PHP SSH检测流的末端

Question

我有麻烦从SSH连接中检测流的末端。这就是我尝试的：

<pre><?php
if (!function_exists("ssh2_connect")) die("function ssh2_connect doesn't exist");
if(!($con = ssh2_connect("localhost", 22)))
    echo "fail: unable to establish connectionn";
else
    if(!$ssh = ssh2_auth_password($con, "viassh", "sshpass")) {
        echo "fail: unable to authenticaten";
    } 
        $sshStream = ssh2_shell($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;

?>

给我正确的输出：

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")

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

Answer 1

似乎您可以用phpseclib（纯PHP SSH实现）轻松地做到这一点？：

<?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');
?>

也许我不明白您要做什么？

Answer 2

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

您想做什么？

Answer 3

我知道这是一个旧问题，但我想添加我的输入，因为我找不到在线工作代码片段。phpseclib并不总是是合适的替代品 - 特别是，它缺乏一种可靠的方式来执行命令。我发现PHP扩展更可靠，并且更易于使用。

我的解决方案在下面，这在我们的环境中似乎很好。原理很简单：要求系统在输出前打印一条开始消息，并在输出后发出终端消息（用于此功能，但还有很多其他方法）。该功能等待结束，然后再返回标记之间印刷到控制台的任何内容。

function executeCommand($connection, $command)
    {
        $shell = ssh2_shell($connection, 'xterm');
        sleep(1);
        stream_set_blocking($shell, true);
        printf("Running command: %snn", $command);
        fwrite($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("%sn", $buffer);
                $output .= $buffer."n";
            }
        }
        print("Finished executing commandn");
        fclose($shell);
        print("Shell closedn");
        return trim($output);
    }