I have a problem trying to run passthru function in my php code (Joomla module). the code is following (this is only a snippet)
ob_start();
passthru("/usr/bin/whois 85.70.231.130 | /usr/bin/grep 'address:'",$code);
$whoisData = ob_get_contents();
ob_end_clean();
$whoisData = str_replace("address:", "", $whoisData);
$whoisArray = split("\n",$whoisData);
echo trim($whoisArray[1]);
when I run this on my localhost, it echoes what it should, but when I run this code on the production server, it echoes nothing and the $code variable contains 127 (command not found). I tryied add absolute paths to these commands into the passthru function, but it didn't helped. Interesting is, that when I run the code right from terminal via ssh and php command, it runs well, but when it's called from application context it doesn't. Does anybody know what I should to do?thanks
SOME EDITS..
safe_mode is on
webserver does not see into /usr/bin and /bin/ folders so what is the best way how to run these commands from php?
usr/bin/grep doesn't look like a valid path to a command.
The missing / at the beginning of the path to the second command might explain the command not found error... even if the first whois command is found.
Have you looked to see if your webserver / php is running chrooted?
print_r(glob('/*'));
if (file_exists('/usr/bin/grep') && file_exists('/usr/bin/whois')) {
print "maybe its a permissions thing?\n";
} else {
print "can't see executables required\n";
}
should give you a clue.
So I have already solved my problem with phpwhois library. I seems like with my server configuration is it unlikely that these functions will be working well. So thanks for your help:)
Related
I'm trying to use a php script for executing a shell script. However I'm having some issues apparently with the web server.
I have a bash script called switch_audio.sh. It basically changes the active audio output of the system.
I also have a script.php that runs the code below:
<?php
echo "It's working";
exec("/var/www/html/switch_audio.sh");
?>
When I execute php script.php it's working fine. However, when I try to run it on the web browser by localhost/script.php I just get as ouput the "echo" part.
I've already tried to:
remove 'exec()' from the disable functions in php.ini;
give permissions for everybody in every folder on this path from "/" to the localhost folder;
Any thoughts about it?
Simple solution: exec() returns a string, but you also have to output it to the user:
<?php
echo "It's working";
echo exec("/var/www/html/switch_audio.sh");
?>
You already said you allowed the shell function on your php.ini configuration but it seems it's not working yet... so maybe:
You didn't restarted webserver service after changes
You have somewhere other statement more restrictive... maybe ini_set in your php files.
As a reminder, be sure that you are doing well on your php.ini file, check it for this kind of statement:
disable_functions=exec,passthru,shell_exec
Maybe you can try instead of exec other similar php function like shell_exec to check if it works. Or maybe is working and not showing anything.
I'm trying to execute a php script from a php file, but it seems that i can't get the correct bin path of the php.exe. Its not doing anything as far as i can tell. Lets assume service-oauth.php is a simple echo.
EDIT3:
I fixed it using php-cli instead of php or the php bin path, i must admit that i tried this before but it seems something else was off when i tried this (one of the first things i tried). The answer provided by Keith in Can't execute PHP script using PHP exec , so it ended being a duplicate :S, thanks for the help to those who commented.
EDIT2:
I tried calling the script directly from the server console as #Dagon suggested and it works, both using the php env variable and the php path to the bin, its clear that the path is correct, but something is preveting to get the output or to run the script using the php exec() function
service-oauth.php
<?php echo "Hello there"; ?>
And this is my script:
$basePath = plugin_dir_path( __FILE__ ); # Wordpress function, asume it works.
$fileToExc = $basePath . 'service-oauth.php';
# PHP_BINDIR: /usr/local/bin
# PHP_BINARY: /usr/bin/php
# exec("which php") /usr/bin/php
$phpPath = exec("which php");
$output = exec("$phpPath $fileToExc");
print_r($output);
There are a lot of answers on stackoverflow that recommend any of those 3 options i commenented in the code, but none of them seems to work, not sure if it is the path or something else that is not working. I've tested this script on my localmachine (windows) and it works (even though i had to use a hardcoded path to the bin since i wans't getting the correct path), but i'm testing on my production server (linux) and is not working.
Note: Let me be clear, that this is not a duplicate, i've tried the following answers in these posts and many others, and it didn't work for me:
How to get path of the php binary on server where it is located
Can't execute PHP script using PHP exec
PHP exec to run a file
How to call shell script from another shell script?
Execute a PHP script from another PHP script
I've also tried using .exe at the end of the binary(windows localmachine), using php-cli instead of php, and i've tested the excec function and it works, but not in this case. Also tried with a shebang in the called script.
It's propably something simple that i'm not aware of but i've been spending a lot of hours searching and testing and nothing so far. Any help is appreciated.
EDIT:
Using scandir on the bin folder shows
scandir("/usr/bin/")
Array(
...
[632] => php
[633] => php-cgi
[634] => php-cli
...
)
Tested if in safe mode using ini_get('safe_mode'), but it seems off.
