script to retrieve file for prior day

aronmelon · #1 (**permalink**) 05-26-2009

Is there a way to Create file name for the prior Sunday of the run_date
if my Run_date =05262009, i need to the file with the
File name= filename.Y20090524.zip

Thanks in advance

colemar · #2 (**permalink**) 05-26-2009

Quote:

Originally Posted by aronmelon

Is there a way to Create file name for the prior Sunday of the run_date

This is not trivial.
Possible solutions include perl, ksh93, GNU date command, GNU awk.

GNU date:

Code:

last_sunday_yyyymmdd=$(date -d "-$(date +%w) days" +%Y%m%d)
day_of_run=20090523
prior_sunday_yyyymmdd=$(date -d "$day_of_run -$(date -d $day_of_run +%w) days" +%Y%m%d)

GNU awk:

Code:

last_sunday_yyyymmdd=$(awk 'BEGIN{print strftime("%Y%m%d",systime()-86400*strftime("%w",systime()))}')

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