mirror of
https://github.com/moparisthebest/curl
synced 2024-12-24 17:18:48 -05:00
2a93021750
Related to #5188
399 lines
12 KiB
Perl
399 lines
12 KiB
Perl
#***************************************************************************
|
|
# _ _ ____ _
|
|
# Project ___| | | | _ \| |
|
|
# / __| | | | |_) | |
|
|
# | (__| |_| | _ <| |___
|
|
# \___|\___/|_| \_\_____|
|
|
#
|
|
# Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
#
|
|
# This software is licensed as described in the file COPYING, which
|
|
# you should have received as part of this distribution. The terms
|
|
# are also available at https://curl.haxx.se/docs/copyright.html.
|
|
#
|
|
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
# copies of the Software, and permit persons to whom the Software is
|
|
# furnished to do so, under the terms of the COPYING file.
|
|
#
|
|
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
# KIND, either express or implied.
|
|
#
|
|
###########################################################################
|
|
|
|
BEGIN {
|
|
# portable sleeping needs Time::HiRes
|
|
eval {
|
|
no warnings "all";
|
|
require Time::HiRes;
|
|
};
|
|
# portable sleeping falls back to native Sleep on Win32
|
|
eval {
|
|
no warnings "all";
|
|
require Win32;
|
|
}
|
|
}
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
use serverhelp qw(
|
|
servername_id
|
|
mainsockf_pidfilename
|
|
datasockf_pidfilename
|
|
);
|
|
|
|
use pathhelp qw(
|
|
os_is_win
|
|
);
|
|
|
|
#######################################################################
|
|
# portable_sleep uses Time::HiRes::sleep if available and falls back
|
|
# to the classic approach of using select(undef, undef, undef, ...).
|
|
# even though that one is not portable due to being implemented using
|
|
# select on Windows: https://perldoc.perl.org/perlport.html#select
|
|
# Therefore it uses Win32::Sleep on Windows systems instead.
|
|
#
|
|
sub portable_sleep {
|
|
my ($seconds) = @_;
|
|
|
|
if($Time::HiRes::VERSION) {
|
|
Time::HiRes::sleep($seconds);
|
|
}
|
|
elsif (os_is_win()) {
|
|
Win32::Sleep($seconds*1000);
|
|
}
|
|
else {
|
|
select(undef, undef, undef, $seconds);
|
|
}
|
|
}
|
|
|
|
#######################################################################
|
|
# pidfromfile returns the pid stored in the given pidfile. The value
|
|
# of the returned pid will never be a negative value. It will be zero
|
|
# on any file related error or if a pid can not be extracted from the
|
|
# given file.
|
|
#
|
|
sub pidfromfile {
|
|
my $pidfile = $_[0];
|
|
my $pid = 0;
|
|
|
|
if(-f $pidfile && -s $pidfile && open(PIDFH, "<$pidfile")) {
|
|
$pid = 0 + <PIDFH>;
|
|
close(PIDFH);
|
|
$pid = 0 unless($pid > 0);
|
|
}
|
|
return $pid;
|
|
}
|
|
|
|
#######################################################################
|
|
# pidexists checks if a process with a given pid exists and is alive.
|
|
# This will return the positive pid if the process exists and is alive.
|
|
# This will return the negative pid if the process exists differently.
|
|
# This will return 0 if the process could not be found.
|
|
#
|
|
sub pidexists {
|
|
my $pid = $_[0];
|
|
|
|
if($pid > 0) {
|
|
# verify if currently existing Windows process
|
|
if ($pid > 65536 && os_is_win()) {
|
|
$pid -= 65536;
|
|
if($^O ne 'MSWin32') {
|
|
my $filter = "PID eq $pid";
|
|
my $result = `tasklist -fi \"$filter\" 2>nul`;
|
|
if(index($result, "$pid") != -1) {
|
|
return -$pid;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
# verify if currently existing and alive
|
|
if(kill(0, $pid)) {
|
|
return $pid;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#######################################################################
|
|
# pidterm asks the process with a given pid to terminate gracefully.
|
|
#
|
|
sub pidterm {
|
|
my $pid = $_[0];
|
|
|
|
if($pid > 0) {
|
|
# request the process to quit
|
|
if ($pid > 65536 && os_is_win()) {
|
|
$pid -= 65536;
|
|
if($^O ne 'MSWin32') {
|
|
my $filter = "PID eq $pid";
|
|
my $result = `tasklist -fi \"$filter\" 2>nul`;
|
|
if(index($result, "$pid") != -1) {
|
|
system("taskkill -fi \"$filter\" >nul 2>&1");
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
# signal the process to terminate
|
|
kill("TERM", $pid);
