linux unix系统编程

#include <stdlib.h>

void leaky_function() {
    int *ptr = (int *)malloc(sizeof(int));
    // 忘记释放内存
}

int main() {
    leaky_function();
    return 0;
}

#include <pthread.h>

pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t mutex2 = PTHREAD_MUTEX_INITIALIZER;

void* thread1(void* arg) {
    pthread_mutex_lock(&mutex1);
    pthread_mutex_lock(&mutex2);
    // 执行任务
    pthread_mutex_unlock(&mutex2);
    pthread_mutex_unlock(&mutex1);
    return NULL;
}

void* thread2(void* arg) {
    pthread_mutex_lock(&mutex2);
    pthread_mutex_lock(&mutex1); // 可能导致死锁
    // 执行任务
    pthread_mutex_unlock(&mutex1);
    pthread_mutex_unlock(&mutex2);
    return NULL;
}

chmod 755 /path/to/file

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

int main() {
    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    struct sockaddr_in server_addr;
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(8080);
    inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr);

    if (connect(sockfd, (struct sockaddr*)&server_addr, sizeof(server_addr)) == -1) {
        perror("connect");
        return 1;
    }
    // 进行通信
    close(sockfd);
    return 0;
}