# SccsId[] = "%W% (USL function) %G%"
              CO_name="CHOWN_EXIT_ERR"
              if [ ".${SECONDS}" = "." ]; then # Bourne function already loaded?
                 [ ."`set|egrep '^$CO_name\(\)\{$'`" != . ] && CO_loaded=1
              else # Korn or Bash shell and function already loaded?
                 if [ `expr "\`uname -s\`" : "[Ll][Ii][Nn][Uu][Xx]"` -eq 0 ]; then
                    [ ."`typeset +f|awk '/^'$CO_name'[=\(]?/'`" != . ] && CO_loaded=1
                 else # Linux
                    [ ."`typeset -F|awk '/^'$CO_name'[=\(]?/'`" != . ] && CO_loaded=1
                 fi
              fi
              if [ 0${CO_loaded} -eq 0 ]; then
              #----------------------------------------------------------------------#
              CHOWN_EXIT_ERR() # Function documentation located at bottom.           #
              #----------------------------------------------------------------------#
              { [ ."${AWK}" = . ] && { { [ -x /usr/bin/nawk ] && AWK=/usr/bin/nawk; } \
                                  ||   { [ -x /bin/gawk     ] && AWK=/bin/gawk    ; } \
                                  ||   { [ -x /usr/bin/awk  ] && AWK=/usr/bin/awk ; }; }

                if [ .${SHLIB} = . ]; then SHLIB=/usr/local/scripts; export SHLIB; fi

                . $SHLIB/email_msg.sh # Calls $SHLIB/exit.sh

                #------------------------------------------------------------#
                # If the following variables are not set, use these defaults.#
                #------------------------------------------------------------#
                : ${script_name:=`basename $0`}
                : ${name_root:=`echo $script_name|$AWK '{sub(/^\.+/,"");sub(/\..*/,"");print}'`}
                : ${logger_p="user.err"}
                : ${logger_t="$LOGNAME[$$]"}
                : ${verbose:=0}
                : ${sp:="                    "}
                : ${dashes:="------------------------------------------------------"}
                : ${tmp:=/var/tmp}

                if [ ."$log" = . ]; then
                   log=$name_root.log
                   [ ."$teelog" = . ] && teelog="cat"
                fi

                CO_ID="$script_name($CO_name)"

                #--------------------------------------------------------------------#
                #               Process function options and arguments               #
                #               --------------------------------------               #
                # We use while-loop instead of getopts because -p (logger priority)  #
                # option and -t (logger tag option) may or may not have an optarg    #
                # (the user may just want the defaults).                             #
                #--------------------------------------------------------------------#
                CO_options="lptv"
                CO_opt_l=0
                CO_opt_p=0
                CO_opt_t=0
                CO_opt_v=0
                CO_pri="$logger_p" # $logger_p and $logger_t are assigned defaults
                CO_tag="$logger_t" # within library defaults.sh.
                CO_opts=""
                CO_args=""
                while [ ."$1" != . ]
                do
                   #-------------------------------------------------------------#
                   # If we have an option list (e.g. "-xyz") change that list to #
                   # individual "-x -y -z" options.  Else, just pass the option  #
                   # along.                                                      #
                   #-------------------------------------------------------------#
                   CO_n=`expr "$1". : '-.*'`
                   if [ $CO_n -gt 0 ]; then
                      if [ $CO_n -eq 2 ]; then
                         CO_optargs="$1"
                      else
                         CO_optargs=`echo "$1"|sed 's/[a-zA-Z]/-& /g;s/--*/-/'`
                      fi