|
|
}
|
|
}
|
|
|
|
#######################################################################
|
|
# pidkill kills the process with a given pid mercilessly and forcefully.
|
|
#
|
|
sub pidkill {
|
|
my $pid = $_[0];
|
|
|
|
if($pid > 0) {
|
|
# request the process to quit
|
|
if ($pid > 65536 && os_is_win()) {
|
|
$pid -= 65536;
|
|
if($^O ne 'MSWin32') {
|
|
my $filter = "PID eq $pid";
|
|
my $result = `tasklist -fi \"$filter\" 2>nul`;
|
|
if(index($result, "$pid") != -1) {
|
|
system("taskkill -f -fi \"$filter\" >nul 2>&1");
|
|
# Windows XP Home compatibility
|
|
system("tskill $pid >nul 2>&1");
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
# signal the process to terminate
|
|
kill("KILL", $pid);
|
|
}
|
|
}
|
|
|
|
#######################################################################
|
|
# pidwait waits for the process with a given pid to be terminated.
|
|
#
|
|
sub pidwait {
|
|
my $pid = $_[0];
|
|
my $flags = $_[1];
|
|
|
|
# check if the process exists
|
|
if ($pid > 65536 && os_is_win()) {
|
|
if($flags == &WNOHANG) {
|
|
return pidexists($pid)?0:$pid;
|
|
}
|
|
while(pidexists($pid)) {
|
|
portable_sleep(0.01);
|
|
}
|
|
return $pid;
|
|
}
|
|
|
|
# wait on the process to terminate
|
|
return waitpid($pid, $flags);
|
|
}
|
|
|
|
#######################################################################
|
|
# processexists checks if a process with the pid stored in the given
|
|
# pidfile exists and is alive. This will return 0 on any file related
|
|
# error or if a pid can not be extracted from the given file. When a
|
|
# process with the same pid as the one extracted from the given file
|
|
# is currently alive this returns that positive pid. Otherwise, when
|
|
# the process is not alive, will return the negative value of the pid.
|
|
#
|
|
sub processexists {
|
|
use POSIX ":sys_wait_h";
|
|
my $pidfile = $_[0];
|
|
|
|
# fetch pid from pidfile
|
|
my $pid = pidfromfile($pidfile);
|
|
|
|
if($pid > 0) {
|
|
# verify if currently alive
|
|
if(pidexists($pid)) {
|
|
return $pid;
|
|
}
|
|
else {
|
|
# get rid of the certainly invalid pidfile
|
|
unlink($pidfile) if($pid == pidfromfile($pidfile));
|
|
# reap its dead children, if not done yet
|
|
pidwait($pid, &WNOHANG);
|
|
# negative return value means dead process
|
|
return -$pid;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#######################################################################
|
|
# killpid attempts to gracefully stop processes in the given pid list
|
|
# with a SIGTERM signal and SIGKILLs those which haven't died on time.
|
|
#
|
|
sub killpid {
|
|
use POSIX ":sys_wait_h";
|
|
my ($verbose, $pidlist) = @_;
|
|
my @requested;
|
|
my @signalled;
|
|
my @reapchild;
|
|
|
|
# The 'pidlist' argument is a string of whitespace separated pids.
|
|
return if(not defined($pidlist));
|
|
|
|
# Make 'requested' hold the non-duplicate pids from 'pidlist'.
|
|
@requested = split(' ', $pidlist);
|
|
return if(not @requested);
|
|
if(scalar(@requested) > 2) {
|
|
@requested = sort({$a <=> $b} @requested);
|
|
}
|
|
for(my $i = scalar(@requested) - 2; $i >= 0; $i--) {
|
|
if($requested[$i] == $requested[$i+1]) {
|
|
splice @requested, $i+1, 1;
|
|
}
|
|
}
|
|
|
|
# Send a SIGTERM to processes which are alive to gracefully stop them.
|
|
foreach my $tmp (@requested) {
|
|
chomp $tmp;
|
|
if($tmp =~ /^(\d+)$/) {
|
|
my $pid = $1;
|
|
if($pid > 0) {
|
|
if(pidexists($pid)) {
|
|
print("RUN: Process with pid $pid signalled to die\n")
|
|
if($verbose);
|
|
pidterm($pid);
|
|
push @signalled, $pid;
|
|
}
|
|
else {
|
|
print("RUN: Process with pid $pid already dead\n")
|
|
if($verbose);
|
|
# if possible reap its dead children
|
|
pidwait($pid, &WNOHANG);
