# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
-# Copyright (C) 1998 - 2006, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2010, 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 http://curl.haxx.se/docs/copyright.html.
+# 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
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
-# $Id$
###########################################################################
+use strict;
+use warnings;
+
+use serverhelp qw(
+ servername_id
+ mainsockf_pidfilename
+ datasockf_pidfilename
+ );
+
+#######################################################################
+# 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 and alive
+ if(kill(0, $pid)) {
+ return $pid;
+ }
+
+ # verify if currently existing Windows process
+ if($^O eq "msys") {
+ my $filter = "PID eq $pid";
+ my $result = `tasklist -fi \"$filter\" 2>nul`;
+ if(index($result, "$pid") != -1) {
+ return -$pid;
+ }
+ }
+ }
+
+ return 0;
+}
+
#######################################################################
-# Return the pid of the server as found in the given pid file
+# pidterm asks the process with a given pid to terminate gracefully.
#
-sub serverpid {
- my $PIDFILE = $_[0];
- open(PFILE, "<$PIDFILE");
- my $PID=0+<PFILE>;
- close(PFILE);
- return $PID;
+sub pidterm {
+ my $pid = $_[0];
+
+ if($pid > 0) {
+ # signal the process to terminate
+ kill("TERM", $pid);
+
+ # request the process to quit
+ if($^O eq "msys") {
+ my $filter = "PID eq $pid";
+ my $result = `tasklist -fi \"$filter\" 2>nul`;
+ if(index($result, "$pid") != -1) {
+ system("taskkill -fi \"$filter\" >nul 2>&1");
+ }
+ }
+ }
+}
+
+#######################################################################
+# pidkill kills the process with a given pid mercilessly andforcefully.
+#
+sub pidkill {
+ my $pid = $_[0];
+
+ if($pid > 0) {
+ # signal the process to terminate
+ kill("KILL", $pid);
+
+ # request the process to quit
+ if($^O eq "msys") {
+ 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 $pid >nul 2>&1");
+ }
+ }
+ }
}
#######################################################################
-# Check the given test server if it is still alive.
+# processexists checks if a process with the pid stored in the given
+# pidfile exists and is alive. This will return 0 on any file related
+# error or if a pid can not be extracted from the given file. When a
+# process with the same pid as the one extracted from the given file
+# is currently alive this returns that positive pid. Otherwise, when
+# the process is not alive, will return the negative value of the pid.
#
-sub checkserver {
- my ($pidfile)=@_;
- my $pid=0;
-
- # check for pidfile
- if ( -f $pidfile ) {
- $pid=serverpid($pidfile);
- if ($pid ne "" && kill(0, $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 $pid;
}
else {
- return -$pid; # negative means dead process
+ # get rid of the certainly invalid pidfile
+ unlink($pidfile) if($pid == pidfromfile($pidfile));
+ # reap its dead children, if not done yet
+ waitpid($pid, &WNOHANG);
+ # negative return value means dead process
+ return -$pid;
}
}
return 0;
}
-#############################################################################
-# Kill a specific slave
+#######################################################################
+# killpid attempts to gracefully stop processes in the given pid list
+# with a SIGTERM signal and SIGKILLs those which haven't died on time.
+#
+sub killpid {
+ use POSIX ":sys_wait_h";
+ my ($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
+ waitpid($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, $i, 1;
+ # if possible reap its dead children
+ waitpid($pid, &WNOHANG);
+ push @reapchild, $pid;
+ }
+ }
+ last if(not scalar(@signalled));
+ select(undef, undef, undef, 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($pid);
+ # if possible reap its dead children
+ waitpid($pid, &WNOHANG);
+ push @reapchild, $pid;
+ }
+ }
+ }
+
+ # Reap processes dead children for sure.
+ if(@reapchild) {
+ foreach my $pid (@reapchild) {
+ if($pid > 0) {
+ waitpid($pid, 0);
+ }
+ }
+ }
+}
+
+#######################################################################
+# killsockfilters kills sockfilter processes for a given server.
#
-sub ftpkillslave {
- my ($id, $ext, $verbose)=@_;
- my $base;
- for $base (('filt', 'data')) {
- my $f = ".sock$base$id$ext.pid";
- my $pid = checkserver($f);
+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($pid > 0) {
- printf ("* kill pid for %s => %d\n", "ftp-$base$id$ext", $pid) if($verbose);
- kill (9, $pid); # die!
+ printf("* kill pid for %s-%s => %d\n", $server,
+ ($proto eq 'ftp')?'ctrl':'filt', $pid) if($verbose);
+ pidkill($pid);
waitpid($pid, 0);
}
- unlink($f);
+ unlink($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($pid);
+ waitpid($pid, 0);
+ }
+ unlink($pidfile) if(-f $pidfile);
+ }
+}
-#############################################################################
-# Make sure no FTP leftovers are still running. Kill all slave processes.
-# This uses pidfiles since it might be used by other processes.
+#######################################################################
+# killallsockfilters kills sockfilter processes for all servers.
#
-sub ftpkillslaves {
- my ($versbose) = @_;
- for $ext (("", "ipv6")) {
- for $id (("", "2")) {
- ftpkillslave ($id, $ext, $verbose);
+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;
projects / platform / upstream / curl.git / blobdiff