Php ssh2 bindings

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title: 'PHP SSH2 Bindings'
date: '2013-10-16T13:10:01-05:00'
status: publish
permalink: /php-ssh2-bindings
author: admin
excerpt: ''
type: post
id: 472
category:
    - PHP
    - SSH
tag: []
post_format: []

PHP can use the bindings to the libssh2 library which provide access to resources (shell, remote exec, tunneling, file transfer) on a remote machine using a secure cryptographic transport. I documented some code snippets for future reference.

You can use ssh keys but for simplicity here making the call with a password:

$conn_id = ssh2_connect('server', 22);
ssh2_auth_password($conn_id, 'user', 'pwd');

echo("SOLARIS SERVER SNAPSHOTS - CREATION);
$stream=ssh2_exec($conn_id,"/usr/sbin/zfs list -t snapshot -o name,creation | grep $share | grep -v tank");
$outS="";
stream_set_blocking($stream, true);
while($o=fgets($stream)){
$outS = $outS . $o;
}
fclose($stream);
print_snaps_sorted($outS);

Slightly more complicated to make up the built-in javascript "command" you are passing when using a ZFS appliance.

$chk_snaps_cmd="
run('select DBF');
run('snapshots');
snapshots = list();
for (i = 0; i < snapshots.length; i++) {
run('select ' + snapshots[i]);
creation = run('get creation');
printf('%s %s', snapshots[i],creation);
run('cd ..');
}";

$share = $_GET['share'];
$conn_id = ssh2_connect('server', 22);
ssh2_auth_password($conn_id, 'user', 'pwd');
echo('ZFS STORAGE APPLIANCE SNAPSHOTS - CREATION');
$stream=ssh2_exec($conn_id,"script run('shares select $share');" . $chk_snaps_cmd);
stream_set_blocking($stream, true);
while($o=fgets($stream)){
  $outS = $outS . $o;
}
fclose($stream);
print_snaps_sorted($outS);

Note: I had an issues using ssh calls not returning results when using a non-privileged user whereas a root user worked. Thanks Matt M for pointing out the obvious. I needed to use the full path to the binary in this case /usr/sbin/zfs so most likely some path issue in the user shell.