Bash scripting

Neljor · 03-15-2021, 11:17 PM

Made this simple script, but it does not work.

Code:

#! /bin/bash
  
DAY=$(date | awk '{print $1,$2,$3}')

echo "List of the packages installed today $DAY:"
 rpm -qa --queryformat '%{NAME} was installed on %{INSTALLTIME:date}\n' | grep $DAY

exit $0

Any suggestions how this should be done?
Thanks in advantage!

Peter

dugan · 03-16-2021, 12:18 AM

Code:

grep $DAY

should be

Code:

grep "$DAY"

ShellCheck would have told you that.

The "exit" line is both wrong ("$0" is the name of the script) and unnecessary. I assume you mean "exit 0", which is redundant.

evo2 · 03-16-2021, 12:29 AM

Hi,

Code:

DAY=$(date +'%b %e [0-9][0-9]:[0-9][0-9]:[0-9][0-9] %Y')
rpm -qa --queryformat '%{NAME} was installed on %{INSTALLTIME:date}\n' | grep -E "$DAY"

Probably just the quotes around "$DAY" will make it work.
The other fix change is to match year, month and day of month.

Evo2.

N.B. I couldn't find any documentation on how the date string from the rpm command is formatted. If it changes with the locale you could find yourself with an additional problem.

pan64 · 03-16-2021, 02:34 AM

this is the best I could find: http://www.l3jane.net/doc/soft/max-r...ery-parts.html
and this: http://lists.rpm.org/pipermail/rpm-l...il/001122.html

shruggy · 03-16-2021, 04:38 AM

Quote:

Originally Posted by evo2

I couldn't find any documentation on how the date string from the rpm command is formatted.

From the rpm manual page:

Quote:

:date

Use strftime(3) "%c" format.

:day

Use strftime(3) "%a %b %d %Y" format.

Quote:

Originally Posted by evo2

If it changes with the locale you could find yourself with an additional problem.

Yep, it's locale dependent when using :date or :day type tags (though the :day output has fixed format sequence %a %b %d %Y as per above)

Code:

$ rpm -q rpm --qf '%{n}: %{installtime}\n'
rpm: 1607559087
$ LC_ALL=de_DE rpm -q rpm --qf '%{n}: %{installtime:day}\n'
rpm: Do Dez 10 2020
$ LC_ALL=C rpm -q rpm --qf '%{n}: %{installtime:day}\n'
rpm: Thu Dec 10 2020

Neljor · 03-16-2021, 11:39 AM

Thank you all for the replies, very helpful

Have changed the script in this:

Code:

#! /bin/sh
  
LC_ALL=C
DAY=$(date +'%a %b %d %Y')

echo "List of the packages installed today $DAY:"
 rpm -qa --queryformat '%{NAME} was installed on %{INSTALLTIME:day}\n' | grep -E "$DAY"

exit 0