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diff --git a/mysql-test/lib/v1/mtr_process.pl b/mysql-test/lib/v1/mtr_process.pl
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+# -*- cperl -*-
+# Copyright (c) 2004-2006 MySQL AB, 2008 Sun Microsystems, Inc.
+# Use is subject to license terms.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA
+
+# 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 Socket;
+use Errno;
+use strict;
+
+use POSIX qw(WNOHANG SIGHUP);
+
+sub mtr_run ($$$$$$;$);
+sub mtr_spawn ($$$$$$;$);
+sub mtr_check_stop_servers ($);
+sub mtr_kill_leftovers ();
+sub mtr_wait_blocking ($);
+sub mtr_record_dead_children ();
+sub mtr_mysqladmin_start($$$);
+sub mtr_exit ($);
+sub sleep_until_file_created ($$$);
+sub mtr_kill_processes ($);
+sub mtr_ping_with_timeout($);
+sub mtr_ping_port ($);
+
+# Local function
+sub spawn_impl ($$$$$$$);
+
+##############################################################################
+#
+# Execute an external command
+#
+##############################################################################
+
+sub mtr_run ($$$$$$;$) {
+ my $path= shift;
+ my $arg_list_t= shift;
+ my $input= shift;
+ my $output= shift;
+ my $error= shift;
+ my $pid_file= shift; # Not used
+ my $spawn_opts= shift;
+
+ return spawn_impl($path,$arg_list_t,'run',$input,$output,$error,
+ $spawn_opts);
+}
+
+sub mtr_run_test ($$$$$$;$) {
+ my $path= shift;
+ my $arg_list_t= shift;
+ my $input= shift;
+ my $output= shift;
+ my $error= shift;
+ my $pid_file= shift; # Not used
+ my $spawn_opts= shift;
+
+ return spawn_impl($path,$arg_list_t,'test',$input,$output,$error,
+ $spawn_opts);
+}
+
+sub mtr_spawn ($$$$$$;$) {
+ my $path= shift;
+ my $arg_list_t= shift;
+ my $input= shift;
+ my $output= shift;
+ my $error= shift;
+ my $pid_file= shift; # Not used
+ my $spawn_opts= shift;
+
+ return spawn_impl($path,$arg_list_t,'spawn',$input,$output,$error,
+ $spawn_opts);
+}
+
+
+
+sub spawn_impl ($$$$$$$) {
+ my $path= shift;
+ my $arg_list_t= shift;
+ my $mode= shift;
+ my $input= shift;
+ my $output= shift;
+ my $error= shift;
+ my $spawn_opts= shift;
+
+ if ( $::opt_script_debug )
+ {
+ mtr_report("");
+ mtr_debug("-" x 73);
+ mtr_debug("STDIN $input") if $input;
+ mtr_debug("STDOUT $output") if $output;
+ mtr_debug("STDERR $error") if $error;
+ mtr_debug("$mode: $path ", join(" ",@$arg_list_t));
+ mtr_debug("spawn options:");
+ if ($spawn_opts)
+ {
+ foreach my $key (sort keys %{$spawn_opts})
+ {
+ mtr_debug(" - $key: $spawn_opts->{$key}");
+ }
+ }
+ else
+ {
+ mtr_debug(" none");
+ }
+ mtr_debug("-" x 73);
+ mtr_report("");
+ }
+
+ mtr_error("Can't spawn with empty \"path\"") unless defined $path;
+
+
+ FORK:
+ {
+ my $pid= fork();
+
+ if ( ! defined $pid )
+ {
+ if ( $! == $!{EAGAIN} ) # See "perldoc Errno"
+ {
+ mtr_warning("Got EAGAIN from fork(), sleep 1 second and redo");
+ sleep(1);
+ redo FORK;
+ }
+
+ mtr_error("$path ($pid) can't be forked, error: $!");
+
+ }
+
+ if ( $pid )
+ {
+ select(STDOUT) if $::glob_win32_perl;
+ return spawn_parent_impl($pid,$mode,$path);
+ }
+ else
+ {
+ # Child, redirect output and exec
+
+ $SIG{INT}= 'DEFAULT'; # Parent do some stuff, we don't
+
+ my $log_file_open_mode = '>';
+
+ if ($spawn_opts and $spawn_opts->{'append_log_file'})
+ {
+ $log_file_open_mode = '>>';
+ }
+
+ if ( $output )
+ {
+ if ( $::glob_win32_perl )
+ {
+ # Don't redirect stdout on ActiveState perl since this is
+ # just another thread in the same process.
