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mariadb/mysql-test/lib/mtr_process.pl
unknown f4d209b015 Partial fix for BUG#14106: IM: im_life_cycle and im_utils 
tests fail on FreeBSD.

The patch contains of the following:
  - make Instance Manager, running in the daemon mode, dump
    the pid of angel-process in the special file;
  - default value of angel-pid-file-name is 'mysqlmanager.angel.pid';
  - if ordinary (IM) pid-file-name is specified in the configuration,
    angel-pid-file-name is updated according to the following
    rule: extension of the basename of pid-file-name is replaced by
    '.angel.pid.
    For example:
    - pid-file-name: /tmp/im.pid
      => angel-pid-file-name: /tmp/im.angel.pid
    - pid-file-name: /tmp/im.txt
      => angel-pid-file-name: /tmp/im.angel.pid
    - pid-file-name: /tmp/5.0/im
      => angel-pid-file-name: /tmp/5.0/im.angel.pid
  - add support for configuration option to customize angel
    pid file name;
  - fix test suite to use angel pid to kill Instance Manager
    by all means if something went wrong.

Background
----------

The problem is that on some OSes (FreeBSD for one) Instance
Manager does not get SIGTERM, so can not shutdown gracefully.
Test suite wasn't able to cope with it, so this leads to the
mess in test results.

The problem should be split into two:
  - fix signal handling;
  - fix test suite.

This patch fixes test suite so that it will be able to kill
uncooperative Instance Manager. In order to achieve this,
test suite needs to know PID of IM Angel process.


mysql-test/lib/mtr_process.pl:
  Added a function to send a signal to a process.
mysql-test/mysql-test-run.pl:
  Changed procedure of stopping Instance Manager.
  1. Try to stop IM normally (by sending SIGTERM);
  2. If one of IM-related processes is still alive,
  kill them all by SIGKILL and complain in the log.
server-tools/instance-manager/manager.cc:
  Made create_pid_file() available for the whole project.
server-tools/instance-manager/manager.h:
  Made create_pid_file() available for the whole project.
server-tools/instance-manager/mysqlmanager.cc:
  Dump PID of angel process into file.
server-tools/instance-manager/options.cc:
  Added an option to allow to customize angel pid file name.
server-tools/instance-manager/options.h:
  Added an option to allow to customize angel pid file name.
2006-05-06 13:57:56 +04:00

937 lines
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Perl
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# -*- cperl -*-
# This is a library file used by the Perl version of mysql-test-run,
# and is part of the translation of the Bourne shell script with the
# same name.
#use Carp qw(cluck);
use Socket;
use Errno;
use strict;
#use POSIX ":sys_wait_h";
use POSIX 'WNOHANG';
sub mtr_run ($$$$$$;$);
sub mtr_spawn ($$$$$$;$);
sub mtr_stop_mysqld_servers ($);
sub mtr_kill_leftovers ();
sub mtr_record_dead_children ();
sub mtr_exit ($);
sub sleep_until_file_created ($$$);
sub mtr_kill_processes ($);
sub mtr_kill_process ($$$$);
# static in C
sub spawn_impl ($$$$$$$$);
##############################################################################
#
# Execute an external command
#
##############################################################################
# This function try to mimic the C version used in "netware/mysql_test_run.c"
# FIXME learn it to handle append mode as well, a "new" flag or a "append"
sub mtr_run ($$$$$$;$) {
my $path= shift;
my $arg_list_t= shift;
my $input= shift;
my $output= shift;
my $error= shift;
my $pid_file= shift;
