Code:
#!/bin/sh
function printhelp {
echo "srt - compare lines from two sources and output from one or both sources depending"
echo "on options supplied."
echo "Licensed under the GPL v2, Copyright (C) 2010 Brandon Captain"
echo ""
echo "return value is 1 if any inputs do not match/dismatch as specified."
echo ""
echo " Usage Example: cat [src1] | list [src2]"
echo " Usage Example: list [src2] [src1]"
echo ""
echo "if two files are passed as arguments, stdin is ignored."
echo ""
echo "Options:"
echo " -1 --src1 output lines from src1 only. (default)"
echo " -2 --src2 output lines from src2 only."
echo " -b --srcboth output lines from both sources."
echo ""
echo " -u --unique output unique lines (default)"
echo " -d --duplicate output duplicate lines"
echo ""
echo " -i --ignore ignore commented lines (# on first char)"
echo ""
echo " -h --help print help"
echo " -v --version print version"
}
function printversion {
echo "list"
echo "version 0.1, Copyright (C) 2010 Brandon Captain. released under the terms and conditions of the GPL v2.0"
}
if [ -z "$1" ]; then
printversion;
printhelp;
exit 1
fi
RETURN=0;
TMODE="u";
TSRC="1";
atcommand=0;
unset src1;
unset src2;
IGNORE="0";
for opt in $@; do
if [[ "${opt:0:1}" != "-" ]] ; then
COMMAND[${#COMMAND[*]}]="$opt"
continue
fi
let START=$START+${#opt}
if [ "$opt" = "-h" ] || [ "$opt" = "--help" ]; then
printversion;
printhelp;
exit 1
elif [ "$opt" = "-v" ] || [ "$opt" = "--version" ]; then
printversion;
exit 1
fi
if [ "$opt" = "-1" ] || [ "$opt" = "--src1" ]; then
TSRC="1"
continue;
fi
if [ "$opt" = "-i" ] || [ "$opt" = "--ignore" ]; then
IGNORE="1"
continue;
fi
if [ "$opt" = "-2" ] || [ "$opt" = "--src2" ]; then
TSRC="2"
continue;
fi
if [ "$opt" = "-b" ] || [ "$opt" = "--srcboth" ]; then
TSRC="b"
continue;
fi
if [ "$opt" = "-u" ] || [ "$opt" = "--unique" ]; then
TMODE="u";
continue;
fi
if [ "$opt" = "-d" ] || [ "$opt" = "--duplicate" ]; then
TMODE="d";
continue;
fi
echo "$opt is not a valid option"
exit 1
done
FSR='\n'
function dochecks {
dobreak="no"
if [[ "$TMODE" == "d" ]] ; then
if [[ "$line1" == "$line2" ]]; then
echo "$line1"
dobreak="yes"
else
RETURN=1;
fi
elif [[ "$TMODE" == "u" ]]; then
if [[ "$line1" == "$line2" ]]; then
RETURN=1;
doprint="no"
dobreak="yes"
else
doprint="yes"
fi
fi
}
function go_go_gadget_program {
for line1 in ${src2[@]}; do
if [[ "$IGNORE" == "1" ]] && [[ "${line1:0:1}" == "#" ]] ; then
continue;
fi
doprint="yes"
for line2 in ${src1[@]}; do
if [[ "$IGNORE" == "1" ]] && [[ "${line2:0:1}" == "#" ]] ; then
continue;
fi
dochecks
if [[ "$dobreak" == "yes" ]] ; then
break;
fi
done
if [[ "$TMODE" == "u" ]] && [[ "$doprint" == "yes" ]] ; then
echo "$line1"
fi
done
}
if [[ "${#COMMAND[@]}" -gt 2 ]] ; then
echo "extra options not recognized: ${COMMAND[@]:2}"
exit 1;
fi
if [[ ! -e "${COMMAND[0]}" ]] ; then
echo "file not found: ${COMMAND[0]}"
exit 1;
fi
if [[ "${#COMMAND[@]}" -eq 2 ]] && [[ ! -e "${COMMAND[1]}" ]] ; then
echo "file not found: ${COMMAND[1]}"
exit 1;
fi
if [[ "$TSRC" == "b" ]] || [[ "$TSRC" == "1" ]] ; then
while read line; do
src1[${#src1[@]}]=$line
done < ${COMMAND[0]}
if [[ "${#COMMAND[@]}" == 1 ]] ; then
while read line; do
src2[${#src2[@]}]=$line
done
elif [[ "${#COMMAND[@]}" == 2 ]] ; then
while read line; do
src2[${#src2[@]}]=$line
done < ${COMMAND[1]}
else
printversion
printhelp
fi
go_go_gadget_program
fi
if [[ "$TSRC" == "b" ]] || [[ "$TSRC" == "2" ]] ; then
while read line; do
src2[${#src2[@]}]=$line
done < ${COMMAND[0]}
if [[ "${#COMMAND[@]}" == 1 ]] ; then
while read line; do
src1[${#src1[@]}]=$line
done
elif [[ "${#COMMAND[@]}" == 2 ]] ; then
while read line; do
src1[${#src1[@]}]=$line
done < ${COMMAND[1]}
else
printversion
printhelp
fi
go_go_gadget_program
fi
exit $RETURN
