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Timestamp comparison

 
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# 1  
Old 12-15-2008
Timestamp comparison
How do I compare 2 timestamps (ie... if 2008-02-13 10:48:58.502075 gt 2008-12-15 16:00:00.000000)
# 2  
Old 12-15-2008
Quote:
Originally Posted by auzark
How do I compare 2 timestamps (ie... if 2008-02-13 10:48:58.502075 gt 2008-12-15 16:00:00.000000)

The easiest way is to use GNU date:

Code:
ts1="2008-02-13 10:48:58.502075"
ts2="2008-12-15 16:00:00.000000"

[ $( date -d "$ts1" +%s ) -gt $( date -d "$ts2" +%s ) ]

# 3  
Old 12-15-2008
Thanks, but this does not work in Unix on AIX
# 4  
Old 12-15-2008
Quote:
Originally Posted by auzark
Thanks, but this does not work in Unix on AIX

Sometimes GNU date is installed as gdate.

Or you can install it from ftp://ftp.gnu.org/gnu/coreutils/ftp:...gnu/coreutils/

Otherwise you have to convert it yourself. (I have shell functions to convert dates to Julian days at 8: The Dating Game)

To convert the time portion:

printf "%s\n" "10:48:58.502075" | awk -F: '{ print $1 * 3600 + $2 * 60 + $3 }'
# 5  
Old 12-15-2008
Thanks, for your help, I'll have a go at the conversion to Julian. We do not have gdate installed nor do I have the authority to install it
 
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