                      for CO_optarg in $CO_optargs
                      do
                         case $CO_optarg in
                           -l ) CO_opt_l=1
                                . $SHLIB/write_err_to_syslogs.sh
                                ;;
                           -p ) if [ $CO_opt_l -eq 1 -a $CO_opt_p -eq 0 ]; then
                                   CO_opt_p=1
                                   if [ -`expr "$2" : '\(\-\)['$CO_options']'` != "--" ]; then
                                      CO_pri="$2"
                                      shift
                                   fi
                                else
                                   CO_opts="$CO_opts $CO_optarg"
                                fi
                                ;;
                           -t ) if [ $CO_opt_l -eq 1 -a $CO_opt_t -eq 0 ]; then
                                   CO_opt_t=1
                                   CO_tag="$2"
                                   if [ -`expr "$2" : '\(\-\)['$CO_options']'` != "--" ]; then
                                      CO_tag="$2"
                                      shift
                                   fi
                                else
                                   CO_opts="$CO_opts $CO_optarg"
                                fi
                                ;;
                           -v ) CO_opt_v=1
                                ;;
                         esac
                      done # for CO_optarg in $CO_optargs
                   else
                      [ ."$CO_args" != . ]        \
                        && CO_args="$CO_args|$1" \
                        || CO_args="$1"
                   fi
                   shift
                done # while [ ."$1" != . ]
                CO_opts=`expr "$CO_opts" : ' *\(.*\)'` # Strip leading blanks
                CO_args=`expr "$CO_args" : '|*\(.*\)'` # Strip leading stiles

                #----------------------------------------------------------#
                # If we still have args, then the first MUST be the owner. #
                #----------------------------------------------------------#
                if [ ."$CO_args" != . ]; then
                   CO_owner=""
                   echo "$CO_args"|awk -F\| '{for (i=1;i<=NF;i++) print $i}' \
                    | while read CO_file
                      do
                         if [ ."$CO_owner" = . ]; then
                            CO_owner="$CO_file" # 1st arg MUST be the owner.
                            CO_cmd="chown $CO_opts $CO_owner"
                            continue            # Got it, so iterate our for-loop.
                         fi

                         CO_status=0
                         if [ ! \( -f "$CO_file" -o -d "$CO_file" \) ]; then
                            CO_m1="Skipping $CO_cmd '$CO_file'."
                            CO_m2="'$CO_file' not found!"
                            CO_m3="$script_name continues."
                            EMAIL_MSG "WARNING: $CO_ID"     \
                              "${sp}$CO_m1"                 \
                              "${sp}$CO_m2"                 \
                              "${sp}$CO_m3"
                         elif [ -w "$CO_file" ]; then # If writable, then do ...
                            [ $verbose -eq 1 -o $CO_opt_v -eq 1 ] \
                              && echo "`date '+%Y-%m-%d %T'` $CO_cmd \"$CO_file\"" \
                                | $teelog
                            CO_stderr=`$CO_cmd "$CO_file" 2>&1`
                            CO_status=$?
                            if [ $CO_status -ne 0 ]; then
                               CO_m1="'$CO_cmd \"$CO_file\"'"
                               CO_m2="ERROR=$CO_stderr."
                               CO_m3="$script_name terminated."
                               CO_m4=`ls -al "$CO_file"|sed "s/^/$sp/"`
                               EMAIL_MSG "FATAL ERROR: $CO_ID"              \
                                 "${sp}$CO_m1"                              \
                                 "${sp}$CO_m2"                              \
                                 "${sp}$CO_m3  File list (if any) follows:" \
                                 "${sp}$dashes"                             \
                                 "$CO_m4"

                               if [ $CO_opt_l -eq 1 ]; then # Logger option? (1 = yes)
                                  WRITE_ERR_TO_SYSLOGS -p "$CO_pri" -t "$CO_tag" \
                                    "ABORT: $CO_ID $CO_m1 $CO_m2 $CO_m3"
                               fi
                               EXIT 1
                            fi # if [ $CO_status -ne 0 ]; then
                         else
                            CO_m1="Skipping '$CO_cmd \"$CO_file\"'"
                            CO_m2="$CO_file not writable!"
                            CO_m3="$script_name continues."
                            EMAIL_MSG "WARNING: $CO_ID" \
                              "${sp}$CO_m1"             \
                              "${sp}$CO_m2"             \
                              "${sp}$CO_m3"
                         fi # if [ -w $CO_file ]; then, else
                      done # while read CO_file
                   return 0
                fi # if [ ."$CO_args" != . ]; then