+ }
+ elsif ( ! open(STDOUT,$log_file_open_mode,$output) )
+ {
+ mtr_child_error("can't redirect STDOUT to \"$output\": $!");
+ }
+ }
+
+ if ( $error )
+ {
+ if ( !$::glob_win32_perl and $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\": $!");
+ }
+ mtr_error("Should never come here 1!");
+ }
+ mtr_error("Should never come here 2!");
+ }
+ mtr_error("Should never come here 3!");
+}
+
+
+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, wait blocking for it to return
+ my $ret_pid= waitpid($pid,0);
+ if ( $ret_pid != $pid )
+ {
+ # The "simple" waitpid has failed, print debug info
+ # and try to handle the error
+ mtr_warning("waitpid($pid, 0) returned $ret_pid " .
+ "when waiting for '$path', error: '$!'");
+ if ( $ret_pid == -1 )
+ {
+ # waitpid returned -1, that would indicate the process
+ # no longer exist and waitpid couldn't wait for it.
+ return 1;
+ }
+ mtr_error("Error handling failed");
+ }
+
+ 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.
+
+
+ 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
+ print STDERR "\n";
+ kill(9, $pid); # Kill mysqltest
+ mtr_kill_leftovers(); # Kill servers the hard way
+ 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;
+ }
+
+ # One of the child processes died, unless this was expected
+ # mysqltest should be killed and test aborted
+
+ check_expected_crash_and_restart($ret_pid);
+ }
+
+ if ( $ret_pid != $pid )
+ {
+ # We terminated the waiting because a "mysqld" process died.
+ # Kill the mysqltest process.
+ mtr_verbose("Kill mysqltest because another process died");
+ kill(9,$pid);
+
+ $ret_pid= waitpid($pid,0);
+
+ if ( $ret_pid != $pid )
+ {
+ 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
+#
+##############################################################################
+
+
+# Kill all processes that would conflict with this run
+# Make sure to remove the PID file, if any.
+sub mtr_kill_leftovers () {
+
+ mtr_report("Killing Possible Leftover Processes");
+ mtr_debug("mtr_kill_leftovers(): started.");
+
+ my @kill_pids;
+ my %admin_pids;
+
+ foreach my $srv (@{$::master}, @{$::slave})
+ {
+ mtr_debug(" - mysqld " .
+ "(pid: $srv->{pid}; " .
+ "pid file: '$srv->{path_pid}'; " .
+ "socket: '$srv->{path_sock}'; ".
+ "port: $srv->{port})");
+
+ my $pid= mtr_mysqladmin_start($srv, "shutdown", 20);
+
+ # Save the pid of the mysqladmin process
+ $admin_pids{$pid}= 1;
+
+ push(@kill_pids,{
+ pid => $srv->{'pid'},
+ pidfile => $srv->{'path_pid'},
+ sockfile => $srv->{'path_sock'},
+ port => $srv->{'port'},
+ });
+ $srv->{'pid'}= 0; # Assume we are done with it
+ }
+
+ # Wait for all the admin processes to complete
+ mtr_wait_blocking(\%admin_pids);
+
+ # 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.
