This is driving me crazy. I need to have php execute a command to restart a script running in node. I'm using a node app called forever to run said script. The code is as follows:
<?php
echo '<pre>';
echo exec('sudo -u dalton forever restart botti.js 2>&1');
echo '</pre>';
?>
However, when I run that, I get sudo: forever: command not found
Next, I try which forever and type forever, both which give me:
forever: /usr/local/bin/forever
I edit my code to:
echo exec('sudo -u dalton /usr/local/bin/forever restart botti.js 2>&1');
Edit: After a typo, the error is now:
/usr/bin/env: node: No such file or directory
I'm at my wit's end. Any ideas?
As the forever command only runs, when you give the full path, I suspect, that /usr/local/bin is not in your PATH environment variable, which contains all directories, that are searched for executable commands by default, separated by : (I suspect you're on Linux, may differ for other OS)
I suspect forever calls /usr/bin/env node. The error from env is probably caused by node being outside your PATH too.
To set your PATH in php, use putenv('PATH=<your path here>');
e.g. to append /usr/local/bin:
putenv('PATH=' . getenv('PATH') . ':/usr/local/bin')
This may also be a sudo issue, try the -E (preserve environment) switch.
Figured it out, I needed to define node as well:
$asdf = system('sudo -E -u dalton /usr/local/bin/node /usr/local/bin/forever restart botti.js 2>&1');
Create a symbolic link for forever
ln -s /usr/local/bin/forever /usr/bin/env/forever
And also for nodejs if incase it's still called "nodejs". Make it call as "node"
ln -s /usr/bin/nodejs /usr/bin/node
I will solve the forever execution problem.
For php side, try with this
echo shell_exec("your command sh");
Related
I've a shell_test.php file in /var/www/html folder with this code:
<?php
shell_exec('/var/www/html/config.sh');
?>
config.sh in the same folder has this code:
#!/bin/sh
sudo -u root kill -SIGHUP $(cat /var/www/html/mosquitto/mosquitto.pid)
When I run ./config.sh from folder, it runs.
When I run command in config.sh file directly in terminal, it
works too.
I've added this into sudoers file so that there is no need of password:
www-data ALL=(ALL) NOPASSWD: /var/www/html/config.sh
The thing is it's working fine when run using terminal in both the mentioned ways. Why is not executing when run in PHP?
Your problem is probably, that it is apache, www-data or some other user that is running your script and you try to run it as root.
Try without sudo -u root and change the group of the file to www-data with:
chown root:www-data your-script
As you say "It isn't outputting anything but my mosquitto broker is resetting every time it runs which lets me know"
I think you should replace
shell_exec('/var/www/html/config.sh');
with
$output = shell_exec('/var/www/html/config.sh');
echo $output;
According to php docs "shell_exec — Execute command via shell and return the complete output as a string"
shell_exec doesn't print by default; you have to store the string output and then use it
I made few changes in codes and it worked.
In shell_test.php, I changed code like this:
<?php
shell_exec('sudo -S ./config.sh');
?>
In config.sh, I changed like this:
#!/bin/sh
sudo kill -SIGHUP $(cat /var/www/html/mosquitto/mosquitto.pid)
I want to run a script on my ubuntu server with a variable from php in it.
Here are some of the things i've tried to pass a variable to ubuntu...
shell_exec('vpsName=HI3');
vpsName=`mysql -D jake_db -h 127.0.0.1 -u jake -pXXXXXXX -se "SELECT vpsName FROM reinstalls WHERE status = 'pending'"`;
The final way in which i thought I could fix it was to avoid running the script through ubuntu all together and run it from shell_exec(); but it fails on running the guestfish commands.
Here is my entire reinstalls.sh script.
sudo rm /var/lib/libvirt/images/"$vpsName".qcow2 && sudo wget -O /var/lib/libvi$
guestfish -a /var/lib/libvirt/images/"$vpsName".qcow2 <<'EOF'
run
mount /dev/ubuntu-vg/root /
rm /etc/network/interfaces
EOF
sudo fusermount -u /mnt && virsh start "$vpsName" && echo "IT WORKED!"
I am open to any way of getting this to work, as long as its secure,
Thanks in advance,
Jake
EDIT:
If I run the script with a VPS name instead of a variable, it works. I just can't find a way to pass the variables from the website to the ubuntu16.04 OS.
Well one way would be to run each command from PHP:
shell_exec("sudo rm /var/lib/libvirt/images/" . $vpsName . ".qcow2");
shell_exec("sudo wget -O /var/lib/libvi ... etc");
The other would be to invoke your shell script from PHP, passing the vps name as a parameter:
shell_exec("reinstalls.sh " . $vpsName)
But then you'd have to rewrite the shell script to pick up the command line parameter and apply it as necessary. In the case of bash, this explains how to go about that.
I'm trying to execute a command through PHP with shell_exec. The PHP file is hosted by Apache on my Ubuntu server.
When I run this:
echo shell_exec("ps ax | grep nginx");
Then I get to see data. But when I run another command, for example:
echo shell_exec("cat /usr/local/nginx/config/nginx.config");
Then it's not showing anything at all. But when I copy that command and paste it in my terminal, then it executes fine.
My Apache server is running as user www-data. So I edited sudoers and added this line:
www-data ALL=(ALL:ALL) ALL
I know this is a security risk, but I wanted to make sure (for now) that www-data is able to execute all commands. But, for some reason I'm still not able to execute all commands with my PHP script.