my $spawn_opts= shift;
return spawn_impl($path,$arg_list_t,'run',$input,$output,$error,$pid_file,
$spawn_opts);
}
sub mtr_run_test ($$$$$$;$) {
my $path= shift;
my $arg_list_t= shift;
my $input= shift;
my $output= shift;
my $error= shift;
my $pid_file= shift;
my $spawn_opts= shift;
return spawn_impl($path,$arg_list_t,'test',$input,$output,$error,$pid_file,
$spawn_opts);
}
sub mtr_spawn ($$$$$$;$) {
my $path= shift;
my $arg_list_t= shift;
my $input= shift;
my $output= shift;
my $error= shift;
my $pid_file= shift;
my $spawn_opts= shift;
return spawn_impl($path,$arg_list_t,'spawn',$input,$output,$error,$pid_file,
$spawn_opts);
}
##############################################################################
#
# If $join is set, we return the error code, else we return the PID
#
##############################################################################
sub spawn_impl ($$$$$$$$) {
my $path= shift;
my $arg_list_t= shift;
my $mode= shift;
my $input= shift;
my $output= shift;
my $error= shift;
my $pid_file= shift; # FIXME
my $spawn_opts= shift;
if ( $::opt_script_debug )
{
print STDERR "\n";
print STDERR "#### ", "-" x 78, "\n";
print STDERR "#### ", "STDIN $input\n" if $input;
print STDERR "#### ", "STDOUT $output\n" if $output;
print STDERR "#### ", "STDERR $error\n" if $error;
print STDERR "#### ", "$mode : $path ", join(" ",@$arg_list_t), "\n";
print STDERR "#### ", "spawn options:\n";
if ($spawn_opts)
{
foreach my $key (sort keys %{$spawn_opts})
{
print STDERR "#### ", " - $key: $spawn_opts->{$key}\n";
}
}
else
{
print STDERR "#### ", " none\n";
}
print STDERR "#### ", "-" x 78, "\n";
}
FORK:
{
my $pid= fork();
if ( ! defined $pid )
{
if ( $! == $!{EAGAIN} ) # See "perldoc Errno"
{
mtr_debug("Got EAGAIN from fork(), sleep 1 second and redo");
sleep(1);
redo FORK;
}
else
{
mtr_error("$path ($pid) can't be forked");
}
}
if ( $pid )
{
spawn_parent_impl($pid,$mode,$path);
}
else
{
# Child, redirect output and exec
# FIXME I tried POSIX::setsid() here to detach and, I hoped,
# avoid zombies. But everything went wild, somehow the parent
# became a deamon as well, and was hard to kill ;-)
# Need to catch SIGCHLD and do waitpid or something instead......
$SIG{INT}= 'DEFAULT'; # Parent do some stuff, we don't
if ( $::glob_cygwin_shell and $mode eq 'test' )
{
# Programs started from mysqltest under Cygwin, are to
# execute them within Cygwin. Else simple things in test
# files like
# --system "echo 1 > file"
# will fail.
# FIXME not working :-(
# $ENV{'COMSPEC'}= "$::glob_cygwin_shell -c";
}
my $log_file_open_mode = '>';
if ($spawn_opts and $spawn_opts->{'append_log_file'})
{
$log_file_open_mode = '>>';
}
if ( $output )
{
if ( ! open(STDOUT,$log_file_open_mode,$output) )
{
mtr_child_error("can't redirect STDOUT to \"$output\": $!");
}
}
if ( $error )
{
if ( $output eq $error )
{
if ( ! open(STDERR,">&STDOUT") )
{
mtr_child_error("can't dup STDOUT: $!");
}
}
else
{
if ( ! open(STDERR,$log_file_open_mode,$error) )
{
mtr_child_error("can't redirect STDERR to \"$error\": $!");
}
}
}
if ( $input )
{
if ( ! open(STDIN,"<",$input) )
{
mtr_child_error("can't redirect STDIN to \"$input\": $!");
}
}
if ( ! exec($path,@$arg_list_t) )
{
mtr_child_error("failed to execute \"$path\": $!");
}
}
}
}
sub spawn_parent_impl {
my $pid= shift;
my $mode= shift;
my $path= shift;
if ( $mode eq 'run' or $mode eq 'test' )
{
if ( $mode eq 'run' )
{
# Simple run of command, we wait for it to return
my $ret_pid= waitpid($pid,0);
if ( $ret_pid <= 0 )
{
mtr_error("$path ($pid) got lost somehow");
}
return mtr_process_exit_status($?);
