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|
#!/bin/bash
_E_WIDTH=15
_E_COUNT=0
_E_FLAGS=0
_E_FLAGS_STR=""
_E_FLAG_FAILURE=1
_E_FLAG_EXIT_STANDARD=2
_E_FLAG_EXIT_NONSTANDARD=4
_E_FLAG_EXIT_SIGNALED=8
_E_FLAG_EXIT_PEBKAC=16
_E_FLAG_HALT_AND_CATCH_FIRE=32
_E_FLAG_BAD_ARGUMENT=64
_E_FLAG_BAD_RETVAL=128
_E_FLAG_BAD_PACKAGE=256
_E_FLAG_RES4=512
_E_FLAG_RES5=1024
_E_FLAG_RES6=2048
_E_FLAG_RES7=4096
_E_FLAG_RES8=8192
_E_FLAG_RES9=16384
_E_FLAG_INTERNAL=32768
#_E_FLAG_UNUSED=65536
function error_mask_report
{
local flags=$1
for (( i=${_E_WIDTH}; i>=0; i-- ))
do
(( mask = flags & ( 1 << i ) ))
case $mask in
$_E_FLAG_FAILURE)
echo "Script failed."
;;
$_E_FLAG_EXIT_STANDARD)
echo "Normal exit."
;;
$_E_FLAG_EXIT_NONSTANDARD)
echo "Non-standard exit."
;;
$_E_FLAG_EXIT_SIGNALED)
echo "Recievied signal."
;;
$_E_FLAG_EXIT_PEBCAC)
echo "Problem exists between keyboard and chair."
;;
$_E_FLAG_HALT_AND_CATCH_FIRE)
echo "A fatal error occurred."
;;
$_E_FLAG_BAD_ARGUMENT)
echo "Bad argument."
;;
$_E_FLAG_BAD_RETVAL)
echo "An external program exited abnormally."
;;
$_E_FLAG_BAD_PACKAGE)
echo "A package failed to build."
;;
$_E_FLAG_RES4)
echo "Reserved"
;;
$_E_FLAG_RES5)
echo "Reserved"
;;
$_E_FLAG_RES6)
echo "Reserved"
;;
$_E_FLAG_RES7)
echo "Reserved"
;;
$_E_FLAG_RES8)
echo "Reserved"
;;
$_E_FLAG_RES9)
echo "Reserved"
;;
$_E_FLAG_INTERNAL)
echo "Error handler experienced an internal error."
;;
*)
;;
esac
done
}
function error_report
{
local flags=`error_mask_string`
printf "Error count: %16s\n" $_E_COUNT
printf "Error mask: %16s\n" $_E_FLAGS
printf "Error flags: %16s\n" $flags
echo "Error message(s):"
while read line
do
echo "* $line"
done< <(error_mask_report $_E_FLAGS)
}
function error_set
{
local flag=$1
if [[ -z $flag ]]; then
echo "error.sh: Unable to set error flag: '$flag'"
flag=$_E_FLAG_INTERNAL
fi
(( _E_FLAGS |= $flag ))
(( _E_COUNT++ ))
#echo "Error flag modified: $_E_FLAGS_STR"
}
function error_mask_string
{
declare -a -i bits
local flags=$_E_FLAGS
local output=""
for i in $(seq 0 $_E_WIDTH)
do
(( bits[i] = 0 ))
(( bit = flags >> i ))
if (( flags & ( 1 << i ) )); then
(( bits[i] = 1 ))
fi
done
for (( x=${_E_WIDTH}; x>=0; x-- ))
do
output+=$(( bits[x] ))
done
echo $output
}
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