My goal is to get the file created in the current month in a directory.
It seems that the command is correct but not rendering any result:
Date=`date '+%b'`
echo $Date
Oct
ls -l | awk -v d="$Date" '/d/ {print $NF}'
2 Answers
You should use it this way:
ls -l | awk -v d="$Date" '$0 ~ d {print $NF}'
Explanation is here
But may be it's better to use find in your script.
find . -maxdepth 1 -type f -daystart -ctime -`date "+%d"`
If you have classic awk instead of gawk:
find * -prune -type f -cmin -`date '+%d %H %M' | awk '{print ($1*24+$2)*60+$3}'`
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+1 I hope you don't mind, I edited your link so that it points directly to the relevant section instead of the TOC.Joseph R.– Joseph R.2013-10-15 13:00:08 +00:00Commented Oct 15, 2013 at 13:00
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Since I am using AIX 6.1 machine the flags such as -maxdepth and -daystart are not available.Ram– Ram2013-10-15 13:34:16 +00:00Commented Oct 15, 2013 at 13:34
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Ok. I've added an update. Hope it helps.dchirikov– dchirikov2013-10-15 13:52:59 +00:00Commented Oct 15, 2013 at 13:52
The problem here is that awk has no way of telling that the d inside the pattern is meant to represent the variable of that name: awk is trying to match a literal d. You can make use of parameter expansion instead:
ls -l | awk "/$Date/ {print \$NF}"
That said, two things to note:
The time listed in
ls -loutput is the timestamp: the last time the file was modified, not created. File creation times are unreliable at best and unavailable at worst.You shouldn't parse the output of ls
Use
findinstead, as in dchirikov's answer.
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-vtells awk to use environmental variabledchirikov– dchirikov2013-10-15 12:24:15 +00:00Commented Oct 15, 2013 at 12:24 -
@dchirikov As far as I know,
-vis used to assign variables localized toawknot obtain variables from your current environment.Joseph R.– Joseph R.2013-10-15 12:42:23 +00:00Commented Oct 15, 2013 at 12:42 -
2Right. Environment variables can be accessed through the
ENVIRONarray. So if you previouslyexport Date, thenls -l | awk '$0 ~ ENVIRON["Date"] {print $NF}'will also work.manatwork– manatwork2013-10-15 12:48:48 +00:00Commented Oct 15, 2013 at 12:48 -
yep!
ENVIRONof course. And-vis for shell variables.dchirikov– dchirikov2013-10-15 12:57:04 +00:00Commented Oct 15, 2013 at 12:57 -
1@Ram Glad I helped. I believe dchirikov's answer was better though. Stay away from the output of
lsunless you're parsing it with your eyes.Joseph R.– Joseph R.2013-10-15 14:48:49 +00:00Commented Oct 15, 2013 at 14:48
findwith-mtime?-ctimeto catch when file attributes have changed.