Re: Proc::Daemon not detaching

Hi Dave,

I used to start daemons with Apache 1.x.x, but those days seem over. With Apache 2.x.x, I have not been able to do this. Maybe there is a Apache configuration parameter to allow this, but I have had to change a lot of cgi scripts because of this.

My solution was to start a long running daemon before or at Apache startup that monitors a file for commands from the cgi scripts. This daemon does not execute the commands, but forks a copy to execute the command. Note: Make sure you put a 'sleep' or 'usleep' in the test loop.

Apache2 doesn't know the daemon exists, and it works.

Regards...Ed

"Well done is better than well said." - Benjamin Franklin

Comment on Re: Proc::Daemon not detaching

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Re^2: Proc::Daemon not detaching (exec perl) by tye (Sage) on Mar 20, 2014 at 14:53 UTC
If the problem is Apache's doing, then you should first get Apache out of your hair before you daemonize. That will prevent Apache from having replaced fork() or POSIX::setsid() or other shenanigans that I wouldn't put past them. `if( ! @ARGV ) { # CGI code here my $pid = CORE::fork(); die "Can't fork: $!\n" if ! defined $pid; exit # or return, or whatever makes most sense to finish CGI p +art if $pid; CORE::exec( 'perl', $0, 'daemon' ); die "Can't exec perl: $!\n"; } # Rest of code here` [download] - tye	[reply] [d/l]

Replies are listed 'Best First'.

Re^2: Proc::Daemon not detaching (exec perl)
by tye (Sage) on Mar 20, 2014 at 14:53 UTC

If the problem is Apache's doing, then you should first get Apache out of your hair before you daemonize. That will prevent Apache from having replaced fork() or POSIX::setsid() or other shenanigans that I wouldn't put past them.

if(  ! @ARGV  ) {
    # CGI code here
    my $pid = CORE::fork();
    die "Can't fork: $!\n"
        if  ! defined $pid;
    exit     # or return, or whatever makes most sense to finish CGI p
+art
        if  $pid;
    CORE::exec( 'perl', $0, 'daemon' );
    die "Can't exec perl: $!\n";
}
# Rest of code here
[download]

- tye

[reply]
[d/l]