}
else
{
# We run mysqltest and wait for it to return. But we try to
# catch dying mysqld processes as well.
#
# We do blocking waitpid() until we get the return from the
# "mysqltest" call. But if a mysqld process dies that we
# started, we take this as an error, and kill mysqltest.
#
# FIXME is this as it should be? Can't mysqld terminate
# normally from running a test case?
my $exit_value= -1;
my $saved_exit_value;
my $ret_pid; # What waitpid() returns
while ( ($ret_pid= waitpid(-1,0)) != -1 )
{
# Someone terminated, don't know who. Collect
# status info first before $? is lost,
# but not $exit_value, this is flagged from
#
my $timer_name= mtr_timer_timeout($::glob_timers, $ret_pid);
if ( $timer_name )
{
if ( $timer_name eq "suite" )
{
# We give up here
# FIXME we should only give up the suite, not all of the run?
print STDERR "\n";
mtr_error("Test suite timeout");
}
elsif ( $timer_name eq "testcase" )
{
$saved_exit_value= 63; # Mark as timeout
kill(9, $pid); # Kill mysqltest
next; # Go on and catch the termination
}
}
if ( $ret_pid == $pid )
{
# We got termination of mysqltest, we are done
$exit_value= mtr_process_exit_status($?);
last;
}
# If one of the mysqld processes died, we want to
# mark this, and kill the mysqltest process.
foreach my $idx (0..1)
{
if ( $::master->[$idx]->{'pid'} eq $ret_pid )
{
mtr_debug("child $ret_pid was master[$idx], " .
"exit during mysqltest run");
$::master->[$idx]->{'pid'}= 0;
last;
}
}
foreach my $idx (0..2)
{
if ( $::slave->[$idx]->{'pid'} eq $ret_pid )
{
mtr_debug("child $ret_pid was slave[$idx], " .
"exit during mysqltest run");
$::slave->[$idx]->{'pid'}= 0;
last;
}
}
mtr_debug("waitpid() catched exit of unknown child $ret_pid, " .
"exit during mysqltest run");
}
if ( $ret_pid != $pid )
{
# We terminated the waiting because a "mysqld" process died.
# Kill the mysqltest process.
kill(9,$pid);
$ret_pid= waitpid($pid,0);
if ( $ret_pid == -1 )
{
mtr_error("$path ($pid) got lost somehow");
}
}
return $saved_exit_value || $exit_value;
}
}
else
{
# We spawned a process we don't wait for
return $pid;
}
}
# ----------------------------------------------------------------------
# We try to emulate how an Unix shell calculates the exit code
# ----------------------------------------------------------------------
sub mtr_process_exit_status {
my $raw_status= shift;
if ( $raw_status & 127 )
