2016 年 4 月编辑!
进一步看(更强的方法)
原帖
尝试:
#!/bin/bash
read -p "Date (format yyyy-mm-dd): " input
check=$(date +%F)
if [ "$input" == "$check" ]; then
echo "Right!"
else
echo "False!"
fi
或者
#!/bin/bash
read -p "Date (format YYYY-MN-DD-HH24:MM:SS): " input
check=$(date +%F-%T)
if [ "$input" == "$check" ]; then
echo "Right!"
else
echo "False!"
fi
测试良好:
cat >hesdate.sh # Copy 1st sample and paste to terminal
chmod +x hesdate.sh
date +%F ; ./hesdate.sh
2013-01-04
Date (format yyyy-mm-dd): 2013-01-04
Right!
cat >hesdate.sh # Copy 2nd sample and paste to terminal
date -d now\ +10\ sec +%F-%T ; ./hesdate.sh
2013-01-04-10:17:06 # copy this line
Date (format YYYY-MN-DD-HH24:MM:SS): 2013-01-04-10:17:06 # past exactly 10 secs after
Right!
编辑添加
为了测试日期,您可以:
[[ $input =~ ^[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]$ ]]
if [[ $input =~ ^2012-[0-9][0-9]-[0-9][0-9]-[0-9][0-9]:[0-9][0-9]:[0-9][0-9]$ ]];then
和/或
inputSecs=$(date -d "${input%-*} ${input##*-}" +%s)
使用引导方法让您确认输入的格式 和 可靠性
更强的方法
如果你想检查输入,有一个更好的方法:
unset adate
declare -A adate
date=2013-12-04-10:17:06
for field in s:0-59 m:0-59 h-0-23 D-1-31 M-1-12 Y#2000-2100 ;do
sep=${field:1:1} min=${field:2} field=${field:0:1} max=${min#*-} min=${min%-*}
crt=${date##*${sep:-#}}
((min<=10#$crt&&10#$crt<=max)) && adate[$field]=$crt ||
echo Error: $crt not between $min and $max in $field field.
date=${date%$sep*}
done
declare -p adate
这将转储adate
数组变量:
declare -A adate='([D]="04" [M]="12" [Y]="2013" [h]="10" [m]="17" [s]="06" )'
从那里,您可以重新验证天数:
max=$(date -d "${adate[Y]}-${adate[M]}-1 +1 month -1 day" +%d)
((10#${adate[D]}>max)) && echo "Error Day number too high: (${adate[D]}>$max)."
唯一没有测试的是字段长度,如果
date=2012-02-29-10:17:06
将工作,然后
date=2012-2-29-10:17:06
也可以(日字段中只有一位数字)。
如果需要,您可以更改该行:
for field in s:0-59 m:0-59 h-0-23 D-1-31 M-1-12 Y#2000-2100 ;do
sep=${field:1:1} min=${field:2} field=${field:0:1} max=${min#*-} min=${min%-*}
crt=${date##*${sep:-#}}
为了
for field in s:20-59 m:20-59 h-20-23 D-21-31 M-21-12 Y#42000-2100 ;do
sep=${field:1:1} len=${field:2:1} min=${field:3} field=${field:0:1} max=${min#*-} min=${min%-*}
crt=${date##*${sep:-#}}
[ ${#crt} -eq $len ] || echo "Error: Field $field is no $len len: ${#crt}."
注意:年份字段被任意限制在 2000 到 2100 之间,但这很容易理解/更改。