I am triggering an executable using php
$commstr = '/abs/path/to/binary > status.txt &';
echo "Running command: ".$commstr."\n";
shell_exec($commstr);
PHP exec() or for that matter system() or shell_exec() works fine because status.txt gets written to, but cat status.txt says error while loading shared libraries: libQtCore.so.4: cannot open shared object file: No such file or directory. This means the binary doesn't get executed
I tried changing my php code to the following without any luck
$commstr = 'export LD_LIBRARY_PATH=/path/to/lib ; /abs/path/to/binary > status.txt &';
The binary is readable by user apache and so are the libraries.
Try running the command as sudo.
for example
$commstr = 'sudo export LD_LIBRARY_PATH=/path/to/lib ; /abs/path/to/binary > status.txt &';
Related
I have a php web application and on one of the route I try to execute node script.
Node script location: C:\Users\meusr\Workspace\www\myproject\directImport.js
I have configured my package.json, such that npm start executes above script.
php (laravel) application's executable index.php located at: C:\Users\meusr\Workspace\www\myPHPproject\public\
And on one of my route: importer/run
I have:
$commandToRun = "npm start --prefix ". env('IMPORTER_PATH'). " /dev/null 2>&1";
Where IMPORTER_PATH is configured in my env, as: IMPORTER_PATH = C:\Users\meusr\Workspace\www\myproject\
when I try to execute the command with exec
exec($commandToRun, $output);
Page keeps on loading no output, no error and no end.
The script has no issue and running the same command on command line on windows system works:
npm start --prefix C:\Users\meusr\Workspace\www\myproject\
outputs as expected.
I thought it was issue with permission first (which should have thrown error, but I still tried and ran another command)
exec('npm -v', $output);
which outputs my npm version.
Similarly I tried to use simply node directImport.js which didn't work either.
Then tried to change directory to the location where node file is located and ran the command again.
exec(cd C:\Users\meusr\Workspace\www\myproject\ && dir /dev/null 2>&1) // this works, but:
exec(cd C:\Users\meusr\Workspace\www\myproject\ && node directImport.js /dev/null 2>&1) // this didn't work
Thanks to miken32, what worked for me was:
<?php
$commandString = 'start /b c:\\programToRun.exe -attachment "c:\\temp\file1.txt"';
pclose(popen($commandString, 'r'));
?>
http://php.net/manual/en/function.popen.php#92413
I have installed Lampp-x64-5.6.3 in my OpenSuse 13.2 OS. I have built a program which require the execution of qpdf which I have installed from the OpenSuse Repo itself.
Well when I run the commands (given below) I get no response & nothing works at all whereas I am able to execute other binary files within the /usr/bin/ directory.
$execQuery = "/usr/bin/qpdf --decrypt --stream-data=uncompress --force-version=1.4 ".escapeshellarg('/opt/lampp/htdocs/test/test.pdf')." ". escapeshellarg('/opt/lampp/htdocs/test/temptest.pdf');
shell_exec($execQuery);
#OR
$execQuery = "/usr/bin/qpdf '/opt/lampp/htdocs/test/test.pdf' '/opt/lampp/htdocs/test/temptest.pdf'";
shell_exec($execQuery);
PHP safe_mode is off, shell_exec, exec, system etc are enabled. Still I am unable to run this particular binary (/usr/bin/qpdf).
I am getting output when I run the commands echo or ls -l or dir or even skype in the php shell_execute functions.
The permission for the file is: -rwxr-xr-x 1 root root 85248 Jun 18 10:31 /usr/bin/qpdf
But however I am able to execute qpdf command via Terminal of the OS. and it creates the file perfectly.
The directory /opt/lampp/htdocs/test/ is writable by both qpdf and apache/lampp
I have tried almost all methods mentioned in various forums but still can't get this executable run the file.
Thanks in advance.
UPDATE:
As suggested tried out this one:
$command = "/usr/bin/qpdf --decrypt --stream-data=uncompress --force-version=1.4 ".escapeshellarg('/opt/lampp/htdocs/test/test.pdf')." ". escapeshellarg('/opt/lampp/htdocs/test/temptest.pdf');
shell_exec($command. " > /opt/lampp/htdocs/debug.log 2>&1");
The errors are logged!
......
/opt/lampp/lib/libstdc++.so.6: version `GLIBCXX_3.4.9' not found
......
SOLUTION:
I simply had to delete the /usr/lib/libstdc++.so.6 file or rename it.
RUN in terminals:
sudo mv /usr/lib/libstdc++.so.6 /usr/lib/libstdc++.so.6___
I simply had to delete the /usr/lib/libstdc++.so.6 file or rename it.
RUN in terminals:
sudo mv /usr/lib/libstdc++.so.6 /usr/lib/libstdc++.so.6___
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 trigger a PHP script to run in the background using the exec() function but I cannot get it to work. I've read countless posts on stack overflow and other forums and tried many variations to no avail.
