OpenPKG Specs: openpkg/aux.usrgrp.sh@41738a0e98d1 (annotated)

openpkg/aux.usrgrp.sh@41738a0e98d1 (annotated)

openpkg/aux.usrgrp.sh

Tue, 29 Nov 2011 18:44:37 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 29 Nov 2011 18:44:37 +0100
changeset 395: 41738a0e98d1
permissions: -rw-r--r--

Reduce private memory allocation after observing stable operation.

 #!/bin/sh
 ##
 ##  usrgrp.sh -- user/group name/id determination
 ##  Copyright (c) 2000-2007 OpenPKG Foundation e.V. <http://openpkg.net/>
 ##  Copyright (c) 2000-2007 Ralf S. Engelschall <http://engelschall.com/>
 ##
 ##  Permission to use, copy, modify, and distribute this software for
 ##  any purpose with or without fee is hereby granted, provided that
 ##  the above copyright notice and this permission notice appear in all
 ##  copies.
 ##
 ##  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 ##  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 ##  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 ##  IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
 ##  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ##  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ##  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 ##  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 ##  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 ##  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 ##  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 ##  SUCH DAMAGE.
 ##
 #   command line parameters (defaults)
 help=0
 usr='';  grp=''
 susr=''; sgrp=''
 musr=''; mgrp=''
 rusr=''; rgrp=''
 nusr=''; ngrp=''
 suid=''; sgid=''
 muid=''; mgid=''
 ruid=''; rgid=''
 nuid=''; ngid=''
 #   parse command line options
 for opt
 do
     case $opt in
         -*=*) arg=`echo "$opt" | sed 's/^[-_a-zA-Z0-9]*=//'` ;;
            *) arg='' ;;
     esac
     case $opt in
         -h | --help          ) help=1      ;;
         --usr=* | --user=*   ) usr=$arg    ;;
         --grp=* | --group=*  ) grp=$arg    ;;
         --susr=*             ) susr=$arg   ;;
         --sgrp=*             ) sgrp=$arg   ;;
         --musr=*             ) musr=$arg   ;;
         --mgrp=*             ) mgrp=$arg   ;;
         --rusr=*             ) rusr=$arg   ;;
         --rgrp=*             ) rgrp=$arg   ;;
         --nusr=*             ) nusr=$arg   ;;
         --ngrp=*             ) ngrp=$arg   ;;
         --suid=*             ) suid=$arg   ;;
         --sgid=*             ) sgid=$arg   ;;
         --muid=*             ) muid=$arg   ;;
         --mgid=*             ) mgid=$arg   ;;
         --ruid=*             ) ruid=$arg   ;;
         --rgid=*             ) rgid=$arg   ;;
         --nuid=*             ) nuid=$arg   ;;
         --ngid=*             ) ngid=$arg   ;;
         *                    ) help=1      ;;
     esac
 done
 if [ ".$help" = .1 ]; then
     echo "Usage: sh $0 [-h|--help]" 2>&1
     echo "             [--[smrn]?usr=<usr>] [--[smrn]?grp=<usr>]" 2>&1
     echo "             [--[smrn]uid=<uid>] [--[smrn]gid=<gid>]" 2>&1
     exit 1
 fi
 #   determine cusr/cgrp
 cusr=`(id -un) 2>/dev/null ||\
       (id | sed -e 's;^[^(]*(\([^)]*\)).*;\1;') 2>/dev/null ||\
       (whoami) 2>/dev/null ||\
       (who am i | cut "-d " -f1) 2>/dev/null ||\
       echo $LOGNAME`
 cgid=`(id -g $cusr) 2>/dev/null ||\
       ((getent passwd "${cusr}"; grep "^${cusr}:" /etc/passwd; ypmatch "${cusr}" passwd; nismatch "${cusr}" passwd; nidump passwd . | grep "^${cusr}:") 2>/dev/null |\
        sed -n -e '1p' | awk -F: '{ print $4; }')`
 cgrp=`(id -gn $cusr) 2>/dev/null ||\
       ((getent group; cat /etc/group; ypcat group; niscat group; nidump group .) 2>/dev/null | grep "^[^:]*:[^:]*:${cgid}:" |\
        sed -n -e '1p' | awk -F: '{ print $1; }')`
 [ ".$cgrp" = . ] && cgrp="$cusr"
 #   determine OpenPKG susr/sgrp
 if [ ".$susr" = . ]; then
     if [ ".$usr" = . ]; then
         susr="$cusr"
     else
         susr="root"
     fi
 fi
 if [ ".$sgrp" = . ]; then
     sgrp=`(id -gn $susr) 2>/dev/null`
     if [ ".$sgrp" = . ]; then