{
return ($raw_status & 127) + 128; # Signal num + 128
}
else
{
return $raw_status >> 8; # Exit code
}
}
##############################################################################
#
# Kill processes left from previous runs
#
##############################################################################
# We just "ping" on the ports, and if we can't do a socket connect
# we assume the server is dead. So we don't *really* know a server
# is dead, we just hope that it after letting the listen port go,
# it is dead enough for us to start a new server.
sub mtr_kill_leftovers () {
# First, kill all masters and slaves that would conflict with
# this run. Make sure to remove the PID file, if any.
# FIXME kill IM manager first, else it will restart the servers, how?!
my @args;
for ( my $idx; $idx < 2; $idx++ )
{
push(@args,{
pid => 0, # We don't know the PID
pidfile => $::instance_manager->{'instances'}->[$idx]->{'path_pid'},
sockfile => $::instance_manager->{'instances'}->[$idx]->{'path_sock'},
port => $::instance_manager->{'instances'}->[$idx]->{'port'},
});
}
for ( my $idx; $idx < 2; $idx++ )
{
push(@args,{
pid => 0, # We don't know the PID
pidfile => $::master->[$idx]->{'path_mypid'},
sockfile => $::master->[$idx]->{'path_mysock'},
port => $::master->[$idx]->{'path_myport'},
});
}
for ( my $idx; $idx < 3; $idx++ )
{
push(@args,{
pid => 0, # We don't know the PID
pidfile => $::slave->[$idx]->{'path_mypid'},
sockfile => $::slave->[$idx]->{'path_mysock'},
port => $::slave->[$idx]->{'path_myport'},
});
}
mtr_mysqladmin_shutdown(\@args, 20);
# We now have tried to terminate nice. We have waited for the listen
# port to be free, but can't really tell if the mysqld process died
# or not. We now try to find the process PID from the PID file, and
# send a kill to that process. Note that Perl let kill(0,@pids) be
# a way to just return the numer of processes the kernel can send
# signals to. So this can be used (except on Cygwin) to determine
# if there are processes left running that we cound out might exists.
#
# But still after all this work, all we know is that we have
# the ports free.
# We scan the "var/run/" directory for other process id's to kill
# FIXME $path_run_dir or something
my $rundir= "$::opt_vardir/run";
if ( -d $rundir )
{
opendir(RUNDIR, $rundir)
or mtr_error("can't open directory \"$rundir\": $!");
my @pids;
while ( my $elem= readdir(RUNDIR) )
{
my $pidfile= "$rundir/$elem";
if ( -f $pidfile )
{
my $pid= mtr_get_pid_from_file($pidfile);
# Race, could have been removed between I tested with -f
# and the unlink() below, so I better check again with -f
if ( ! unlink($pidfile) and -f $pidfile )
{
mtr_error("can't remove $pidfile");
}
if ( $::glob_cygwin_perl or kill(0, $pid) )
{
push(@pids, $pid); # We know (cygwin guess) it exists
}
}
}
closedir(RUNDIR);
if ( @pids )
{
if ( $::glob_cygwin_perl )
{
# We have no (easy) way of knowing the Cygwin controlling
# process, in the PID file we only have the Windows process id.
system("kill -f " . join(" ",@pids)); # Hope for the best....
mtr_debug("Sleep 5 seconds waiting for processes to die");
sleep(5);
}
else
{
my $retries= 10; # 10 seconds
do
{
kill(9, @pids);
mtr_debug("Sleep 1 second waiting for processes to die");
sleep(1) # Wait one second
} while ( $retries-- and kill(0, @pids) );
if ( kill(0, @pids) ) # Check if some left
{
mtr_warning("can't kill process(es) " . join(" ", @pids));
}
}
}
}
# We may have failed everything, bug we now check again if we have
# the listen ports free to use, and if they are free, just go for it.
foreach my $srv ( @args )
{
if ( mtr_ping_mysqld_server($srv->{'port'}, $srv->{'sockfile'}) )
{
mtr_warning("can't kill old mysqld holding port $srv->{'port'}");
}
}
}
##############################################################################
#
# Shut down mysqld servers we have started from this run of this script
#
##############################################################################
# To speed things we kill servers in parallel. The argument is a list
# of 'ports', 'pids', 'pidfiles' and 'socketfiles'.
# FIXME On Cygwin, and maybe some other platforms, $srv->{'pid'} and
# $srv->{'pidfile'} will not be the same PID. We need to try to kill
# both I think.
sub mtr_stop_mysqld_servers ($) {
my $spec= shift;
# ----------------------------------------------------------------------
# First try nice normal shutdown using 'mysqladmin'
# ----------------------------------------------------------------------
# Shutdown time must be high as slave may be in reconnect
mtr_mysqladmin_shutdown($spec, 70);
