Re: Logging out

Update

Well, the following snippet of code is pretty ugly, but it seems to work. It is executed by the server program in response to a command from the client via SOAP.

my @ps = `ps -ef`;
my @pid = (split(/ +/, (grep(/login -- mrc/, @ps))[0]))[1];
my @kill;
while (1) {
  last unless @pid = grep {$_ > 1} @pid;
  push @kill, @pid;
  my $pidlist = join('|', @pid);
  last unless @pid = grep(/\s+[\d]+\s+($pidlist) /, @ps);
  @pid = map {(split(/\s+/, $_))[1]} @pid;
}
kill 'TERM', @kill
[download]

What this does is get a list of all running processes, finds one named "login -- mrc", then goes through the list looking for all its children, children's children, etc. Once it's done this, it kills them all. Ugh.

Comment on Re: Logging out Download Code

Replies are listed 'Best First'.
Re: Re: Logging out by rob_au (Abbot) on Oct 28, 2001 at 10:09 UTC
As I'm a great proponent of implementing in Perl rather than relying on external programs, I came up with the following more generic code which is a bit cleaner in that it doesn't depend on the external execution of `ps` : `sub killchd ($;$) { use Proc::ProcessTable; my $sig = ($_[1] =~ /^\-?\d+$/) ? $_[1] : 0; my $proc = Proc::ProcessTable->new; my %fields = map { $_ => 1 } $proc->fields; return undef unless exists $fields{'ppid'}; foreach (@{$proc->table}) { kill $sig, $_->pid if ($_->ppid == $_[0]); }; kill $sig, $_[0]; };` [download] This subroutine takes two arguments, the parent process ID and the numeric signal to pass to the processes (which would be `9` if you wanted to issue a `-TERM`). Using Proc::Process you could find the process ID of the process `login -- mrc` with something similar to the following : `my $proc = Proc::ProcessTable->new; my @ps = map { $_->pid if ($_->cmndline =~ /login -- mrc/) } @{$proc-> +table}; &killchd($_, 9) foreach @ps;` [download] Ooohhh, Rob no beer function well without!	[reply] [d/l] [select]
Re: Re: Re: Logging out by Dr. Mu (Hermit) on Oct 30, 2001 at 08:36 UTC
Yes, I like that much better. Thanks!	[reply]


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