I fixed it using php-cli instead of php or the php bin path, i must admit that i tried this before but it seems something else was off when i tried this (one of the first things i tried). The answer provided by Keith in Can't execute PHP script using PHP exec , so it ended being a duplicate :S, thanks for the help to those who commented. – Zagen
I have tried to use exec() with 'whoami' to check if it works and I got the result of
nt authority\system
Now I need to run a .exe file with parameters from php via exec() function.
I tried this in command prompt and it actually runs the program with given parameters. This is the example command.
NOTE the exe file gets 3 inputs (folder, file_name, report_file_nmae)
> ..\..\some_file.exe folder="C:\path_to_folder" param=1.xml report=2.xml
But when I run this command from php file:
exec('..\..\some_file.exe folder="C:\path_to_folder" param=1.xml report=2.xml');
nothing is happening. This is the first time I am using exec() function, so I am not familiar with its details. What is wrong?
I tried using:
\\ instead of \
escapeshellarg() on the directory
added "" around directory folder names
No luck
Addendum:
echo exec($command) // echos < .... why?
or
exec($command, $output);
print_r($output); // Array()
I even changed the permission on the file to full control to all users.
If I call the program from command prompt, I can see the icon appearing next to clock for a second.
But the same call from php will not even call the program.
Edit
Even exec('notepad.exe'); is not working. Something has to be done with php configurations maybe?
I already said that I was new to exec() function. After doing some more digging, I came upon 2>&1 which needs to be added at the end of command in exec().
Thanks #mattosmat for pointing it out in the comments too. I did not try this at once because you said it is a Linux command, I am on Windows.
So, what I have discovered, the command is actually executing in the back-end. That is why I could not see it actually running, which I was expecting to happen.
For all of you, who had similar problem, my advise is to use that command. It will point out all the errors and also tell you info/details about execution.
exec('some_command 2>&1', $output);
print_r($output); // to see the response to your command
Thanks for all the help guys, I appreciate it ;)
You might also try giving the full path to the binary you're trying to run. That solved my problem when trying to use ImageMagick.
I tried googling for this issue and found many people with the same problem but no solution.
$result = exec("C:\\Ruby191\\bin\\lessc.bat less\\$file", $output);
Here result is an empty string and output an empty array. Same thing with:
$result = exec("cmd /c C:\\Ruby191\\bin\\lessc.bat less\\$file", $output);
I am sure the path is correct; I am sure exec() is enabled.
I tried exec, shell_exec, system and none work.
lessc is less CSS.
EDIT
The apache error log says:
'"ruby.exe"' is not recognized as an
internal or external command, operable
program or batch file.
I found out the problem; I installed ruby just for this and added it to my PATH environment variable, and it started working immediately for command prompts.
However it didn't work for PHP, so I decided to restart my computer. After that it worked.
First chdir("C:\Ruby191\bin\"), then run lessc.bat.
I am using this php code:
exec("unrar e file.rar",$ret,$code);
and getting an error code of illegal command ie 127 ... but when I am using this command through ssh its working ... because unrar is installed on the server ... so can anyone guess why exec is not doing the right stuff?
Try using the direct path of the application (/usr/bin/unrar of whatever), it sounds like php can't find the application.
If you have chrooted apache and php, you will also want to put /bin/sh into the chrooted environment. Otherwise, the exec() or passthru() will not function properly, and will produce error code 127, file not found.
Since this comes up as a top answer in google, I wanted to share my fix:
The simple fix I had was to disable safe_mode in the php.ini file
; Safe Mode
; http://www.php.net/manual/en/ini.sect.safe-mode.php#ini.safe-mode
safe_mode = Off
thanx all for your response!!
I tried this
//somedir is inside the directory where php file is
chdir("somedir");
exec("/home/username/bin/unrar e /home/path/to/dir/file.rar");
and now it returned no exit code ... oher commands are doing file .. i tried mkdir etc .. :s
Just in case somebody else still gets this problem, take a look at the post here:
http://gallery.menalto.com/node/2639#comment-8638
Quote:
I found the problem. The problem was my security-paranoid OpenBSD. When upgrading from 3.1 to 3.2 they added:
Apache runs chroot'd by default. To disable this, see the new -u option.
The chroot prevented Apache from accessing anything outside of a directory, so I moved everything into the apache directory including netpbm. Everything was accessible and executable, but I guess it was still in some sort of "safe mode" because the exec() always returned 127.
Anyway, running httpd with the -u option went back to the less secure non chroot'd apache startup, which allowed the exec() to work again.
ohkiee guyz thanx ... and yes there might be some errors with $PATH ... but with given full path its working :)
exec("/home/user/bin/unrar e /home/user/xxx/yyy/file.rar");
I did not find the solution for my problem of the same type so sharing what was the cause of it in my Linux setup.
For whatever reason I needed an apache module loaded before other modules and so apache was started with LD_PRELOAD. As exec inherits the environment of the parent process LD_PRELOAD was used for starting the exec-ed program (through sh). Now the preloaded module uses some bindings to apache functions and of course they are not to be present in sh. The result of the php exec was an exit status of 127. The solution was to have in my php file a putenv("LD_PRELOAD") that gets executed before any exec calls.