Diff for /loncom/lond between versions 1.142 and 1.143

version 1.142, 2003/09/09 20:47:46 version 1.143, 2003/09/15 10:03:52
Line 60 Line 60
 # 09/08/2003 Ron Fox:  Told lond to take care of change logging so we  # 09/08/2003 Ron Fox:  Told lond to take care of change logging so we
 #      don't have to remember it:  #      don't have to remember it:
 # $Log$  # $Log$
   # Revision 1.143  2003/09/15 10:03:52  foxr
   # Completed and tested code for pushfile.
   #
 # Revision 1.142  2003/09/09 20:47:46  www  # Revision 1.142  2003/09/09 20:47:46  www
 # Permanently store chatroom entries in chatroom.log  # Permanently store chatroom entries in chatroom.log
 #  #
Line 87  use Authen::Krb4; Line 90  use Authen::Krb4;
 use Authen::Krb5;  use Authen::Krb5;
 use lib '/home/httpd/lib/perl/';  use lib '/home/httpd/lib/perl/';
 use localauth;  use localauth;
   use File::Copy;
   
 my $DEBUG = 0;       # Non zero to enable debug log entries.  my $DEBUG = 0;       # Non zero to enable debug log entries.
   
Line 186  sub ValidManager { Line 190  sub ValidManager {
     }      }
 }  }
 #  #
   #  CopyFile:  Called as part of the process of installing a 
   #             new configuration file.  This function copies an existing
   #             file to a backup file.
   # Parameters:
   #     oldfile  - Name of the file to backup.
   #     newfile  - Name of the backup file.
   # Return:
   #     0   - Failure (errno has failure reason).
   #     1   - Success.
   #
   sub CopyFile {
       my $oldfile = shift;
       my $newfile = shift;
   
       #  The file must exist:
   
       if(-e $oldfile) {
   
    # Read the old file.
   
    my $oldfh = IO::File->new("< $oldfile");
    if(!$oldfh) {
       return 0;
    }
    my @contents = <$oldfh>;  # Suck in the entire file.
   
    # write the backup file:
   
    my $newfh = IO::File->new("> $newfile");
    if(!(defined $newfh)){
       return 0;
    }
    my $lines = scalar @contents;
    for (my $i =0; $i < $lines; $i++) {
       print $newfh ($contents[$i]);
    }
   
    $oldfh->close;
    $newfh->close;
   
    chmod(0660, $newfile);
   
    return 1;
       
       } else {
    return 0;
       }
   }
   
   #
   #   InstallFile: Called to install an administrative file:
   #       - The file is created with <name>.tmp
   #       - The <name>.tmp file is then mv'd to <name>
   #   This lugubrious procedure is done to ensure that we are never without
   #   a valid, even if dated, version of the file regardless of who crashes
   #   and when the crash occurs.
   #
   #  Parameters:
   #       Name of the file
   #       File Contents.
   #  Return:
   #      nonzero - success.
   #      0       - failure and $! has an errno.
   #
   sub InstallFile {
       my $Filename = shift;
       my $Contents = shift;
       my $TempFile = $Filename.".tmp";
   
       #  Open the file for write:
   
       my $fh = IO::File->new("> $TempFile"); # Write to temp.
       if(!(defined $fh)) {
    &logthis('<font color="red"> Unable to create '.$TempFile."</font>");
    return 0;
       }
       #  write the contents of the file:
   
       print $fh ($Contents); 
       $fh->close; # In case we ever have a filesystem w. locking
   
       chmod(0660, $TempFile);
   
       # Now we can move install the file in position.
       
       move($TempFile, $Filename);
   
       return 1;
   }
   
   #
 #   PushFile:  Called to do an administrative push of a file.  #   PushFile:  Called to do an administrative push of a file.
 #              - Ensure the file being pushed is one we support.  #              - Ensure the file being pushed is one we support.
 #              - Backup the old file to <filename.saved>  #              - Backup the old file to <filename.saved>
Line 229  sub PushFile { Line 324  sub PushFile {
     #      #
     my $backupfile = $tablefile;      my $backupfile = $tablefile;
     $backupfile    =~ s/\.tab$/.old/;      $backupfile    =~ s/\.tab$/.old/;
     # CopyFile($tablefile, $backupfile);      if(!CopyFile($tablefile, $backupfile)) {
    &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
    return "error:$!";
       }
     &logthis('<font color="green"> Pushfile: backed up '      &logthis('<font color="green"> Pushfile: backed up '
     .$tablefile." to $backupfile</font>");      .$tablefile." to $backupfile</font>");
           
     #  Install the new file:      #  Install the new file:
   
     # InstallFile($tablefile, $contents);      if(!InstallFile($tablefile, $contents)) {
    &logthis('<font color="red"> Pushfile: unable to install '
    .$tablefile." $! </font>");
    return "error:$!";
       }
       else {
    &logthis('<font color="green"> Installed new '.$tablefile
    ."</font>");
   
       }
   
   
     #  Indicate success:      #  Indicate success:
     

Removed from v.1.142  
changed lines
  Added in v.1.143


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