Problem with exec()

[daniel-arrick]

I'm trying to run shell commands using exec/shell_exec but I get errors like:

/bin/ls: /bin/ls: cannot execute binary file

Some sort of environment configuration I am missing?

Thank you

[jakubmisek]

exec/shell_exec is somehow supported, but it may be not tested on Linux and macOs.

What environment and what shell command are you running?

[daniel-arrick]

I use MacOS for development and linux for deployment. At first I was trying to use aws cli commands but those failed due to problems with running python scripts from exec(). Then I tried something more rudimentary like "ls" and that failed so it seems like a more general issue with the environment.
Example response from "ls" command: /bin/ls: /bin/ls: cannot execute binary file

[jakubmisek]

quick question - how is this issue related to WordPress?

[daniel-arrick]

Do you mean what I am trying to accomplish?
What I am trying to accomplish is a way to manage my media content on AWS S3. I cannot find a plugin that is natively supported by the Peachpie compiler mostly due to yielding from try catch finally in the PHP AWS SDK is not supported I believe. That leads me to trying the command line interface and investigating how I can integrate it using hooks ands filters.

[jakubmisek]

oh so you are implementing your WordPress plugin?

AFAIK yielding from try catch is easy to workaround:

try
{
  yield $x;
}

->

try
{
  $value = $x;
}
yield $value

it just have to be done manually, compiler does not have this kind of analysis (yet).

[daniel-arrick]

Ok thanks for the tip! I'll have to try that out.
I missed you added unix shell support in the comment above. Thank you again, I will test it out the new compiler soon

[daniel-arrick]

Thank you for releasing the new compiler with unix shell support.
After lots of trials I found that in order to execute a command with arguments I needed to surround the entire command with double quotes.

This works
shell_exec("ls");

This fails as the "-l" flag is excluded for some reason
shell_exec("ls -l");

This works
$cmd = "ls -l";
shell_exec("\"$cmd\"");

This works
shell_exec('"ls -l"');

[jakubmisek]

thanks daniel! great tips, this should be easy to fix for us

[jakubmisek]

should be fixed in the latest update :) please let me know if it still fails