Server Info:
Operating System: Linux
PHP: 5.2.17
Apache Version: 2.2.23
Home Directory: /home1/username
I'm currently using the code:
exec("/home1/username/php /home1/username/public_html/myscript.php > /dev/null &");
When I run the above script I get no error_log and no error in my cPanel error log, however the script definitely doesn't execute. When I browse to http://www.mydomain.com/myscript.php it runs and e-mails me instantly. Any idea why this isn't working / how I can find out what error is being produced?
Update cPanel Process Manager Output
exec("php /home1/username/php /home1/username/public_html/myscript.php > /dev/null &");
Produces:
27183 php /home1/username/php /home1/username/public_html/myscript.php
27221 [sh]
27207 php /home1/username/php /home1/username/public_html/myscript.php
27219 php /home1/username/php /home1/username/public_html/myscript.php
27222 php /home1/username/php /home1/username/public_html/myscript.php
27224 php /home1/username/php /home1/username/public_html/myscript.php
27249 sh -c php /home1/username/php /home1/username/public_html/myscript.php > /dev/null &
Is that normal? Script appears to hang around for a long time even though it should execute very quickly.
Couldn't get the exec working with php. Even when I got shell access to the server the command just hung. I decided to use wget instead which accomplishes the same thing. Works great :)
exec("wget http://www.mydomain.com/myscript.php > /dev/null &");
Have you tried invoking the php CLI directly?
exec("php /home1/username/php /home1/username/public_html/myscript.php > /dev/null &");
You will not need the #!, which would output to the browser if called through Apache.
EDIT.
It looks like your script is working, but your PHP script executing in the background is hanging (not exiting). Try this variation:
exec("php /home1/username/php /home1/username/public_html/myscript.php > /dev/null 2>&1 &");
What does “> /dev/null 2>&1″ mean?
since you want to run the myscript from your command line, wy not do this:
exec('(/home1/username/public_html/myscript.php) > /dev/null &',$r,$s);
And write this as a first line in the myscript.php:
#!/home1/username/php -n
<?php
//script goes here
?>
That should work. The hashbang tells the system what programme to use to run the script that follows, so you don't need to add that to your exec call. Also, it's safer (and therefore better) to put brackets around the full script call, just so PHP knows what output has to be redirected to what stream, to avoid any issues that might occur. Especially when libs or packages like PHP-GTK are installed on the server (hence the -n option).
I have a PHP script that runs a .bat file on my windows machine using
$result = system("cmd /C nameOfBatchFile.bat");
This sets some environmental variables and is used to call Amazon EC2 API from the command line.
How do I do the same from a Linux server? I have renamed my .bat file to a shell (.sh) and changed the script to use 'export' when setting env vars. I have tested by running the code from a putty terminal and it does what it should. So I know the commands in the script are good. How do I run this from PHP? I have tried running the same command as above with the new filename and I don't get any errors, or file not found etc but it doesn't appear to work.
Where do I start trying to solve this?
---------------------------------- UPDATE -------------------------------
Here is the PHP script that calls the shell file -
function startAmazonInstance() {
$IPaddress = "1.2.3.4"
$resultBatTemp = system("/cmd /C ec2/ec2_commands.sh");
$resultBat = (string)$resultBatTemp;
$instanceId = substr($resultBat, 9, 10);
$thefile = "ec2/allocate_address_template.txt";
// Open the text file with the text to make the new shell file file
$openedfileTemp = fopen($thefile, "r");
contents = fread($openedfileTemp, filesize($thefile));
$towrite = $contents . "ec2-associate-address -i " . $instanceId . " " . $IPaddress;
$thefileSave = "ec2/allocate_address.sh";
$openedfile = fopen($thefileSave, "w");
fwrite($openedfile, $towrite);
fclose($openedfile);
fclose($openedfileTemp);
system("cmd /C ec2/mediaplug_allocate_address_bytemark.sh");
}
And here is the .sh file - ec2_commands.sh
#!/bin/bash
export EC2_PRIVATE_KEY=$HOME/.ec2/privateKey.pem
export EC2_CERT=$HOME/.ec2/Certificate.pem
export EC2_HOME=$HOME/.ec2/ec2-api-tools-1.3-51254
export PATH=$PATH:$EC2_HOME/bin
export JAVA_HOME=$HOME/libs/java/jre1.6.0_20
ec2-run-instances -K $HOME/.ec2/privateKey.pem -C $HOME/.ec2/Certificate.pem ami-###### -f $HOME/.ec2/aws.properties
I have been able to run this file from the command line so I know that the commands work ok. When I had this working on windows there would be a delay as the instance started up and I could echo the results to the screen. Now there is no delay as if nothing is happening.
Put a hash-bang on the first line of your shell script.
#!/bin/bash
Then give it the executable flag.
$ chmod a+x yourshellscript
You can then call it from PHP with system.
$result = system("yourshellscript");
$result = system("/bin/sh /path/to/shellfile.sh");
Is script executable? If not, make it so:
$ chmod a+x script.sh # shell
system ("/path/to/script.sh"); // PHP
or launch it via interpreter:
system("sh /path/to/script.sh"); // PHP
Is interpreter specified in shell script (ie. #!/bin/sh line)?
have you tried shell_exec() ?