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我已经创建了一个会话和一个通道。一个请求(ssh_channel_request_exec
)应该每隔一秒发送一次,我想读这个请求的答案(ssh_channel_read
)。但是,我找不到如何进行多个请求的示例,api仅包含如何提出请求,阅读答案并关闭频道的示例。libssh - 多次发送请求并从通道中读取答案
当我尝试按顺序两次从通道请求和读取数据时,ssh_channel_request_exec
第二次返回错误。是否有必要为每个请求打开一个新频道?
int ret = ssh_channel_request_exec(m_channel, request.c_str());
if (ret != SSH_OK)
{
ssh_channel_close(m_channel);
ssh_channel_free(m_channel);
return false;
}
std::stringstream sstream;
nbytes = ssh_channel_read(m_channel, buffer, sizeof(buffer), 0);
while (nbytes > 0)
{
sstream.write(buffer, nbytes);
nbytes = ssh_channel_read(m_channel, buffer, sizeof(buffer), 0);
}
if (nbytes < 0) // 'nbytes' becomes zero the first time, the channel is not closed the second time!
{
ssh_channel_close(m_channel);
ssh_channel_free(m_channel);
return false;
}
response = sstream.str();
API还包含从在示例信道读取后使用的ssh_channel_send_eof
功能。有什么好处? api只说“在通道上发送文件结尾,这不会关闭通道,您仍然可以读取但不能写入。”
一种用于ssh_channel_is_eof
校验(API:“检查远程已发送EOF”)示出了信道没有EOF的第一次,但第二时间,它是。