抽空制作的一个取前一月份和后一月份脚本
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#!/bin/bashusage(){ echo
"Usage: $0 201401"
exit
0
}if
[ x$1 == x ];then
usage
fi year=`echo
$1|cut
-c 1-4`
month=`echo
$1|cut
-c 5-6`
next_month(){ if
[ $2 == 12 ];then
l_month=‘01‘
l_year=`expr
$1 + 1`
echo
"$l_year$l_month"
elif
[ $2 -lt 9 ];then
l_year=$1
l_month=`expr
$2 + 1`
l_month="0$l_month"
echo
"$l_year$l_month"
else
l_year=$1
l_month=`expr
$2 + 1`
echo
"$l_year$l_month"
fi
}pre_month(){ if
[ $2 -eq
1 ];then
l_month=12
l_year=`expr
$1 - 1`
echo
"$l_year$l_month"
elif
[ $2 -gt 10 ];then
l_month=`expr
$2 - 1`
l_year=$1
echo
"$l_year$l_month"
else
l_month=`expr
$2 - 1`
l_month="0$l_month"
l_year=$1
echo
"$l_year$l_month"
fi
} echo
"cur_month is $1"
l_next_month=`next_month $year $month`l_pre_month=`pre_month $year $month`echo
"next month is $l_next_month"
echo
"pre month is $l_pre_month"
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