Question

我有一个包含以下信息的源文件。

WABEL8499IPM101
WABEL8499IPM102
WABEL8499IPM103
WABEL8499IPM104
WABEL8499IPM105
WABEL8499IPM106
WABEL8499IPM107
WABEL8499IPM108

我需要能够找到序列中最大的名称，然后使用序列中的下一个逻辑名称创建一个新变量。如果需要，我需要能够创建多个。例如：

使用grep在文件中搜索WABEL8499IPM，该文件显示了以上所有结果。我需要找到WABEL8499IPM108，因为它是序列中最大的，然后使用值WABEL8499IPM109创建一个新变量（多少取决于用户输入的值）。如果用户输入数量2，则我需要109和110。我的目标是构建一个bash脚本以输入基本名称（不包含最后3位数字），在序列中找到最大的名称，然后将其输出到日志文件中。用户需要多次使用顺序中的下一个名称。

我不太确定从哪里开始。我可以找到所有使用grep的人，但是很难找到最大的值/序列。用户将只输入基本名称，因为他们不知道最后3位数字。目前，我没有任何有效的代码。

SRCFILE="~/Desktop/deviceinfo.csv"  
LOGDIR="~/Desktop/"  
LOGFILE="$LOGDIR/DeviceNames.csv"  

echo -e "\n"  
echo "What is the base device name?"  
read deviceName  
echo "How many device names do you need?"  
read quantityName  
lines=$(grep -c "$deviceName" $SRCFILE)  
echo -e "\n"  
echo "There are $lines results."  
deviceResults=$(grep -F "$deviceName" $SRCFILE)  
echo -e "\n"  
echo Device Name\'s Currently Enrolled:  
echo "$deviceResults"  
echo -e "\n" 
echo "Your output file has been created."
CODE FOR CREATING OUTPUT FILE HERE
echo "$deviceName1" >> "$LOGFILE"  
echo "$deviceName2" >> "$LOGFILE"  
echo "$deviceName3" >> "$LOGFILE"

这种方法是否可以使用参考文件作为输入？例如，如果我必须研究和创建数量不同的多个名称，是否可以为此使用输入参考文件，这样就不必分别键入每个名称并多次运行脚本了？

Answer 1

SRCFILE="~/Desktop/deviceinfo.csv"  
LOGDIR="~/Desktop/"  
LOGFILE="$LOGDIR/DeviceNames.csv"  

# base name, such as "WABEL8499IPM"
device_name=$1
# quantity, such as "2"
quantityNum=$2

# the largest in sequence, such as "WABEL8499IPM108"
max_sequence_name=$(cat $SRCFILE | grep -o -e "$device_name[0-9]*" | sort --reverse | head -n 1)

# extract the last 3digit number (such as "108") from max_sequence_name
max_sequence_num=$(echo $max_sequence_name | rev | cut -c 1-3 | rev)

# creat a sequence of files starting from "WABEL8499IPM101"  if there is not any "WABEL8499IPM". 
if [ -z "$max_sequence_name" ];
then    
    max_sequence_name=device_name
    max_sequence_num=100
fi

# create new sequence_name
# such as ["WABEL8499IPM109", "WABEL8499IPM110"]
array_new_sequence_name=()
for i in $(seq 1 $quantityNum);
do
    cnum=$((max_sequence_num + i))
    array_new_sequence_name+=($(echo $device_name$cnum))
done

#CODE FOR CREATING OUTPUT FILE HERE
#for fn in ${array_new_sequence_name[@]}; do touch $fn; done;

# write log
for sqn in ${array_new_sequence_name[@]};
do
    echo $sqn >> $LOGFILE
done

用法：

bash test.sh WABEL8499IPM 2

日志文件中的结果：

WABEL8499IPM109
WABEL8499IPM110

已编辑

输入参考文件（input.txt）：

WABEL8499IPM,2
WABEL8555IPM,6
WABEL8444IPM,5

驱动程序外壳脚本：

INPFIL="./input.txt"
PSRC="./test.sh"    

cat $INPFIL | while read line; 
do
    device_name=`echo $line | cut -d "," -f 1`
    quantity_num=`echo $line | cut -d "," -f 2`
    bash $PSRC $device_name $quantity_num
done;

Answer 2

您可以尝试

logdir="~/Desktop/"  
srcfile="$logdir/deviceinfo.csv"  
logfile="$logdir/DeviceNames.csv"  

echo
read -p "What is the base device name? " deviceName
echo
read -p "How many device names do you need? " quantityName
echo

awk -v name="$deviceName" \
  -v q="$quantityName" \
  -v lelog="$logfile" '
  $0 ~ "^"name {
    sub(name,"")
    a=a>$0?a:$0
    }
  END {
    if ( a )
        for ( i = 1 ; i <= q ; i++ )
            print name ( a + i ) >> lelog
    }
' "$srcfile"

使用awk打印最大的字母数字grep结果并按顺序创建下一个变量

2 个答案: