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(PHP Extension) SSH Remote Shell Multiple CommandsDemonstrates how to start a shell on a remote SSH server, run a command, and retrieve the output, then run the next command, retrieve the output, etc.
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $ssh = new CkSsh(); // This is the prompt we'll be expecting to find in // the output of the remote shell. $myPrompt = 'chilkat@ubuntu:~/workspace$'; // Connect to an SSH server: // Hostname may be an IP address or hostname: $hostname = 'www.some-ssh-server.com'; $port = 22; $success = $ssh->Connect($hostname,$port); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } // Wait a max of 10 seconds when reading responses.. $ssh->put_IdleTimeoutMs(10000); // Authenticate using login/password: $success = $ssh->AuthenticatePw('myLogin','myPassword'); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } // Open a session channel. (It is possible to have multiple // session channels open simultaneously.) $channelNum = $ssh->OpenSessionChannel(); if ($channelNum < 0) { print $ssh->lastErrorText() . "\n"; exit; } $termType = 'dumb'; $widthInChars = 120; $heightInChars = 40; // Use 0 for pixWidth and pixHeight when the dimensions // are set in number-of-chars. $pixWidth = 0; $pixHeight = 0; $success = $ssh->SendReqPty($channelNum,$termType,$widthInChars,$heightInChars,$pixWidth,$pixHeight); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } // Start a shell on the channel: $success = $ssh->SendReqShell($channelNum); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } // Run the 1st command in the remote shell, which will be to // "cd" to a subdirectory. $success = $ssh->ChannelSendString($channelNum,'cd workspace\r\n','ansi'); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } // Retrieve the output. $success = $ssh->ChannelReceiveUntilMatch($channelNum,$myPrompt,'ansi',true); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } // Display what we've received so far. This clears // the internal receive buffer, which is important. // After we send the command, we'll be reading until // the next command prompt. If the command prompt // is already in the internal receive buffer, it'll think it's // already finished... $cmdOutput = $ssh->getReceivedText($channelNum,'ansi'); if ($ssh->get_LastMethodSuccess() != true) { print $ssh->lastErrorText() . "\n"; exit; } print $cmdOutput . "\n"; // Run the 2nd command in the remote shell, which will be // to "ls" the directory. $success = $ssh->ChannelSendString($channelNum,'ls\r\n','ansi'); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } // Retrieve and display the output. $success = $ssh->ChannelReceiveUntilMatch($channelNum,$myPrompt,'ansi',true); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } $cmdOutput = $ssh->getReceivedText($channelNum,'ansi'); if ($ssh->get_LastMethodSuccess() != true) { print $ssh->lastErrorText() . "\n"; exit; } print $cmdOutput . "\n"; // Start the final command in the remote shell. This example // will send a "ls -l" command to retrieve the long format directory listing. $success = $ssh->ChannelSendString($channelNum,'ls -l\r\n','ansi'); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } // Send an EOF. This tells the server that no more data will // be sent on this channel. The channel remains open, and // the SSH client may still receive output on this channel. $success = $ssh->ChannelSendEof($channelNum); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } // Read whatever output may already be available on the // SSH connection. ChannelReadAndPoll returns the number of bytes // that are available in the channel's internal buffer that // are ready to be "picked up" by calling GetReceivedText // or GetReceivedData. // A return value of -1 indicates failure. // A return value of -2 indicates a failure via timeout. // The ChannelReadAndPoll method waits // for data to arrive on the connection usingi the IdleTimeoutMs // property setting. Once the first data arrives, it continues // reading but instead uses the pollTimeoutMs passed in the 2nd argument: // A return value of -2 indicates a timeout where no data is received. $pollTimeoutMs = 2000; $n = $ssh->ChannelReadAndPoll($channelNum,$pollTimeoutMs); if ($n < 0) { print $ssh->lastErrorText() . "\n"; exit; } // Close the channel: $success = $ssh->ChannelSendClose($channelNum); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } // Perhaps we did not receive all of the commands output. // To make sure, call ChannelReceiveToClose to accumulate any remaining // output until the server's corresponding "channel close" is received. $success = $ssh->ChannelReceiveToClose($channelNum); if ($success != true) { print $ssh->lastErrorText() . "\n"; exit; } $cmdOutput = $ssh->getReceivedText($channelNum,'ansi'); if ($ssh->get_LastMethodSuccess() != true) { print $ssh->lastErrorText() . "\n"; exit; } print $cmdOutput . "\n"; // Disconnect $ssh->Disconnect(); ?> |
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