Unfortunately I do not have access to the droplet via console, only by Vesta panel and I need to set up cron job.
However, I can not find the right path to PHP. Now that command line looks that and it does not work:
/usr/local/vesta/bin/php5 -c /home/admin/web/ -q /home/admin/web/mysite.com/public_html/crop_scripts/cron.php
Please tell me what options instead of "/usr/local/vesta/bin/php5" I can try?
what does this code show when you access it through your web server (assuming exec call is allowed)
<?php
$output = array();
exec('which php',$output);
var_dump($output);
Related
I'm running
nginx 1.17.4
php 7.4
arch linux 5.4.2
Trying to execute the following command to get my user MAC address from IP (this script will run on my lan server) and $_SERVER['REMOTE_ADDR'] does return a valid ip
shell_exec("sudo /usr/bin/nmap -n -sn ".$_SERVER['REMOTE_ADDR'])
But it returns null so I tried the following to get a more info
shell_exec("sudo /usr/bin/nmap -n -sn ".$_SERVER['REMOTE_ADDR'] ." 2>&1")
And got the following: sudo: effective uid is not 0, is sudo installed setuid root?
I don't understand why I get this error because I have added the following in my sudder file
http ALL=NOPASSWD: /usr/bin/nmap
I've modified my passwd to allow login from HTTP to try it in shell and it works but not when I run it in the browser.
Help please!
Thanks
since my server is arch linux I decide to go ask in that arch forum and found was able to fix my issue. so for anybody interested please view
https://bbs.archlinux.org/viewtopic.php?pid=1877560#p1877560
Basically for me it was changing the php-fpm service file to the following
/etc/systemd/system/multi-user.target.wants/php-fpm.service
Set NoNewPrivileges=false
comment CapabilityBoundingSet
I'm in trouble and that much confused about a php shell_exec command.
When the command is execute by PHP I have no error but the execution fails. If I use exactly the same command from a terminal it works.
Here's the command :
/usr/bin/wkhtmltopdf --lowquality --dpi 300 --encoding utf-8 "/tmp/knplabs_snappyxa9otq.html" "/tmp/knplabs_snappyv3pD7h.pdf"
When I lauch this from a terminal :
$ /usr/bin/wkhtmltopdf --lowquality --dpi 300 --encoding utf-8 "/tmp/knplabs_snappyWG9XTd.html" "/tmp/knplabs_snappyv3pD7h.pdf"
Loading page (1/2)
Printing pages (2/2)
Done
But from my php script :
// Construct the previous command
$command = $this->buildCommand($url, $path);
../..
shell_exec($command);
../..
$content = file_get_contents($path);
../..
I've test the output of shell_exec, it's empty.
The log :
Warning: file_get_contents(/tmp/knplabs_snappyv3pD7h.pdf): failed to open stream: No such file or directory in /*****/lib/snappy/SnappyMedia.class.php on line 64
No permission pb in the /tmp directory :
$ ls -la /tmp
total 448
drwxrwxrwt 16 root root 4096 mars 12 21:51 .
../..
I've tried avec the PHP exec() function to get error informations, I just get an "1" error code in return_var and nothing in output.
For information this issue appear on my test server, my desktop computer but not on my notebook. All the 3 are with sames PHP, Apache, Mysql versions.
I don't understand anything ...
Thanks for any help, I'm loosing my mind.
David.
I've found the solution here : Executing wkhtmltopdf from PHP fails
Thanks to Krzychu.
First to get information from the shell_exec command add " 2>&1" at the end of the command. In that way you will get information in return of the command :
$no_output = shell_exec($command);
echo $no_output; // nothing
$output = shell_exec($command . ' 2>&1');
echo $output; // in my case : "cannot connect to X server"
The solution :
Not use the wkhtmltopdf ubuntu package (0.9.9-4)
Use the official package from the Wkhtmltopdf download page
So no need to install xvfb ! (I've seen this advice many times)
Looks like a user's permissions issue.
When you run the command from the terminal, it is the user account, currently used, which does have the right permissions, to run a command in /usr/bin, and execute the specific file.
When you run it from the php script, it is the http server account on your system, which needs the permission to execute the file in /usr/bin. Usually this is the apache user.
How you should setup permissions depends on your system. Just remember that what is allowed for apache, is allowed for anyone accessing your http server.
I have had this problem for ages and adding . ' 2>&1' after the $command has somehow solved the problem.
this:
$output = shell_exec($command . ' 2>&1');
instead of:
$output = shell_exec($command);
No idea why but it works and I'm grateful.
Is it a shared hosting? It seems like shell_exec is a restricted function. Try running error_reporting(E_ALL); ini_set('display_errors', 1); before calling shell_exec.