# ----------------------------------------------------------------------
# We loop with waitpid() nonblocking to see how many of the ones we
# are to kill, actually got killed by mtr_mysqladmin_shutdown().
# Note that we don't rely on this, the mysqld server might have stop
# listening to the port, but still be alive. But it is a start.
# ----------------------------------------------------------------------
foreach my $srv ( @$spec )
{
if ( $srv->{'pid'} and (waitpid($srv->{'pid'},&WNOHANG) == $srv->{'pid'}) )
{
$srv->{'pid'}= 0;
}
}
# ----------------------------------------------------------------------
# We know the process was started from this file, so there is a PID
# saved, or else we have nothing to do.
# Might be that is is recorded to be missing, but we failed to
# take away the PID file earlier, then we do it now.
# ----------------------------------------------------------------------
my %mysqld_pids;
foreach my $srv ( @$spec )
{
if ( $srv->{'pid'} )
{
$mysqld_pids{$srv->{'pid'}}= 1;
}
else
{
# Server is dead, we remove the pidfile if any
# Race, could have been removed between I tested with -f
# and the unlink() below, so I better check again with -f
if ( -f $srv->{'pidfile'} and ! unlink($srv->{'pidfile'}) and
-f $srv->{'pidfile'} )
{
mtr_error("can't remove $srv->{'pidfile'}");
}
}
}
# ----------------------------------------------------------------------
# If the processes where started from this script, and we had no PIDS
# then we don't have to do anything.
# ----------------------------------------------------------------------
if ( ! keys %mysqld_pids )
{
# cluck "This is how we got here!";
return;
}
# ----------------------------------------------------------------------
# In mtr_mysqladmin_shutdown() we only waited for the mysqld servers
# not to listen to the port. But we are not sure we got them all
# killed. If we suspect it lives, try nice kill with SIG_TERM. Note
# that for true Win32 processes, kill(0,$pid) will not return 1.
# ----------------------------------------------------------------------
start_reap_all(); # Avoid zombies
my @mysqld_pids= keys %mysqld_pids;
mtr_kill_processes(\@mysqld_pids);
stop_reap_all(); # Get into control again
# ----------------------------------------------------------------------
# Now, we check if all we can find using kill(0,$pid) are dead,
# and just assume the rest are. We cleanup socket and PID files.
# ----------------------------------------------------------------------
{
my $errors= 0;
foreach my $srv ( @$spec )
{
if ( $srv->{'pid'} )
{
if ( kill(0,$srv->{'pid'}) )
{
# FIXME In Cygwin there seem to be some fast reuse
# of PIDs, so dying may not be the right thing to do.
$errors++;
mtr_warning("can't kill process $srv->{'pid'}");
}
else
{
# We managed to kill it at last
# FIXME In Cygwin, we will get here even if the process lives.
# Not needed as we know the process is dead, but to be safe
# we unlink and check success in two steps. We first unlink
# without checking the error code, and then check if the
# file still exists.
foreach my $file ($srv->{'pidfile'}, $srv->{'sockfile'})
{
# Know it is dead so should be no race, careful anyway
if ( -f $file and ! unlink($file) and -f $file )
{
$errors++;
mtr_warning("couldn't delete $file");
}
}
}
}
}
if ( $errors )
{
# We are in trouble, just die....
mtr_error("we could not kill or clean up all processes");