         tgid=`(getent passwd "${susr}"; grep "^${susr}:" /etc/passwd; ypmatch "${susr}" passwd; nismatch "${susr}" passwd; nidump passwd . | grep "^${susr}:") 2>/dev/null |\
               sed -n -e '1p' | awk -F: '{ print $4; }'`
         if [ ".$tgid" != . ]; then
             sgid="${tgid}"
             sgrp=`(getent group; cat /etc/group; ypcat group; niscat group; nidump group .) 2>/dev/null |\
                   grep "^[^:]*:[^:]*:${sgid}:" | sed -n -e '1p' | awk -F: '{ print $1; }'`
         fi
         if [ ".$sgrp" = . ]; then
             sgrp="wheel"
         fi
     fi
 fi
 #   determine OpenPKG musr/mgrp
 if [ ".$musr" = . ]; then
     musr="$usr"
 fi
 if [ ".$musr" = . ]; then
     musr="$cusr"
 fi
 if [ ".$mgrp" = . ]; then
     mgrp=`(id -gn $musr) 2>/dev/null`
     if [ ".$mgrp" = . ]; then
         tgid=`(getent passwd "${musr}"; grep "^${musr}:" /etc/passwd; ypmatch "${musr}" passwd; nismatch "${musr}" passwd; nidump passwd . | grep "^${musr}:") 2>/dev/null |\
               sed -n -e '1p' | awk -F: '{ print $4; }'`
         if [ ".$tgid" != . ]; then
             mgid="${tgid}"
             mgrp=`(getent group; cat /etc/group; ypcat group; niscat group; nidump group .) 2>/dev/null |\
                   grep "^[^:]*:[^:]*:${mgid}:" | sed -n -e '1p' | awk -F: '{ print $1; }'`
         fi
         if [ ".$mgrp" = . ]; then
             mgrp="$grp"
         fi
         if [ ".$mgrp" = . ]; then
             mgrp="$cgrp"
         fi
     fi
 fi
 #   determine OpenPKG rusr/rgrp
 if [ ".$rusr" = . ]; then
     rusr="${usr}-r"
 fi
 if [ ".$rusr" = ".-r" ]; then
     rusr="$cusr"
 fi
 if [ ".$rgrp" = . ]; then
     rgrp=`(id -gn $rusr) 2>/dev/null`
     if [ ".$rgrp" = . ]; then
         tgid=`(getent passwd "${rusr}"; grep "^${rusr}:" /etc/passwd; ypmatch "${rusr}" passwd; nismatch "${rusr}" passwd; nidump passwd . | grep "^${rusr}:") 2>/dev/null |\
               sed -n -e '1p' | awk -F: '{ print $4; }'`
         if [ ".$tgid" != . ]; then
             rgid="${tgid}"
             rgrp=`(getent group; cat /etc/group; ypcat group; nismatch group; nidump group .) 2>/dev/null |\
                   grep "^[^:]*:[^:]*:${rgid}:" | sed -n -e '1p' | awk -F: '{ print $1; }'`
         fi
         if [ ".$rgrp" = . ]; then
             rgrp="${grp}-r"
         fi
         if [ ".$rgrp" = ".-r" ]; then
             rgrp="$cgrp"
         fi
     fi
 fi
 #   determine OpenPKG nusr/ngrp
 if [ ".$nusr" = . ]; then
     nusr="${usr}-n"
 fi
 if [ ".$nusr" = ".-n" ]; then
     nusr="$cusr"
 fi
 if [ ".$ngrp" = . ]; then
     ngrp=`(id -gn $nusr) 2>/dev/null`
     if [ ".$ngrp" = . ]; then
         tgid=`(getent passwd "${nusr}"; grep "^${nusr}:" /etc/passwd; ypmatch "${nusr}" passwd; nismatch "${nusr}" passwd; nidump passwd . | grep "^${nusr}:") 2>/dev/null |\
               sed -n -e '1p' | awk -F: '{ print $4; }'`
         if [ ".$tgid" != . ]; then
             ngid="${tgid}"
             ngrp=`(getent group; cat /etc/group; ypcat group; niscat group; nidump group .) 2>/dev/null |\
                   grep "^[^:]*:[^:]*:${ngid}:" | sed -n -e '1p' | awk -F: '{ print $1; }'`
         fi
         if [ ".$ngrp" = . ]; then
             ngrp="${grp}-n"
         fi
         if [ ".$ngrp" = ".-n" ]; then
             ngrp="$cgrp"
         fi
     fi
 fi
 #   determine OpenPKG suid/sgid
 #   (currently not necessary)
 #   determine OpenPKG muid/mgid
 #   (currently not necessary)
 #   determine OpenPKG ruid/rgid
 #   (currently not necessary)
 #   determine OpenPKG nuid/ngid
 #   (currently not necessary)
 #   print results
 output=""
 for var in \
     susr sgrp \
     musr mgrp \
     rusr rgrp \
     nusr ngrp \
     suid sgid \
     muid mgid \
     ruid rgid \
     nuid ngid; do
     eval "val=\"\$$var\""
     if [ ".$output" = . ]; then
         output="$var=\"$val\""
     else
         output="$output; $var=\"$val\""
     fi
 done
 echo $output

OpenPKG Specs / annotate

openpkg/aux.usrgrp.sh@41738a0e98d1 (annotated)

openpkg/aux.usrgrp.sh