|
|
push @reapchild, $pid;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
# Allow all signalled processes five seconds to gracefully die.
|
|
if(@signalled) {
|
|
my $twentieths = 5 * 20;
|
|
while($twentieths--) {
|
|
for(my $i = scalar(@signalled) - 1; $i >= 0; $i--) {
|
|
my $pid = $signalled[$i];
|
|
if(!pidexists($pid)) {
|
|
print("RUN: Process with pid $pid gracefully died\n")
|
|
if($verbose);
|
|
splice @signalled, $i, 1;
|
|
# if possible reap its dead children
|
|
pidwait($pid, &WNOHANG);
|
|
push @reapchild, $pid;
|
|
}
|
|
}
|
|
last if(not scalar(@signalled));
|
|
portable_sleep(0.05);
|
|
}
|
|
}
|
|
|
|
# Mercilessly SIGKILL processes still alive.
|
|
if(@signalled) {
|
|
foreach my $pid (@signalled) {
|
|
if($pid > 0) {
|
|
print("RUN: Process with pid $pid forced to die with SIGKILL\n")
|
|
if($verbose);
|
|
pidkill($pid);
|
|
# if possible reap its dead children
|
|
pidwait($pid, &WNOHANG);
|
|
push @reapchild, $pid;
|
|
}
|
|
}
|
|
}
|
|
|
|
# Reap processes dead children for sure.
|
|
if(@reapchild) {
|
|
foreach my $pid (@reapchild) {
|
|
if($pid > 0) {
|
|
pidwait($pid, 0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#######################################################################
|
|
# killsockfilters kills sockfilter processes for a given server.
|
|
#
|
|
sub killsockfilters {
|
|
my ($proto, $ipvnum, $idnum, $verbose, $which) = @_;
|
|
my $server;
|
|
my $pidfile;
|
|
my $pid;
|
|
|
|
return if($proto !~ /^(ftp|imap|pop3|smtp)$/);
|
|
|
|
die "unsupported sockfilter: $which"
|
|
if($which && ($which !~ /^(main|data)$/));
|
|
|
|
$server = servername_id($proto, $ipvnum, $idnum) if($verbose);
|
|
|
|
if(!$which || ($which eq 'main')) {
|
|
$pidfile = mainsockf_pidfilename($proto, $ipvnum, $idnum);
|
|
$pid = processexists($pidfile);
|
|
if($pid > 0) {
|
|
printf("* kill pid for %s-%s => %d\n", $server,
|
|
($proto eq 'ftp')?'ctrl':'filt', $pid) if($verbose);
|
|
pidkill($pid);
|
|
pidwait($pid, 0);
|
|
}
|
|
unlink($pidfile) if(-f $pidfile);
|
|
}
|
|
|
|
return if($proto ne 'ftp');
|
|
|
|
if(!$which || ($which eq 'data')) {
|
|
$pidfile = datasockf_pidfilename($proto, $ipvnum, $idnum);
|
|
$pid = processexists($pidfile);
|
|
if($pid > 0) {
|
|
printf("* kill pid for %s-data => %d\n", $server,
|
|
$pid) if($verbose);
|
|
pidkill($pid);
|
|
pidwait($pid, 0);
|
|
}
|
|
unlink($pidfile) if(-f $pidfile);
|
|
}
|
|
}
|
|
|
|
#######################################################################
|
|
# killallsockfilters kills sockfilter processes for all servers.
|
|
#
|
|
sub killallsockfilters {
|
|
my $verbose = $_[0];
|
|
|
|
for my $proto (('ftp', 'imap', 'pop3', 'smtp')) {
|
|
for my $ipvnum (('4', '6')) {
|
|
for my $idnum (('1', '2')) {
|
|
killsockfilters($proto, $ipvnum, $idnum, $verbose);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
sub set_advisor_read_lock {
|
|
my ($filename) = @_;
|
|
|
|
if(open(FILEH, ">$filename")) {
|
|
close(FILEH);
|
|
return;
|
|
}
|
|
printf "Error creating lock file $filename error: $!";
|
|
}
|
|
|
|
|
|
sub clear_advisor_read_lock {
|
|
my ($filename) = @_;
|
|
|
|
if(-f $filename) {
|
|
unlink($filename);
|
|
}
|
|
}
|
|
|
|
|
|
1;
|