2

我无法从 ssh 连接检测流的结束。这是我尝试过的：

<pre><?php
if (!function_exists("ssh2_connect")) die("function ssh2_connect doesn't exist");
if(!($con = ssh2_connect("localhost", 22)))
    echo "fail: unable to establish connection\n";
else
    if(!$ssh = ssh2_auth_password($con, "viassh", "sshpass")) {
        echo "fail: unable to authenticate\n";
    } 

        $sshStream = ssh2_shell($con, 'xterm', null, 80, 24, SSH2_TERM_UNIT_CHARS);
        $strCommand = 'cd /var/www/test';
        fwrite($sshStream, $strCommand . PHP_EOL);
        stream_set_blocking($sshStream, true);

        // infinite loop
        #$stderr_stream = fgets(ssh2_fetch_stream($sshStream, SSH2_STREAM_STDERR), 8192);
        #var_dump($stderr_stream);

        // infinite loop
        #var_dump(stream_get_contents($sshStream));

        $ret = "";
        while ($buf = fgets($sshStream)) {
            $ret .= $buf;

            // always false
            #$meta = stream_get_meta_data($sshStream);
            #var_dump($meta['eof']);

            // works
            if(strpos($buf, '$ cd ') !== false) break;
        }
        $strCommand = 'git status';
        fwrite($sshStream, $strCommand . PHP_EOL);
        stream_set_blocking($sshStream, true);
        while ($buf = fgets($sshStream)) {
            $ret .= $buf;
            if (strpos($buf, '-a') !== false) break;
        }
        fclose($sshStream);
        echo $ret;


?>

这给了我正确的输出：

Welcome to Ubuntu 12.04.1 LTS (GNU/Linux 3.2.0-32-generic-pae i686)

 * Documentation:  https://help.ubuntu.com/

20 packages can be updated.
0 updates are security updates.

Last login: Tue Oct 23 16:45:20 2012 from localhost

cd /var/www/test
]0;viassh@rcdev: ~viassh@rcdev:~$ cd /var/www/test
git status
]0;viassh@rcdev: /var/www/testviassh@rcdev:/var/www/test$ git status
# On branch develop
# Changes not staged for commit:
#   (use "git add ..." to update what will be committed)
#   (use "git checkout -- ..." to discard changes in working directory)
#
#   modified:   ssh_1.php
#   modified:   ssh_1.php~
#   modified:   ssh_shell.php
#   modified:   ssh_shell.php~
#
# Untracked files:
#   (use "git add ..." to include in what will be committed)
#
#   ssh_stream1.php
#   ssh_stream1.php~
no changes added to commit (use "git add" and/or "git commit -a")

但只是因为我知道流的最后一行。我尝试了 feof()，但也失败了。所以希望有人可以帮助我。

4

3 回答 3

0

看起来这是已知的行为。http://php.net/manual/en/function.ssh2-shell.php

你想做什么？

于 2012-10-24T16:44:00.697 回答
0

似乎您可以使用纯 PHP SSH 实现 phpseclib轻松做到这一点？：

<?php
include('Net/SSH2.php');

$ssh = new Net_SSH2('www.domain.tld');
if (!$ssh->login('username', 'password')) {
    exit('Login Failed');
}

echo $ssh->exec('git status');
?>

也许我不明白你想做什么？

于 2012-10-23T21:59:05.310 回答
0

我知道这是一个老问题，但我想添加我的输入，因为我无法在线找到有效的代码片段。phpseclib 并不总是合适的替代品——尤其是它缺乏一种可靠的方式来按顺序执行命令。我发现 PHP 扩展更可靠，也更易于使用。

我的解决方案如下，这在我们的环境中似乎效果很好。原理很简单：要求系统在输出之前打印一条 BEGIN 消息，在输出之后打印一条 END 消息（base64 用于此，但还有很多其他方式）。该函数在返回标记之间打印到控制台的任何内容之前等待 END。

function executeCommand($connection, $command)
    {
        $shell = ssh2_shell($connection, 'xterm');
        sleep(1);
        stream_set_blocking($shell, true);
        printf("Running command: %s\n\n", $command);
        fwrite($shell, 'echo "LS0tLUJFR0lOLS0tLQo=" | base64 --decode;'.$command.';printf "\n";echo "LS0tLUVORC0tLS0K" | base64 --decode;'.PHP_EOL);

        $output = '';
        $output_start = false;
        while (true) {
            $buffer = fgets($shell);
            flush();
            if(strpos($buffer, "----BEGIN----") !== false) {
                $output_start = true;
                continue;
            }
            if(strpos($buffer, "----END----") !== false) {
                break;
            }

            if($output_start) {
                printf("%s\n", $buffer);
                $output .= $buffer."\n";
            }
        }
        print("Finished executing command\n");
        fclose($shell);
        print("Shell closed\n");
        return trim($output);
    }
于 2015-06-29T21:15:05.473 回答