I'm having some problems with PHP SSH2 commands.
So I have succesfully connected my dedicated server with my app, but I have no idea how to run command with that.
I'm using phpsclib ( http://phpseclib.sourceforge.net ), when I write something like
echo $ssh->read('username#username:~$');
$ssh->write("ls -la\n");
echo $ssh->read();
It will give me a list from root, but the problem is I don't want to be in root.
I need to cd /another_file and execute command that will start some game server.
I tried something like
$ssh->write("cd /another_file");
$ssh->write("my command here");
But no success, it's showing commands in same line.
Any ideas how to do that?
You have several options.
Chain the commands using $ssh->write():
$ssh->write("cd /another_file && ls -la\n");
...or...
$ssh->write("cd /another_file; ls -la\n");
Chain the commands using $ssh->exec(). Works much the same way as above except that you don't need to append \n to your command and you don't need to bother with the $ssh->read().
Do multiple $ssh->write() calls, which is what your current attempt is attempting to do. But it's doing it wrong:
$ssh->write("cd /another_file");
$ssh->write("my command here");
In your first code snippet you're appending a \n but you're not doing so on these lines. You need to because, when you're in an interactive shell, the way the shell knows that you're done typing the command out is because you hit the enter button. That's how Linux knows you're done typing and are ready for your command to run.
You also need to read the prompt before running the next command. eg. $ssh->read('[prompt]') or whatever is appropriate for your system. I suppose you could just omit passing a parameter to $ssh->read() all together, as you do in your first code snippet, but then it'll take 10s or so for $ssh->read() to return any output when it could have alternatively been returning output instantly.
Related
I'm trying to execute a command on my Raspberry Pi via SSH and get the result of it in my PHP script on my Windows machine. Currently I can execute the command on my RasPi, but I do not get any results back into the PHP script.
The code I'm Using for this:
<?php
$cmd = "C:\\path_to_putty\\putty.exe -ssh pi#RasPiIP -pw raspberry -m C:\\path_to_test.txt\\test.txt";
$result = shell_exec($cmd);
echo $result;
?>
For sending commands to my RasPi the code works. I have tested multiple times by as example changing test.txt to sudo reboot and it worked as intended.
I'm using PuTTY to send my command (test.txt is currently nfc-list which returns connected Scanners etc not important right here) to the RasPi.
What I want to achieve is that $result contains the returned data when my command is executed.
Is it even possible to do that? If yes how (any help appreciated). If no, are they maybe other ways to approach this?
Addressing the possible duplicate: I am using a Windows Machine and also I'm trying to get the result (of the one command) to reuse in my PHP script. In the other question, user is trying to save the full console log and save it to another file.
First, do not use PuTTY. PuTTY is a GUI application intended for an interactive use. Use Plink, which is command-line/console equivalent of PuTTY intended for command automation. Being a console application, it has a standard output, which can be read in PHP (PuTTY as a GUI application does not have standard output).
With Plink, you can also specify the command on Plink command line, so you do not need to create the test.txt command file.
In any case, there's no way to make PuTTY or Plink separate an output of command only (at least not from a command-line).
But what you can do, is to print some header/trailer to distinguish the start and end of the command output, like:
plink.exe -ssh pi#RasPiIP -pw raspberry "echo start-of-command && command && echo end-of-command"
And then in PHP, you can look for the start-of-command and end-of-command to identify what part of Plink output is really the command output.
In any case, you better use a PHP SSH library to achieve what you want, rather then driving an external application. For example phpseclib. But that's a completely different question.
I'm developing a code which uses ldap_search Shell Script Command for extracting user information from Active Directory using user id and by proper LDAP Server Authentication. I am getting accurate result from ldap_search script.
But, whenever I put the shell script inside exec or shell_exec PHP command, I'm not getting anything.
All the other shell scripts are working fine with the help of PHP exec command except ldap_search.
Is there some additional task left for me to do?
Is ldap_search and exec/shell_exec not compatible with each other?
You must use echo exec('your command or script');
Make sure to have permissions to run it. I mean, the web user must have permissions to execute that.
May seem obvious, but I think your failure is in something basic like this. You must put echo to show the result of the command.
EDIT After reading your new comments about it and using that new info... I saw you are trying to redirect the output to a file... but maybe you have 2 different problems.
Have the user which is executing php (usually www-data) permission to write on the folder where the php is?