I stumbled upon the same Problem, in my case an absolut Path in the exec Command like /var/www did not work, I had to use relative Paths from the point where I executed the php File.
I also wanted to notice, that it did not work using shell_exec, however it worked using normal exec command, not sure wheres the difference here.
I'm trying to list running services on a windows server via php. Therefore I'm using shell_exec with winexe.
My script:
$cmd = "winexe --interactive=0 --user='***' --password='***' //192.168.***.** \"net start\"";
$output = shell_exec($cmd);
echo $output;
Unfortunately on execution the page loads forever with no result. The command works on the command-line (Debian).
Anyone an idea?
Thanks in advance.
Save $cmd with correct format into a new bash file. Set cmd value for call this file. Remember set execution perms to this file.
Check if your apache user has perms for exec winexe
===
Try to launch
cat </dev/null | winexe --interactive=0 --ostype=1 --user=...
I'm trying to set up a centralized server which is in charge of monitoring my other servers. This centralized server needs to be able to collect particular information/metrics about a specific server (such as df -h and service httpd status); but it also needs to be able to restart Apache if needed.
If it wasn't for the Apache restart, I could write a listening script to provide a means of giving the centralized server the data it needs without having to SSH in. But because I also want it to be able to restart Apache, it needs to be able to log in and initiate scripts through a combination of PHP and Bash.
At the moment, I'm using PHP's shell_exec to execute this (very simple) Bash script:
#!/bin/sh
ssh -i /path/to/keyFile.pem ec2-user#x.x.x.x;
I'm accessing the external server (which is an EC2 instance) through a private IP. If I launch this script, I can log in without any problem - the problem comes, however, when I then want to send back the output for commands like the ones I've listed above.
In a Bash script, how would I output a command like df -h after SSHing into another server? Is this possible?
There is a PECL extension for SSH.
Other than that you'll probably want to either use the &$output parameter of exec() to grab the output:
$output = array();
exec('bash myscript.sh', $output);
print_r($output);
Or use output redirection
$output = '/path/to/output.txt';
exec("bash myscript.sh > $output");
if( file_exists($output) && is_readable($output) ) {
$mydata = file_get_contents($output);
}
and, of coure, this all assumes your script looks like what jeroen has in his answer.
You could use:
ssh -i /path/to/keyFile.pem ec2-user#x.x.x.x 'df -h'
or for multiple commands:
ssh -i /path/to/keyFile.pem ec2-user#x.x.x.x 'ls -al ; df -h'
That works from the command line but I have not tried it via php's exec (nor on Amazon to be honest...).
If you're doing ssh I'd suggest phpseclib, a pure PHP SSH implementation. It's a ton more portable than the PECL SSH extension and more reliable too.
I try to run the wkhtmltopdf (0.11.0 rc1) with php (5.4.2) on apache (2.4.2).
When I try to launch wkhtmltopdf-i386 --use-xserver http://www.google.com google.pdf 2>&1, I can find my pdf. Here my php code
<?php
$cmd= '/usr/bin/wkhtmltopdf-i386 http://www.google.com google.pdf 2>&1';
$ret = shell_exec($cmd);
echo $ret;
?>
It works with apache and as command line php test.php.
Because my target page contains many images and some "heavy" js charts. I have got a Segmentation Fault with the wkhtmltopdf command when I try to turn it into pdf.
The only way to make it work is to use xvfb as X11 emulator. The code looks like this :
<?php
$cmd= '/usr/bin/xvfb-run /usr/bin/wkhtmltopdf-i386 --use-xserver http://www.google.com google.pdf 2>&1';
$ret = shell_exec($cmd);
echo $ret;
?>
This script works with the command line php test.php but it doesn't work with apache. If I take a look into the apache's process with htop, I can see that there are two process (with php test.php) :
xvfb
wkhtmltopdf
When I launch with apache I have only xvfb process. It finish by a timeout from apache because it's waiting the wkhtmltopdf process.
I can make it works with apache (2.2.21) and php (5.3.10).
Is there something that I'm missing ? Maybe something in the apache's config-files ?
I was having the same problem. I was using the exec function, but the same applies to shell_exec. The function execution was disabled in php.ini.
SOLUTION: Remove the shell_exec string from the disable_functions at php.ini file.
I am not sure why your second version is not callable from Apache (must not be using the same shell, since shell_exec uses a shell?), but as a work-around could you (from Apache PHP) shell_exec("php test.php"); and get your intended result?
Perhaps also try one of the other process execution functions such as pcntl_exec.
it's mostly because of ownership and permissions, try
su www-data (for debian)
php test.php
you'll probably see the error.