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Published on 2010-03-31T16:49:02Z
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2010/03/31
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Are there any counterindications to fork under mod_perl2? Should one use another way to run background process under mod_perl2?
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From Ubuntu's package libary, I find the two modules I need. However:
mod-perl2 requires apache2-mpm-worker
mod-php5 requires apache2-mpm-prefork
The two apache modules are mutually exclusive and ask me to un-install the other in order to install each. Which means I can't get a server running…
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I have a mod_perl script:
use strict;
use warnings FATAL => 'all';
use 5.010001;
my $face = 'ugly';
use Data::Dump qq(pp);
die pp($ModPerl::ROOT::ModPerl::Registry::C_3a_www_test_2epl::face);
It dies undef at C:/www/test.pl line 8.
I was expecting "ugly" at C:/www/test.pl line 8.
If instead…
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The following script works without errors, but /tmp/test.touch is not being created (even being checked later in the command line). It seems to me as if $r->spawn_proc_prog doesn't spawn a process. What may cause the problem?
#!/usr/bin/perl
use strict;
use warnings;
use Apache2::RequestUtil;
use…
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I have a module that uses IPC::Open3 (or IPC::Open2, both exhibit this problem) to call an external binary (bogofilter in this case) and feed it some input via the child-input filehandle, then reads the result from the child-output handle. The code works fine when run in most environments. However…
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I have a problem when I use Apache::DBI in child processes. The problem is that Apache::DBI provides a single handle for all processes which use it, so I get
DBD::mysql::db selectall_arrayref
failed: Commands out of sync; you
can't run this command now at
/usr/local/www/apache22/data/test-fork…
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Hi
Is there any way to differentiate the child processes created by different fork() functions within a program.
global variable i;
SIGCHLD handler function()
{
i--;
}
handle()
{
fork() --> FORK2
}
main()
{
while(1)
{
if(i<5)
{
i++;
if( (fpid=fork())==0)…
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I just came to realize that my system is not limiting the amount of processes per user properly thus not preventing a user from dring a fork-bomb and crashing the entire system:
user@thebe:~$ cat /etc/security/limits.conf | grep user
user hard nproc 512
user@thebe:~$ ulimit -u
1024
user@thebe:~$…
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I'm using fork() on PERL in windows (activeperl) for a basic socket server, but apparently there are problems (it won't accept connections after a few times), is there any workaround?
while($client = $bind->accept()) {
$client->autoflush();
if(fork()){ $client->close(); }
else…
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When reading about pipes in Advanced Programming in the UNIX Environment, I noticed that after a fork that the parent can close() the read end of a pipe and it doesn't close the read end for the child. When a process forks, does its file descriptors get retained? What I mean by this is that before…
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I know that fork() returns differently for the son and father processes, but I'm unable to find information on how this happens. How does the son process receive the return value 0 from fork? And what is the difference in regards to the call stack? As I understand it, for the father it goes something…
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