xNightR00T File Manager

#! /bin/bash
#
# Johannes Meixner <jsmeix@suse.de>, 2007, 2008, 2009, 2010, 2011

#set -x

# Make sure to have a clean environment:
export PATH="/sbin:/usr/sbin:/usr/bin:/bin"
export LC_ALL="POSIX"
export LANG="POSIX"
umask 022
# Disable bash file name globbing:
set -f

# This file name for a progress indicator is also used in Printer.ycp:
test -z "$PROGRESS" && PROGRESS="/var/lib/YaST2/autodetect_printers.progress"

MY_NAME=${0##*/}

# Create temporary file names:
TMP_DATA=$(mktemp -u /tmp/$MY_NAME.XXXXXX)
TMP_DATA_RAW=$(mktemp -u /tmp/$MY_NAME.XXXXXX)

# Test if lpstat and lpinfo are executable:
echo 'Testing if lpstat and lpinfo are executable...' >$PROGRESS
LPSTAT="$( type -P lpstat )"
if ! test -x "$LPSTAT"
then echo "Cannot execute lpstat" 1>&2
     exit 1
fi
LPINFO="$( type -P lpinfo )"
if ! test -x "$LPINFO"
then echo "Cannot execute lpinfo" 1>&2
     exit 1
fi

# Test if cupsd on localhost is accessible.
# Only on localhost print queues should be set up.
# CUPS supports even remote queue setup but this is not supported by YaST.
# Therefore explicitly the cupsd on localhost is asked for autodetected printer information.
echo 'Testing if cupsd on localhost is accessible...' >>$PROGRESS
# Since CUPS 1.4 'lpstat -r' results true even when scheduler is not running.
# Therefore we must now grep in its output:
if $LPSTAT -h localhost -r | grep -q 'scheduler is not running'
then echo "Cannot access cupsd on localhost" 1>&2
     exit 2
fi

# Input:

# Get the raw data:
echo 'Retrieving the raw data...' >>$PROGRESS
# Exit after timeout because it is a real error if lpinfo does not respond.
# In this case no empty YCP map is output so that either
# an existing YCP map could be used or YaST could also exit
# because printer setup makes not much sense when lpinfo does not respond.
# Note that lpinfo does respond when no printer can be autodetected
# e.g. when there is no locally connected printer.
# Usually "lpinfo -l -v" needs a few seconds.
# To be on the safe side, a one minute timeout is used.
# Therefore the PROGRESS file can grow up to about 3600 bytes.
MAXIMUM_WAIT="60"
$LPINFO -h localhost -l -v >$TMP_DATA_RAW &
lpinfoPID=$!
for i in $( seq $MAXIMUM_WAIT )
do ps $lpinfoPID &>/dev/null || break
   echo "Waiting for response from $LPINFO (PID $lpinfoPID)..." >>$PROGRESS
   sleep 1
done
if ps $lpinfoPID &>/dev/null
then kill -9 $lpinfoPID &>/dev/null
     echo "Aborted lpinfo after $MAXIMUM_WAIT seconds timeout." 1>&2
     echo "Aborted lpinfo after $MAXIMUM_WAIT seconds timeout." >>$PROGRESS
     exit 3
fi

# Process the data:
echo 'Got the raw data.' >>$PROGRESS
# Extract what is needed, quotation marks " are replaced by ' :
tr '"' "'" <$TMP_DATA_RAW | egrep '^Device:|uri =|make-and-model =|device-id =|info =|class =' >$TMP_DATA

# Have "^Device:" on a seperated "Device" line and convert " = " to a single space:
sed -i -e 's/^Device:/Device\n/' \
       -e 's/ = / /' $TMP_DATA

# Condense multiple spaces, convert tabs to blanks, and remove leading and trailing spaces:
sed -i -e 's/[[:space:]][[:space:]]*/ /g' \
       -e 's/^[[:space:]]*//' \
       -e 's/[[:space:]]*$//' $TMP_DATA

# Output:
echo 'Creating the YCP map...' >>$PROGRESS
# Output header:
echo "[" 

# Function to output one entry:
Output()
{ if [ -n "$URI" ]
  then echo -e "  \$[ \"uri\":\"$URI\",\n     \"model\":\"$MODEL\",\n     \"deviceID\":\"$ID\",\n     \"info\":\"$INFO\",\n     \"class\":\"$CLASS\"\n  ],"
  fi
}

# Make complete and seperated entries:
# The values are collected until a new "Device" line appears, then the values are output.
# The very first "Device" line doesn't result an output because "$URI" is an empty string.
exec <$TMP_DATA
while read KEY VALUE
do case "$KEY" in
        Device) Output
                URI=""
                MODEL=""
                ID=""
                INFO=""
                CLASS="" ;;
        uri) URI="$VALUE" ;;
        make-and-model) MODEL="$VALUE" ;;
        device-id) ID="$VALUE" ;;
        info) INFO="$VALUE" ;;
        class) CLASS="$VALUE" ;;
        *) echo "Ignoring key $KEY" 1>&2 ;;
   esac
done

# Output the last entry and a footer for YCP
Output
echo -e "  \$[]\n]"

# Remove the temporary files 
rm $TMP_DATA_RAW $TMP_DATA
echo 'Finished.' >>$PROGRESS
exit 0