脚本内容大概主要包括以下： 1、有且只有两个输入参数，都是必输项。 2、参数的格式是日期且格式是“yyyyMMdd"(如：20140101) 3、第二个参数一定要比第一个参数晚 4、最终的执行结果就是将两个日期区间的日期打印出来。

#!/bin/bash

startDate="$1"

endDate="$2"

DATE_FMT="%Y%m%d"

source ./log.sh

export DEBUG="true"

function showUsage() {

warn ""

warn "------------------------ Usage ----------------------------- "

warn " Syntax: checkInputDates.sh "

warn ""

warn " Remark: "

warn " 1.Two arguments are required and must with format 'YYYYmmDD'."

warn " 2.Named 'end date' argument must be greater then or equal to 'start date' argument."

warn ""

warn " Example: checkInputDates.sh 20140102 20140901"

warn "------------------------------------------------------------ "

}

DATE_FMT=${DATE_FMT:-"%Y%m%d"} ##Default with format "%Y%m%d", eg: 20140102

function checkDateValid() {

local myDate=$1

local exp="date +$DATE_FMT -d $myDate"

if [ "$myDate" == "`$exp`" ]; then

echo "1"

else

echo "0"

fi

}

###

## TODO: It's not correctly.

##

function datesDiff() {

local d1=`date -d "$1" +%s`

local d2=`date -d "$2" +%s`

##debug "Dates: "$d1 $d2

local cr=$(($d1-$d2)); ##Diff in 'day' unit.

echo $cr

}

##

# Return the day after input date.

# Usage: toTomorrow

##

function compareDates() {

## `date -d " 20141225 1 day" +%Y%m%d`

local cr=$(datesDiff $1 $2); ##Diff in 'day' unit.

##debug "Compare: $(($(date +$DATE_FMT -d $1) - $(date +$DATE_FMT -d $2)));";

if [[ $cr -eq 0 ]]; then

echo "0"

elif [[ $cr -gt 0 ]]; then

echo "1"

else

echo "-1"

fi

}

##

# Return the day after input date.

# Usage: toTomorrow

##

function toTomorrow() {

local curDate="$1"

##debug $curDate

##TODO: Must be adapted to DATE_FMT...

##curDate="${curDate:0:4}-${curDate:4:2}-${curDate:6:2}"

##debug "date -d '$curDate +1 day ' +$DATE_FMT"

##echo `date -d "$curDate +1 day " +$DATE_FMT`

##echo `date +$DATE_FMT -d "1 day $curDate"`

echo `date -d "1 day $curDate" +$DATE_FMT`

}

function countStrsByBlank() {

##local str="$1"

##local sep="${2:-' '}"

##echo $str | awk -v v="$sep" '{ split($0, a, v);for(i in a) {c=i;}} END {print c;}'

set j=0

for item in $dates

do

let j=j+1

done

echo $j

}

##

# Get the diff date list between input two dates.

# Usage: getDiffDateList

##

function getDiffDateList() {

local endd=$1

local stad=$2

dl=()

while [[ "$stad" != "$endd" ]]

do

dl=(${dl[*]} "$stad")

stad=$(toTomorrow $stad)

done

dl=(${dl[*]} "$stad")

echo "${dl[*]}"

}

###### Check inputs ################

#1. Only two arguments.

warn ""

if [ $# != 2 ]; then

warn "ERROR: Only support two arguments input." | showUsage

exit 1;

fi

#2. Check if they're the leagal value.

tmpSd=$(checkDateValid $startDate)

if [ "$tmpSd" == "0" ]; then ###It's the invalid date. eg: 20141901

warn "ERROR: Invalid 'start date' with input '$startDate', it must be with format 'yyyyMMdd', eg: 20140101" | showUsage

exit 1;

fi

tmpEd=$(checkDateValid $endDate)

if [ "$tmpEd" == "0" ]; then ###It's the invalid date. eg: 20141901

warn "ERROR: Invalid 'end date' with input '$startDate', it must be with format 'yyyyMMdd', eg: 20140101"

exit 1;

fi

#3. Check the arg2 greater than or equal arg1.

##echo "Compare result: "$(compareDates $endDate $startDate)

cprs=$(compareDates $endDate $startDate)

if [ "$cprs" == "-1" ]; then

warn "ERROR: The first argument must not greater than the second one!" | showUsage

exit 1;

fi

######################################

##loop the dates between start and end date.

while [[ "$startDate" != "$endDate" ]]

do

echo $startDate

startDate=$(toTomorrow $startDate)

done