PHP - System(), Exec() And Passthru() Taking > 10 Seconds To Execute

Hello, I was just seeing if someone could push me in the right direction. I have a form that uploads items to a database and it also includes uploading images to a directory as a part of that. That all works, but I was thinking for security it'd be best not to leave that directory as 0777 for permissions. In researching this I found the exec() function. I'm still figuring out the relation of who the permissions are associated with and why. All I know is if the directory has 0777 for permissions my script works just fine. I was just seeing if using exec to change the permissions during the process of uploading the images and then change back would be cumbersome and leave open other problems (there won't be any user-based input being passed to that) or if that actually would be the way to go for this.

Thanks!
-Frank

I figure I’m doing something basic wrong.
I have this php code.

$cmd = “at $wtime $wdate <<< “sftp -a -r -P xxx xxx@xxx.xxx.net:”.$file.” /mnt/TRFR” ;
exec ($cmd);
echo $cmd;

the “at” command is never generated atq returns blank. But if I copy the output of the echo from the web page into bash the “at” job gets created.

 

What am I missing here?

Edited April 9, 2020 by Henry_Who

i have a bash script that i was running with cron jobs:


#! /bin/bash
 start=1000
 homedir="/home/alin/NetBeansProjects/Fragger2"

 numberofprocess=`expr $start + $2`

 i=$start

 currentnumber=`ps ax |  grep index | grep -c php`

case "$1" in
  start)

        while [ $i -lt $numberofprocess ]
                do
                   if [ `ps axo cmd | grep  index | grep php | grep -c $i` -lt 1 ] ; then

                   
                   /server/php/bin/php $homedir/index.php $i &
                   
                   fi;
                   
                   i=`expr $i + 1`
                   
        done
       ;;
   stop)
        while [ $currentnumber -ne 0 ]
        do
                kill -9 `ps ax | grep php | grep index | awk {'print $1'} | head -n 1`;

                currentnumber=`ps ax |  grep index | grep -c php`
        done
        
      ;;

  *)
echo "Usage : " $0 "start|stop"
        ;;

esac
exit 0



and it was working fine,

now i'm tring to make it run from a page .


if(isset ($_POST['stop'])){
    $conn->update("update `links` set `proccess`=0 ");
    exec("/home/alin/NetBeansProjects/Fragger2/Trans stop 0");
}


if(isset ($_POST['start'])){
    if(!preg_match("/^[0-9]+$/", $_POST['proccess']))
            echo "proccess should be only a number!";
    
    exec("/home/alin/NetBeansProjects/Fragger2/Trans start ".$_POST['proccess']);
}


and i don't know why it is not working,

i have set for this folder all the permision for this folder  "chmod -R 777 /home/alin"

it doesn't stop running and i can't figure out why

i have to kill the procces from the comand line to stop

I'm trying to open a batch file in php with these contents:
Code: [Select]
@echo off
java -classpath rscd.jar;lib/mina.jar;lib/xpp3.jar;lib/slf4j.jar;lib/xstream.jar;lib/hex-string.jar; org.rscdaemon.server.Server
pause

My PHP code is simply
Code: [Select]
$run = "C:\\Users\\Zorian\\Desktop\\EasyRSC\\Server\\run-win.bat";
echo exec("cmd.exe /c " . $run);

It should open up a java applet, instead it just echos:
Code: [Select]
Press any key to continue . . .

Hi guys!

I have a php script that works and outputs info:

<?php
echo exec("uptime");
?>

and another that doesn't output anything:

<?php
echo exec("MP4Box");
?>

Why?

Hey guys i am trying to create a small script using exec() to convert PDF files into images ... The script worked well in the past and for some reasons it staped working.

exec('"C:\\Program Files\\ImageMagick-6.7.1-Q16\\convert.exe" -verbose -density 150 D:\\Inetpub\\www.goulet.ca\\Pub\\Web\\new\\media\\other\\'.$value.' -quality 100 -sharpen 0x1.0 D:\\Inetpub\\www.goulet.ca\\Pub\\Web\\new\\media\\pdf_flipbook\\'.$value.'\\img.png', $out);

the $out var returns an empty array

 have a executable binary to which i pass some dynamic values as hostname,host id,server name,server id and a text field value.

Now i call this binary using exec or shell_exec functions in PHP to stimulate Command executions as a admin.

But i am able to invoke the binary and not able to use psexec service of windows.

I get logs and DB entries successfully but i also have a xml push operation in psexec call that is required.

the format is like ::

exec($url,$output,$return_var);

url is the command path with parameters .
output is an out param and return is the code on execution

this is executed in PHP and i want this binary to generate the same output as done from CLI .

