SHELL 常用自定义函数
#获取特殊ASCII不可见字符
GetAscii(){
if [ $# -ne 1 -o $1 -lt 0 -o $1 -gt 127 ]
then
echo "######################################"
echo "USAGE:"
echo " GetAscii NUM "
echo " NUM NUM must great or equal 0 "
echo " and NUM less or equal 127"
echo "######################################"
else
awk -v char=$1 'BEGIN {printf "%c",char;exit}'
fi
}
#得到前一天日期
GetPrevDate(){
if [ $# -eq 0 ];then
CurDate=`date +%Y%m%d`
else
CurDate=$1
fi
CurYear=`echo $CurDate | cut -c1-4`
CurMonth=`echo $CurDate | cut -c5-6`
CurDay=`echo $CurDate | cut -c7-8`
?
GetYear="$CurYear"
GetMonth="$CurMonth"
GetDay="`expr $CurDay -1`"
?
if [ "$GetDay" -le 0 ];then
GetMonth=`expr $CurMonth -1`
if [ "$GetMonth" -le 0 ];then
GetYear=`expr $CurYear -1`
GetMonth=12
fi
case "$GetMonth"
in
1|3|5|7|8|10|12)
GetDay=31;;
4|6|9|11)
GetDay=30;;
2)
if [ `expr "$CurYear" %400` -eq 0 ];then
GetDay=29
elif [ `expr "$CurYear" %4` -eq 0 -a `expr "$CurYear" %100` -ne 0];then
GetDay=29
else
GetDay=28
fi
esac
fi
if [ `echo "$GetMonth" | wc -m` -ne 3 ];then
GetMonth=0$GetMonth
fi
fi [ `echo "$GetDay" | wc -m` -ne 3 ];then
GetDay=0$GetDay
fi
echo "$GetYear""$GetMonth""$GetDay"
?
}
?
#得到后一天日期
GetNextDate()
{
if (test $# -eq 0)
then
CurDate=`date +%Y%m%d`
else
CurDate=$1
fi
CurYear=`echo $CurDate | cut -c1-4`
CurMonth=`echo $CurDate | cut -c5-6`
CurDay=`echo $CurDate | cut -c7-8`
GetYear="$CurYear"
GetMonth="$CurMonth"
GetDay="`expr $CurDay + 1`"
case "$GetMonth"
in
01|03|05|07|08|10|12)
MaxDay=31;;
04|06|09|11)
MaxDay=30;;
02)
if [ `expr "$CurYear" % 400` -eq 0 ]; then
MaxDay=29
elif [ `expr "$CurYear" % 4` -eq 0 -a `expr "$CurYear" % 100` -ne 0 ]; then
MaxDay=29
else
MaxDay=28
fi
esac
?
if [ "$GetDay" -gt "$MaxDay" ]; then
GetMonth=`expr $CurMonth + 1`
GetDay=01
if [ $GetMonth -gt 12 ] ; then
GetYear=`expr $CurYear + 1`
GetMonth=01
fi
?
fi
if [ `echo "$GetMonth" | wc -m` -ne 3 ] ; then
GetMonth=0$GetMonth
fi
if [ `echo "$GetDay" | wc -m` -ne 3 ] ; then
GetDay=0$GetDay
fi
echo "$GetYear""$GetMonth""$GetDay"
}
#得到上一个月份
GetLastMonth_1st()
{
yearName=`date +%Y`
monthName=`date +%m`
if [ ${monthName} -eq 1 ] ; then
yearName=`expr ${yearName} - 1`
monthName=12
else
monthName=`expr ${monthName} - 1`
monthName=`printf "%.2d" ${monthName}`
fi
echo ${yearName}${monthName}
}
#当前日期戳
GetTime(){
echo `date +%Y`"年 "`date +%m`"月"`date +%d`"日 "`date +%H`":"`date +%M`":"`date +%S`
}