+
+ mtr_ping_with_timeout(\@kill_pids);
+
+ # 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
+
+ my $rundir= "$::opt_vardir/run";
+
+ mtr_debug("Processing PID files in directory '$rundir'...");
+
+ if ( -d $rundir )
+ {
+ opendir(RUNDIR, $rundir)
+ or mtr_error("can't open directory \"$rundir\": $!");
+
+ my @pids;
+
+ while ( my $elem= readdir(RUNDIR) )
+ {
+ # Only read pid from files that end with .pid
+ if ( $elem =~ /.*[.]pid$/)
+ {
+ my $pidfile= "$rundir/$elem";
+
+ if ( -f $pidfile )
+ {
+ mtr_debug("Processing PID file: '$pidfile'...");
+
+ my $pid= mtr_get_pid_from_file($pidfile);
+
+ mtr_debug("Got pid: $pid from file '$pidfile'");
+
+ if ( $::glob_cygwin_perl or kill(0, $pid) )
+ {
+ mtr_debug("There is process with pid $pid -- scheduling for kill.");
+ push(@pids, $pid); # We know (cygwin guess) it exists
+ }
+ else
+ {
+ mtr_debug("There is no process with pid $pid -- skipping.");
+ }
+ }
+ }
+ }
+ closedir(RUNDIR);
+
+ if ( @pids )
+ {
+ mtr_debug("Killing the following processes with PID files: " .
+ join(' ', @pids) . "...");
+
+ start_reap_all();
+
+ 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
+ {
+ mtr_debug("Sending SIGKILL to pids: " . join(' ', @pids));
+ kill(9, @pids);
+ mtr_report("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));
+ }
+ }
+
+ stop_reap_all();
+ }
+ }
+ else
+ {
+ mtr_debug("Directory for PID files ($rundir) does not exist.");
+ }
+
+ # We may have failed everything, but we now check again if we have
+ # the listen ports free to use, and if they are free, just go for it.
+
+ mtr_debug("Checking known mysqld servers...");
+
+ foreach my $srv ( @kill_pids )
+ {
+ if ( defined $srv->{'port'} and mtr_ping_port($srv->{'port'}) )
+ {
+ mtr_warning("can't kill old process holding port $srv->{'port'}");
+ }
+ }
+
+ mtr_debug("mtr_kill_leftovers(): finished.");
+}
+
+
+#
+# Check that all processes in "spec" are shutdown gracefully
+# else kill them off hard
+#
+sub mtr_check_stop_servers ($) {
+ my $spec= shift;
+
+ # Return if no processes are defined
+ return if ! @$spec;
+
+ mtr_verbose("mtr_check_stop_servers");
+
+ # ----------------------------------------------------------------------
+ # Wait until servers in "spec" has stopped listening
+ # to their ports or timeout occurs
+ # ----------------------------------------------------------------------
+ mtr_ping_with_timeout(\@$spec);
+
+ # ----------------------------------------------------------------------
+ # Use waitpid() nonblocking for a little while, to see how
+ # many process's will exit sucessfully.
+ # This is the normal case.
+ # ----------------------------------------------------------------------
+ my $wait_counter= 50; # Max number of times to redo the loop
+ foreach my $srv ( @$spec )
+ {
+ my $pid= $srv->{'pid'};
+ my $ret_pid;
+ if ( $pid )
+ {
+ $ret_pid= waitpid($pid,&WNOHANG);
+ if ($ret_pid == $pid)
+ {
+ mtr_verbose("Caught exit of process $ret_pid");
+ $srv->{'pid'}= 0;
+ }
+ elsif ($ret_pid == 0)
+ {
+ mtr_verbose("Process $pid is still alive");
+ if ($wait_counter-- > 0)
+ {
+ # Give the processes more time to exit
+ select(undef, undef, undef, (0.1));
+ redo;
+ }
+ }
+ else
+ {
+ mtr_warning("caught exit of unknown child $ret_pid");
+ }
+ }
+ }
+
+ # ----------------------------------------------------------------------
+ # The processes that haven't yet exited need to
+ # be killed hard, put them in "kill_pids" hash
+ # ----------------------------------------------------------------------
+ my %kill_pids;
+ foreach my $srv ( @$spec )
+ {
+ my $pid= $srv->{'pid'};
+ if ( $pid )
+ {
+ # Server is still alive, put it in list to be hard killed
+ if ($::glob_win32_perl)
+ {
+ # Kill the real process if it's known
+ $pid= $srv->{'real_pid'} if ($srv->{'real_pid'});
+ }
+ $kill_pids{$pid}= 1;
+
+ # Write a message to the process's error log (if it has one)
+ # that it's being killed hard.