Currently i guess it's a permission issue with shell that disallows psexec call.

How do i invoke the binary with psexec access outside PHP on command shell

I have set access privilege of Powershell  to "unrestricted" so that any script can be executed.

Still it hangs up somewhere in th script causing problems in copying XML file.

Powershell psexec is required in the process and i need to track down the root cause so that php side scripting of binary is successfull.

Please let me know about your ideas in fixing this.

I am using google and trying examples ,but i havent got any feasible solution.

Hope some expert advice can guide me out of this.

I would like PHP to kick off the following command:
Code: [Select]
arp -a|sed 's/ /,/g'>arp.csv
I also have an executable makeArpFile.sh:
Code: [Select]
#!/bin/bash
arp -a|sed 's/ /,/g'>arp.csv
And I have tried executing it in php with the following:
$arp = exec("bash makeArpFile.sh", $output, $exit_code);
echo("Last line: " . $arp . "\n");
echo("Output: " . $output . "\n");
echo("Exit Code: " . $exit_code . "\n");
/*returns:
Last line: 
Output: 
Exit Code: 127
*/

I also tried just plain old:
$arp = exec("makeArpFile.sh", $output, $exit_code);
echo("Last line: " . $arp . "\n");
echo("Output: " . $output . "\n");
echo("Exit Code: " . $exit_code . "\n");
/*returns:
Last line: 
Output: 
Exit Code: 127
*/


I can run plain old arp>arp.txt but I really need it formatted in BSD style (arp -a>arp.txt) in order to be able to parse it properly later.

Any thoughts?

EDIT:
for fun I made a useBash.sh script that executed "bash makeArpFile.sh" still no luck.

Hello i am trying to execute a linux program for every line of a textarea

Code: [Select]
        $text = $_POST['links'];
       
        $text = htmlspecialchars($_POST['links']);
        $text = nl2br($text);
       
        foreach(explode("\n",$text) as $row)
        {
                $result = NULL;
                $command = 'the command';
                exec($command,&$result);
                echo $result[0]."<br>";
        }
but this always print the result for last line of text area
for example if there are 3 lines it print 2 blanks and 1 result...
whats wrong??

Hi,

I have a java file that needs to be executed from my php script, the command I have in it works perfectly when I execute directly in the command line, but when I execute it from php it returns this: array(0) { }

I have tested that the exec works by using antiword, which does return results as expected, but its not working for the code below.
But I would much rather use apache tika.

Also your thoughts on whether this is good practice please. I am using this to extract text from CV's and store that in the db to be able to search through. I need to extract from: pdf, doc, rtf and docx. this is the only tool I have found that can handle them all.

your help on the exec problem and any suggestions will be much appreciated.

Code: [Select]
<?php
   exec('java -jar /etc/tika-app-1.0.jar -t /var/www/html/cvdatabase/400001.doc', $output);
   var_dump($output);
?>

Hi all.

I tried to execute command below
` echo '<br/>'.$data. " >=> " . exec("java -jar encrypt.jar ".$data." ".$privateKey, $key);`
it's look like we run `java -jar encrypt.jar 192.168.101.1BBB10052 ssdsds`
I can run this command on the server by ssh but when I use PHP code, it's nothing.
so I need to enale the exec function or different command on this version?

is there a way to excute the system() command here but not wait for it and just let it go in the background? And something that wont boggle down the system too much? Thanks!

Code: [Select]
$this->db->insert('jukebox', $data);
echo '1';

system('ffmpeg -i ' . $id . '.mp3 -acodec libvorbis -aq 60 ' . $id . '.ogg');

Folks,

I am running Linux Commands in PHP.

I am looping through the Domain list and using the below line in my Script:



exec('cp -r '.$source.' '.$destination);



I am using this in a Foreach Statment, so only the last Even in the loop getting executed, because, the loop is running too fast so the Linux command does not even get initiated, only the last even in loop goes through.

What i have done is, i have added a line after exec();

sleep(30);

This gives enough time for Linux command to get executed, but is it efficient way to handle timing liek this?

Do i need to use time_limit() or something like that?

Cheers
Natasha

I've got a mailing list (uses DadaMail) which provides a perl script (subscribe_email.pl) so that I can pass subscribers to it thorugh a PHP script.

Info he http://dadamailproject.com/support/documentation-5_0_1/COOKBOOK-subscriptions.pod.html#command_line_utility___subscribe_email_pl

The trouble is I can get it working when variables are passed to it via URL query strings, but when I try to hard-code variables into it it stops working. I can't see any reason for this, it's got me really confused.