}
}
# FIXME We just assume they are all dead, for Cygwin we are not
# really sure
}
##############################################################################
#
# Shut down mysqld servers using "mysqladmin ... shutdown".
# To speed this up, we start them in parallel and use waitpid() to
# catch their termination. Note that this doesn't say the servers
# are terminated, just that 'mysqladmin' is terminated.
#
# Note that mysqladmin will ask the server about what PID file it uses,
# and mysqladmin will wait for it to be removed before it terminates
# (unless passes timeout).
#
# This function will take at most about 20 seconds, and we still are not
# sure we killed them all. If none is responding to ping, we return 1,
# else we return 0.
#
##############################################################################
sub mtr_mysqladmin_shutdown {
my $spec= shift;
my $adm_shutdown_tmo= shift;
my %mysql_admin_pids;
my @to_kill_specs;
foreach my $srv ( @$spec )
{
if ( mtr_ping_mysqld_server($srv->{'port'}, $srv->{'sockfile'}) )
{
push(@to_kill_specs, $srv);
}
}
foreach my $srv ( @to_kill_specs )
{
# Shutdown time must be high as slave may be in reconnect
my $args;
mtr_init_args(\$args);
mtr_add_arg($args, "--no-defaults");
mtr_add_arg($args, "--user=%s", $::opt_user);
mtr_add_arg($args, "--password=");
if ( -e $srv->{'sockfile'} )
{
mtr_add_arg($args, "--socket=%s", $srv->{'sockfile'});
}
if ( $srv->{'port'} )
{
mtr_add_arg($args, "--port=%s", $srv->{'port'});
}
if ( $srv->{'port'} and ! -e $srv->{'sockfile'} )
{
mtr_add_arg($args, "--protocol=tcp"); # Needed if no --socket
}
mtr_add_arg($args, "--connect_timeout=5");
mtr_add_arg($args, "--shutdown_timeout=$adm_shutdown_tmo");
mtr_add_arg($args, "shutdown");
my $path_mysqladmin_log= "$::opt_vardir/log/mysqladmin.log";
my $pid= mtr_spawn($::exe_mysqladmin, $args,
"", $path_mysqladmin_log, $path_mysqladmin_log, "",
{ append_log_file => 1 });
$mysql_admin_pids{$pid}= 1;
# We don't wait for termination of mysqladmin
}
# As mysqladmin is such a simple program, we trust it to terminate.
# I.e. we wait blocking, and wait wait for them all before we go on.
while (keys %mysql_admin_pids)
{
foreach my $pid (keys %mysql_admin_pids)
{
if ( waitpid($pid,0) > 0 )
{
delete $mysql_admin_pids{$pid};
}
}
}
# If we trusted "mysqladmin --shutdown_timeout= ..." we could just
# terminate now, but we don't (FIXME should be debugged).
# So we try again to ping and at least wait the same amount of time
# mysqladmin would for all to die.
my $timeout= 20; # 20 seconds max
my $res= 1; # If we just fall through, we are done
# in the sense that the servers don't
# listen to their ports any longer
TIME:
while ( $timeout-- )
{
foreach my $srv ( @to_kill_specs )
{
$res= 1; # We are optimistic
if ( mtr_ping_mysqld_server($srv->{'port'}, $srv->{'sockfile'}) )
{
mtr_debug("Sleep 1 second waiting for processes to stop using port");
sleep(1); # One second
$res= 0;
next TIME;
}
}
last; # If we got here, we are done
}
$timeout or mtr_debug("At least one server is still listening to its port");
return $res;
}
##############################################################################
#
# The operating system will keep information about dead children,
# we read this information here, and if we have records the process
# is alive, we mark it as dead.
#
##############################################################################
sub mtr_record_dead_children () {
my $ret_pid;
# FIXME the man page says to wait for -1 to terminate,
# but on OS X we get '0' all the time...
while ( ($ret_pid= waitpid(-1,&WNOHANG)) > 0 )
{
mtr_debug("waitpid() catched exit of child $ret_pid");
foreach my $idx (0..1)
{
if ( $::master->[$idx]->{'pid'} eq $ret_pid )
{
mtr_debug("child $ret_pid was master[$idx]");
$::master->[$idx]->{'pid'}= 0;
}
}
foreach my $idx (0..2)
{
if ( $::slave->[$idx]->{'pid'} eq $ret_pid )
{
mtr_debug("child $ret_pid was slave[$idx]");
$::slave->[$idx]->{'pid'}= 0;
last;
