linux c语言实现sftp

#include <libssh/libssh.h>
#include <libssh/sftp.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
    ssh_session my_ssh_session;
    sftp_session sftp;
    int rc;

    // 创建SSH会话
    my_ssh_session = ssh_new();
    if (my_ssh_session == NULL) {
        exit(-1);
    }

    // 设置SSH会话选项
    ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, "example.com");
    ssh_options_set(my_ssh_session, SSH_OPTIONS_USER, "username");
    ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port);

    // 连接到SSH服务器
    rc = ssh_connect(my_ssh_session);
    if (rc != SSH_OK) {
        fprintf(stderr, "Error connecting to host: %s\n", ssh_get_error(my_ssh_session));
        ssh_free(my_ssh_session);
        exit(-1);
    }

    // 验证用户身份
    rc = ssh_userauth_password(my_ssh_session, NULL, "password");
    if (rc != SSH_AUTH_SUCCESS) {
        fprintf(stderr, "Authentication failed: %s\n", ssh_get_error(my_ssh_session));
        ssh_disconnect(my_ssh_session);
        ssh_free(my_ssh_session);
        exit(-1);
    }

    // 创建SFTP会话
    sftp = sftp_new(my_ssh_session);
    if (sftp == NULL) {
        fprintf(stderr, "Unable to create SFTP session: %s\n", ssh_get_error(my_ssh_session));
        ssh_disconnect(my_ssh_session);
        ssh_free(my_ssh_session);
        exit(-1);
    }

    // 初始化SFTP会话
    rc = sftp_init(sftp);
    if (rc != SSH_OK) {
        fprintf(stderr, "Unable to init SFTP session: %s\n", ssh_get_error(my_ssh_session));
        sftp_free(sftp);
        ssh_disconnect(my_ssh_session);
        ssh_free(my_ssh_session);
        exit(-1);
    }

    // 列出远程目录内容
    sftp_dir dir;
    dir = sftp_opendir(sftp, ".");
    if (dir == NULL) {
        fprintf(stderr, "Unable to open directory: %s\n", ssh_get_error(my_ssh_session));
        sftp_free(sftp);
        ssh_disconnect(my_ssh_session);
        ssh_free(my_ssh_session);
        exit(-1);
    }

    sftp_attributes attrs;
    while ((attrs = sftp_readdir(dir)) != NULL) {
        printf("%s\n", attrs->name);
        sftp_attributes_free(attrs);
    }

    sftp_closedir(dir);
    sftp_free(sftp);
    ssh_disconnect(my_ssh_session);
    ssh_free(my_ssh_session);

    return 0;
}

gcc -o sftp_example sftp_example.c -lssh

./sftp_example