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Old 03-29-2004, 10:10 AM   #1
cmfarley19
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Get file modification date/time in Bash script


Greeting all.

I am modifying a bash script that generates a web based photo album from a directory of photos.

I want to add text below the thumbnail that displays the date the photo was taken ( file created ).

The stat command gives me part of what I need:
Code:
[cfarley@wombat cfarley]$ stat -c %y test.txt
2004-02-20 14:10:37.000000000 -0500
or
Code:
[cfarley@wombat cfarley]$ stat -c %Y test.txt
1077304237
Is there a command I can pipe the output of stat to that will return the date only?

Any thoughts?

CMF
 
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Old 03-29-2004, 10:49 AM   #2
jim mcnamara
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Code:
$ stat -c %Y test.txt | sed 's/test.txt//'
 
Old 03-29-2004, 11:06 AM   #3
Hko
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Code:
stat -c %y test.txt | cut -d ' ' -f1
or, using sed:
Code:
stat -c %y test.txt | sed 's/^\([0-9\-]*\).*/\1/'
Or use bash' string manipulation (may be a little faster):
Code:
MODDATE=$(stat -c %y test.txt)
MODDATE=${MODDATE%% *}
echo $MODDATE

Last edited by Hko; 03-29-2004 at 11:10 AM.
 
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Old 03-29-2004, 12:05 PM   #4
cmfarley19
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Excellent.
Those seem to work.
Still interested in seeing other solutions.
 
Old 04-23-2004, 08:42 AM   #5
J_Szucs
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[cfarley@wombat cfarley]$ stat -c %y test.txt | awk '{ printf $1 "\n"}'

Last edited by J_Szucs; 04-23-2004 at 09:25 AM.
 
Old 04-23-2004, 09:33 AM   #6
cmfarley19
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JSzucs...
I tried your suggestion and
Code:
stat -c %Y vs.exe | awk '{printf $1 "\n"}'
and
Code:
stat -c %Y vs.exe
yield the same results.
 
Old 04-23-2004, 06:27 PM   #7
J_Szucs
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Sure.

However, my suggestion was not:
stat -c %Y vs.exe | awk '{printf $1 "\n"}'

but:
stat -c %y vs.exe | awk '{printf $1 "\n"}'

Please note that letter "y" is lower case in my code. It makes a great difference!

As for the code: it uses awk, which I found one of the most useful tools (almost like grep or sed).
awk treats the input line as a (database) record containing fields, using (by default) the space character as the field separator (but a different field separator can be specified in the command).
Then you can refer to any field of the line using its index ($1, $2, $3, etc.)
Examples:
stat -c %y vs.exe | awk '{printf $1 ":" $3 "\n"}'
will print the first and the third fields on each line, putting ":" between the fields.
stat -c %y vs.exe | awk '{printf $1 ":" $3 }'
will print the same, but on one single output line, because there is no newline "\n" specified.

Apart from just printing specific parts (fields) of each line, you can perform calculations or sums based on them, and all in one command line.

Just google the web for awk examples.

Last edited by J_Szucs; 04-23-2004 at 06:32 PM.
 
Old 11-06-2007, 01:02 PM   #8
brsa
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Thanks, your hints were useful! Another way is to simply use date instead of stat:
Code:
date -r $file +%F
See man date for more infos.
 
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Old 06-26-2010, 08:51 PM   #9
errigour
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HKO I hope your watching this thread.

I browsed google for a way to use a bash script for printing the date of files onto an html page I have going that indexes files in my directory. http://relik.ath.cx/unused/ should show you what Im talking about. Anways I wanted to know if there was a way I could make
MODDATE=$(stat -c %y test.txt)
MODDATE=${MODDATE%% *}
print out the time and maybe the permissions of the file.
http://relik.ath.cx/unused/xhtml_html for anyone that wants a directory index just run this script in a place that doesn't have an index.html file you plan on keeping and contains html files you want listed.
 
Old 01-18-2013, 04:20 AM   #10
yech
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Quote:
Originally Posted by brsa View Post
Thanks, your hints were useful! Another way is to simply use date instead of stat:
Code:
date -r $file +%F
See man date for more infos.
excellent, as stat may not exist for small system.
 
Old 01-18-2013, 07:36 AM   #11
mina86
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By the way, you know about EXIF right?
 
Old 01-18-2013, 12:44 PM   #12
David the H.
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Please note that this is a resurrected necro-thread.

@yech, please don't re-open old threads unless you have something substantial to add to that discussion. I think your comment (even though I agree with it totally) is borderline in that respect.

OTOH, it does allow me to make a substantial addition of my own :

Code:
stat --printf='%Y' file
The --printf option lets you control the output format you want to use more precisely. Add '\n' if you need a trailing newline.

It's probably only available in gnu stat though.
 
Old 01-19-2013, 10:37 AM   #13
NevemTeve
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Also you can use option '-printf' of utility 'find'.

example:
Code:
find dir -name filename -printf '%TY-%Tm-%Td\n'

Last edited by NevemTeve; 01-23-2013 at 04:23 AM.
 
  


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