Re: Re: PHP hangs when exec'ing SSH

Richard, I'm really not sure what you're asking here. I've created a limited access user account on a remote host so that I can kick off some things on the remote host by hitting a web page. Access to the web page is protected via SSL and user authentication. The things which are executed on the remote host are special purpose programs I am building, not general commands, and no place does the web page provide a user direct control over what programs are run. "su" was only used by me from the command-line to become the same user the web-server runs under in order that I would get the same public/private key authentication under SSH as I do when the script runs as a web page. It is not involved in what the php code runs. Take a look at the bug report to see a completely reduced test-case which reproduces the problem I'm seeing. --Ross Richard Lynch wrote:

I actually do care about the return code from the program, as well as knowing that the program executed and completed successfully, so background execution is not a valid option. I tried using system("ssh user@host mycommand > /dev/null 2>&1") and got the same results. You are correct that I am using "su" to become the same user that the web server runs under, after temporarily changing the password file to give said user a valid shell. I can verify that the shell does not affect whether this problem occurs or not, and I have determined that the SSH process is not left lying around after it executes- The remote command is run, ssh executes, PHP simply never comes back. Bug link is here: http://bugs.php.net/bug.php?id=22946 At this point I'd love to hear from anyone running a different version of PHP, OS, or Apache who can actually execute this to find out if they experience results which are the same or different.

I believe 'su' requires an actual TTY connection or it aborts... Could be wrong. "man su" Why are you doing ssh anyway? scp, maybe, but... Sure you're not taking web-based user into and then doing SSH to execute it on a different server?... [shudder]