Your code has quotes inside quotes that must be escaped using . Try this:
<?php exec("ldapsearch -x -v -h 'LDAP://server' -p '389' -D 'uid=\"domain_user_id\",ou=users,ou=internal,o=\"organization\"' -w 'domain_password' -b 'ou=users,ou=internal,o=organization' 'uid=person's_user_id' >> result.txt"); ?>
So you don't need echo if you want the output in a file. And the redirection >> can be inside the command executed, not in php.
Remember that > replaces de file and what you have >> add at the end of the file.
I am executing a bunch of ssh commands with php's exec. All of them seems to work correctly except one of them:
$command = 'ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no user#127.0.0.1 "verify /md5 filename"';
exec($command, $output);
These commands are being executed on a Cisco router if that makes any difference.
The output is about 99% completed however it gets cut off at the end. I don't receive the last line at all and the second to last line always gets cut off after the 1st character. I also tried passtru and got the same results.
I've also tried adding 2>&1 to the end of the command and it made no difference. Anyone know what is going on here or have any ideas?
Here are the last 2 lines. This is what I expect:
..........Done!
verify /md5 (flash:filename) = 8743b52063cd84097a65d1633f5c74f5
I get
.
Also, running this on command line works perfectly. I have seen others with similar issues but there wasn't really any solution. This is on php 5.3.3.
I have a little more information to add to this. I created a separate script that only called the exec and this command and got the same output. This rules out any thing else in my file or the framework I'm using.
I also ran the new script from command line and it worked perfectly. Running the script in the browser however returns the bad results.
I can verify that it has something to do with how the data is being returned and those dots. The ...... must load in a way that PHP doesn't like and it thinks the command is done.
I have a development / testing setup on a windows box and need to test calling a background process. I am using http://www.somacon.com/p395.php as a list of options for running a background service.
Here is the sample code I am trying to run:
$string = "PsExec.exe -d cmd /c \"mspaint\"";
echo $string;
exec($string, $data);
This works when I type it into the command line.
I haven't attempted to do a lot of exec's on Windows, but it would be nice to be able to test it locally before moving to a Linux box.
Right now, I am thinking it has something to do with the fact that psexec opens a new window? I don't know how to fix that, however.
There are no apache or PHP error logs being generated, the page just never stops. This also seems to override PHP's max execution time.
EDIT:
This is not fully correct answer. The command psexec \\machine cmd.exe /C 1 & dir won't hang because psexec first return saying that command 1 doesn't exists in remote machine and then dir is evaluated in the local machine. I got tricked by cmd operator order. The & operator is being invoked in the local cmd.exe process, not the remote one. But the logic still applies if you quote the command: psexec \\machine cmd.exe /C "1 & dir".
Original Answer:
There is something strange going on while invoking psexec within PHP in windows. No matter if you are using shell_exec(), exec(), popen() or proc_open(). It will hang anyway.
Honestly I don't know what's going on, you could also download PsExplorer in order to trace your process command line, arguments, etc. You'll find this tool very useful.
I'm using XAMPP on Windows, and after certain tests I found this:
First of all create a test file (i.e. test.php) and place it in your web server so you can access it with this content:
<?php
echo "<pre>".shell_exec("psexec \\\\machine <options> cmd.exe /C dir")."</pre>";
?>
Note that you could use GET arguments in order to create a more flexible example. To debunk that this indeed is working before you test over a webpage, issue the command php <path-to-the-file>\test.php. That will work perfectly. But, it won't work on a web browser.
If you kill the process, you'll get the first line: El volumen de la unidad C no tiene etiqueta.. Next line, in my language there's an accent included so I thought It could be encoding (or code pages) issues. So instead of cmd.exe /C dir I tested cmd.exe /C chcp 850 && dir. That, for my surprise, works.
Then, I realize that no matter what command you set before it will also work, for instance, cmd.exe /C 123 & dir (note the single & as I'm not evaluating the command output).
Honestly, I don't know what is going on with psexec and PHP via web browser. More surprisingly, commands like cmd.exe /C copy cmd.exe cmd.exe.deleteme and cmd.exe /C mkdir deletethis will work!
So, you could give it a try to cmd.exe /C 1 & \"mspaint\" as your problem and my seems similars. For single commands could be a workaround but I'm developing an unattended framework for installing software and all my files are .cmd or .exe or .bat files.
Let me know If you found something interesting :)
I have a solution!
