usr/src/cmd/gss/gsscred_clean/gsscred_clean.ksh

   1 #!/bin/ksh
   2 #
   3 # CDDL HEADER START
   4 #
   5 # The contents of this file are subject to the terms of the
   6 # Common Development and Distribution License, Version 1.0 only
   7 # (the "License").  You may not use this file except in compliance
   8 # with the License.
   9 #
  10 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  11 # or http://www.opensolaris.org/os/licensing.
  12 # See the License for the specific language governing permissions
  13 # and limitations under the License.
  14 #
  15 # When distributing Covered Code, include this CDDL HEADER in each
  16 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  17 # If applicable, add the following below this CDDL HEADER, with the
  18 # fields enclosed by brackets "[]" replaced with your own identifying
  19 # information: Portions Copyright [yyyy] [name of copyright owner]
  20 #
  21 # CDDL HEADER END
  22 #
  23 #
  24 # Copyright (c) 1998 by Sun Microsystems, Inc.
  25 # All rights reserved.
  26 #
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28 #
  29 # gsscred_db clean up script
  30 #
  31 # This file is used to remove duplicate entries from
  32 # the gsscred_db file. It is activated as a root cron
  33 # job once a day. It only performs cleanup when
  34 # the gsscred_db file has changed since last operation.
  35
  36 FILE_TO_CLEAN=/etc/gss/gsscred_db
  37 CLEAN_TIME=/etc/gss/.gsscred_clean
  38 TMP_FILE=/etc/gss/gsscred_clean$$
  39
  40 trap "rm -f $TMP_FILE; exit" 0 1 2 3 13 15
  41
  42
  43 if [ -s $FILE_TO_CLEAN ] && [ $FILE_TO_CLEAN -nt $CLEAN_TIME ]
  44 then
  45
  46 #
  47 #       The file being sorted has the following format:
  48 #               name    uid     comment
  49 #
  50 #       We are trying to remove duplicate entries for the name
  51 #       which may have different uids. Entries lower in the file
  52 #       are newer since addition performs an append. We use cat -n
  53 #       in order to preserve the order of the duplicate entries and
  54 #       only keep the latest. We then sort on the name, and line
  55 #       number (line number in reverse). The line numbers are then
  56 #       removed and duplicate entries are cut out.
  57 #
  58         cat -n $FILE_TO_CLEAN | sort -k 2,2 -k 1,1nr 2> /dev/null \
  59                 | cut -f2- | \
  60                 awk ' (NR > 1 && $1 != key) || NR == 1 {
  61                                 key = $1;
  62                                 print $0;
  63                         }
  64                 ' > $TMP_FILE
  65
  66         if [ $? -eq 0 ] && mv $TMP_FILE $FILE_TO_CLEAN; then
  67 #
  68 #               update time stamp for this sort
  69 #
  70                 touch -r $FILE_TO_CLEAN $CLEAN_TIME
  71         else
  72                 rm -f $TMP_FILE
  73         fi
  74 fi