+ if ( defined $srv->{'errfile'} )
+ {
+ mtr_tofile($srv->{'errfile'}, "Note: Forcing kill of process $pid\n");
+ }
+ mtr_warning("Forcing kill of process $pid");
+
+ }
+ else
+ {
+ # Server is dead, remove the pidfile if it exists
+ #
+ # Race, could have been removed between test with -f
+ # and the unlink() below, so 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 ( ! keys %kill_pids )
+ {
+ # All processes has exited gracefully
+ return;
+ }
+
+ mtr_kill_processes(\%kill_pids);
+
+ # ----------------------------------------------------------------------
+ # All processes are killed, cleanup leftover files
+ # ----------------------------------------------------------------------
+ {
+ my $errors= 0;
+ foreach my $srv ( @$spec )
+ {
+ if ( $srv->{'pid'} )
+ {
+ # Server has been hard killed, clean it's resources
+ foreach my $file ($srv->{'pidfile'}, $srv->{'sockfile'})
+ {
+ # Know it is dead so should be no race, careful anyway
+ if ( defined $file and -f $file and ! unlink($file) and -f $file )
+ {
+ $errors++;
+ mtr_warning("couldn't delete $file");
+ }
+ }
+
+ if ($::glob_win32_perl and $srv->{'real_pid'})
+ {
+ # Wait for the pseudo pid - if the real_pid was known
+ # the pseudo pid has not been waited for yet, wai blocking
+ # since it's "such a simple program"
+ mtr_verbose("Wait for pseudo process $srv->{'pid'}");
+ my $ret_pid= waitpid($srv->{'pid'}, 0);
+ mtr_verbose("Pseudo process $ret_pid died");
+ }
+
+ $srv->{'pid'}= 0;
+ }
+ }
+ if ( $errors )
+ {
+ # There where errors killing processes
+ # do one last attempt to ping the servers
+ # and if they can't be pinged, assume they are dead
+ if ( ! mtr_ping_with_timeout( \@$spec ) )
+ {
+ mtr_error("we could not kill or clean up all processes");
+ }
+ else
+ {
+ mtr_verbose("All ports were free, continuing");
+ }
+ }
+ }
+}
+
+
+# Wait for all the process in the list to terminate
+sub mtr_wait_blocking($) {
+ my $admin_pids= shift;
+
+
+ # Return if no processes defined
+ return if ! %$admin_pids;
+
+ mtr_verbose("mtr_wait_blocking");
+
+ # Wait for all the started processes to exit
+ # As mysqladmin is such a simple program, we trust it to terminate itself.
+ # I.e. we wait blocking, and wait for them all before we go on.
+ foreach my $pid (keys %{$admin_pids})
+ {
+ my $ret_pid= waitpid($pid,0);
+
+ }
+}
+
+# Start "mysqladmin <command>" for a specific mysqld
+sub mtr_mysqladmin_start($$$) {
+ my $srv= shift;
+ my $command= shift;
+ my $adm_shutdown_tmo= shift;
+
+ 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=");
+ mtr_add_arg($args, "--silent");
+ if ( -e $srv->{'path_sock'} )
+ {
+ mtr_add_arg($args, "--socket=%s", $srv->{'path_sock'});
+ }
+ if ( $srv->{'port'} )
+ {
+ mtr_add_arg($args, "--port=%s", $srv->{'port'});
+ }
+ if ( $srv->{'port'} and ! -e $srv->{'path_sock'} )
+ {
+ mtr_add_arg($args, "--protocol=tcp"); # Needed if no --socket
+ }
+ mtr_add_arg($args, "--connect_timeout=5");
+
+ # Shutdown time must be high as slave may be in reconnect
+ mtr_add_arg($args, "--shutdown_timeout=$adm_shutdown_tmo");
+ mtr_add_arg($args, "$command");
+ my $pid= mtr_spawn($::exe_mysqladmin, $args,
+ "", "", "", "",
+ { append_log_file => 1 });
+ mtr_verbose("mtr_mysqladmin_start, pid: $pid");
+ return $pid;
+
+}
+
+# Ping all servers in list, exit when none of them answers
+# or when timeout has passed
+sub mtr_ping_with_timeout($) {
+ my $spec= shift;
+ my $timeout= 200; # 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
+
+ mtr_debug("Waiting for mysqld servers to stop...");
+
+ TIME:
+ while ( $timeout-- )
+ {
+ foreach my $srv ( @$spec )
+ {
+ $res= 1; # We are optimistic
+ if ( $srv->{'pid'} and defined $srv->{'port'} )
+ {
+ if ( mtr_ping_port($srv->{'port'}) )
+ {
+ mtr_verbose("waiting for process $srv->{'pid'} to stop ".
