        printf("START create_new_room()\n");

        char room_name[16], password[16], *token;
        int capacity;

        room *new_room = malloc(sizeof(new_room));

        pthread_t tid;

        FILE *rooms = NULL;

        if((rooms = fopen("room-info.txt", "a")) == NULL) {
                perror("Failed to open file.");
                exit(-1);
        }

        token = strtok(buffer, " ");
        token = strtok(NULL, " ");
        strcpy(room_name, token);
        token = strtok(NULL, " ");
        capacity = atoi(token);
        token = strtok(NULL, " ");
        strcpy(password, token);

        FD_ZERO(&(new_room->write_set));
        strcpy(new_room->room_name, room_name);
        new_room->room_id = ++natural_id;
        add_room(new_room);
        sleep(3);

        // WTF IS GOING ON HERE?!?!?! 
        fprintf(rooms, "%s\n", room_name);
        fprintf(rooms, "id=%u\n", natural_id);
        fprintf(rooms, "owner=%s\n", cli->name);
        fprintf(rooms, "capacity=%d\n", capacity);
        fprintf(rooms, "pass=%s\n\n", password);

线路

        room *new_room = malloc(sizeof(new_room));

这是错误的。您只为指针分配了一个空间，而结构需要一个空间

应该是

        room *new_room = malloc(sizeof(*new_room));

或

---

问题：

malloc（sizeof（new_room））

另一个证据表明，对于未定义的行为，人们不应该匆忙得出导致它的原因的结论。