Re: Start/stop daemon using php

Hi, You might consider D-BUS for your application and the D-BUS PHP binding which is available since some days too. This would allow you to start / stop your C application in a far more secure way than the suggested one. Please have a look at my original release annoucement at the D-BUS mailing list: http://lists.freedesktop.org/archives/dbus/2008-February/009363.html as well as the download URL: https://sourceforge.net/project/showfiles.php?group_id=17176&package_id=68954 Even if the application runs on Windows you might be able to use D-BUS for communication. Daniel Brown schrieb: > On Wed, Feb 27, 2008 at 7:51 AM, David Sveningsson <ext@sidvind.com> wrote: >> Hi, I've written an application in c which I would like to start/stop as >> a daemon in gnu/linux. >> >> The application has the argument "--daemon" which forks the process and >> exits the parent. Then it setups a SIGQUIT signal handler to properly >> cleanup and terminate. It also maintains a lockfile (with the pid) so >> only one instance is allowed. >> >> So, to start this application I created a php site that calls >> exec("/path/to/binary --daemon > /dev/null 2> /dev/null"). > > You can (and should) write this out like so: > <? > exec("/path/to/binary --daemon >> /dev/nul 2>&1",$ret,$err); > ?> > > The >> means to append to the end of a file. You can use > on > /dev/null, since it's not a file, but just a black hole, but you may > want to get into the habit of redirecting and appending. The 2>&1 > redirects channel 2 (STDERR) to channel 1 (STDOUT) so that all output > in this case is sent to /dev/null. For any output that would > otherwise be generated, $ret will hold STDOUT data, and $err will hold > the STDERR code. > >> Everything is working so far, but I cannot get the application to >> receive the SIGQUIT when I start using php and exec. Not even manually >> using kill in the shell. It works correctly if I start manually thought. >> >> So, is this possible to do? Doesn't exec allow applications with signal >> handlers? Is there some other way to terminate the application? > > You may want to launch it from a BASh script. I had written out > an example for someone on this list at the beginning of the month. > Feel free to check it out and use it, or use any part of it: > > [Download] http://pilotpig.net/code-library/daemonize.sh > [View Source] > http://pilotpig.net/code-library/source.php?f=daemonize.sh >