如何从字符串中提取信息

可以在bash版本中使用regex匹配>=3.2:

[[ $line =~ ([[:digit:]]+).*([[:digit:]]+).*([[:digit:]]+).*([[:digit:]]+) ]]

RECORDS=${BASH_REMATCH[1]}
DELETED=${BASH_REMATCH[2]}
SKIPPED=${BASH_REMATCH[3]}
WARNING=${BASH_REMATCH[4]}

内置的 read 命令可以做到这一点:

read TMP1 RECORDS TMP2 DELETED TMP3 SKIPPED TMP4 WARNING

更新 :您也可以使用 set :

set $line
RECORDS=$2
DELETED=$4
SKIPPED=$6
WARNING=$8

这里有一个shell函数,您可以使用它来创建许多名称/值对。它假定事情的格式与您所说的一样,但很容易更改:

parseline() {
    while [ $# -ge 2 ] ; do
        eval $(echo $1 | tr -d : | tr '[a-z]' '[A-Z]')="$2"
        shift 2
    done
}

按如下方式执行:

$ parseline Records: 2910 Deleted: 0 Skipped: 0 Warnings: 0
$ echo $RECORDS
2910
$ echo $WARNINGS
0

根据线的结构,可以尝试使用“sed”或“cut”:

#!/bin/sh                                                                       

DYNAMIC="Records: 2910 Deleted: 1 Skipped: 2 Warnings: 3"

RECORDS=`echo "$DYNAMIC" | sed 's/.*Records: \([0-9]*\).*/\1/g'`
DELETED=`echo "$DYNAMIC" | sed 's/.*Deleted: \([0-9]*\).*/\1/g'`
SKIPPED=`echo "$DYNAMIC" | sed 's/.*Skipped: \([0-9]*\).*/\1/g'`
WARNINGS=`echo "$DYNAMIC" | sed 's/.*Warnings: \([0-9]*\).*/\1/g'`

echo "Records $RECORDS"
echo "Deleted $DELETED"
echo "Skipped $SKIPPED"
echo "Warnings $WARNINGS"

echo "$DYNAMIC" | cut -d " " -f2
echo "$DYNAMIC" | cut -d " " -f4
echo "$DYNAMIC" | cut -d " " -f6
echo "$DYNAMIC" | cut -d " " -f8

#!/bin/bash
s="Records: 2910 Deleted: 0 Skipped: 0 Warnings: 0"
s=${s//: /=}
for i in $(printf ${s// /"\n"})
do
 eval $i
done

echo "Records: $Records"
echo "Deleted: $Deleted"
echo "Skipped: $Skipped"
echo "Warnings: $Warnings"

输出

$ ./shell.sh
Records: 2910
Deleted: 0
Skipped: 0
Warnings: 0