+ "using port $srv->{'port'}");
+
+ # Millisceond sleep emulated with select
+ select(undef, undef, undef, (0.1));
+ $res= 0;
+ next TIME;
+ }
+ else
+ {
+ # Process was not using port
+ }
+ }
+ }
+ last; # If we got here, we are done
+ }
+
+ if ($res)
+ {
+ mtr_debug("mtr_ping_with_timeout(): All mysqld instances are down.");
+ }
+ else
+ {
+ mtr_report("mtr_ping_with_timeout(): At least one server is alive.");
+ }
+
+ return $res;
+}
+
+
+#
+# Loop through our list of processes and look for and entry
+# with the provided pid
+# Set the pid of that process to 0 if found
+#
+sub mark_process_dead($)
+{
+ my $ret_pid= shift;
+
+ foreach my $mysqld (@{$::master}, @{$::slave})
+ {
+ if ( $mysqld->{'pid'} eq $ret_pid )
+ {
+ mtr_verbose("$mysqld->{'type'} $mysqld->{'idx'} exited, pid: $ret_pid");
+ $mysqld->{'pid'}= 0;
+ return;
+ }
+ }
+
+ mtr_warning("mark_process_dead couldn't find an entry for pid: $ret_pid");
+
+}
+
+#
+# Loop through our list of processes and look for and entry
+# with the provided pid, if found check for the file indicating
+# expected crash and restart it.
+#
+sub check_expected_crash_and_restart($)
+{
+ my $ret_pid= shift;
+
+ foreach my $mysqld (@{$::master}, @{$::slave})
+ {
+ if ( $mysqld->{'pid'} eq $ret_pid )
+ {
+ mtr_verbose("$mysqld->{'type'} $mysqld->{'idx'} exited, pid: $ret_pid");
+ $mysqld->{'pid'}= 0;
+
+ # Check if crash expected, and restart if it was
+ my $expect_file= "$::opt_vardir/tmp/" . "$mysqld->{'type'}" .
+ "$mysqld->{'idx'}" . ".expect";
+ while ( 1 )
+ {
+ if ( -f $expect_file )
+ {
+ mtr_verbose("Crash was expected, file $expect_file exists");
+ my $expect_file_handler;
+ open($expect_file_handler, "<$expect_file") or die;
+ my @expect_lines= <$expect_file_handler>;
+ close $expect_file_handler;
+ # look at most recent order by the test
+ my $expect_content= pop @expect_lines;
+ chomp $expect_content;
+ if ( $expect_content =~ /^wait/ )
+ {
+ mtr_verbose("Test asks that we wait before restart");
+ # Millisceond sleep emulated with select
+ select(undef, undef, undef, (0.1));
+ next;
+ }
+ unlink($expect_file);
+ mysqld_start($mysqld, $mysqld->{'start_opts'},
+ $mysqld->{'start_slave_master_info'});
+ }
+ last;
+ }
+
+ return;
+ }
+ }
+
+ mtr_warning("check_expected_crash_and_restart couldn't find an entry for pid: $ret_pid");
+
+}
+
+##############################################################################
+#
+# 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 $process_died= 0;
+ my $ret_pid;
+
+ # Wait without blockinng to see if any processes had died
+ # -1 or 0 means there are no more procesess to wait for
+ while ( ($ret_pid= waitpid(-1,&WNOHANG)) != 0 and $ret_pid != -1)
+ {
+ mtr_warning("mtr_record_dead_children: $ret_pid");
+ mark_process_dead($ret_pid);
+ $process_died= 1;
+ }
+ return $process_died;
+}
+
+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.
+ my $pid;
+ while(($pid= waitpid(-1, &WNOHANG)) != 0 and $pid != -1)
+ {
+ mtr_warning("start_reap_all pid: $pid");
+ mark_process_dead($pid);
+ };
+}
+
+sub stop_reap_all {
+ $SIG{CHLD}= 'DEFAULT';
+}
+
+
+sub mtr_ping_port ($) {
+ my $port= shift;
+
+ mtr_verbose("mtr_ping_port: $port");
+
+ 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: $!");
+ }
+
+ mtr_debug("Pinging server (port: $port)...");
+
+ if ( connect(SOCK, $paddr) )
+ {
+ close(SOCK); # FIXME check error?
+ mtr_verbose("USED");
+ return 1;
+ }
+ else
+ {
+ mtr_verbose("FREE");
+ return 0;
+ }
+}
+
+##############################################################################
+#
+# Wait for a file to be created
+#
+##############################################################################
+
+# FIXME check that the pidfile contains the expected pid!
+
+sub sleep_until_file_created ($$$) {
+ my $pidfile= shift;
+ my $timeout= shift;
+ my $pid= shift;
+ my $sleeptime= 100; # Milliseconds
+ my $loops= ($timeout * 1000) / $sleeptime;
+
+ for ( my $loop= 1; $loop <= $loops; $loop++ )
+ {
+ if ( -r $pidfile )
+ {
+ return 1;
+ }
+
+ # Check if it died after the fork() was successful
+ if ( $pid != 0 && waitpid($pid,&WNOHANG) == $pid )
+ {
+ mtr_warning("Process $pid died");
+ return 0;
+ }
+
+ mtr_debug("Sleep $sleeptime milliseconds waiting for $pidfile");
+
+ # Print extra message every 60 seconds
+ my $seconds= ($loop * $sleeptime) / 1000;
+ if ( $seconds > 1 and int($seconds * 10) % 600 == 0 )
+ {
+ my $left= $timeout - $seconds;
+ mtr_warning("Waited $seconds seconds for $pidfile to be created, " .
+ "still waiting for $left seconds...");
+ }
+
+ # Millisceond sleep emulated with select
+ select(undef, undef, undef, ($sleeptime/1000));
+ }
+
+ return 0;
+}
+
+
+sub mtr_kill_processes ($) {
+ my $pids = shift;
+
+ mtr_verbose("mtr_kill_processes (" . join(" ", keys %{$pids}) . ")");
+
+ foreach my $pid (keys %{$pids})
+ {
+
+ if ($pid <= 0)
+ {
+ mtr_warning("Trying to kill illegal pid: $pid");
+ next;
+ }
+
+ my $signaled_procs= kill(9, $pid);
+ if ($signaled_procs == 0)
+ {
+ # No such process existed, assume it's killed
+ mtr_verbose("killed $pid(no such process)");
+ }
+ else
+ {
+ my $ret_pid= waitpid($pid,0);
+ if ($ret_pid == $pid)
+ {
+ mtr_verbose("killed $pid(got the pid)");
+ }
+ elsif ($ret_pid == -1)
+ {
+ mtr_verbose("killed $pid(got -1)");
+ }
+ }
+ }
+ mtr_verbose("done killing processes");
+}
+
+
+##############################################################################
+#
+# When we exit, we kill off all children
+#
+##############################################################################
+
+sub mtr_exit ($) {
+ my $code= shift;
+ mtr_timer_stop_all($::glob_timers);
+ local $SIG{HUP} = 'IGNORE';
+ # ToDo: Signalling -$$ 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.
+ POSIX::kill(SIGHUP, -$$) if !$::glob_win32_perl and $$ == getpgrp();
+
+ exit($code);
+}
+
+###########################################################################
+
+1;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 05:45:08 +0000