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Diff for /loncom/apachereload between versions 1.1 and 1.7

version 1.1, 2003/09/30 10:06:48 version 1.7, 2011/05/14 16:12:53
Line 3 Line 3
 #  #
 # apachereload - setuid script that reloads the apache daemon.  # apachereload - setuid script that reloads the apache daemon.
 #  #
   # $Id$
 #  #
 # $Id  # Copyright Michigan State University Board of Trustees
 #  #
 #  Change log:  # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
 #   $Log$  
 #   Revision 1.1  2003/09/30 10:06:48  foxr  
 #   This is a setuid script that allows the www user to issue  
 #   /etc/init.d/httpd reload  
 #  #
 #   This functionality is required by lond and lonc when they have been asked to  # LON-CAPA is free software; you can redistribute it and/or modify
 #   reinitialize themselves.  # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or 
   # (at your option) any later version.
 #  #
 #   Initial undebugged version.  # LON-CAPA 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 LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
 #  #
 ###  
   
   
 use strict;  use strict;
Line 33  delete @ENV{qw(IFS CDPATH ENV BASH_ENV)} Line 42  delete @ENV{qw(IFS CDPATH ENV BASH_ENV)}
   
 my $command = "/etc/init.d/httpd reload";  my $command = "/etc/init.d/httpd reload";
   
   use lib '/home/httpd/lib/perl/';
   use LONCAPA::Configuration;
   my %perlvar= %{&LONCAPA::Configuration::read_conf('loncapa.conf')};
   
   my ($execdir) = ($perlvar{'lonDaemons'} =~/(.*)/);
   my $dist=`$execdir/distprobe`;
   if ($dist =~ /^(suse|sles)/) {
       $command = "/etc/init.d/apache reload";
   }
 # Do not print error messages  # Do not print error messages
 my $noprint=1;  my $noprint=1;
   
Line 50  if ($wwwid!=$>) { Line 68  if ($wwwid!=$>) {
 # ----------------------------------- Start running script with www permissions  # ----------------------------------- Start running script with www permissions
 &disable_root_capability;  &disable_root_capability;
   
 # --------------------------- Handle case of another apachereload process (locking)  
 unless (&try_to_lock('/tmp/lock_apachereload')) {  
     print "Error. Too many other simultaneous password change requests being ".  
  "made.\n" unless $noprint;  
     exit 4;  
 }  
   
   
 &enable_root_capability;  &enable_root_capability;
 ($>,$<)=(0,0);  ($>,$<)=(0,0);
   
Line 67  unless (&try_to_lock('/tmp/lock_apachere Line 77  unless (&try_to_lock('/tmp/lock_apachere
   
 system($command);  system($command);
   
 #  Remove the lock file.  
   
   
   
 &disable_root_capability;  &disable_root_capability;
 unlink('/tmp/lock_apachereload');  
 exit 0;  exit 0;
   
 # ---------------------------------------------- have setuid script run as root  # ---------------------------------------------- have setuid script run as root
Line 98  sub disable_root_capability { Line 103  sub disable_root_capability {
     }      }
 }  }
   
 # ----------------------- make sure that another apachereload process isn't running  
 sub try_to_lock {  
     my ($lockfile)=@_;  
     my $currentpid;  
     my $lastpid;  
     # Do not manipulate lock file as root  
     if ($>==0) {  
  return 0;  
     }  
     # Try to generate lock file.  
     # Wait 3 seconds.  If same process id is in  
     # lock file, then assume lock file is stale, and  
     # go ahead.  If process id's fluctuate, try  
     # for a maximum of 10 times.  
     for (0..10) {  
  if (-e $lockfile) {  
     open(LOCK,"<$lockfile");  
     $currentpid=<LOCK>;  
     close LOCK;  
     if ($currentpid==$lastpid) {  
  last;  
     }  
     sleep 3;  
     $lastpid=$currentpid;  
  }  
  else {  
     last;  
  }  
  if ($_==10) {  
     return 0;  
  }  
     }  
     open(LOCK,">$lockfile");  
     print LOCK $$;  
     close LOCK;  
     return 1;  
 }  
   
 =head1 NAME  =head1 NAME
   
 apachereload -setuid script to reload the apache web server.  apachereload -setuid script to reload the apache web server.
Removed from v.1.1  
changed lines
  Added in v.1.7

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