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Top Forums UNIX for Beginners Questions & Answers How to extract date and time from filename? Post 303005542 by Home on Thursday 19th of October 2017 10:37:27 AM
Old 10-19-2017
How to extract date and time from filename?

Hi,

I'm totally new in sell script and working with a shell code. I want to extract the date and time from the filenames. The filenames are different but all of them begins with WI_ SCOPE_:

Code:
WI_SCOPE_DATA_CHANGE_2017-09-12_15-30-40.txt
WI_SCOPE_BACK_COMPLETE_QUEUE_2017-09-12_15-31-40.txt
WI_SCOPE_CURRENT_CHECK_QUEUE_2017-09-12_15-32-40.txt
WI_SCOPE_DAILY_PARTY_2017-09-12_15-33-40.txt

I want to write a for loop and read the files in current directory, then extract date and time, convert it to seconds and compare it with current time. If it is greater than 259200(30 days) , delete it. Then read the next file.

Can you please guide me how I can do this?

Thanks.
 

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MKMANIFEST(1)						      General Commands Manual						     MKMANIFEST(1)

NAME
mkmanifest - create a shell script to restore Unix filenames SYNOPSIS
mkmanifest [ files ] DESCRIPTION
Mkmanifest creates a shell script that will aid in the restoration of Unix filenames that got clobbered by the MSDOS filename restrictions. MSDOS filenames are restricted to 8 character names, 3 character extensions, upper case only, no device names, and no illegal characters. The mkmanifest program is compatible with the methods used in pcomm, arc, and mtools to change perfectly good Unix filenames to fit the MSDOS restrictions. EXAMPLE
I want to copy the following Unix files to a MSDOS diskette (using the mcopy command). very_long_name 2.many.dots illegal: good.c prn.dev Capital Mcopy will convert the names to: very_lon 2xmany.dot illegalx good.c xprn.dev capital The command: mkmanifest very_long_name 2.many.dots illegal: good.c prn.dev Capital > manifest would produce the following: mv very_lon very_long_name mv 2xmany.dot 2.many.dots mv illegalx illegal: mv xprn.dev prn.dev mv capital Capital Notice that "good.c" did not require any conversion, so it did not appear in the output. Suppose I've copied these files from the diskette to another Unix system, and I now want the files back to their original names. If the file "manifest" (the output captured above) was sent along with those files, it could be used to convert the filenames. SEE ALSO
arc(1), pcomm(1), mtools(1) local MKMANIFEST(1)
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