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how to compare date

how to compare date# Unix - 噫吁兮，危乎高哉

w*c2002-04-03 08:04

1 楼

another question:
in shell script, how to compare date? for instance, give the
"19/Mar/2002:17:14:06", ask if this time is within a specified
time slot, for example, last 50 minutes? how could you implment
it?
thanks! Here are a lot of unix guru.really benefit from it.

s*i2002-04-03 08:04

2 楼

you can use something like this to compare two time:
#!/bin/bash
E_NOTSAMEDAY=-197
E_PARAM_ERR=-198
if [ -z "$2" ]
then
exit $E_PARAM_ERR
fi
day1=`echo $1|cut -d: -f1`
hour1=`echo $1|cut -d: -f2`
min1=`echo $1|cut -d: -f3`
#sec1=`echo $1| cut -d: -f4`
day2=`echo $2|cut -d: -f1`
hour2=`echo $2|cut -d: -f2`
min2=`echo $2|cut -d: -f3`
#sec2=`echo $2| cut -d: -f4`
if [[ "$day1" != "$day2" ]]
then
exit $E_NOTSAMEDAY
fi
diffh=$((hour2-hour1))
diffm=$((min2-min1))
difft=$((diffh*60+diffm))
ech

【在 w****c 的大作中提到】

: another question:
: in shell script, how to compare date? for instance, give the
: "19/Mar/2002:17:14:06", ask if this time is within a specified
: time slot, for example, last 50 minutes? how could you implment
: it?
: thanks! Here are a lot of unix guru.really benefit from it.