Linux 中添加系统调用的历史

Linux 系统调用的演进历程

c
#include 
#include 
#include 
int main() {
    char buffer[1024];
    int fd = open("example.txt", O_RDONLY);
    ssize_t bytesRead = read(fd, buffer, sizeof(buffer));
    write(STDOUT_FILENO, buffer, bytesRead);
    close(fd);
    return 0;
}

c
#include 
#include 
#include 
int main() {
    int serverSocket = socket(AF_INET, SOCK_STREAM, 0);
    
    struct sockaddr_in serverAddress;
    serverAddress.sin_family = AF_INET;
    serverAddress.sin_port = htons(8080);
    serverAddress.sin_addr.s_addr = INADDR_ANY;
    bind(serverSocket, (struct sockaddr*)&serverAddress, sizeof(serverAddress));
    listen(serverSocket, 5);
    // Accept and handle connections...
    return 0;
}

c
#include 
#include 
int main() {
    scmp_filter_ctx ctx = seccomp_init(SCMP_ACT_ALLOW);
    seccomp_rule_add(ctx, SCMP_ACT_KILL, SCMP_SYS(execve), 0);
    seccomp_load(ctx);
    
    // Restricted code...
    return 0;
}