                #--------------------------------------------------------------------#
                # Reaching this point with zero status means insufficient args error.#
                #--------------------------------------------------------------------#
                CO_m1="Insufficient args."
                CO_m2="$script_name terminated."
                EMAIL_MSG "FATAL ERROR (Function): $CO_ID"                 \
                  "${sp}$CO_m1.\n"                                         \
                  "${sp}Usage: $CO_name -l -p priority -t tag -v"          \
                  "${sp}                     owner fileid [...]\n"         \
                  "${sp}                -l = Notify via logger command"    \
                  "${sp}                     (default is false)"           \
                  "${sp}                -p = Logger priority string"       \
                  "${sp}                     (default is 'user.err')"      \
                  "${sp}                -t = Logger tag string"            \
                  "${sp}                     (default is '$LOGNAME[$$]')"  \
                  "${sp}                -v = Verbose\n"                    \
                  "${sp}Option notes: Option (-l) MUST precede -p and -t." \
                  "${sp}$CO_m2"
                if [ $CO_opt_l -eq 1 ]; then # Logger option? (1 = yes)
                   WRITE_ERR_TO_SYSLOGS -p "$CO_pri" -t "$CO_tag" \
                     "ABORT: $CO_ID $CO_m1 $CO_m2"
                fi

                EXIT 1
              } # "CO_" prefix identifies this function's local variables.
              fi

              #======================================================================#
              #                       D O C U M E N T A T I O N                      #
              #======================================================================#
              #                                                                      #
              #      Author: Bob Orlando (Bob@OrlandoKuntao.com)                     #
              #                                                                      #
              #        Date: December 14, 1996                                       #
              #                                                                      #
              #  Program ID: chown_exit_err.sh                                       #
              #                                                                      #
              #       Usage: CHOWN_EXIT_ERR -l -p priority -t tag -v \               #
              #                                  owner fileid ...                    #
              #                                                                      #
              #                             -l = Notify via logger command           #
              #                                  (default is false)                  #
              #                             -p = Logger priority string              #
              #                                  (default is "user.err")             #
              #                             -t = Logger tag string                   #
              #                                  (default is "$LOGNAME[$$]")         #
              #                             -v = Verbose                             #
              #                                                                      #
              #              Option notes: Option (-l) MUST precede other options.   #
              #                            'UNIX command options' MUST follow        #
              #                            function options.  If command option      #
              #                            is -l, -p, or -t, and you've specified    #
              #                            function option -l, then you must also    #
              #                            supply both function options, -p and -t.  #
              #                                                                      #
              #     Purpose: Change ownership on one or more files, reporting        #
              #              errors via email and logger, and exiting on error.      #
              #                                                                      #
              # Description: This function adds no new functionality to the UNIX     #
              #              chown command beyond automatic notification/logging     #
              #              before exiting on error.  Notification is provided      #
              #              via the EMAIL_MSG library function.  Optionally         #
              #              (-l), the user may have the error logged in syslogs     #
              #              (/var/adm/messages) via logger command.  Logger -p      #
              #              and -t options and option arguments also may be         #
              #              be passed (both have defaults if omitted).              #
              #                                                                      #
              #     Globals: No global variables assigned from this function.        #
              #              "CO_" prefix identifies local function variables.       #
              #                                                                      #
              # Exit_status: Exits with failure (1) on error.  This is because       #
              #              any error while changing file permissions (ownership)   #
              #              is potentially a show stopper.                          #
              #                                                                      #
              #       Calls: EMAIL_MSG and EXIT library functions.                   #
              #              Optionally, WRITE_ERR_TO_SYSLOGS is also called.        #
              #                                                                      #
              #       Notes: DO NOT use this routine to chown $log and $mailmsg.     #
              #              Use CHOWN_EXIT_ERR_NOMAIL instead.  This is because     #
              #              this function calls EMAIL_MSG function (a function      #
              #              which uses both $log and $mailmsg to report problems).  #
              #              Any problems changing $log and $mailmsg, therefore,     #
              #              cannot be reported by EMAIL_MSG using mailx.            #
              #                                                                      #
              #    Modified: 2004-04-02 Bob Orlando                                  #
              #                 v1.17 * Expand $AWK testing and assignment.          #
              #                                                                      #
              #              2004-03-03 Bob Orlando                                  #
              #                 v1.16 * Change set|egrep|awk to just set|egrep.      #
              #                                                                      #
              #----------------------------------------------------------------------#
            
Artificial Intelligence is no match for natural stupidity.
©Copyright Bob Orlando, 1996-2011
All rights reserved.
http://www.OrlandoKuntao.com
E-mail: Bob@OrlandoKuntao.com
Last update: Jan. 26, 2011
by Bob Orlando