in reply to fastcgi stderr redirect problems

Hello zuser,

some (more) code would be handy. Otherwise, we have to guess.

But as for just guessing, you localize LCSTDERR to your subroutine block. I wonder whether that's sensible.

At which point do you invoke redirect_elog? Do you have a global *LCSTDERR ?

What happens if you just open(STDERR, ">>$file") or die - does the behaviour persist?

--shmem 

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

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Re^2: fastcgi stderr redirect problems
by zuser (Initiate) on Aug 17, 2006 at 17:35 UTC
    Hello shmem,

    Thanks for you reply.

    i call redirect_elog the first thing in the program and i tried the other approach too ie  open(STDERR, ">>$file") or die, it still gives the same problem.

    The code i have is something like this. 
    #!/usr/local/bin/perl -wT

use strict;
use TEST::App::MainApp;

$SIG{__WARN__} = \&warn_handler;


redirect_error_log("/export/home/rdave/logs/error_log");
my $app = TEST::App::MainApp()
$app->run_loop();

use constant MAX_MSGLEN => 1022;

sub warn_handler
{
    my $msg = join "", @_;
   # print to STDERR
    $msg = "[" . "$$|" . time2iso() . "] " . $msg;

    # send in chunks, if necessary
    while (length $msg > MAX_MSGLEN) {
        my $chunk = substr($msg, 0, MAX_MSGLEN);
        $msg = substr($msg, MAX_MSGLEN);
        warn $chunk, "\n";
    }
    warn $msg;
}

    [download]
    Then in the run_loop in another package 

    sub run_loop
{
    my ($self) = @_;

    my $requester = $self->requester;
    $self->{_REQUEST_NUMBER}=0;
    # initialize the request counter
    while (my $input = $requester->new_request()) {

        $self->_reset_timings;

        # start request timing
        begin_timing('REQUEST');

        $self->scratch->init;

        ++$self->{_REQUEST_NUMBER};
        warn "[--] Starting a new request $self->{_REQUEST_NUMBER} (Cl
+ient: $ENV{REMOTE_ADDR}) ...\n";

        $self->{_INPUT} = $input;

        # read application configuration
        $self->config_object->getConfig($self->name());

        # process request
        $self->_process_request;

        # finish the request
        $requester->close_request();

        $self->invoke_post_request_callbacks;

        # end request timing
        $self->timing('REQUEST', time_since('REQUEST'));

        
        warn "[--] Finished handling request $self->{_REQUEST_NUMBER} 
+...\n";

        $self->post_request;

}

    [download]
    I am not changing or redirecting STDERR anywhere else in the program other than the first time. In the above code snippet the first warn goes to /usr/local/apache/logs/error_log and the bottom one goes to local log file. The code is spread over 1000s of lines, so sorry could'nt post it, but one thing is sure, that the program is not touching STDERR/redirect_elog/LCSTDERR elsewhere and this one works fine with perl 5.6.1 and behaving this way with perl 5.8.5
[reply]
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[select]
      Sorry for the delay.

      Hint: You set up a SIG{__WARN__} handler. Inside the handler subroutine you call warn. What is perl supposed to do at this point? Does it just warn or does it call the handler subroutine? What is in $SIG{__WARN__} after the call to the handler subroutine? What is fileno 2 in the handler subroutine?

      Since you are calling redirect_error_log only once at the beginning of the app, you should put the code of that sub into a BEGIN block to avoid confusion.

      --shmem 

      _($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}
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