Anyone any idea what to do?
have you read http://php.net/manual/en/function.shell-exec.php
There is quite a discussion in comments section. Top comment is:
If you're trying to run a command such as "gunzip -t" in shell_exec and getting an empty result, you might need to add 2>&1 to the end of the command, eg:
Won't always work:
echo shell_exec("gunzip -c -t $path_to_backup_file");
Should work:
echo shell_exec("gunzip -c -t $path_to_backup_file 2>&1");
In the above example, a line break at the beginning of the gunzip output seemed to prevent shell_exec printing anything else. Hope this saves someone else an hour or two.
echo shell_exec("sudo cat /usr/local/nginx/config/nginx.config");
Try that.
I have been trying to execute a script using shell_exec() function in php:
I've written the following lines of code:
$command = "bash /path/to/my/script/ funciton_name() 2>&1";
echo shell_exec($command);
Inside the shell script I'm doing:
sudo rsync -avvc /source/path /destination/path
On executing this on the browser, I get the following error message:
sudo: no tty present and no askpass program specified
When I execute the same shell script on my server, it executes fine.
When I went through similar questions posted on this forum, I realised that I had to add the NOPASSWD line on my server which I found out has already been added in the following format:
User_Alias NOBODY=nobody,apache
NOBODY ALL=(ALL) NOPASSWD : /path/to/my/script
Also when I do:
echo shell_exec("whois");
I get the output as:
apache
Any assistance in overcoming this problem would be of great help.
sudo will require a TTY, even if you have set up it up to be passwordless, unless you explicitly do not require it. But as #Cfreak pointed out, it would be much better (simpler and safer) to avoid sudo by setting correct access rights (read it before continuing) in the first place.
rsync itself will not require root permissions on a sanely configured *nix install. To verify this, you can check that type -a rsync doesn't print anything weird like rsync is aliased to `sudo rsync' and that ls -l $(which rsync) prints sensible permissions (at least rx for everyone).
I don't know what the deal is here…
So I want to run an applescript: sudo osascript myscript.scpt
This works fine in the terminal, but not when I execute it via PHP's exec(); nothing happens. The console says
no tty present and no askpass program specified ; TTY=unknown ; …
I did my research, and it seems I'm missing the password for the sudo command. I tried a couple different ways to get around this, including:
writing %admin ALL=(ALL) ALL in /etc/sudoers
and proc_open() instead of exec()
none of which seem to be working, consequently driving me CrAzY!
So basically, is there a clear-cut way to get PHP to execute a simple terminal command?
EDIT: to clarify, myscript.scpt is a simple appleScript that changes the onscreen UI (for a larger project). In theory, simply osascript myscript.scpt should be enough, however the sudo is for some reason necessary to invoke some response from the system. If the sudo could be somehow eliminated, I don't think I would be having this permissions problem.
It sounds like you need to set up passwordless sudo. Try:
%admin ALL=(ALL) NOPASSWD: osascript myscript.scpt
Also comment out the following line (in /etc/sudoers via visudo), if it is there:
Defaults requiretty
I think you can bring specific access to user and command with visudo something like this:
nobody ALL = NOPASSWD: /path/to/osascript myscript.scpt
and with php:
#exec("sudo /path/to/osascript myscript.scpt ");
supposing nobody user is running apache.
php: the bash console is created, and it executes 1st script, which call sudo to the second one, see below:
$dev = $_GET['device'];
$cmd = '/bin/bash /home/www/start.bash '.$dev;
echo $cmd;
shell_exec($cmd);
/home/www/start.bash
#!/bin/bash
/usr/bin/sudo /home/www/myMount.bash $1
myMount.bash:
#!/bin/bash
function error_exit
{
echo "Wrong parameter" 1>&2
exit 1
}
..........
oc, you want to run script from root level without root privileges, to do that create and modify the /etc/sudoers.d/mount file:
www-data ALL=(ALL:ALL) NOPASSWD:/home/www/myMount.bash
dont forget to chmod:
sudo chmod 0440 /etc/sudoers.d/mount
I recently published a project that allows PHP to obtain and interact with a real Bash shell. Get it here: https://github.com/merlinthemagic/MTS
The shell has a pty (pseudo terminal device, same as you would have in i.e. a ssh session), and you can get the shell as root if desired. Not sure you need root to execute your script, but given you mention sudo it is likely.
After downloading you would simply use the following code:
$shell = \MTS\Factories::getDevices()->getLocalHost()->getShell('bash', true);
$return1 = $shell->exeCmd('/path/to/osascript myscript.scpt');
Run sudo visudo command then set -%sudo ALL=(ALL:ALL) to %sudo ALL=(ALL:ALL) NOPASSWD: ALL it will work.
I had a similar situation trying to exec() a backend command and also getting no tty present and no askpass program specified in the web server error log. Original (bad) code:
$output = array();
$return_var = 0;
exec('sudo my_command', $output, $return_var);
A bash wrapper solved this issue, such as:
$output = array();
$return_var = 0;
exec('sudo bash -c "my_command"', $output, $return_var);
Not sure if this will work in every case. Also, be sure to apply the appropriate quoting/escaping rules on my_command portion.
The best secure method is to use the crontab. ie Save all your commands in a database say, mysql table and create a cronjob to read these mysql entreis and execute via exec() or shell_exec(). Please read this link for more detailed information.
killProcess.php
I think directly calling a sudo command might be difficult because you are setting up the whole server to work without a password.
Perhaps as an alternative you could setup a CRONjob as root and monitor a flag file. Once the flag file exists it will run the osascript myscript.scpt and then delete the flag file.
This way you will keep SUDO secure from a config point of view and the server safer. To run the script you just need to touch the flag file from PHP.
It would of course introduce a delay of however many minutes you running the CRON job. It would also mean that you would have to redirect the output to a file and have a async monitor of the output, but it will depend on your application if this is a problem or not.
But it is an alternative that might protect the server.