This topic is old but still relevant. I wanted to use PsExec 2.2 with PHP 7.2.0 RC3 to execute a script remotely. I need the output of the script and so i was using PsExec.exe -accepteula \\HOST -u xxx -p xxx with >> LOGFILE 2>&1.
Because I dont want to wait the script to finish, I used exec() like this: exec('start /p cmd /c PsExec.exe -accepteula \\HOST -u xxx -p xxx >> LOGFILE 2>&1').
My php script continues working and PsExec does his job too.
Everything works fine but my LOGFILE always contains only the first line of the STDOUT output.
I have tried many solutions mentioned here, but none of them worked for me. Executing the command in the CMD directly, PsExec returns all lines of STDOUT but inside php it does not.
At the php doc for exec() I have found comments where some people used PsExec to run a programm without waiting (http://php.net/manual/de/function.exec.php#86438). As a last chance I tried the following: exec('PsExec.exe -accepteula -i -d cmd /c PsExec.exe -accepteula \\HOST -u xxx -p xxx >> LOGFILE 2>&1')... And it works!
PsExec now returns everthing into my LOGFILE. I hope I could help you and save you some time.
My current solution was to use WScript.Shell:
$string = "cmd /c \"cd {$full_base}{$newSource} && ant release > compile.txt\"";
$Shell = new COM("WScript.Shell");
$exec = $Shell->Run($string, 0, false);
Not sure if this was definitively answered or not, but I was having the same problem with PSEXEC hanging, though in my case, on some machines it did, and others it didn't. It turned out to be accepting the EULA. On machines that I'd run it from a command line and used the same username/password as my PHP script, it ran without hanging.
Further research showed that I could specify the EULA acceptance by including it in the command being executed from PHP:
This DID hang: psexec \\MACHINENAME ...
This did NOT: psexec /accepteula \\MACHINENAME ...
ok here are the things. I also jumped into similar condition as you were and hopefully since i am commenting this late you must have figured out a way too .But for those who are still in this problem , i suggest them few tips .
1)The code that has been posted is super fine , no problem with that thing. If your page hangs out infinitely then try to add -i -d params before the source exe. (see the documentation HERE ). You can also add -accepteula (EULA) flag in the command to let the page load and not to wait for that command to finish(solves the infinite wait problem).
2)For me these things didnt work . It doesnt mean that you guys dont try these things .these are the first steps if your code starts working then thats fine for you.Else ,make another account as an adminstrative one ,type services.msc in the start menu , you will see the page there. Search for wampapache or xammp services ,excluding mysqld one. Then simply click on that service .GO to log on tab ,select This account .Select the previously made admin acc , type its password if you set that else leave the textbox empty.Type the name of that account as \\accname at the name field . If u dont know the account name ,Click to Browse->Advanced->FInd now you will see that name account . Select, apply settings and restart the wamp app and you are good to go :)
Also make sure to double check the string you feed into your exec command. Seems trivial, but had me stumped for awhile. In many cases PHP escapes the double backslash in your machine address which throws everything off. To get around this, create your string like:
$string = 'PSExec /accepteula \\\\MACHINENAME ...'
I'm building a PHP web application that will run on my machine, and one of its purposes is to call HandBrakeCLI with an exec() or similar call. If I run the command
HandBrakeCLI -i path_to_dvd_drive -o output_file --preset preset_name
from a shell, it works fine. However, when I put the exact same command in an exec() php function (or similar), it doesn't work, and doesn't return anything, aside from a return status of 0. No errors, nothing else.
Is this just a simple permissions issue that I'm not seeing, due to the lack of errors being spit out? Or am I missing something else?
For debugging, try running the command from the console but as the user PHP runs as. Here are some pointers how to find out which user that is.
Then use sudo to run the command as the Apache user. You will probably get more helpful information from that.
try to exec your script using absolute path (type which HandBrakeCLI in terminal to find it) and append 2>&1 to the end of command, like:
exec('HandBrakeCLI -i path_to_dvd_drive -o output_file --preset preset_name 2>&1')
this way if command outputs anything to stderr you will see it.
is handbrake in the path of whatever shell PHP is invoking when it does the exec()? Does whatever account PHP/webserver is running under have access to the directory where handbrak.exe is, and have permission to execute handbrake.exe? Does the webserver account have permissions to access the dvd drive, etc...
Many things to check, and without better diagnostic information, this is about the best you'll be able to get here.