CODEWITHSUNDEEP
linuxshellaix
hb.Sara
hb.Sara

Reputation: 341

Using date utility on Linux and AIX

To verify a valid date I use the command line below: 

date -d "${DATE}" "+%Y/%m/%d" > /dev/null 2>&1

It works perfectly under Cygwin, but not in my test environment. Here's some information about my test environment:

uname -a
AIX 152101a07e 3 5 00CDE2314C00

Using the command line:

echo $?

The result is always 1, even if the date is valid.

Do you have any idea why this test fails?

Upvotes: 0

Views: 266

Answers (1)

ford
ford

Reputation: 11866

Apparently, your two environments are not running the same version of date. You should check the man page for date in your new environment (run man date). On my machine (OS X), the -d option is used for setting daylight savings time.

For example, the following works for me:

date -j -f "%Y/%m/%d" "2014/07/09" > /dev/null 2>&1
echo $?  # 0

date -j -f "%Y/%m/%d" "2014.07.09" > /dev/null 2>&1
echo $?  # 1

-j tells it to not try to set my system date. -f means to use the specified format.

Yours may be different, but you can find out the details by reading the manual.

Upvotes: 3

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