This works: -

Code: [Select]
<?php
// example usage: -
// http://www.domain.com/ds1.php?sendto=user@domain.com&title=Mr&forename=John&surname=Doe&company=None&country=UK

if (isset($_GET['sendto'])) {
$email = $_GET['sendto'];
}

if (isset($_GET['title'])) {
$title = preg_replace("/[^A-Za-z ]/", "", $_GET['title']);
}

if (isset($_GET['forename'])) {
$forename = preg_replace("/[^A-Za-z\-. ]/", "", $_GET['forename']);
}

if (isset($_GET['surname'])) {
$surname = preg_replace("/[^A-Za-z\-. ]/", "", $_GET['surname']);
}

if (isset($_GET['company'])) {
$company = preg_replace("/[^A-Za-z()\-.& ]/", "", $_GET['company']);
$company = str_replace('&', 'and', $company);
}

if (isset($_GET['country'])) {
$country = preg_replace("/[^A-Za-z\-.& ]/", "", $_GET['country']);
$country = str_replace('&', 'and', $country);
}

if (isset($email)) {
$exec_command = 'perl ./subscribe_email.pl --list mylist --email '. $email;
if (isset($title)) $exec_command .= ' --fields title '. $title;
if (isset($forename)) $exec_command .= ' --fields forename '. $forename;
if (isset($surname)) $exec_command .= ' --fields surname '. $surname;
if (isset($company)) $exec_command .= ' --fields company '. $company;
if (isset($country)) $exec_command .= ' --fields country '. $country;
exec(escapeshellcmd($exec_command));
} else {
echo 'Nothing to do';
}
?>
The mail address and all the parameters are passed to the subscribe_email.pl script.

But, this doesn't work: -

Code: [Select]
<?php
$subscriber_email = 'user@domain.com';
$subscriber_title = 'Mr';
$subscriber_forename = 'John';
$subscriber_surname = 'Doe';
$subscriber_company = 'None';
$subscriber_country = 'UK';

if (isset($subscriber_email)) {
$email = escapeshellcmd($subscriber_email);
}

if (isset($subscriber_title)) {
$title = preg_replace("/[^A-Za-z ]/", "", $subscriber_title);
}

if (isset($subscriber_forename)) {
$forename = preg_replace("/[^A-Za-z\-. ]/", "", $subscriber_forename);
}

if (isset($subscriber_surname)) {
$surname = preg_replace("/[^A-Za-z\-. ]/", "", $subscriber_surname);
}

if (isset($subscriber_company)) {
$company = preg_replace("/[^A-Za-z()\-. ]/", "", $subscriber_company);
$company = str_replace('&', 'and', $company);
}

if (isset($subscriber_country)) {
$country = preg_replace("/[^A-Za-z\-. ]/", "", $subscriber_country);
$country = str_replace('&', 'and', $country);
}

if (isset($email)) {
$exec_command = 'perl ./subscribe_email.pl --list mylist --email '. $email;
if (isset($title)) $exec_command .= ' --fields title '. $title;
if (isset($forename)) $exec_command .= ' --fields forename '. $forename;
if (isset($surname)) $exec_command .= ' --fields surname '. $surname;
if (isset($company)) $exec_command .= ' --fields company '. $company;
if (isset($country)) $exec_command .= ' --fields country '. $country;
exec(escapeshellcmd($exec_command));
} else {
echo 'Nothing to do';
}
?>
In the second example, only the list and email parameters are passed, all the others are lost (or ignored).

All that's different between the two is the way the variables are inititally set, I can't for the life of me figure out why the second one isn't working  .

Even stranger, I tried testing with just: -

Code: [Select]
<?php
exec("perl ./subscribe_email.pl --list mylist --email user@domain.com --fields title Mr --fields forename John--fields surname Doe --fields company None --fields country UK")
?>
and this doesn't work fully either (again just the list and email parameters are passed).

Unfortunately, it's the second method I need to use as it's tagged on to the end of a contact form processing script which initiates the subscription if a checkbox is left ticked...and all variables will be coming from this form script.

Any help greatly appreciated!

I want to do something like the following:

exec('open /Applications/Safari.app');



I can run exec on other commands like:


$output = exec('ls -ll);
echo $output;


And I can run the open command via Terminal, but I can't seem to run the open command via a PHP page using exec().

I've tried the permissions of the .app file at 777 and the open binary at 777.

Any suggestions?