}
}
}
}
sub start_reap_all {
# This causes terminating processes to not become zombies, avoiding
# the need for (or possibility of) explicit waitpid().
$SIG{CHLD}= 'IGNORE';
# On some platforms (Linux, QNX, OSX, ...) there is potential race
# here. If a process terminated before setting $SIG{CHLD} (but after
# any attempt to waitpid() it), it will still be a zombie. So we
# have to handle any such process here.
while(waitpid(-1, &WNOHANG) > 0) { };
}
sub stop_reap_all {
$SIG{CHLD}= 'DEFAULT';
}
sub mtr_ping_mysqld_server () {
my $port= shift;
my $remote= "localhost";
my $iaddr= inet_aton($remote);
if ( ! $iaddr )
{
mtr_error("can't find IP number for $remote");
}
my $paddr= sockaddr_in($port, $iaddr);
my $proto= getprotobyname('tcp');
if ( ! socket(SOCK, PF_INET, SOCK_STREAM, $proto) )
{
mtr_error("can't create socket: $!");
}
if ( connect(SOCK, $paddr) )
{
close(SOCK); # FIXME check error?
return 1;
}
else
{
return 0;
}
}
##############################################################################
#
# Wait for a file to be created
#
##############################################################################
# FIXME check that the pidfile contains the expected pid!
sub sleep_until_file_created ($$$) {
my $pidfile= shift;
my $timeout= shift;
my $pid= shift;
my $sleeptime= 100; # Milliseconds
my $loops= ($timeout * 1000) / $sleeptime;
for ( my $loop= 1; $loop <= $loops; $loop++ )
{
if ( -r $pidfile )
{
return $pid;
}
# Check if it died after the fork() was successful
if ( $pid != 0 && waitpid($pid,&WNOHANG) == $pid )
{
return 0;
}
mtr_debug("Sleep $sleeptime milliseconds waiting for ".
"creation of $pidfile");
# Print extra message every 60 seconds
my $seconds= ($loop * $sleeptime) / 1000;
if ( $seconds > 1 and $seconds % 60 == 0 )
{
my $left= $timeout - $seconds;
mtr_warning("Waited $seconds seconds for $pidfile to be created, " .
"still waiting for $left seconds...");
}
# Millisceond sleep emulated with select
select(undef, undef, undef, ($sleeptime/1000));
}
return 0;
}
sub mtr_kill_processes ($) {
my $pids = shift;
foreach my $sig (15, 9)
{
my $retries= 10;
while (1)
{
kill($sig, @{$pids});
last unless kill (0, @{$pids}) and $retries--;
mtr_debug("Sleep 2 second waiting for processes to die");
sleep(2);
}
}
}
sub mtr_kill_process ($$$$) {
my $pid= shift;
my $signal= shift;
my $retries= shift;
my $timeout= shift;
while (1)
{
kill($signal, $pid);
last unless kill (0, $pid) and $retries--;
mtr_debug("Sleep $timeout second waiting for processes to die");
sleep($timeout);
}
}
##############################################################################
#
# When we exit, we kill off all children
#
##############################################################################
# FIXME something is wrong, we sometimes terminate with "Hangup" written
# to tty, and no STDERR output telling us why.
# FIXME for some readon, setting HUP to 'IGNORE' will cause exit() to
# write out "Hangup", and maybe loose some output. We insert a sleep...
sub mtr_exit ($) {
my $code= shift;
# cluck("Called mtr_exit()");
mtr_timer_stop_all($::glob_timers);
local $SIG{HUP} = 'IGNORE';
# ToDo: Signalling -$$ will only work if we are the process group
# leader (in fact on QNX it will signal our session group leader,
# which might be Do-compile or Pushbuild, causing tests to be
# aborted). So we only do it if we are the group leader. We might
# set ourselves as the group leader at startup (with
# POSIX::setpgrp(0,0)), but then care must be needed to always do
# proper child process cleanup.
kill('HUP', -$$) if $$ == getpgrp();
sleep 2;
exit($code);
}
1;
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